I'm Sadia Afrin, an AI-integrated full-stack engineer. I build the APIs, front-ends, and the RAG pipelines and agents that make products smart — with real-world UI/UX and QA experience, so what I ship is usable and release-ready.
- 18
- Projects across web, mobile & AI
- RAG
- Pipelines & n8n agents built into real products
- 04
- Production apps QA-tested for Singapore clients
- 04
- Platforms designed for one POS system
Web and mobile engineering, RAG pipelines and agents, and the product design behind them — each one a full case study.
I build full-stack and AI-powered products. Real-world UI/UX and QA experience means fewer handoffs, fewer gaps, and faster, safer shipping.
- 01
Full-stack Web Development
Production web apps end to end — secure APIs, databases, auth, and polished front-ends.
- 02
AI & Automation
RAG pipelines, LLM agents, and n8n workflows integrated into real products.
- 03
Mobile App Development
Cross-platform iOS and Android apps in React Native and Flutter.
- 04
UI/UX & Product Design
Real-world product design experience — flows, design systems, and prototypes grounded in what's buildable.
- 05
Quality Assurance
Real-world QA on production apps — catching the bugs that cost money and trust.
One engineer across the whole lifecycle, so nothing gets lost between design, code, and QA.
Architect
Understand the users and the problem, then design the data model, API contract, and user flows before writing code.
Build
Ship the backend and front-end together — secure APIs, auth, and responsive web and mobile UI wired to real data.
Integrate AI
Add intelligence where it earns its place — retrieval over real documents, LLM agents that call your APIs, automated workflows.
Test & ship
Test the critical paths the way a QA engineer would, fix what breaks, and release with confidence.
Campus, competitions, teams, and the people behind the code. Drag to explore.
- Sep 2026 – Present
AI Engineer Intern
KaizenExt · Remote · Bangladesh
Full-stack and AI engineering across three projects — building front-ends, back-end APIs, and AI features with Next.js, Node.js, Express, and PostgreSQL.
- Apr 2026 – Aug 2026
Software Quality Assurance
Techzu · Remote · Singapore
Owned manual QA on four production applications used by companies in Singapore — The Whale Tea mobile app and its ZuPOS admin, an advertising agency platform, and a project and work-log management tool.
- Apr 2026 – Aug 2026
UI/UX Designer Intern
Techzu · Remote · Singapore
Designed a multi-platform point-of-sale experience for The Whale Tea — a bubble tea brand — across mobile, self-service kiosk, admin panel, and website.
- Oct 2025 – Dec 2025
Mobile App Developer
New BCIT Systems · Remote
Built React Native features for an e-commerce app, translating Figma designs into production-ready mobile screens.
I'm looking for full-time full-stack and AI engineering roles, and I take on select freelance projects.