Sehaj Preet

I build full-stack web apps and AI-powered products.

From sleek frontends to scalable backends and LLM integrations.

I design • code • deploy.

I love designing and building thoughtful, production-grade applications.

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Vero preview

Vero

Startup

The AI-native writing workspace for resumes and technical documents. LaTeX editor, inline AI editing, professional templates, and real-time ATS scoring — all in one place.

Building

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Genomics AI preview

Genomics AI

AI-powered genetic variant analysis platform using Evo 2 genomic language model to predict mutation pathogenicity with GPU-accelerated inference.

All Systems Operational

Experiences

Powerplay
Powerplay

Backend Intern

Feb 2026 – Mar 2026
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Bengaluru, India (Onsite)

  • Refactored excel export architecture from offset pagination to MongoDB streaming, processing 100K+ records under 2 minutes (previously 7+ minutes) with significant memory reduction.
MongoDB
AWS
React
Express
Node.js
JavaScript
Perf
Perf

Software Engineering Intern

Sep 2025 – Jan 2026
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London, UK (Remote)

  • Engineered 15+ production features using the MERN stack (MongoDB, Express.js, React.js, Node.js) across a codebase serving 1000s of active users.
  • Wrote unit tests and participated in code reviews to maintain high code quality and release confidence.
  • Orchestrated 25+ production deployments via AWS Amplify and Elastic Beanstalk, implementing CI/CD best practices and maintaining 99.9% uptime across staging and production environments.
MongoDB
Express
React
Node.js
Next.js
TypeScript
RAG
LangChain
AWS
Reslink Technologies
Reslink Technologies

Software Engineering Intern

Jun 2025 – Sep 2025
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Delhi, India (Hybrid)

  • Improved dashboard initial load time by 15% through lazy loading, component memoization, and API response caching.
  • Delivered 6+ feature releases on schedule across a production environment while maintaining release stability.
  • Developed a full-stack solar panel design tool using Three.js, Next.js, and TypeScript with object-oriented design patterns to render real-time 3D models across 5+ panel configurations with sub-2s load performance.
Three.js
Canvas API
Next.js
TypeScript

Proof Of Work

I live spending time in open source,building real stuff and solving real problems

Pull Requests

All pull requests

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Skills

I love working with these technologies to build beautiful and functional applications.

JavaScript
TypeScript
React
NextJs
Express
Nodejs
MongoDB
Python
FastAPI
Langchain
Langgraph
RAG
Gemini API
Socket.io
Postgres
Prisma
Supabase
Cloudflare
Tailwind CSS
Framer Motion
Vite
Three.js
C
Docker
Kubernetes
AWS
Git

Get in touch

Hi there — I’m currently open to meaningful work.