I'm Tanvir Hasan Abir
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Building Scalable, AI-Powered Web Applications That Solve Real Problems
About Me
Engineer. Problem Solver. AI Builder.
I'm a Full-Stack Software Engineer with production experience building scalable, performance-optimized web applications. I specialize in the React/Next.js ecosystem with strong TypeScript proficiency, backed by solid backend skills across Node.js, Django, and FastAPI.
My AI/ML work spans integrating OpenAI, HuggingFace, and LangChain APIs, building end-to-end RAG pipelines with Qdrant and ChromaDB vector search, and deploying LLM-powered features in real-world products. I use GitHub Copilot and Claude Code daily to accelerate development.
Currently, I'm architecting Replium — a multi-tenant AI chatbot SaaS with cross-modal retrieval, embeddable widgets, and social platform integrations. Previously at Brain Station-23, I shipped production features for enterprise customer portals, reduced client-side JS by ~40%, and integrated bKash/SSLCommerz payment gateways. I'm also a competitive programmer with 450+ problems solved across multiple platforms.
AI / LLM Engineer
RAG, OpenAI, LangChain
Full-Stack Developer
React, Next.js, TypeScript
Backend Architect
Django, FastAPI, Node.js
Brain Station-23
Associate Software Engineer
Replium AI SaaS
Multi-Tenant Chatbot Startup
IIT, University of Dhaka
BSc in Software Engineering
Skills
Technologies and tools I work with
Frontend
Backend
AI / LLM
Databases
Testing
DevOps
Practices
Tech I Love Working With
Experience
My professional journey
Replium: Multi-Tenant AI Chatbot SaaS
Client-Facing Startup Product
- ▹Architecting a production-grade, multi-tenant AI chatbot SaaS actively in development; built an end-to-end RAG pipeline using OpenAI embeddings and Qdrant vector search with cross-modal retrieval, deploying AI agents via an embeddable web widget and social media platforms (Messenger, WhatsApp, Instagram).
- ▹Designed per-chatbot isolated knowledge bases in Qdrant with cross-modal retrieval; built a training center for document and image ingestion, Q&A customization, and chatbot persona tuning.
- ▹Implemented token-level usage analytics and conversational stats tracking with async AI inference via Django + Celery + Redis and SSE streaming.
- ▹Tech: Next.js, TypeScript, Django REST Framework, PostgreSQL, Qdrant, Redis, Celery, Docker, OpenAI API, Dokploy
Associate Software Engineer
Brain Station-23, Dhaka, Bangladesh
- ▹ObhaiVTS Customer and Admin Portal: Contributed to both the customer portal and multi-role admin dashboard using Next.js App Router hybrid rendering; enforced Server Components to cut client-side JS by ~40%, scoping Client Components strictly to interactive elements.
- ▹Built type-safe API layers and Zustand state slices in TypeScript across 10+ shared hooks; integrated bKash and SSLCommerz payment gateways with OTP-based auth, JWT refresh, and role-aware route protection via Next.js middleware.
- ▹Reduced redundant API calls by ~35% via TanStack Query caching and background refetching; shipped Billing Dashboards with infinite pagination, bulk invoice selection, and PDF export; built Order & Task Management for field technician workflows.
- ▹Translated Figma mockups to production UIs with ~95% design accuracy; participated in sprint planning and code reviews; used GitHub Copilot to accelerate delivery, consistently meeting sprint milestones.
- ▹Tech: React, Next.js, TypeScript, TanStack Query, Zustand, Shadcn UI, Tailwind CSS, Agile/Scrum
Software Engineer Intern
Brain Station-23, Dhaka, Bangladesh
- ▹Blogify Hub: Built a full-stack blogging platform with Next.js frontend (SSG/SSR) with JWT auth, email verification, and PIN-based password reset; Django REST Framework backend with 10+ API endpoints backed by PostgreSQL.
- ▹Developed blog CRUD, threaded comments, and analytics with Zustand; set up Celery + Redis for async notifications; containerized with Docker; achieved 80%+ test coverage via Playwright E2E and Jest/Pytest unit tests.
- ▹Reviewed SRS documents, broke features into hourly subtasks, and delivered against User Acceptance Criteria across 3+ milestones.
- ▹Tech: React, Next.js, Django REST Framework, PostgreSQL, Celery, Redis, Docker, Playwright, JWT
Event Lead -- ITverse 2023
IIT, University of Dhaka
- ▹Led a team to organize events and hackathons for 200+ participants.
Education
My academic background
Bachelor of Science in Software Engineering
Institute of Information Technology (IIT), University of Dhaka
Dec 2021 -- Mar 2026CGPA: 3.68 / 4.00
Higher Secondary School Certificate (HSC)
Govt. Science College, Dhaka
2018 -- 2020GPA: 5.00 / 5.00
Projects
A selection of my recent work
BiasFree News
Built an automated web scraper ingesting real-time article data from 7 major Bengali newspapers, with a scalable pipelin...
Applied NLP-based Agglomerative Clustering with Sentence-Transformers to group cross-source overlapping stories; integra...
Political Rhetoric Analysis Platform
Developed a large-scale data pipeline scraping and indexing 15,000+ articles from 7 sources, with structured storage and...
Built a RAG-based research chatbot with source-cited retrieval, rhetoric trend tracking, and narrative evolution analysi...
Blogify Hub
Engineered a full-stack blogging platform with Django plus DRF backend and React plus Vite frontend, implementing JWT au...
Built complete blog CRUD, comments, and nested reply workflows end-to-end, integrated frontend with backend APIs through...
Seq2Seq Text-to-Python Code Generation
Trained a Seq2Seq deep learning model to generate Python code from natural language, comparing multiple architectures wi...
Achieved BLEU score 0.34 with Attention-LSTM, outperforming baseline Seq2Seq by 18%, with full training visualization an...
Stack-Overflow 2.0
Built a full-stack developer Q&A platform with JWT authentication, post creation, threaded discussions, and real-time no...
Refactored a monolithic codebase into microservices using Docker and Nginx, cutting deployment time by 40% and enabling ...
TripMinds
Developed an AI-powered travel planning platform generating detailed itineraries with transportation, accommodations, an...
Integrated HuggingFace models for natural language image search and automatic trip blog/vlog generation with captions an...
Certificates
Professional certifications and credentials
Web Development with Python: Django & FastAPI Integration
Brain Station-23
Full-stack development with Django and FastAPI; built an Inventory Management System with auth, RBAC, CRUD, and API integration.
Prompt Engineering Foundations: Start Talking to AI Efficiently
Brain Station-23
Prompt optimization, effective AI interaction design, and improving LLM performance through structured prompting techniques.
Achievements
Milestones and recognitions
Top 10 Finalist at BUET CSE Fest 2024 -- AI & API Hackathon segment.
Winner at the AI for Change Hackathon.
Shortlisted among the top 507 out of 2,521 candidates in Geeky Solutions Learnathon 3.0.
Pupil at Codeforces (max rating: 1200+) | 2-Star at CodeChef (max rating: 1400+).
Solved 450+ competitive programming problems across Codeforces, CodeChef, LeetCode, HackerEarth, and GeeksforGeeks.
Get In Touch
Let's connect and build something great
I'm always open to discussing new projects, creative ideas, or opportunities. Feel free to reach out through any of the channels below.
Location
Dhaka, Bangladesh
Let's Work Together
Have a project in mind? I'd love to hear about it.