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Full-stack developer building end-to-end SaaS products—from React/TypeScript frontends to Node/Express and Django/PDF services with PostgreSQL and real-time collaboration. Experienced in performance tuning, API optimization, and production-grade system design. I’ve worked on role-based SaaS workflows with JWT auth, WebSockets-based collaboration, and database design including PostgreSQL RLS and state machines. I enjoy shipping clean APIs, writing reliable services, and integrating AI assistance grounded in users’ own codebases.…Full-stack developer building end-to-end SaaS products—from React/TypeScript frontends to Node/Express and Django/PDF services with PostgreSQL and real-time collaboration. Experienced in performance tuning, API optimization, and production-grade system design. I’ve worked on role-based SaaS workflows with JWT auth, WebSockets-based collaboration, and database design including PostgreSQL RLS and state machines. I enjoy shipping clean APIs, writing reliable services, and integrating AI assistance grounded in users’ own codebases.

ATEESH KUMAR

Full Stack Developer, Back-End Developer, Web Developer, +3

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Full-stack developer building end-to-end SaaS products—from React/TypeScript frontends to Node/Express and Django/PDF services with PostgreSQL and real-time collaboration. Experienced in performance tuning, API optimization, and production-grade system design. I’ve worked on role-based SaaS workflows with JWT auth, WebSockets-based collaboration, and database design including PostgreSQL RLS and state machines. I enjoy shipping clean APIs, writing reliable services, and integrating AI assistance grounded in users’ own codebases.…Full-stack developer building end-to-end SaaS products—from React/TypeScript frontends to Node/Express and Django/PDF services with PostgreSQL and real-time collaboration. Experienced in performance tuning, API optimization, and production-grade system design. I’ve worked on role-based SaaS workflows with JWT auth, WebSockets-based collaboration, and database design including PostgreSQL RLS and state machines. I enjoy shipping clean APIs, writing reliable services, and integrating AI assistance grounded in users’ own codebases.

Available to hire

Full-stack developer building end-to-end SaaS products—from React/TypeScript frontends to Node/Express and Django/PDF services with PostgreSQL and real-time collaboration. Experienced in performance tuning, API optimization, and production-grade system design.

I’ve worked on role-based SaaS workflows with JWT auth, WebSockets-based collaboration, and database design including PostgreSQL RLS and state machines. I enjoy shipping clean APIs, writing reliable services, and integrating AI assistance grounded in users’ own codebases.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Beginner

Language

Javanese

Advanced

Work Experience

Full Stack Developer at Sealstone (UK-based Startup)

March 1, 2024 - Present

Shipped end-to-end features for a customer-facing SaaS product for UK markets, owning React/TypeScript UI, C#/.NET REST APIs, and PostgreSQL schema design. Improved API response times by 40% on high-traffic endpoints using Redis caching, removing N+1 queries, and tuning slow PostgreSQL queries. Built real-time collaboration features using WebSockets to replace polling and improve UX for active users.

Full Stack Developer at SEALSTONE

March 1, 2024 - Present

Developed scalable full-stack features using React (TypeScript), C#, and WebSockets for production SaaS applications. Designed and implemented RESTful APIs with a focus on performance, security, and long-term maintainability. Applied modular architecture and type-safe coding practices to ensure codebase scalability across multiple teams. Collaborated with cross-functional remote teams following Agile workflows and Git-based version control (PR reviews, branching strategies).

Backend Developer (Freelance) at LOGIXHUNT

January 1, 2024 - March 1, 2024

Developed backend services and REST APIs using Node.js and Express.js for a UK-based client. Integrated MongoDB for data persistence and optimized database queries to improve response times. Coordinated with frontend developers to align API contracts and data models with UI requirements.

Software Engineering (Industrial Training) at Wipro

May 1, 2023 - September 30, 2023

Built and deployed Java/Spring Boot microservices for an enterprise client product, owning multiple modules end-to-end alongside senior engineers. Worked in an Agile/Scrum environment with unit testing, CI/CD pipelines, peer code reviews, and sprint-based delivery.

Full Stack Developer Intern at Wipro

May 1, 2023 - September 1, 2023

Contributed to full-stack development using Java and Spring Boot for enterprise-level application modules. Assisted in building, testing, and maintaining production application features within a large engineering team. Gained hands-on experience with professional Agile workflows, code reviews, and deployment pipelines.