2+ years of experience
LangChain · LangGraph
From AI to Full Stack — let's create something amazing together!
About
●I build AI systems that are reliable, cost-efficient, and ready for the real world.
●From LLM pipelines to full stack delivery — I own the entire product, end-to-end.
●Based in Bangladesh, CEST-aligned — available for both European and US teams.
LangChain · LangGraph · RAG Pipelines · Vector Search · LLM APIs · Agentic Memory
JavaScript · TypeScript · Python · Node.js · SQL · REST APIs · GraphQL · Git · Docker · CI/CD
React · Next.js · React Native · Expo · Tailwind CSS · MUI · Redux Toolkit · Zustand · Firebase
Express.js · FastAPI · Nest.js · MongoDB · PostgreSQL · Prisma · Supabase · Redis · Jest
Works
Lead Engineer & Sole Developer · Production App
A production AI-powered financial assistant — live on App Store and Play Store. Built solo from scratch, featuring LLM agents, agentic memory architecture, RAG pipelines, and SSE streaming, with ~97% token cost reduction and 2.5x faster response times.
Tech StackReact Native · Next.js · TypeScript · Node.js · Express.js · PostgreSQL · Prisma · LangChain · LangGraph
Creator & Maintainer · Open Source
An open source CLI toolchain for Node.js backends — scaffold Express, Fastify, or Django projects and add pre-configured utilities like Prisma, Mongoose, ESLint, and auth files in one command. Cuts new project setup from ~2 hours to under 10 minutes
Tech StackNode.js · TypeScript · Docker · GitHub Actions · Next.js · Tailwind CSS · Next MDX Remote
Full-Stack Developer · Side Project
A full-stack tech news platform where users browse articles, purchase premium memberships via Stripe, and manage their own posts. Features JWT auth, MongoDB aggregation pipelines, and a dedicated admin dashboard for content management.
Tech StackReact · TypeScript · Tailwind CSS · Firebase · Node.js · Express.js · MongoDB · Stripe
Experience
Stockholm, Sweden (Remote)
Designed and shipped the full AI infrastructure for a production finance app — LLM-powered agents and RAG pipelines via LangChain and LangGraph, a session-scoped agentic memory system that cut token costs by 97% (15,000 → 450 tokens per message), and SSE streaming that reduced time-to-first-content by 2.5x and total response time by ~60%.
Owned the entire product as the sole engineer — architecture, backend APIs, database design, mobile and web delivery, and deployment. Implemented prompt caching cutting API costs by ~90%, and drove Lighthouse performance from 64 → 96. The app is live on App Store and Play Store.
Stockholm, Sweden (Remote)
Built a full-featured internal job-search platform from scratch with React, TypeScript, and MUI — used daily by 20+ employees. Prioritized performance from day one, bringing page load times down by 30%.
Engineered a secure Node.js/Express backend hardened with Helmet, CORS, and rate limiting, and built a real-time internal messaging system using Firebase/Firestore — maintaining 99.9% uptime in production.
Dhaka, Bangladesh (Remote)
Rebuilt the company's frontend in React with a sharp focus on performance — delivering a 20% improvement in load times and a smoother experience across all devices.
Went beyond the UI by standardizing deployment scripts and introducing infrastructure monitoring — reducing hosting incidents by 75% and achieving consistent 98% uptime.
Testimonials
As our Software Engineer, Rashedin has been building Aivinn with me from day one, often from scratch, with no roadmap to follow. He's the rare combination of genuinely skilled and completely reliable: clean work, clear communication, always there when it counts, even across time zones.
CEO & Founder, Aivinn
Rashedin proved to be a highly skilled and dedicated Frontend Developer. He played a crucial role in building and enhancing our company's website while also contributing to the development of frontend websites for our clients. His keen eye for design, problem-solving abilities, and strong technical expertise made a significant impact on our projects. His commitment to delivering high-quality work and his ability to adapt quickly to new challenges make him an asset to any team.
CEO, Creative Hub IT Agency
A true hard-working developer who learns quickly and adapts to change. I highly recommend him!
CTO, Aivinn | CEO, Carmy
I admire how Rashedin remains calm and professional under pressure. He consistently delivers quality work and meets deadlines reliably.
Product Manager, AR Technologies
I highly recommend Rashedin. He is skilled in building efficient and scalable apps using modern tech stack. He would be a great asset to any team!
Software Engineer, Iqra Wave
During his internship, Rashedin consistently impressed our team with his technical skills, professionalism, and commitment to learning. He made significant contributions to both front-end and back-end components of several projects. His ability to collaborate across departments and take initiative in problem-solving made him a valuable asset to our development team. I am confident that Rashedin will excel in any future role he undertakes. I strongly recommend him for any opportunity that aligns with his skills and interests.
CEO, Coursfy | CTO, Workmatch
I worked with Rashedin during his internship and was consistently impressed by his dedication and growth. He built an internal job search platform including real-time chat features. He communicates clearly, learns fast, and I'm confident he'll be a strong asset wherever he goes.
Founder & Lead Developer, Digiwinners
Contact