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I am Daniel Stephen Raj Selvam, a results-driven Full Stack Developer with 10+ years of experience building high-performance, low-latency web applications for Singapore’s financial and healthcare sectors. I specialize in React and TypeScript on the front end, and .NET 8 / C# on the back end, delivering scalable systems that power internal teams and customers. Currently I lead projects at GIC, designing investment-grade web applications and integrating real-time data streams with REST APIs hosted on AWS. I apply Clean Architecture (Mediator Pattern) and rigorous unit testing to keep code quality high, reduce incidents, and accelerate delivery within regulated, high-availability environments. I’m comfortable with CI/CD, Docker/Kubernetes, and Agile practices, and I value collaboration across cross-functional teams.…I am Daniel Stephen Raj Selvam, a results-driven Full Stack Developer with 10+ years of experience building high-performance, low-latency web applications for Singapore’s financial and healthcare sectors. I specialize in React and TypeScript on the front end, and .NET 8 / C# on the back end, delivering scalable systems that power internal teams and customers. Currently I lead projects at GIC, designing investment-grade web applications and integrating real-time data streams with REST APIs hosted on AWS. I apply Clean Architecture (Mediator Pattern) and rigorous unit testing to keep code quality high, reduce incidents, and accelerate delivery within regulated, high-availability environments. I’m comfortable with CI/CD, Docker/Kubernetes, and Agile practices, and I value collaboration across cross-functional teams.

Daniel Stephen Raj Selvam

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I am Daniel Stephen Raj Selvam, a results-driven Full Stack Developer with 10+ years of experience building high-performance, low-latency web applications for Singapore’s financial and healthcare sectors. I specialize in React and TypeScript on the front end, and .NET 8 / C# on the back end, delivering scalable systems that power internal teams and customers. Currently I lead projects at GIC, designing investment-grade web applications and integrating real-time data streams with REST APIs hosted on AWS. I apply Clean Architecture (Mediator Pattern) and rigorous unit testing to keep code quality high, reduce incidents, and accelerate delivery within regulated, high-availability environments. I’m comfortable with CI/CD, Docker/Kubernetes, and Agile practices, and I value collaboration across cross-functional teams.…I am Daniel Stephen Raj Selvam, a results-driven Full Stack Developer with 10+ years of experience building high-performance, low-latency web applications for Singapore’s financial and healthcare sectors. I specialize in React and TypeScript on the front end, and .NET 8 / C# on the back end, delivering scalable systems that power internal teams and customers. Currently I lead projects at GIC, designing investment-grade web applications and integrating real-time data streams with REST APIs hosted on AWS. I apply Clean Architecture (Mediator Pattern) and rigorous unit testing to keep code quality high, reduce incidents, and accelerate delivery within regulated, high-availability environments. I’m comfortable with CI/CD, Docker/Kubernetes, and Agile practices, and I value collaboration across cross-functional teams.

Available to hire

I am Daniel Stephen Raj Selvam, a results-driven Full Stack Developer with 10+ years of experience building high-performance, low-latency web applications for Singapore’s financial and healthcare sectors. I specialize in React and TypeScript on the front end, and .NET 8 / C# on the back end, delivering scalable systems that power internal teams and customers.

Currently I lead projects at GIC, designing investment-grade web applications and integrating real-time data streams with REST APIs hosted on AWS. I apply Clean Architecture (Mediator Pattern) and rigorous unit testing to keep code quality high, reduce incidents, and accelerate delivery within regulated, high-availability environments. I’m comfortable with CI/CD, Docker/Kubernetes, and Agile practices, and I value collaboration across cross-functional teams.

Skills

Experience Level

Expert

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Expert

Language

English

Advanced

Tamil

Fluent

Work Experience

Full Stack Developer at Government of Singapore Investment Corporation (GIC)

June 1, 2022 - Present

Lead full stack engineer on a greenfield investment management web application for GIC — ownership of React/TypeScript front end and AWS-powered back end; designed a scalable SPA for 500+ internal users; designed and exposed RESTful APIs via AWS Lambda + API Gateway; applied Clean Architecture with the Mediator Pattern to produce modular, reusable back-end services; implemented xUnit test suites achieving 80–90% code coverage and contributing to a 90% reduction in production incidents; integrated SharePoint O365 for automated document management; designed PostgreSQL schemas and Flyway migrations for zero-downtime deployments; established CI/CD pipelines (GitHub Actions / Azure DevOps).

Senior Full Stack Developer at Tata Consultancy Services (TCS)

August 1, 2021 - June 1, 2022

Senior developer in a US banking team building a customer-facing servicing and benefits platform. Delivered feature enhancements for an Angular + .NET Core banking application serving thousands of US customers with 99.9% uptime; led requirement gatherings with US stakeholders; mentored 3 junior developers and enforced coding standards and code reviews; built and deployed features using .NET Core, Angular, and Node.js on Azure DevOps and GitHub within an Agile sprint cadence.

Project Associate at Cognizant Technology Solutions (CTS)

June 1, 2019 - August 1, 2021

Developer on a US healthcare ERA/EFT platform handling policy validation, banking transfers, and data routing across providers and insurers. Designed and built REST APIs, Windows services, and web services for healthcare data processing; optimized critical SQL Server queries and batch jobs; managed environment deployments across SIT, QA, and production to support zero-defect releases; ensured cross-browser compatibility and UI reliability, reducing browser-specific defects.