Isha Singh

Full Stack Developer (MERN) | RESTful APIs | Generative AI | RAG | JWT/OAuth 2.0 | React.js | Node.js | MongoDB | Freelancing on Fiverr

Greater Delhi Area

About

Full Stack Developer with 1 year of freelance experience building production-grade MERN stack applications, RESTful APIs, and Generative AI integrations. I've worked with 5+ clients on Fiverr, delivering 10+ APIs with 30% performance improvements and 99.9% uptime. I specialize in building secure, scalable systems β€” from backend architecture and JWT/OAuth 2.0 authentication to real-time WebSocket systems and RAG-powered LLM pipelines. Here's what I bring to the table: πŸ”ΉFull Stack Development β€” React.js, Node.js, Express.js, MongoDB (MERN) πŸ”Ή API Design β€” RESTful APIs, RBAC, MVC Architecture, API Security πŸ”Ή Generative AI β€” RAG pipelines, Gemini API, GROQ (LLaMA 3.3), Vector Embeddings πŸ”Ή Real-Time Systems β€” Socket.IO, WebSockets πŸ”Ή Cloud Deployment β€” Render, Vercel, AWS, CI/CD Projects I've built: β†’ Aura AI β€” AI assistant with persistent memory using RAG + Gemini 2.0 β†’ CraveScroll β€” Full-stack food reels platform (social media style) β†’ SnapScript β€” AI-powered social media caption generator Currently pursuing BCA at Mangalayatan University while actively freelancing and building real-world products. πŸ“© Open to full-time roles, internships, and collaborations. πŸ“ Portfolio: https://t.co/DLKSJiadBE

Experience

  • Student Trainee at Apna College
    May 2025 - Present Β· 1 yr 3 mos

    🧠My Coding journey as I officially started learning Data Structures and Algorithms (DSA) with Java from Apna College! I'm super excited to build strong problem-solving skills and level up my coding game changerπŸ’ͺπŸΌπŸ‘©πŸ»β€πŸ’»

  • Freelance Full Stack Developer at Fiverr
    Oct 2025 - Present Β· 10 mos

    Title: Freelance Full Stack Developer Company: Fiverr (Self-Employed) Location: Remote Duration: November 2025 – Present Description: Designed and deployed 10+ production-ready RESTful APIs using Node.js, Express.js, and MongoDB, reducing average response time by 30% through query optimization and caching strategies. Architected JWT and OAuth 2.0 authentication with Role-Based Access Control (RBAC) for multiple client applications, ensuring endpoint protection and data integrity across user roles. Gathered requirements from 5+ clients and delivered complete MERN stack solutions using Agile workflows, code reviews, and engineering best practices, cutting bug rate by 40%.

  • Student Trainee at Sheryians Coding School
    Jan 2025 - Jan 2026 Β· 1 yr 1 mo

    I’m currently learning my skills as a Full Stack Developer Trainee with the Job Ready AI Powered Cohort: Complete Web Development + DSA + Aptitude at Sheryians Coding School πŸŽ“ Gaining hands-on experience in :- - Full Stack Web Development πŸ” 🧠 to become job-ready. - The program includes real-world projects πŸš€, coding challenges πŸ§‘β€πŸ’», and technical interview prep πŸ’‘. - Mastering the MERN stack (MongoDB, Express, React, Node.js) πŸ’ͺ - Learning DevOps, Microservices, AI, and Progressive Web Apps (PWA) πŸŒπŸ€– - Enhancing problem-solving skills with coding challenges ⚑