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I'm a Senior Software Engineer with 6+ years of experience building high-frequency financial and diagnostic systems. I optimize transaction processing to handle loads beyond 10,000 transactions per second and modernize legacy monoliths into cloud-native microservices on AWS and Azure. I’ve implemented event-driven architectures with Kafka and used Docker/Kubernetes to reduce deployment cycles from hours to minutes. I’m proficient in the modern Java ecosystem (Java 8 to Java 21), with a focus on low-latency, memory-efficient backend services, concurrency (including virtual threads), and reactive programming with Spring Boot 3. I also contribute as a versatile full-stack engineer with experience in Angular and React, crafting responsive interfaces with HTML5, CSS3, and TypeScript. I champion shift-left quality, contract testing with Pact, and strong CI/CD pipelines to maintain 99.9% production reliability while ensuring security and HIPAA-compliant data handling.…I'm a Senior Software Engineer with 6+ years of experience building high-frequency financial and diagnostic systems. I optimize transaction processing to handle loads beyond 10,000 transactions per second and modernize legacy monoliths into cloud-native microservices on AWS and Azure. I’ve implemented event-driven architectures with Kafka and used Docker/Kubernetes to reduce deployment cycles from hours to minutes. I’m proficient in the modern Java ecosystem (Java 8 to Java 21), with a focus on low-latency, memory-efficient backend services, concurrency (including virtual threads), and reactive programming with Spring Boot 3. I also contribute as a versatile full-stack engineer with experience in Angular and React, crafting responsive interfaces with HTML5, CSS3, and TypeScript. I champion shift-left quality, contract testing with Pact, and strong CI/CD pipelines to maintain 99.9% production reliability while ensuring security and HIPAA-compliant data handling.

Venkata Sai Susanth Gunda

Full Stack Developer, Back-End Developer, Web Developer, +4

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I'm a Senior Software Engineer with 6+ years of experience building high-frequency financial and diagnostic systems. I optimize transaction processing to handle loads beyond 10,000 transactions per second and modernize legacy monoliths into cloud-native microservices on AWS and Azure. I’ve implemented event-driven architectures with Kafka and used Docker/Kubernetes to reduce deployment cycles from hours to minutes. I’m proficient in the modern Java ecosystem (Java 8 to Java 21), with a focus on low-latency, memory-efficient backend services, concurrency (including virtual threads), and reactive programming with Spring Boot 3. I also contribute as a versatile full-stack engineer with experience in Angular and React, crafting responsive interfaces with HTML5, CSS3, and TypeScript. I champion shift-left quality, contract testing with Pact, and strong CI/CD pipelines to maintain 99.9% production reliability while ensuring security and HIPAA-compliant data handling.…I'm a Senior Software Engineer with 6+ years of experience building high-frequency financial and diagnostic systems. I optimize transaction processing to handle loads beyond 10,000 transactions per second and modernize legacy monoliths into cloud-native microservices on AWS and Azure. I’ve implemented event-driven architectures with Kafka and used Docker/Kubernetes to reduce deployment cycles from hours to minutes. I’m proficient in the modern Java ecosystem (Java 8 to Java 21), with a focus on low-latency, memory-efficient backend services, concurrency (including virtual threads), and reactive programming with Spring Boot 3. I also contribute as a versatile full-stack engineer with experience in Angular and React, crafting responsive interfaces with HTML5, CSS3, and TypeScript. I champion shift-left quality, contract testing with Pact, and strong CI/CD pipelines to maintain 99.9% production reliability while ensuring security and HIPAA-compliant data handling.

Available to hire

I’m a Senior Software Engineer with 6+ years of experience building high-frequency financial and diagnostic systems. I optimize transaction processing to handle loads beyond 10,000 transactions per second and modernize legacy monoliths into cloud-native microservices on AWS and Azure. I’ve implemented event-driven architectures with Kafka and used Docker/Kubernetes to reduce deployment cycles from hours to minutes.

I’m proficient in the modern Java ecosystem (Java 8 to Java 21), with a focus on low-latency, memory-efficient backend services, concurrency (including virtual threads), and reactive programming with Spring Boot 3. I also contribute as a versatile full-stack engineer with experience in Angular and React, crafting responsive interfaces with HTML5, CSS3, and TypeScript. I champion shift-left quality, contract testing with Pact, and strong CI/CD pipelines to maintain 99.9% production reliability while ensuring security and HIPAA-compliant data handling.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Javanese

Fluent

English

Fluent

Work Experience

Software Engineer II at Toyota Financial Services

April 1, 2024 - October 29, 2025

Designed and developed back-end microservices using Java and Spring Boot, providing RESTful, gRPC, and SOAP APIs for integration with enterprise systems and an Angular 16 front-end. Optimized legacy service layers, boosting performance by 30% for systems processing 10,000+ transactions per second. Enhanced data persistence and transaction management in Hibernate/JPA, cutting average API latency by 20% and eliminating deadlocks in high-concurrency environments. Engineered and orchestrated 12+ resilient microservices using Kubernetes, implementing fault tolerance strategies to guarantee system resilience and reliability. Established comprehensive end-to-end automation strategies using Playwright, achieving 85%+ UI test coverage for critical workflows and integrating them into the CI/CD pipeline. Established application-level security gateways using Spring Security and OAuth 2.0 to enforce RBAC rules, successfully securing 4 customer-facing applications utilized by 50,000+ users. Drove cr

Software Engineer at Heartflow

March 31, 2024 - March 31, 2024

Designed and implemented scalable full-stack services with Java and Spring Boot on the backend, and built responsive user interfaces using React and Next.js. Developed high-performance core business logic in Kotlin, capable of processing complex cardiovascular diagnostic models under 500 ms per request. Implemented distributed caching strategies (Redis) to offload database reads, reducing database utilization by 35% during peak traffic hours. Implemented robust contract-testing frameworks (Pact/Spring Cloud Contract) for microservices, increasing integration reliability for 5 downstream teams by 40% and preventing deployment failures. Engineered a highly available data processing solution, ensuring secure, HIPAA-compliant storage of 10+ million patient medical images via scalable storage services. Executed the integration of 4 critical external vendor APIs, designing a highly resilient, serverless event-driven architecture to process 100,000+ imaging datasets per month. Ensured 100% HI

Software Engineer at Cognizant Technology Solutions

July 31, 2022 - July 31, 2022

Developed and maintained enterprise-grade full-stack web applications using Java/Spring Boot and Angular, establishing a dedicated Kafka data pipeline to process 500,000+ financial transactions daily (Event-Driven Systems focus). Transformed 2 legacy Java/J2EE monolithic applications into cloud-native microservices architectures, resulting in a 60% reduction in deployment time and a 40% decrease in system complexity. Managed deployment and release cycles across multiple cloud environments, ensuring consistent operational quality. Established and enforced API contract governance using OpenAPI/Swagger for all GraphQL and RESTful services, increasing integration reliability for 5 downstream teams. Developed and maintained complex JIRA dashboards using advanced JQL to provide real-time visibility into project progress, team velocity, and bug-tracking metrics for stakeholders. Managed the full SDLC within JIRA by designing and implementing custom workflows, screen schemes, and fields to ali

Software Engineer Intern at Kotak Mahindra Bank

June 30, 2019 - June 30, 2019

Developed and optimized banking software modules using Java/Spring Boot, including PL/SQL routines and stored procedures on an Oracle database, to enhance core business logic performance on Azure. Implemented and integrated RESTful APIs to enable secure, reliable, and scalable data exchange across microservice-based architectures. Built and enhanced front-end components with HTML5, seamlessly integrating them with backend APIs to deliver user-centric features. Drove code quality by implementing a Test-Driven Development approach, achieving 95% unit test coverage (JUnit) and accelerating the QA cycle. Actively participated in Agile (Scrum) ceremonies by tracking user stories, tasks, and defects in JIRA, ensuring alignment with sprint goals.

Software Engineer II at Toyota Financial Services

April 1, 2024 - November 24, 2025

Designed and engineered new Java 21 microservices with Spring Boot, exposing RESTful, gRPC, and SOAP APIs to support high-volume enterprise systems. Optimized legacy service layers to scale beyond 10,000 TPS by refactoring persistence (Hibernate/JPA), tuning complex SQL queries, and implementing Redis-based distributed caching. Developed AI-powered risk assessment microservices processing real-time transaction data in JSON/XML and flagging fraudulent patterns. Orchestrated the deployment of 12+ containerized services on Kubernetes (EKS) with fault-tolerance patterns. Managed configurations with Spring Cloud Config and Kubernetes ConfigMaps. Implemented RBAC-secured access via Spring Security and OAuth 2.0. Established TDD with JUnit/Mockito and automated Playwright UI tests, integrated into CI/CD pipelines.

Software Engineer at Heartflow

March 1, 2024 - March 1, 2024

Built scalable full-stack services (Java 17/Spring Boot) and responsive UIs (React) delivering end-to-end diagnostic modeling capabilities. Contributed to backend for Heartflow FFRct Analysis, supporting AI-driven workflows (deep learning, CFD) and rendering 3D cardiovascular models. Implemented high-performance core logic under 500 ms per request and introduced a Redis caching strategy to alleviate DB contention. Led Pact contract testing to stabilize API integrations with downstream teams. Architected HIPAA-compliant data solutions (AWS S3, RDS) for secure, scalable patient data storage and querying. Implemented a serverless event-driven integration with external vendor APIs handling 100,000+ imaging datasets monthly. Automated Jenkins-based CI/CD pipelines (Maven/Docker), reducing deployment times from hours to under 10 minutes.

Software Engineer at Cognizant Technology Solutions

July 1, 2022 - July 1, 2022

Engineered enterprise full-stack applications (Java/Spring Boot, Angular) and established a resilient Kafka-based data pipeline processing 500,000+ transactions daily. Re-architected two monolithic apps into cloud-native microservices, reducing deployment complexity. Worked on AWS/Azure deployments, authored Jenkins files and automation scripts, and managed API contracts (Swagger) for REST/GraphQL services. Enhanced stakeholder visibility with JQL-driven dashboards to monitor progress, velocity, and defects.

Software Engineer Intern at Kotak Mahindra Bank

June 1, 2019 - June 1, 2019

Contributed to core banking modules (Java/Spring Boot, PL/SQL) on Azure, optimizing business logic performance. Implemented RESTful APIs for secure data exchange within a microservice architecture. Applied TDD with JUnit to improve unit test coverage and code quality. Participated in Agile ceremonies (JIRA) to align with sprint goals.