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I’m a full-stack engineer with 9+ years of experience building reliable web applications and cloud-native services, and I enjoy turning slow, manual workflows into fast, automated systems. I’ve worked across the full stack—Node.js/TypeScript/React/Next.js on the frontend and backend, secure REST/GraphQL APIs, and production-grade deployments on AWS, Azure, and GCP—while improving performance, reliability, and developer experience. Recently, I’ve been building AI-driven product features, including an RAG-based recruiter assistant powered by LLMs using LangChain and Pinecone. I focus on pragmatic engineering: optimizing API latency (e.g., reducing 800ms+ responses to under 300ms), automating large-scale workflows for hundreds of thousands of users, and delivering stable releases with strong testing and maintainable architecture.…I’m a full-stack engineer with 9+ years of experience building reliable web applications and cloud-native services, and I enjoy turning slow, manual workflows into fast, automated systems. I’ve worked across the full stack—Node.js/TypeScript/React/Next.js on the frontend and backend, secure REST/GraphQL APIs, and production-grade deployments on AWS, Azure, and GCP—while improving performance, reliability, and developer experience. Recently, I’ve been building AI-driven product features, including an RAG-based recruiter assistant powered by LLMs using LangChain and Pinecone. I focus on pragmatic engineering: optimizing API latency (e.g., reducing 800ms+ responses to under 300ms), automating large-scale workflows for hundreds of thousands of users, and delivering stable releases with strong testing and maintainable architecture.

Toukir Ahmed Shuva

Full Stack Developer, Web Developer, Back-End Developer, +7

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I’m a full-stack engineer with 9+ years of experience building reliable web applications and cloud-native services, and I enjoy turning slow, manual workflows into fast, automated systems. I’ve worked across the full stack—Node.js/TypeScript/React/Next.js on the frontend and backend, secure REST/GraphQL APIs, and production-grade deployments on AWS, Azure, and GCP—while improving performance, reliability, and developer experience. Recently, I’ve been building AI-driven product features, including an RAG-based recruiter assistant powered by LLMs using LangChain and Pinecone. I focus on pragmatic engineering: optimizing API latency (e.g., reducing 800ms+ responses to under 300ms), automating large-scale workflows for hundreds of thousands of users, and delivering stable releases with strong testing and maintainable architecture.…I’m a full-stack engineer with 9+ years of experience building reliable web applications and cloud-native services, and I enjoy turning slow, manual workflows into fast, automated systems. I’ve worked across the full stack—Node.js/TypeScript/React/Next.js on the frontend and backend, secure REST/GraphQL APIs, and production-grade deployments on AWS, Azure, and GCP—while improving performance, reliability, and developer experience. Recently, I’ve been building AI-driven product features, including an RAG-based recruiter assistant powered by LLMs using LangChain and Pinecone. I focus on pragmatic engineering: optimizing API latency (e.g., reducing 800ms+ responses to under 300ms), automating large-scale workflows for hundreds of thousands of users, and delivering stable releases with strong testing and maintainable architecture.

Available to hire

I’m a full-stack engineer with 9+ years of experience building reliable web applications and cloud-native services, and I enjoy turning slow, manual workflows into fast, automated systems. I’ve worked across the full stack—Node.js/TypeScript/React/Next.js on the frontend and backend, secure REST/GraphQL APIs, and production-grade deployments on AWS, Azure, and GCP—while improving performance, reliability, and developer experience.

Recently, I’ve been building AI-driven product features, including an RAG-based recruiter assistant powered by LLMs using LangChain and Pinecone. I focus on pragmatic engineering: optimizing API latency (e.g., reducing 800ms+ responses to under 300ms), automating large-scale workflows for hundreds of thousands of users, and delivering stable releases with strong testing and maintainable architecture.

Skills

Experience Level

Expert

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Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Work Experience

Full Stack Engineer at X-team

August 1, 2021 - Present

Built a recruitment platform for candidates, partners, job postings, resume parsing, and job applications. Developed an RAG-based recruiter assistant using LLMs with LangChain and Pinecone, plus a FastAPI service to allow recruiters to search candidates and jobs in plain English. Implemented automated prioritization scoring for 200K+ candidates with scheduled sync jobs to update SendGrid marketing and remove low-priority contacts weekly. Designed daily job workflows that accept or reject 10K+ applications and send the correct email per recruitment stage, and sent weekly reminders and recommendations to 200K+ candidates. Improved email request payload success (90%+) using SendGrid templates driven by data-update events; designed MySQL schemas and REST APIs for resume parsing, candidate/application scoring, and JWT-secured RBAC endpoints with validation, rate limiting, and CORS. Shipped stable releases with TypeScript, feature flags, Jest coverage (80%+), and phased database migrations.

Full Stack Engineer (Fully Remote) at X-Team

August 1, 2021 - Present

I work on X-Team's recruitment platform, which handles candidates, partners, job positions, resume parsing, and job applications. I build both the backend and the frontend, and for the past stretch I've also been adding AI features. What I've done there: - Built a Recruiter Assistant that lets recruiters search candidates and jobs in plain English. It uses LLMs, LangChain, Pinecone, and FastAPI. I built it in Cursor with strict standards for security, scalability, and clean code, and I use AI tools for code reviews and test generation too. - Automated priority scoring for 200K+ candidates with cron jobs. It syncs updates to SendGrid Marketing and removes low-priority contacts every week. - Built a daily job that accepts or rejects 10K+ job applications and sends the right email at each stage of the hiring process. - Set up weekly reminders and job recommendations for 200K+ candidates, and added account linking for people who signed up with both email and social login. - Cut email request payloads by more than 90% using 9 SendGrid templates triggered by data-update events. - Designed the MySQL schema and REST APIs for resume parsing, candidate scoring, and applications, secured with JWT, RBAC, rate limiting, CORS, and input validation. - Shipped stable releases with 80%+ Jest coverage, TypeScript, feature flags, and phased database migrations. Skills: Node.js, TypeScript, React.js, Next.js, MySQL, Python, FastAPI, LangChain, Pinecone, SendGrid, Jest, Storybook, Cursor AI

Full Stack Engineer at Experience Digital

November 23, 2020 - July 31, 2021

I worked on Game Development Studio, a browser-based tool that lets studio users configure map-based games and generate them with Unity. I handled the backend APIs and the web app, and made sure the games got their assets quickly on mobile. What I've done there: - Built Node.js REST APIs on Firebase Cloud Functions that delivered game assets to 1,000+ Unity mobile clients, with responses around 200ms. - Set up Cloud Storage so each asset loads in under 2 seconds. - Developed the React.js and Tailwind CSS web app, with Mapbox, where studio users configure map-based games. Secured it with Firebase Authentication. - Added a discussion forum and real-time in-app notifications with Firestore and Realtime Database for 500+ active users. Skills: Node.js, TypeScript, React.js, Tailwind CSS, Mapbox, Firebase, Mocha

Full Stack Engineer at Digital (Sydney, Australia)

November 1, 2020 - July 31, 2021

Developed a game development studio: a browser-based tool for configuring map-based games and generating them with Unity. Built Node.js REST APIs on Firebase Cloud Functions to deliver game assets to 1,000+ Unity mobile clients with around 200ms responses, and configured Cloud Storage to load assets in under 2 seconds. Created a React.js + Tailwind web app with Mapbox integration for studio users to configure map-based games; secured it with Firebase Authentication. Added a discussion forum and real-time in-app notifications using Firestore and Realtime Database for 500+ active users.

Full Stack Engineer at Twisker

February 24, 2020 - November 19, 2020

I worked on Twisker, a collaborative knowledge-sharing workspace application. I worked across the backend, database, and frontend, with a lot of focus on speed and real-time features. What I've done there: - Cut API response times from 800ms+ to under 300ms by migrating the core database from MongoDB to MySQL for more efficient joins, redesigning the SQL and GraphQL schemas, and fixing N+1 queries in GraphQL resolvers. - Cut new-user creation from over a minute to under 300ms using AWS Lambda functions triggered by EventBridge after Cognito sign-up. They sync data to Aurora MySQL and Elasticsearch and resize profile images in parallel. - Built real-time collaboration with Apollo GraphQL Subscriptions and Redis presence tracking for 1,000+ concurrent users. - Deployed through a Jenkins pipeline to GKE, with 70%+ Jest coverage. Skills: Node.js, TypeScript, React.js, GraphQL, Apollo GraphQL, MongoDB, MySQL, Redis, Elasticsearch, AWS Lambda, EventBridge, Cognito, Docker, Kubernetes, Jenkins, Jest

Full Stack Engineer at Selise

February 11, 2018 - February 20, 2020

I spent two years at Selise, a Swiss software company, working on large enterprise projects in the insurance and financial services space. I built backend microservices in .NET Core and frontend workflows in Angular. What I've done there: - IGB2B: Built .NET Core microservices that linked 1,000+ insurance partner APIs, using CQRS and Event Sourcing. The system served 100K+ daily requests. - Swiss Life Select Network: Built Angular workflow forms and MongoDB dashboards for the network's advisors. - Created reusable npm packages that cut repeated feature work by 70% across the team. Skills: C#, .NET Core, Angular, MongoDB, Azure Cosmos DB, Azure Service Bus, CQRS, Event Sourcing, xUnit

Full Stack Engineer at 6 sense HQ - Dashboard/Chat

August 1, 2017 - February 28, 2018

Implemented Facebook Graph API webhook processing for 1,000+ messages per minute and built Angular bot-workflows secured with JWT and RBAC.

Full Stack Engineer at 6 sense HQ

August 1, 2017 - February 28, 2018

Developed a doctor scheduling platform using MongoDB schema design and Node.js REST APIs, handling 100K+ requests per day with hourly availability syncs.

Full Stack Engineer at 6sense HQ

August 1, 2017 - February 8, 2018

I worked on two client products at 6sense HQ, building Node.js backends and MongoDB data models, plus an Angular frontend for one of them. What I've done there: - Maatschap-Sog: Built MongoDB schemas and Node.js REST APIs for a doctor scheduling platform handling 100K+ requests per day, with hourly availability syncs. - Adshacker: Built Facebook Graph API webhooks that processed 1,000+ messages per minute. - Adshacker: Built an Angular bot-flow builder, secured with JWT and RBAC. Skills: Node.js, MongoDB, REST APIs, Angular, Facebook Graph API, JWT, RBAC

Full Stack Engineer at Max Group BD

February 21, 2017 - August 2, 2017

This was my first full-time engineering role, where I built the backend for a vehicle management system used by the company's staff. What I've done there: - Built Node.js and MongoDB REST APIs for a vehicle management system used daily by 100+ staff. - Secured the system with JWT authentication. Skills: Node.js, MongoDB, REST APIs, JWT