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Jubayer Ahmed
I build the backend systemsproducts actually run on.
Software engineer at GeekSSort, working across NestJS and Django REST — 325+ production APIs, a multi-tenant ERP, a retail POS platform, and the data models underneath them. Five years of competitive programming decides how I approach the hard parts.
- Based
- Dhaka, Bangladesh
- Focus
- Backend architecture, AI integration
- Since
- Apr 2025
Profile
I work on the parts of a product most people never see — the APIs, the data models, and the caching layers that decide whether an app feels instant or sluggish.
Most of my work lives in Django, NestJS, and PostgreSQL. At GeekSSort that has meant a multi-tenant ERP with subdomain tenancy and RBAC, a multi-branch retail POS, a production e-learning platform, and a barbershop system with biometric attendance. Redis and Celery sit under most of it.
I care about clean architecture because it is what lets a codebase survive its second year. Five years of competitive programming shaped the rest — decompose the problem, find the real constraint, optimise what actually matters.
Lately I have been extending that into LLM work: retrieval pipelines, embeddings, and semantic search built with LangChain and LangGraph.
- Education
- Patuakhali Science and Technology UniversityJan 2020 — Oct 2025
- B.Sc. in Computer Science · CGPA 3.35 / 4.00
Experience
Full career →Mar 2026 — Present
Software Engineer
Backend architecture and delivery across ERP, retail, and e-learning products.
- Django
- DRF
- NestJS
- PostgreSQL
- Redis
- Celery
- Docker
- Next.js
Oct 2025 — Feb 2026
Junior Software Engineer
Backend services and modular API structures on client-facing production applications.
- NestJS
- GraphQL
- Prisma
- PostgreSQL
- Redis
- Shopify
Apr 2025 — Sep 2025
Software Engineer Trainee
Six-month trainee programme on a production-oriented e-learning platform.
- NestJS
- Next.js
- TypeScript
- PostgreSQL
- Prisma
- Postman
Selected work
All projects →Platforms that run someone’s business every day.
- 01
SortPi
Multi-branch retail POS & store operations
- Next.js
- TypeScript
- Django REST Framework
- 02
Compass German
German language e-learning platform
- Astro
- Next.js
- Django
- 03
Sortorium
Multi-tenant ERP — HR, inventory & operations
- Next.js
- Redux Toolkit
- Django
- 04
GeekSSort
Company website — restructure
- Astro
- Sanity CMS
- TypeScript
- 05
HireBD
Job marketplace — candidates & employers
- Next.js
- NestJS
- TypeScript
Capabilities
Backend
Where most of the work happens — API design, service boundaries, and the contracts between them.
- Django
- Django REST Framework
- NestJS
- Node.js
- REST APIs
- GraphQL
- WebSockets
- Celery
Data
Schemas that hold up under growth, indexed queries, and a caching layer that does real work.
- PostgreSQL
- Redis
- MongoDB
- MySQL
- Prisma
- TypeORM
- Firebase
Frontend
Interfaces built for the render path first — server rendering, measured bundles, accessible markup.
- React.js
- Next.js
- Astro
- TypeScript
- Redux Toolkit
- Tailwind CSS
AI & ML
Retrieval and LLM pipelines treated as systems — grounded, evaluated, and cheap to run.
- LLMs
- RAG
- Context Engineering
- Embeddings
- Semantic Search
- LangChain
- LangGraph
Infrastructure
Containerised services, reproducible builds, and pipelines that ship without ceremony.
- Docker
- Kubernetes
- AWS (EC2, S3)
- CI/CD (GitHub Actions)
- Vercel
Languages & Tooling
The daily set, including the two languages the contest years were written in.
- TypeScript
- JavaScript (ES6+)
- Python
- C++
- C
- Git
- Postman
- ESLint
- Prettier
- Inngest
Problem solving
Five years of contest practice, and what it left behind.
Contest record
ICPC Dhaka Regional 2025
Represented the team at the Dhaka Regional and solved 3 problems.
DUET IUPC 2025
Honourable position, solving 4 problems.
Meta Hacker Cup 2025
Solved 2 problems in Meta’s global coding competition.
PSTU IT Carnival 2025
3rd position, solving 4 problems.
Contact
GMT+6
Open to full-time roles and freelance work.