Available to hire
Hello! I am Ayush Dhar, a full-stack software engineer based in Chicago with 7+ years of experience delivering scalable, cloud-native applications across finance, e-commerce, and healthcare. I specialize in Java, Spring Boot, React.js, TypeScript, and AWS, with a strong focus on microservices, CI/CD, and event-driven architectures.
I enjoy applying GenAI and AI-assisted tooling to streamline workflows, having recently delivered OpenAI API and LangChain-powered solutions for knowledge management and developer onboarding. I thrive in collaborative, fast-paced environments and mentor teammates to adopt best practices in software design and DevOps.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Language
Javanese
Fluent
English
Fluent
Hindi
Advanced
Work Experience
Software Engineer at Capital One
May 31, 2025 - August 18, 2025Planned and deployed cloud-native microservices using Spring Boot and AWS Lambda integrated with SQS queues, accelerating loan approvals by 37% across distributed financial transaction systems. Refactored legacy monolith APIs into secure modular RESTful endpoints with OAuth2 and JWT, increasing authentication reliability to 99.97%. Automated infrastructure provisioning and CI/CD pipelines with Terraform, GitHub Actions, and Jenkins, reducing deployment cycle time by 64% and enabling consistent weekly releases. Optimized Elasticsearch indexes and PostgreSQL queries in fraud detection services, cutting search latency from 720ms to 180ms for real-time risk assessments. Implemented full-stack observability with Prometheus and Grafana dashboards, decreasing incident resolution time from 3 hours to under 90 minutes. Collaborated in Agile/Scrum teams using Jira and Confluence, improving story completion rates by 12%. Developed a GenAI-powered loan processing module integrating OpenAI APIs to
Software Developer at Hexaware Technologies
June 30, 2023 - August 18, 2025Developed e-commerce microservices for B2B2C and D2C platforms using Java, Spring Boot, and Spring Cloud, improving modularity and accelerating release cycles by 40% in high-traffic environments. Built scalable APIs with REST and gRPC and secure OAuth2 and JWT authentication for mobile, web, and third-party integration. Designed high-concurrency components for cart, payment, and inventory using Redis, Kafka, and MongoDB, supporting over 1 million concurrent users with low latency. Deployed microservices with Docker and Kubernetes on AWS with Terraform and Jenkins automation. Developed responsive dashboards with React.js, Redux, and TypeScript, enhancing user experience and reducing page load times by 30%. Integrated Elasticsearch for intelligent product search, reducing query latency by 50%, and engineered behavioral recommendation modules using Elasticsearch scoring and clickstream analysis, increasing product conversions by 15%.
Java Developer at Cybage Software
November 30, 2018 - August 18, 2025Supported migration of legacy systems to Spring Boot RESTful services, improving modularity by 30% and integrating patient record systems with pharmacy APIs. Developed reusable Java backend libraries for session tracking, input validation, and logging adopted across projects to maintain coding standards. Assisted frontend maintenance and bug fixes for React.js dashboards, reducing open UI tickets by 20%. Designed Kafka producer-consumer workflows for asynchronous invoice processing, reducing API bottlenecks by 25%. Developed SQL scripts for ETL data transformation and cleanup in healthcare billing. Participated in containerizing legacy services using Docker for dev-test environments. Collaborated on Jenkins CI test automation and monitored build health using basic ELK stack visualizations.
Software Engineer at Capital One
May 1, 2025 - August 27, 2025Planned and deployed cloud-native microservices using Spring Boot and AWS Lambda integrated with SQS queues, accelerating loan approvals by 37% in high-throughput financial systems. Refactored legacy monolith APIs into secure RESTful endpoints with OAuth2 and JWT, achieving 99.97% authentication success rate. Automated infrastructure provisioning and CI/CD pipelines using Terraform, GitHub Actions, and Jenkins, reducing deployment cycle time by 64% with consistent weekly production releases. Optimized Elasticsearch and PostgreSQL queries for fraud detection, lowering search latency from 720ms to 180ms and enhancing real-time risk assessments. Implemented full-stack observability with Prometheus and Grafana, cutting incident resolution time from 3 hours to under 90 minutes. Worked in Agile/Scrum teams improving story completion rate by 12%. Developed a GenAI-powered loan processing module integrating OpenAI APIs and internal workflows, reducing underwriting decision time by 48%.
Software Developer at Hexaware Technologies
June 1, 2023 - August 27, 2025Developed e-commerce microservices for B2B2C and D2C platforms using Java, Spring Boot, and Spring Cloud, improving deployment modularity and accelerating release cycles by 40%. Built secure scalable APIs with REST and gRPC protocols using OAuth2 and JWT authentication for mobile, web, and third-party integration. Designed high-concurrency components for cart, payment, and inventory using Redis, Kafka, and MongoDB, supporting over 1 million concurrent user sessions. Deployed microservices on AWS with Docker, Kubernetes, Terraform, and Jenkins CI/CD pipelines. Developed responsive dashboards using React.js, Redux, and TypeScript, reducing page load times by 30%. Integrated Elasticsearch for intelligent product search, reducing query latency by 50%. Engineered behavioral recommendation modules using Elasticsearch scoring and clickstream data analysis, boosting product conversions by 15%.
Java Developer at Cybage Software
November 30, 2018 - August 27, 2025Supported migration of legacy systems to Spring Boot RESTful services for healthcare patient record integrations. Built reusable Java backend libraries for session tracking, validation, and logging adopted across multiple projects. Assisted frontend maintenance and bug fixes on React.js dashboards reducing UI tickets by 20%. Designed Kafka producer-consumer workflows for asynchronous invoice processing reducing API bottlenecks by 25%. Developed SQL scripts for data transformation during ETL runs on PostgreSQL and MySQL databases. Contributed to containerizing legacy services with Docker for dev-test environments and helped establish Jenkins CI jobs and ELK stack monitoring for test automation and build health.
Software Engineer at Capital One
May 31, 2025 - August 27, 2025Planned and deployed cloud-native microservices using Spring Boot and AWS Lambda integrated with SQS queues, accelerating loan approvals by 37% in high-throughput financial systems. Refactored legacy monolithic APIs to secure RESTful endpoints with OAuth2 and JWT, achieving a 99.97% success rate for API transactions. Automated infrastructure and CI/CD pipelines using Terraform, GitHub Actions, and Jenkins, reducing deployment times by 64%. Optimized Elasticsearch and PostgreSQL queries in fraud detection services, cutting search latency from 720ms to 180ms. Implemented full-stack observability with Prometheus and Grafana, reducing incident resolution time from 3 hours to under 90 minutes. Contributed to Agile/Scrum processes, improving story completion rate by 12%. Developed a GenAI-powered loan processing module leveraging OpenAI APIs, reducing underwriting time by 48%.
Software Developer at Hexaware Technologies
June 30, 2023 - August 27, 2025Developed e-commerce microservices for B2B2C and D2C platforms using Java, Spring Boot, and Spring Cloud, accelerating release cycles by 40%. Built scalable REST and gRPC APIs secured with OAuth2 and JWT for mobile, web, and third-party integration. Designed high-concurrency components for cart, payment, and inventory handling over 1 million concurrent user sessions using Redis, Kafka, and MongoDB. Deployed microservices on AWS with Docker, Kubernetes, Terraform, and Jenkins CI/CD. Created responsive admin and customer dashboards with React.js, Redux, and TypeScript, reducing page load times by 30%. Integrated Elasticsearch for intelligent product search, reducing latency by 50%. Engineered behavioral recommendation modules increasing product conversions by 15%.
Java Developer at Cybage Software
November 30, 2018 - August 27, 2025Supported migration of legacy systems to Spring Boot REST services, enhancing modularity by 30% in healthcare patient record integrations. Created reusable Java backend libraries adopted across multiple projects for session tracking, validation, and logging. Maintained React.js dashboards reducing UI bugs by 20%. Designed Kafka producer-consumer workflows for asynchronous invoice processing, reducing bottlenecks by 25%. Developed SQL data transformation scripts for billing modules. Containerized legacy services for dev-test environments using Docker, preparing for Kubernetes rollout. Assisted with Jenkins CI setup and monitoring using ELK stack visualizations.
Software Engineer at Capital One
May 1, 2025 - September 22, 2025Supported cloud-native microservices using Java, Spring Boot, AWS Lambda, and SQS to enable scalable loan processing workflows; built full-stack modules with React.js and TypeScript; contributed to CI/CD pipelines with GitHub Actions, Jenkins, and Terraform; assisted in query optimization and Elasticsearch tuning; explored GenAI-powered knowledge assistants using OpenAI APIs and LangChain to improve onboarding and search efficiency.
Software Developer at Hexaware Technologies
June 1, 2023 - September 22, 2025Expanded e-commerce microservices using Java, Spring Boot, and Spring Cloud; developed secure OAuth2/JWT APIs for mobile/web integrations; created React.js/TypeScript dashboards for transaction monitoring; scaled high-concurrency modules with Kafka, Redis, and MongoDB; standardized deployments with Docker, Kubernetes, and Terraform; mentored 3 junior engineers.
Java Developer at Cybage Software India
November 1, 2018 - September 22, 2025Migrated legacy healthcare apps into modular Spring Boot REST services, enabling third-party API integrations; developed reusable Java backend libraries; optimized asynchronous workflows with Kafka; mechanized SQL ETL pipelines; guided interns on Java REST API development and database performance tuning.
Software Engineer at Capital One
May 1, 2025 - September 22, 2025Supported the development of cloud-native microservices using Java, Spring Boot, AWS Lambda, and SQS, enabling scalable loan processing workflows that achieved 30% faster approvals and improved transaction reliability. Built and enhanced full-stack modules with React.js and TypeScript, streamlining customer interactions, reducing manual support tickets by 25%, and driving greater adoption of self-service digital channels. Contributed to the design of CI/CD pipelines with GitHub Actions, Jenkins, and Terraform, helping reduce deployment times by 60%, minimize rollback incidents, and improve overall release reliability. Assisted in query optimization and Elasticsearch index tuning, lowering fraud detection query latency from 700ms to under 200ms. Experimented with Generative AI-powered knowledge assistants using OpenAI APIs and LangChain, improving developer onboarding and documentation search efficiency, and reducing ramp-up time for interns by 20%.
Software Developer at Hexaware Technologies
June 1, 2023 - September 22, 2025Expanded e-commerce microservices using Java, Spring Boot, and Spring Cloud, improving transaction speed by 40%. Developed secure OAuth2/JWT APIs for mobile/web integrations, boosting reliability and security by 25%. Created React.js/TypeScript dashboards for transaction monitoring, reducing manual ops by 20%. Scaled high-concurrency modules with Kafka, Redis, and MongoDB, supporting 1M+ concurrent sessions. Systematized deployments with Docker, Kubernetes, and Terraform, achieving 99.9% uptime. Mentored 3 junior engineers, conducting code reviews and guiding them on microservices best practices and CI/CD pipelines.
Java Developer at Cybage Software
November 1, 2018 - September 22, 2025Migrated legacy healthcare apps into modular Spring Boot REST services, enabling third-party API integrations. Developed reusable Java backend libraries, cutting duplicate coding across 3+ projects. Optimized asynchronous workflows with Kafka, reducing peak-load API bottlenecks by 25%. Mechanized SQL ETL pipelines, improving billing accuracy and reporting efficiency. Guided interns on Java REST API development and database performance tuning.
Software Engineer at Capital One
May 1, 2025 - May 1, 2025Supported the development of cloud-native microservices using Java, Spring Boot, AWS Lambda, and SQS, enabling scalable loan processing workflows that achieved 30% faster approvals and improved transaction reliability. Built and enhanced full-stack modules with React.js and TypeScript, streamlining customer interactions, reducing manual support tickets by 25%, and driving greater adoption of self-service digital channels. Contributed to the design of CI/CD pipelines with GitHub Actions, Jenkins, and Terraform, helping reduce deployment times by 60%, minimize rollback incidents, and improve overall release reliability. Assisted in query optimization and Elasticsearch index tuning, which lowered fraud detection query latency from 700ms to under 200ms, enabling near real-time risk assessments and faster transaction validation. Experimented with Generative AI-powered knowledge assistants using OpenAI APIs and LangChain, improving developer onboarding and documentation search efficiency, an
Software Developer at Hexaware Technologies India
June 1, 2023 - June 1, 2023Expanded e-commerce microservices using Java, Spring Boot, and Spring Cloud, improving transaction speed by 40%. Developed secure OAuth2/JWT APIs for mobile/web integrations, boosting reliability and security by 25%. Created React.js/TypeScript dashboards for transaction monitoring, reducing manual ops by 20%. Scaled high-concurrency modules with Kafka, Redis, and MongoDB, supporting 1M+ concurrent sessions. Systematized deployments with Docker, Kubernetes, and Terraform, achieving 99.9% uptime. Mentored 3 junior engineers, conducting code reviews and guiding them on microservices best practices and CI/CD pipelines.
Java Developer at Cybage Software India
November 1, 2018 - November 1, 2018Migrated legacy healthcare apps into modular Spring Boot REST services, enabling third-party API integrations. Developed reusable Java backend libraries, cutting duplicate coding across 3+ projects. Optimized asynchronous workflows with Kafka, reducing peak-load API bottlenecks by 25%. Mechanized SQL ETL pipelines, improving billing accuracy and reporting efficiency. Guided interns on Java REST API development and database performance tuning.
Software Developer at Hexaware Technologies
June 1, 2023 - June 1, 2023Expanded e-commerce microservices using Java, Spring Boot, and Spring Cloud, improving transaction speed by 40%. Developed secure OAuth2/JWT APIs for mobile/web integrations, boosting reliability and security by 25%. Created React.js/TypeScript dashboards for transaction monitoring, reducing manual ops by 20%. Scaled high-concurrency modules with Kafka, Redis, and MongoDB, supporting 1M+ concurrent sessions. Systematized deployments with Docker, Kubernetes, and Terraform, achieving 99.9% uptime. Mentored 3 junior engineers, conducting code reviews and guiding best practices in microservices and CI/CD.
Java Developer at Cybage Software
November 1, 2018 - November 1, 2018Migrated legacy healthcare apps into modular Spring Boot REST services to enable third-party API integrations. Developed reusable Java backend libraries, cutting duplicate coding across 3+ projects. Optimized asynchronous workflows with Kafka, reducing peak-load API bottlenecks by 25%. Mechanized SQL ETL pipelines, improving billing accuracy and reporting efficiency. Guided interns on Java REST API development and database performance tuning.
Software Engineer at Capital One
December 1, 2024 - May 1, 2025Supported the development of cloud-native microservices using Java, Spring Boot, AWS Lambda, and SQS; built full-stack modules with React.js and TypeScript; contributed to CI/CD pipelines with GitHub Actions, Jenkins, and Terraform; assisted in query optimization and Elasticsearch index tuning, reducing fraud-detection query latency from 700ms to under 200ms; explored Generative AI-powered knowledge assistants using OpenAI APIs and LangChain to improve onboarding and documentation.
Software Developer at Hexaware Technologies
December 1, 2018 - June 1, 2023Expanded e-commerce microservices using Java, Spring Boot, and Spring Cloud; developed secure OAuth2/JWT APIs for mobile/web integrations; created React.js/TypeScript dashboards for transaction monitoring; scaled high-concurrency modules with Kafka, Redis, and MongoDB; automated deployments with Docker, Kubernetes, and Terraform; mentored 3 junior engineers.
Java Developer at Cybage Software
December 1, 2015 - November 1, 2018Migrated legacy healthcare apps into modular Spring Boot REST services; developed reusable Java backend libraries; optimized asynchronous workflows with Kafka; mechanized SQL ETL pipelines; guided interns on Java REST API development and database performance tuning.
Education
Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Masters in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Master of Science in Computer Science at Illinois Institute of Technology
January 11, 2030 - May 1, 2025Qualifications
Industry Experience
Financial Services, Retail, Healthcare, Software & Internet, Professional Services
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Hire a Programmer
We have the best programmer experts on Twine. Hire a programmer in Chicago today.