Software Engineer · Flutter App Builder · Research Developer

Building mobile apps, real-time systems, and health-AI products.

I create Flutter applications, software products, and research-driven AI systems with a focus on clean user experience, scalable engineering, and meaningful digital impact.

Base

Guangzhou, China

Focus

Flutter, real-time systems, health AI

Graduate research

Information and Communication Engineering

Open to

Software, research, and product collaboration

Formal professional portrait of Hasnat Jani Rafin
FlutterMobile AppsHealth AIResearch

Selected Highlights

Focused work across software, mobile products, and research.

A concise overview of the areas that shape the portfolio.

Mobile App Development

Flutter-based product development for Android and iOS with a focus on stable releases and clear user flows.

Real-Time Systems

Experience building communication-oriented products and handling product features that depend on live interactions.

Health-AI Research

Research work around interpretable facial analysis, micro-expressions, and smartphone-based health sensing.

Product Engineering

A practical mix of engineering, release management, iteration, and product thinking across apps and research prototypes.

Featured Apps

Selected product work and mobile case studies.

A curated set of app and game projects presented with clearer product framing.

See all work

Social Voice App

ZOVO

A social voice-chat product built around live rooms, audience interaction, and community-oriented mobile experiences.

Software Engineer

FlutterReal-time systemsMobile UIRelease workflowApp Stores
View case study

Finance Utility App

Pocket Hishab

A lightweight personal finance app designed for simple daily expense tracking and practical money management.

Product Developer

FlutterUtility DesignMobile ProductGoogle Play
View case study

Health Tech App

PulsePro - Heart Rate Insight

A camera-based heart-rate monitoring app built around smartphone PPG concepts, signal handling, and user-friendly health insight.

Flutter Developer

FlutterPPGSignal processingMobile healthAmazon Appstore
View case study

Mobile Game

Bike Hills - Uphill Adventure

A physics-oriented uphill bike game centered on terrain balance, momentum, and simple but replayable mobile control.

Software Developer / Project Manager

Game developmentPhysics gameplayGoogle PlayMobile UX
View case study

Featured Research

Research and engineering projects with academic depth.

Projects spanning interpretable AI, mobile health, IoT, and foundational software work.

Explore projects

Master's Thesis Research

Temporal Contrastive Learning for Interpretable Facial Emotion Recognition

2024 - 2026

A research project on interpretable facial video analysis using temporal contrastive learning, sequence modeling, and explanation-oriented outputs.

PyTorchContrastive learningBiLSTMAttentionGrad-CAM
View details

Research

Real-Time Depression Detection via Micro-Expressions

2025 - ongoing

An ongoing research direction exploring privacy-aware, real-time depression-related signal analysis through micro-expression cues and on-device processing.

AndroidComputer VisionOn-device AIMicro-expressionsHealth AI
View details

Health Tech Thesis Project

Heart Rate Prediction Application using Flutter

2024

A Flutter-based heart-rate application using smartphone camera PPG ideas, signal-quality handling, and mobile health interaction design.

FlutterPPGSignal processingMobile health
View details

Capstone Project

Smart City IoT Services Platform

2023

A smart-city services project using connected services, MQTT-style IoT communication, and container-oriented deployment ideas.

REST APIsMQTTDockerIoT
View details

Professional Journey

A path shaped by product work, research, and international study.

The portfolio combines applied software engineering with academic research and mobile product development.

November 2025 - June 2026

Software Engineer Intern

BRS Engineering (Guangzhou) Co., Ltd.

Worked on cross-platform mobile features for enterprise-oriented applications, with delivery across iOS and Android and integration with cloud-backed services.

August 2024 - June 2025

Software Engineer

Zintora Software Ltd

Built a Flutter-based voice chat product with real-time interaction features and handled production delivery across public app stores.

September 2022 - June 2024

Software Engineer

Swinroll Network Technology Co., Ltd.

Worked on cross-platform mobile products from implementation through release, including store publishing, updates, and iterative improvements.

Skills And Technologies

Tools used across mobile engineering, AI, and systems work.

Grouped for readability instead of a long undifferentiated list.

Mobile Development

Building and shipping mobile applications with attention to usability, maintainability, and release quality.

FlutterDartAndroidiOSApp StoreGoogle PlayAmazon Appstore

AI And Research

Applied machine learning, signal analysis, and interpretable modeling for research-driven systems.

PyTorchTensorFlow LiteScikit-learnOpenCVMediaPipeGrad-CAMSHAP

Engineering Systems

Practical engineering tools and foundations used across apps, experiments, and software projects.

PythonJavaC++CSQLREST APIsAWSGitCI/CD
South China University of Technology
Education Preview

South China University of Technology

Master of Science in Information and Communication Engineering

Graduate study supported by the Chinese Government Scholarship. Research focus includes interpretable facial emotion recognition and health-AI systems.

Achievements Preview

Scholarships

Chinese Government Scholarship

Scholarships

Academic Scholarship for International Students

Scholarships

Zhejiang Provincial Government Scholarship

Scholarships

First-Class Scholarship, HDU

Work Snapshot

Mobile app development, real-time interaction systems, academic research, and international study all inform the way I approach engineering work.

Read more about the journey

Gallery Preview

A smaller visual layer that stays personal without overwhelming the homepage.

Professional, campus, and international moments are kept curated and concise.

Open gallery
Formal portrait of Hasnat Jani Rafin in a navy suit

Professional

Professional Portrait

Hasnat Jani Rafin standing by the sea in a navy shirt

Professional

Seaside Portrait

Hasnat Jani Rafin walking outdoors in a campus-like setting

Campus

Campus Walk

Hasnat Jani Rafin in an outdoor academic setting wearing sunglasses

Academic

Academic Setting

Let’s connect for software, apps, research, and product work.

For professional opportunities, research collaboration, app or product work, or software projects, please connect through my public professional profiles.