Abu Sufian Rafi | Software Engineer Portfolio

Available for work

Hi, I'm Abu Sufian Rafi

Software Engineer

Building scalable applications and solving complex algorithmic problems.

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About

I'm a Software Engineer with a Computer Science & Engineering background, focused on building reliable digital products that solve real user problems. I bring a competitive programming mindset to software development, with strong analytical thinking and disciplined debugging.

My primary stack includes Flutter and Clean Architecture, and I enjoy collaborating across product and engineering teams to ship maintainable features end-to-end. I care about code quality, performance, and creating smooth user experiences.

Problems Solved

Online Contests

Onsite Contests

0th Global

IEEEXtreme 18.0

Experience

Software Engineer — LiiLab

Feb 2026 - Present · Sylhet, Bangladesh

Built core features for the OneIELTS app using Flutter and Clean Architecture.
Contributed to a QTI-XML based dynamic Flutter widget rendering system powering mock tests for 150K+ users.
Integrated REST APIs and improved app performance and scalability.

Software Engineer Intern — LiiLab

Oct 2025 - Jan 2026 · Sylhet, Bangladesh

Developed features for OneIELTS using Flutter.
Worked with REST APIs, state management, and Clean Architecture.
Assisted in debugging, testing, and performance improvements.

Unity Developer Intern — Concepft

Jun 2025 - Aug 2025 · Remote

Developed and optimized 2D mobile games using Unity (C#).
Implemented gameplay systems (level progression, scoring, animations).
Contributed to bug fixing, performance tuning, and Play Store deployment.

Projects

ClassMate

Android app built with Flutter, Dart, and Firebase to auto-generate weekly class schedules. A scheduling engine reads Excel inputs and uses a greedy algorithm to avoid conflicts — reducing manual scheduling time by ~80%. Includes an admin panel for data import and manual adjustments.

FlutterDartFirebaseGreedy Algorithm

GitHub

CipherPuzzle

Retro puzzle game built with HTML, CSS, JavaScript, and Firebase. Features Caesar, Vernam, and Hill cipher challenges with multimedia clues, Firebase Auth & Firestore for login and progress tracking, and a responsive 8-bit UI with audio effects. Deployed on Netlify.

HTMLCSSJavaScriptFirebase

GitHub Live Demo