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I am a backend-focused full stack engineer with strong expertise in Python, FastAPI, React, Next.js, Node.js, and NestJS. I specialize in designing scalable, high-performance applications and bridging backend logic, APIs, and modern UIs. I have hands-on experience with real-time systems using WebSockets and SSE, containerization with Docker and Kubernetes, and cloud deployment on AWS. I’ve also worked on projects involving LLM integrations and data-driven pipelines to enable AI-assisted automation within existing architectures.…I am a backend-focused full stack engineer with strong expertise in Python, FastAPI, React, Next.js, Node.js, and NestJS. I specialize in designing scalable, high-performance applications and bridging backend logic, APIs, and modern UIs. I have hands-on experience with real-time systems using WebSockets and SSE, containerization with Docker and Kubernetes, and cloud deployment on AWS. I’ve also worked on projects involving LLM integrations and data-driven pipelines to enable AI-assisted automation within existing architectures.

Rajneesh Kumar

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

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I am a backend-focused full stack engineer with strong expertise in Python, FastAPI, React, Next.js, Node.js, and NestJS. I specialize in designing scalable, high-performance applications and bridging backend logic, APIs, and modern UIs. I have hands-on experience with real-time systems using WebSockets and SSE, containerization with Docker and Kubernetes, and cloud deployment on AWS. I’ve also worked on projects involving LLM integrations and data-driven pipelines to enable AI-assisted automation within existing architectures.…I am a backend-focused full stack engineer with strong expertise in Python, FastAPI, React, Next.js, Node.js, and NestJS. I specialize in designing scalable, high-performance applications and bridging backend logic, APIs, and modern UIs. I have hands-on experience with real-time systems using WebSockets and SSE, containerization with Docker and Kubernetes, and cloud deployment on AWS. I’ve also worked on projects involving LLM integrations and data-driven pipelines to enable AI-assisted automation within existing architectures.

Available to hire

I am a backend-focused full stack engineer with strong expertise in Python, FastAPI, React, Next.js, Node.js, and NestJS.

I specialize in designing scalable, high-performance applications and bridging backend logic, APIs, and modern UIs. I have hands-on experience with real-time systems using WebSockets and SSE, containerization with Docker and Kubernetes, and cloud deployment on AWS. I’ve also worked on projects involving LLM integrations and data-driven pipelines to enable AI-assisted automation within existing architectures.

Skills

Experience Level

Expert

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Intermediate

Work Experience

Full Stack Developer at Vortex Bizlink Pvt. Ltd.

February 1, 2021 - Present

Designed and implemented scalable ML and backend pipelines using Python, FastAPI, and TensorFlow. Developed and deployed RESTful and GraphQL APIs with JWT/OAuth2 authentication. Managed real-time data streams using WebSockets and Server-Sent Events (SSE). Containerized applications with Docker and orchestrated deployments via AWS ECS. Integrated LLM-based tools for intelligent data processing and search. Implemented Redis caching and optimized SQL queries for improved performance. Led sprint planning, conducted code reviews, and mentored developers on backend and cloud best practices.

Software Developer at LAS Consulting

August 1, 2016 - January 1, 2021

Built internal business applications using Angular, .NET Core, and SQL Server. Delivered full-cycle development including API design, debugging, and deployment. Improved CI/CD pipelines and automated builds across environments. Collaborated cross-functionally in Agile sprints and managed production releases.