Open to opportunities

JAY KUMAR

@jaykumar3

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Senior full stack architect building enterprise SaaS with .NET, React, Angular, and cloud microservices.

United States

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What I'm looking for

I’m looking to lead full-stack, cloud-native teams building enterprise microservices SaaS, owning architecture, CI/CD, performance tuning, and AI/ML features—delivering end-to-end products with high reliability and measurable impact.

I’m a Senior Full Stack Engineer and Technical Lead with 15+ years designing, developing, and scaling enterprise-grade SaaS across fintech, healthcare, and e-commerce. My core strengths are .NET (C# / ASP.NET Core) with React and Angular, backed by cloud-native architecture on Azure and AWS.

I lead teams and drive end-to-end delivery—architecting microservices with DDD, CQRS, and Clean Architecture; building RESTful APIs, real-time features (SignalR/WebSockets), and AI/ML-driven services. In my recent work, I improved frontend performance and integrated ML features, increasing user engagement by 25%, while reducing API latency by 30% through query optimization, Redis caching, and async processing.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Architect

Current

Technology Rivers

Oct 2021 - Present (4 years 8 months)

Led a team of 5+ engineers delivering enterprise-grade SaaS using ASP.NET Core, React, and Angular, and architected scalable microservices with DDD, CQRS, and Clean Architecture. Increased user engagement by 25% and reduced API latency by 30% through Redis caching, async processing, and query optimization, while building Azure-native solutions and CI/CD pipelines.

ASP.NET Core React Angular Microservices Architecture CQRS REST APIs Azure Redis Azure Pipelines

Senior Full Stack Engineer

Microsoft

Oct 2017 - Sep 2021 (3 years 11 months)

Developed scalable enterprise applications using ASP.NET Core, React, and Angular, designing REST APIs and contributing to microservices architecture to improve modularity and scalability. Integrated AI/ML services, enhanced performance with Redis caching and query optimization, and achieved 90%+ test coverage while contributing to CI/CD automation.

ASP.NET Core React Angular TypeScript Microservices REST APIs Redis AI ML Integration

Senior Full Stack Developer

Evernote

Apr 2014 - Sep 2017 (3 years 5 months)

Built full stack SaaS and fintech capabilities using ASP.NET, Node.js, Python, and React, including REST API development and early AI/ML predictive analytics features. Implemented asynchronous services to improve responsiveness and throughput, and improved uptime/reliability through monitoring and deployment automation.

ASP.NET Node Python React REST APIs Docker Performance Optimization

Full Stack Developer

Evernote

Jul 2010 - Mar 2014 (3 years 8 months)

Developed full stack web applications with modern frontend frameworks and backend services, designing REST APIs and database schemas across SQL and NoSQL. Implemented authentication and role-based access control, improved performance with Redis caching, and delivered scalable features through cross-functional collaboration.

Frontend Backend Services REST APIs NoSQL Redis Performance Tuning Data Modeling