Martin Chavez

Sr Full Stack Engineer at EPAM Systems

Architected and developed full-stack applications using Angular, React, Django, and FastAPI, improving system responsiveness by 25%. Modernized monolithic systems into microservices architecture, reducing data redundancy by 50% and enhancing maintainability. Designed robust APIs integrating AI/ML pipelines into cloud-based healthcare platforms, enabling automated patient data analysis. Led Kafka-based streaming systems design, increasing throughput by 45% and reducing data transfer errors by 30%. Used FastAPI's asynchronous capabilities to reduce API latency by 25%, configured load balancing with Nginx, maintained Kubernetes clusters, and established secure RBAC with OAuth2 and JWT, decreasing security vulnerabilities by 20%. Collaborated in Agile ceremonies, led integration testing, and implemented TDD for all software.

Full Stack Developer at Gainwell Technologies

Led design and development of scalable Patient Management System using Django, FastAPI, Flask, ensuring secure patient record management. Spearheaded API development, containerization with Docker, and Jenkins CI/CD pipeline setup, reducing deployment cycles by 60%. Integrated React and Angular with backend services, improving user experience. Optimized high-concurrency AI-driven analytics systems, reducing latency by 40%. Partnered with DevOps team automating infrastructure with Terraform and Docker, improving deployment speed by 50%. Coordinated product roadmap synthesis with business analysts, achieving a 98% on-time project completion rate. Conducted code reviews and mentored junior developers, reducing defects by 30% and increasing productivity by 20%.

Full Stack Developer at QCM Technologies

Designed and deployed scalable enterprise applications using Flask and Django, increasing performance by 40% and reducing operational costs by 20%. Managed and optimized PostgreSQL and SQL Server databases improving uptime by 30% and reducing retrieval issues by 15%. Built RESTful APIs for integration with third-party systems improving data processing efficiency by 40%. Refactored legacy Python codebases, enhancing accessibility compliance by 30%. Collaborated with UI/UX designers to refine interface elements reducing user-reported issues by 15% and increasing retention through improved usability.

Sr Full Stack Engineer at EPAM Systems

Architected and developed full-stack applications using Angular 13, React 18, and .NET Core Web API, improving system responsiveness by 25%. Led design and integration of logistics management systems, improving operational efficiency by 30%. Modernized monolithic systems to microservices architecture reducing data redundancy by 50%. Designed Kafka-based streaming systems increasing throughput by 45%. Delivered dynamic responsive UIs with React 18. Facilitated efficient service communication using message brokers and event-driven patterns achieving 70% improvement in transaction handling time. Led platform integration efforts including CRM and cloud SaaS. Developed and maintained APIs boosting product extensibility. Optimized integration workflows with Power BI improving decision-making by 35%. Built project management dashboard in Power BI, improving project delivery speed by 20%. Deployed multi-cloud solutions using Azure and AWS optimizing cost by 25% and increasing fault tolerance.

Full Stack Developer at Gainwell Technologies

Led design and development of scalable Patient Management System using .NET Core Web API, Azure AD B2C, and AKS ensuring secure management of patient data. Spearheaded API development, Docker containerization, and CI/CD pipeline setup in Azure DevOps with robust security measures including encryption and authentication. Implemented GraphQL APIs using HotChocolate improving API flexibility. Configured Jenkins pipelines cutting deployment cycles by 60%. Integrated React 16 and Angular with backend services enhancing user experience. Conducted API performance testing optimizing for high concurrency reducing latency by 40%. Partnered with DevOps team to automate infrastructure with Terraform and Docker improving deployment speed by 50%. Coordinated product roadmaps with business analysts reducing project delays by 20%. Conducted code reviews and mentored junior developers reducing defects by 30% and increasing team productivity by 20%.

Full Stack Developer at QCM Technologies

Designed and deployed scalable enterprise applications using ASP.NET MVC and C# increasing performance by 40% and reducing operational costs by 20%. Managed and optimized SQL Server databases increasing uptime by 30%. Built RESTful APIs for third-party integration improving data sharing and processing efficiency by 40%. Refactored legacy ASP.NET codebases ensuring accessibility compliance by 30% and adherence to web standards. Collaborated with UI/UX designers to refine interfaces reducing user-reported issues by 15% and boosting user retention.

Sr Full Stack Engineer at EPAM Systems

Architected and developed full-stack applications using Angular 13, React 18, and .NET Core Web API, achieving a significant improvement in system responsiveness and load times. Led design and integration of logistics management systems optimizing supply chain processes with multiple 4PL partners. Modernized monolithic systems into microservices, reducing data redundancy. Led Kafka-based streaming system implementation to increase throughput and reduce errors. Developed dynamic user interfaces prioritizing accessibility and responsive design. Implemented event-driven patterns and message brokers for high-volume transactions, improving handling time and latency. Designed and maintained scalable APIs supporting seamless external integrations including Power BI, enhancing reporting and decision making. Deployed multi-cloud solutions on Azure and AWS, achieving cost savings and higher fault tolerance. Maintained Kubernetes clusters and established secure authentication protocols, reducing

Full Stack Developer at Gainwell Technologies

Led design and development of a scalable Patient Management System using .NET Core Web API, Azure AD B2C, and AKS to securely manage patient records and appointments. Spearheaded API development, containerization with Docker, CI/CD pipeline setups in Azure DevOps, and security implementations including data encryption and authentication. Developed GraphQL APIs to enhance frontend flexibility. Configured Jenkins pipelines to cut deployment cycles significantly. Integrated React and Angular with backend services to enhance user experience. Conducted API performance testing optimizing for high concurrency and latency reduction. Partnered with DevOps for infrastructure automation using Terraform and Docker, improving deployment speed and reliability. Coordinated product roadmaps with analysts reducing project delays. Mentored junior developers, increasing team productivity and reducing code defects.

Full Stack Developer at QCM Technologies

Designed and deployed scalable enterprise applications using ASP.NET MVC and C#, improving system performance and reducing operational costs. Managed and optimized SQL Server databases increasing uptime and reducing data retrieval issues. Developed RESTful APIs for third-party integrations, enhancing data sharing and processing efficiency. Refactored legacy codebases to improve accessibility compliance and web standards adherence. Collaborated with UI/UX designers to refine interfaces, reducing user-reported issues and increasing retention.

Senior Software Engineer at EPAM Systems

Led modernization of a high-traffic loan servicing platform by replacing latency-prone monolithic components with fault-tolerant Nest.js and Express.js microservices on AWS (EC2, RDS, S3, Lambda), reducing 30-second form submission delays and timeouts during peak traffic, restoring revenue and customer trust. Designed and delivered secure, compliance-ready API integrations (OAuth2, JWT, RBAC) consolidating data from CRM, SaaS marketing tools, and analytics services into a unified operational layer. Implemented distributed event-driven architecture using Apache Kafka with Avro schemas, enabling asynchronous, strongly typed communication and 45% throughput improvements, processing 10k+ loan-related events/hour with no message loss. Orchestrated zero-downtime migrations with strangler pattern, shadow consumers, Kubernetes blue-green deployments, and canary releases for phased rollouts and instant rollback. Integrated ML models (credit scoring, fraud detection) via REST/gRPC and Kafka to e

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node with Express for a cloud-based healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) to deliver secure, highly available patient data storage and real-time access for clinicians across facilities. Built RESTful APIs to integrate advanced ML models for automated diagnostics and NLP summarization of patient histories using TensorFlow, scikit-learn, and Hugging Face Transformers. Enhanced system performance for high-concurrency workloads by implementing asynchronous programming patterns, optimizing database queries, and introducing Redis caching, reducing API latency by 40%. Created React-based analytics dashboards for patient monitoring, predictive alerts, and medical report generation. Automated infrastructure provisioning and deployment workflows using Docker, Terraform, and Jenkins, improving environment consistency and provisioning time by 50%. Conducted advanced PostgreSQL optimization with indexing, query

Full Stack Developer at QCM Technologies

Developed a real-time bidding platform in Node.js (Express.js) capable of handling up to 20,000 bid requests per second, implementing campaign targeting and budget pacing algorithms to improve targeting accuracy and spend efficiency. Built ETL workflows using AWS Lambda and S3 to aggregate logs from multiple ad exchanges and integrated these with reporting modules. Designed and normalized MySQL schemas for campaign data and historical archives. Created dynamic React dashboards for campaign configuration and performance tracking. Implemented partner API integrations using REST, secured via basic authentication and IP whitelisting, and automated recurring data aggregation with Lambda to ensure timely KPI delivery.

Senior Software Engineer at EPAM Systems

Led architectural modernization for a high-traffic loan servicing platform by replacing latency-prone monolithic components with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda), eliminating 30-second form submission delays, reducing timeouts during peak traffic, and restoring revenue flow and customer trust.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node.js/Express for a cloud-based healthcare platform. Built RESTful APIs to integrate ML models for automated diagnostics and natural language summaries of patient histories, enabling real-time clinical recommendations. Improved API latency by 40% through asynchronous programming and Redis caching.

Full Stack Developer at QCM Technologies

Developed a real-time bidding platform in Node.js (Express) capable of handling up to 20,000 bid requests per second; built ETL workflows using AWS Lambda and S3; designed normalized MySQL schemas and React dashboards to support advertisers.

Senior Software Engineer at EPAM Systems

Spearheaded architectural modernization for a high-traffic loan servicing platform by replacing latency-prone monoliths with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Achieved substantial latency reductions, eliminated 30-second form submission delays, and improved resiliency during peak traffic. Delivered secure, compliance-ready API integrations (OAuth2, JWT, RBAC) consolidating CRM, marketing, and analytics data into a unified operational layer. Designed a distributed event-driven architecture using Apache Kafka with Avro schemas, enabling asynchronous, strongly typed communication and throughput improvements of 45%, processing 10k+ loan events/hour with no data loss. Executed zero-downtime migrations using strangler pattern, shadow consumers, blue-green deployments, and canary releases with feature toggles. Integrated ML models for real-time credit scoring and fraud detection via REST/gRPC and Kafka, enabling instant risk assessment

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node/Express for a cloud-based healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) to deliver secure, highly available patient data storage and real-time clinician access across facilities. Built RESTful APIs to integrate machine learning models for automated diagnostics and summaries, using TensorFlow, scikit-learn, and Hugging Face transformers for instant clinical recommendations. Improved performance for high-concurrency workloads with async patterns, Redis caching, and optimized EF Core queries, reducing API latency by 40%. Created React analytics dashboards for patient monitoring and reports. Automated infrastructure provisioning and deployment with Docker, Terraform, and Jenkins, improving environment consistency and provisioning time by 50%. Implemented PostgreSQL indexing strategies, query refactoring, and materialized views for 35% performance gains at peak usage.

Full Stack Developer at QCM Technologies

Developed a real-time bidding (RTB) platform in Node.js (Express) handling 20k bid requests/sec, implementing campaign targeting and budget pacing. Built ETL pipelines using AWS Lambda and S3 to aggregate logs from multiple exchanges for analytics readiness. Normalized MySQL schemas for campaigns and metrics to ensure data integrity at scale. Created React dashboards for campaign configuration and performance tracking, enabling advertisers to manage campaigns without engineering involvement. Built partner API integrations secured with HTTP basic auth and IP whitelisting, and automated recurring data aggregation via Lambda.

Senior Software Engineer at EPAM Systems

Led architectural modernization of a high-traffic loan servicing platform by replacing latency-prone monoliths with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Reduced 30-second form submissions and timeouts during peak traffic, restoring revenue flow and customer trust. Delivered secure, compliant API integrations using OAuth2, JWT, and RBAC, consolidating CRM, SaaS marketing tools, and analytics services into a unified operational layer. Designed a distributed event-driven architecture with Apache Kafka and Avro, enabling asynchronous, strongly typed messaging and a 45% throughput improvement, processing 10,000+ loan-related events per hour with no message loss. Orchestrated zero-downtime migrations via the strangler pattern, shadow consumers, Kubernetes blue-green deployments and canary releases with feature toggles. Integrated ML models (credit scoring, real-time fraud detection) via REST/gRPC and Kafka, enabling instant risk assessme

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node/Express for a cloud healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) to deliver secure, highly available patient data storage and real-time access for clinicians across facilities. Built RESTful APIs to integrate in-house ML models for automated diagnostics and NLP-based summaries of patient histories, utilizing TensorFlow, scikit-learn, and HuggingFace transformers to deliver instant, context-aware clinical recommendations. Improved performance for high concurrency with asynchronous patterns, Redis caching, and optimized queries, reducing API latency by 40%. Created React-based analytics dashboards with data visualizations for patient monitoring, predictive alerts, and medical report generation. Automated infrastructure provisioning and deployment workflows using Docker, Terraform, and Jenkins, improving environment consistency and provisioning time by 50%. Optimized PostgreSQL queries with indexing and

Full Stack Developer at QCM Technologies

Developed a real-time bidding (RTB) platform in Node.js (Express.js) capable of handling up to 20,000 bid requests per second, implementing campaign targeting, audience segmentation, and budget pacing algorithms to improve targeting accuracy and spend efficiency. Built ETL workflows using AWS Lambda and S3 to aggregate impression, click, and conversion logs from multiple ad exchanges, integrating with reporting modules and partner APIs. Designed and normalized MySQL schemas for campaign data and metrics, ensuring data integrity and optimizing retrieval for large-scale reporting. Created dynamic React dashboards for campaign configuration and performance tracking, reducing operational turnaround times. Implemented partner API integrations via REST secured with basic authentication and IP whitelisting, and automated recurring data aggregation with Lambda to ensure timely KPI delivery.

Senior Software Engineer at EPAM Systems

Led architectural modernization for a high-traffic loan servicing platform by replacing latency-prone monoliths with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Implemented zero-downtime migrations using the strangler pattern with shadow consumers, blue-green deployments, and canary releases. Delivered secure, compliance-ready API integrations using OAuth2/JWT/RBAC, integrating data across CRMs, SaaS marketing tools, and analytics services. Implemented a distributed event-driven architecture with Apache Kafka and Avro, enabling asynchronous, strongly typed communication and throughput improvements around 45%, while processing over 10k loan-related events per hour. Integrated ML models for credit scoring and real-time fraud detection via REST/gRPC and Kafka, reducing manual underwriting by 40% and fraudulent approvals by 25%. Built real-time React dashboards with Socket.io, optimized MongoDB queries, and applied TDD with Jest and Moq, impr

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node/Express for a cloud-based healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) for secure, highly available storage and real-time clinician access across facilities. Built RESTful APIs to integrate in-house ML models for automated diagnostics and NLP-based summaries of patient histories, delivering context-aware clinical recommendations. Improved performance for high-concurrency workloads with async/await, Redis caching, and optimized PostgreSQL queries, reducing API latency by 40%. Created React analytics dashboards for patient monitoring, predictive alerts, and report generation. Automated infrastructure provisioning and deployment workflows using Docker, Terraform, and Jenkins, increasing environment consistency and reducing provisioning time by 50%.

Full Stack Developer at QCM Technologies

Developed a real-time bidding (RTB) platform in Node.js (Express.js) capable of handling up to 20,000 bid requests per second, with campaign targeting, audience segmentation, and budget pacing. Built ETL workflows using AWS Lambda and S3 to aggregate logs from multiple ad exchanges, integrating with reporting modules and partner APIs for timely KPI delivery. Designed normalized MySQL schemas for campaigns and metrics, and created React dashboards for configuration and performance tracking. Implemented secure partner API integrations via REST and automated recurring data aggregation processes to ensure timely analytics.

Senior Software Engineer at EPAM Systems

Led modernization of a high-traffic loan servicing platform from monolith to microservices, slashing 30-second submission delays, reducing timeouts and duplicate applications during spikes. Implemented Kafka with Avro schemas to enforce strict message contracts, boosting throughput by 45% and enabling 10,000+ loan events/hour. Enabled zero-downtime migrations via strangler pattern with shadow consumers, feature toggles, and Kubernetes blue-green canaries. Integrated AI-powered credit scoring to accelerate risk assessment and reduce underwriting time by 40%. Built fraud detection pipelines using PyTorch and MLflow, deployed as Kafka consumers, reducing fraudulent approvals by 25%. Delivered robust GraphQL and REST APIs (FastAPI, Strawberry) with optimized inter-service communication (gRPC), reducing latency by 25-33%. Implemented secure integrations for a global retail engagement platform using OAuth2, JWT, RBAC. Led UI with React dashboards; optimized MongoDB for near real-time reporti

Software Engineer at Gainwell Technologies

Developed HIPAA-compliant Patient Management System on AWS; designed Django APIs to integrate AI/ML pipelines (scikit-learn, TensorFlow, pandas) for automated patient data analysis, improving diagnostic accuracy and reducing manual reviews. Integrated Hugging Face Transformers and LangChain to enable NLP over patient histories for instant clinician summaries. Optimized asynchronous FastAPI endpoints and NumPy vectorization to reduce latency by 40% under high concurrency. Built data visualizations with React; automated deployments with Docker, Terraform, and Jenkins, reducing provisioning time by 50% and increasing reliability. Collaborated with business analysts to align deliverables with roadmaps; implemented PostgreSQL indexing to reduce query times by 35% during peak usage. Established CI/CD with Jenkins, Docker, and Terraform to automate infra and deployment, cutting delivery timelines by 50%.

Full Stack Developer at QCM Technologies

Built a real-time bidding (RTB) application in Django/Python handling up to 20,000 bid requests per second. Implemented campaign targeting, audience segmentation, and budget pacing; designed batch ETL to process impressions, clicks, and conversions from multiple ad exchanges. Developed PostgreSQL/MySQL schemas and jQuery dashboards for advertisers to configure campaigns. Exposed REST APIs for data exchange with DSP/SSP partners and secured endpoints with HTTP authentication and IP whitelisting.

Senior Software Engineer at EPAM Systems

Led the modernization of a high-traffic loan servicing platform by migrating from a monolith to microservices on AWS. Implemented Kafka with Avro schemas to enforce strict message contracts, improving throughput by 45% and handling 10,000+ loan events/hour. Conducted zero-downtime migrations using the strangler pattern with shadow consumers, feature toggles, and Kubernetes blue-green canary releases to minimize risk. Integrated AI-powered credit scoring models to enable instant risk assessment and reduce manual underwriting time by 40%. Built fraud-detection pipelines with PyTorch and MLflow, processing real-time applicant data to reduce fraudulent approvals by 25%. Developed GraphQL and REST APIs (FastAPI, Strawberry) for unified data access and improved query performance by 33%. Strengthened inter-service communication with gRPC and message brokers, reducing latency by 25%. Led secure integrations with OAuth2, JWT, and RBAC to ensure regulatory compliance. Contributed to UI in React

Software Engineer at Gainwell Technologies

Developed a HIPAA-compliant Patient Management System on a cloud-based platform, ensuring secure handling of patient records, appointments, and histories. Built APIs with Django to integrate AI/ML pipelines (scikit-learn, TensorFlow, pandas) for automated data analysis, increasing diagnostic support and reducing manual review. Integrated Hugging Face Transformers and LangChain to enable natural language queries over patient histories, delivering context-aware summaries for clinicians. Optimized asynchronous FastAPI endpoints and NumPy-based operations to reduce latency by 40% during high-concurrency workloads. Directed frontend data visualization with React, improving clinician usability. Automated deployments using Docker, Terraform, and Jenkins, shortening provisioning time by 50% and increasing deployment reliability. Collaborated with business analysts to align deliverables with product roadmaps, reducing project delays by 20%. Optimized PostgreSQL queries and indexing to improve a

Full Stack Developer at QCM Technologies

Developed a real-time bidding (RTB) application in Django and Python, handling up to 20,000 bid requests per second with acceptable latency. Built server-side modules for campaign targeting, audience segmentation, and budget pacing. Implemented batch ETL to process impressions, clicks, and conversions from multiple ad exchanges. Designed PostgreSQL/MySQL schemas for campaign data, metrics, and reporting. Created jQuery dashboards for advertisers to configure campaigns. Exposed RESTful APIs for data exchange with DSPs and SSPs to accelerate onboarding. Wrote cron-based ETL scripts to aggregate daily performance metrics. Implemented basic HTTP authentication and IP whitelisting for security.

Senior Software Engineer at EPAM Systems

Led architectural modernization of a high-traffic loan servicing platform by replacing latency-prone monoliths with fault-tolerant Nest.js/Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Implemented secure, compliant API integrations (OAuth2, JWT, RBAC) and consolidated data across CRM, SaaS marketing tools, and analytics into a unified operational layer. Designed distributed event-driven communication with Apache Kafka and Avro, enabling 45% throughput improvement and 10k+ events/hour with no message loss. Orchestrated zero-downtime migrations using strangler pattern, blue-green deployments, and canaries. Integrated ML models for credit scoring and fraud detection via REST/gRPC and Kafka, reducing manual underwriting time by 40% and fraudulent approvals by 25%. Built real-time React dashboards with Socket.io for staff adoption and efficiency.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node/Express for a cloud healthcare platform; leveraged AWS (EC2, S3, DynamoDB, IAM, CloudWatch) for secure, highly available patient data storage and real-time clinician access across facilities. Built REST APIs to integrate ML models for automated diagnostics and natural language summarization of patient histories, delivering instant clinical recommendations. Improved performance for high-concurrency workloads with async patterns and Redis caching, reducing API latency by 40%. Created React analytics dashboards for patient monitoring and reports; automated infrastructure with Docker, Terraform, and Jenkins, cutting provisioning time by 50%. Optimized PostgreSQL queries with indexing and materialized views for 35% performance gains during peak.

Full Stack Developer at QCM Technologies

Developed a real-time bidding (RTB) platform in Node.js capable of handling up to 20,000 bid requests per second, implementing campaign targeting, audience segmentation, and budget pacing. Built ETL workflows using AWS Lambda and S3 to aggregate logs from multiple ad exchanges and integrated with reporting modules. Designed normalized MySQL schemas for campaign data and metrics; created dynamic React dashboards for campaign configuration and performance tracking. Implemented partner API integrations via REST secured with basic auth and IP whitelisting; automated recurring data aggregation with AWS Lambda.

Senior Software Engineer at EPAM Systems

Led architectural modernization for a high-traffic loan servicing platform by replacing latency-prone monolithic components with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Delivered secure, compliance-ready API integrations, designed a distributed event-driven architecture using Apache Kafka with Avro schemas, and facilitated zero-downtime migrations via strangler pattern, blue-green deployments, and canary releases. Integrated ML models into loan processing for real-time risk assessment, built responsive React dashboards with real-time updates, and improved release reliability through TDD (Jest, Moq) and CI/CD with Jenkins/Docker. Mentored a cross-functional team of five engineers.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node.js/Express for a cloud-based healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) for secure, highly available patient data access. Built RESTful APIs integrating ML models for automated diagnostics and clinical recommendations, optimized asynchronous processing and caching to reduce latency, and created React analytics dashboards for clinical decision support. Automated infrastructure provisioning and deployment with Docker, Terraform, and Jenkins, and performed PostgreSQL performance tuning with indexing and materialized views.

Full Stack Developer at QCM Technologies

Developed a real-time bidding platform capable of handling up to 20,000 bid requests per second, with campaign targeting and budget pacing. Built ETL workflows using AWS Lambda and S3 to aggregate ad impressions, clicks, and conversions, and designed normalized MySQL schemas for large-scale reporting. Created dynamic React dashboards for campaign management and integrated partner APIs via REST, secured with IP whitelisting and basic authentication.

Senior Software Engineer at EPAM Systems

Led architectural modernization for a high-traffic loan servicing platform by replacing latency-prone monolithic components with fault-tolerant Nest.js and Express.js microservices deployed on AWS (EC2, RDS, S3, Lambda). Implemented a distributed event-driven architecture using Apache Kafka with Avro schemas, enabling asynchronous, strongly typed communication and throughput improvements of 45% while processing 10,000+ loan-related events per hour without data loss. Executed a zero-downtime strangler pattern migration with shadow consumers, blue-green deployments and canary releases. Integrated ML models (credit scoring, fraud detection) into loan workflows via REST/gRPC and Kafka, reducing manual underwriting by 40% and fraudulent approvals by 25%. Built real-time React dashboards with Socket.io; optimized MongoDB queries; applied TDD with Jest and Moq; CI/CD via Jenkins/Docker; mentored a cross-functional team of five.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node/Express for cloud-based healthcare platform, leveraging AWS (EC2, S3, DynamoDB, IAM, CloudWatch) to provide secure, highly available patient data storage and real-time clinician access. Built RESTful APIs to integrate in-house ML models for automated diagnostics and NLP-based summaries. Enhanced performance for high-concurrency workloads with async code, Redis caching, and optimized PostgreSQL queries. Created React analytics dashboards and automated infrastructure using Docker, Terraform, and Jenkins, improving environment consistency and deployment speed.

Full Stack Developer at QCM Technologies

Developed a real-time bidding platform in Node.js (Express.js) handling up to 20,000 bid requests per second, with campaign targeting and budget pacing. Built ETL workflows using AWS Lambda and S3, designed normalized MySQL schemas, and created React dashboards for campaign configuration and performance tracking. Implemented partner API integrations via REST with IP whitelisting and data aggregation processes to accelerate KPI delivery.

Senior Software Engineer at EPAM Systems

Led modernization of a high-traffic loan servicing platform by replacing latency-prone monoliths with Nest.js and Express.js microservices on AWS (EC2, RDS, S3, Lambda). Implemented secure API integrations, introduced an Apache Kafka-based event-driven architecture with Avro schemas, and performed zero-downtime migrations using strangler patterns, blue-green deployments, and canary releases. Integrated ML models via REST/gRPC and Kafka, enabling instant risk assessment and fraud detection. Built real-time React dashboards, optimized MongoDB queries, and improved CI/CD with Jenkins and Docker. Mentored a cross-functional team of five engineers.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node.js/Express for a cloud-based healthcare platform. Built secure data storage in AWS (EC2, S3, DynamoDB, IAM) with real-time clinician access; integrated ML models for diagnostics and history summarization using TensorFlow, scikit-learn, and Hugging Face transformers; improved API performance with async programming, Redis caching, and optimized queries. Created React analytics dashboards and automated infrastructure with Docker, Terraform, and Jenkins.

Full Stack Developer at QCM Technologies

Developed a real-time bidding platform capable of handling up to 20,000 bid requests per second; built ETL workflows using AWS Lambda and S3; designed normalized MySQL schemas; created React dashboards for campaign management; integrated partner REST APIs and automated recurring data aggregation.

Senior Software Engineer at EPAM Systems

Led architectural modernization of a high-traffic loan servicing platform by replacing latency-prone monoliths with fault-tolerant Nest.js/Express.js microservices on AWS (EC2, RDS, S3, Lambda). Implemented secure OAuth2/JWT/RBAC API integrations consolidating CRM, SaaS marketing tools, and analytics data into a unified layer. Designed a distributed event-driven architecture with Apache Kafka and Avro, boosting throughput by 45% and processing 10,000+ loan events per hour without message loss. Enabled zero-downtime migrations using strangler pattern, blue-green deployments, and canary releases. Integrated ML models for credit scoring and fraud detection via REST/gRPC and Kafka, reducing manual underwriting and fraudulent approvals. Built real-time React dashboards, tuned MongoDB queries, applied TDD with Jest and Moq, improving release reliability. Mentored a cross-functional team of five.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node.js/Express for cloud healthcare platform (AWS). Exposed RESTful APIs to ingest ML-based diagnostics and NLP-based summaries to support clinicians. Improved concurrency with async patterns, Redis caching; reduced latency by 40%. Created React analytics dashboards for patient monitoring, predictive alerts, and medical reports. Automated infra via Docker, Terraform, and Jenkins; improved environment consistency and provisioning time by 50%. Optimized PostgreSQL queries with indexing and materialized views to boost peak performance by 35%.

Full Stack Developer at QCM Technologies

Developed real-time bidding platform in Node.js (Express) handling up to 20,000 bid requests/sec; implemented targeting, audience segmentation, and budget pacing. Built ETL with AWS Lambda/S3; integrated with reporting modules and partner APIs for timely KPI delivery. Normalized MySQL schemas; built React dashboards for advertisers to configure and monitor campaigns. Implemented partner API integrations with HTTP Basic and IP whitelisting.

Senior Software Engineer at EPAM Systems

Led architectural modernization of a high-traffic loan servicing platform by migrating latency-prone monoliths to fault-tolerant Nest.js and Express.js microservices on AWS (EC2, RDS, S3, Lambda); implemented a distributed event-driven architecture using Apache Kafka with Avro schemas for asynchronous, strongly typed inter-service communication, delivering throughput improvements and reliability. Integrated machine learning models for credit scoring and real-time fraud detection via REST/gRPC and Kafka; performed zero-downtime migrations with strangler pattern, blue-green deployments, and canary releases. Built real-time React dashboards and optimized MongoDB queries, reducing response times and operational bottlenecks. Applied TDD with Jest and Moq; automated CI/CD via Jenkins and Docker; mentored a cross-functional team.

Software Engineer at Gainwell Technologies

Designed HIPAA-compliant Patient Management System on Node.js with Express for a cloud-based healthcare platform; integrated ML models for automated diagnostics and natural language summarization; improved performance with async patterns, Redis caching, and optimized PostgreSQL queries; built React analytics dashboards; automated infrastructure provisioning with Docker, Terraform, and Jenkins.

Full Stack Developer at QCM Technologies

Developed real-time bidding platform in Node.js (Express.js) capable of handling up to 20,000 bid requests per second; built ETL workflows with AWS Lambda and S3; designed MySQL schemas for campaigns and metrics; created React dashboards and partner API integrations.

Senior Software Engineer at EPAM Systems

Led design and delivery of microservices-based loan servicing and retail integrations on AWS; modernized monoliths to microservices; implemented Kafka with Avro; zero-downtime migrations; integrated AI-powered credit scoring; fraud detection pipelines with PyTorch and MLflow; built GraphQL and REST APIs; improved inter-service latency; secured integrations with OAuth2/JWT/RBAC; led React UI dashboards; MongoDB optimization; applied TDD; CI/CD with Jenkins.

Software Engineer at Gainwell Technologies

Developed HIPAA-compliant Patient Management System; AWS hosting; Django APIs to integrate AI/ML pipelines; Hugging Face Transformers and LangChain for NLP over patient histories; asynchronous FastAPI endpoints; React frontend; automated deployments with Docker, Terraform, and Jenkins; database query optimization in PostgreSQL; CI/CD with Jenkins and Terraform.

Full Stack Developer at QCM Technologies

Built monolithic RTB application in Django/Python handling up to 20,000 bid requests/sec; server-side modules for targeting, segmentation, pacing; batch ETL of impression, click, and conversion logs; PostgreSQL/MySQL schemas; jQuery dashboards; REST APIs for DSP/SSP partners; cron ETL scripts; security via HTTP authentication and IP whitelisting.

Senior Software Engineer at EPAM Systems

Led the modernization of a high-traffic loan servicing platform from a monolith to microservices, eliminating 30-second submission delays and timeouts during spikes. Implemented Apache Kafka with Avro for strict message contracts, enabling asynchronous, fault-tolerant pipelines and 10,000+ loan events/hour. Enabled zero-downtime migrations using strangler pattern with shadow consumers and feature toggles; deployed via Kubernetes blue-green and canary releases. Integrated AI-powered credit scoring and fraud-detection pipelines with PyTorch and MLflow; built GraphQL and REST APIs (FastAPI, Strawberry) for unified data access and reduced latency in inter-service communication with gRPC. Built secure integrations using OAuth2/JWT/RBAC and delivered real-time marketing dashboards in React. Optimized MongoDB performance and enforced TDD/CI-CD processes with Jenkins.

Software Engineer at Gainwell Technologies

Developed HIPAA-compliant patient management systems on AWS, ensuring secure storage and high availability. Designed Django APIs to integrate AI/ML pipelines (scikit-learn, TensorFlow, pandas) for automated data analysis; used Hugging Face Transformers and LangChain to enable NLP queries over patient histories. Reduced latency via asynchronous FastAPI endpoints and NumPy vectorization; connected frontend dashboards via React. Automated deployments with Docker, Terraform, and Jenkins; collaborated with business analysts to align with roadmaps and improve scalability. Optimized PostgreSQL query performance and indexing; built CI/CD workflows.

Full Stack Developer at QCM Technologies

Built and maintained a real-time bidding application in Django/Python handling up to 20,000 bid requests per second; developed batch ETL workflows for impression, click, and conversion logs; designed PostgreSQL and MySQL schemas and REST APIs for data exchange with demand- and supply-side partners. Created jQuery dashboards for campaign configuration and performance tracking; implemented security with basic HTTP authentication and IP whitelisting.