HI
HawarIT Limited
Software Engineer
📍 Dhaka, Bangladesh · 📅 Jul 2026 – Present
Current Role
CAD/BIM · GIS
- ▸ Will add after 6 months of experience in the current role
Sadat Arefin Rafat
Full Stack Software Engineer
Full Stack Software Engineer
I'm a full stack engineer with 3+ years of professional experience, working primarily in .NET Core, Angular and Azure. My focus is translating product requirements into clean, maintainable systems: event-driven microservices, offline-first platforms, GIS tooling and multi-tenant SaaS. Currently a software engineer at HawarIT Limited.
.NET Core & C#
Angular & TypeScript
Azure & Cloud
Microservices
Docker
A few highlights:
Built an offline-first multi-tenant POS system with event-driven sync, designed for connectivity-poor environments
Reduced Revit model sync from ~25 minutes to ~5 minutes through parallelization and delta sync
Improved CI/CD pipelines and deployment reliability; mentored junior developers across both roles
About Me
I care about well-designed APIs, clean architecture and systems that stay maintainable as products evolve. My work spans event-driven microservices, offline-first platforms, BIM/GIS tooling, and multi-tenant SaaS, mostly in .NET, Angular and Azure, with some Python and AI tooling on the side.
Outside of code, I mentor junior engineers, work on improving deployment and observability practices and keep an eye on how LLMs and AI tooling are changing what software engineers actually build. I also travel when I can, read widely and follow One Piece.
Core Strengths
- ✓ System Design & Architecture (Microservices, CQRS, DDD)
- ✓ Backend Engineering (.NET, Django, FastAPI)
- ✓ Cloud Infrastructure (Azure, AWS, Docker, Kubernetes)
- ✓ Database Design & Optimization
- ✓ API Design & Integration
Key Contributions
- • Helped build an offline-first multi-tenant POS with event-driven sync
- • Contributed to 80% sync performance improvement
- • Supported team achieving 95% customer satisfaction
- • Mentored junior engineers & improved workflows
- • Worked on CI/CD pipelines & deployment optimization
📚 Reading Interests
Favorite Genres & Authors:
Islamic Books
Bangla Thrillers
English Thrillers
Mystery
📖 Love reading: Dan Brown, Rick Riordan, Harry Potter series
Travel
Places I've been around Bangladesh:
Chittagong
Rangamati
Sitakunda
Sylhet
Mymensingh
Tangail
Manikganj
Old Dhaka
Food
Into street food and trying new places around Dhaka.
Enjoy walking around the city with no particular plan.
Always looking for a good cup of tea or coffee.
Anime
Currently following One Piece.
Big fan of isekai and adventure series.
Rest
I take sleep seriously. A rested mind works better.
Words of Wisdom
"Let yourself be silently drawn by the strange pull of what you really love. It will not lead you astray."
Rumi
"The wound is the place where the light enters you."
Rumi
"Hazaaron khwahishen aisi ke har khwahish pe dam nikle / Bahut nikle mere armaan lekin phir bhi kam nikle"
(A thousand desires, each worth dying for... many of them I have realized, yet I yearn for more)
Mirza Ghalib
Professional Experience
RL
Refactor Logic
Founder & Software Engineer (Project Based)
📍 Dhaka, Bangladesh · 📅 Aug 2025 – Jun 2026
POS Systems
Automation
- ▸ Architected RefactorPOS: an offline-first multi-tenant POS system evolved from a modular monolith to a microservices architecture with event-driven sync
- ▸ Built event-driven pipelines with RabbitMQ and implemented robust conflict resolution for offline sync in low-connectivity environments
- ▸ Introduced CI/CD with Azure DevOps, improving deployment reliability and test coverage
- ▸ Led product planning and mentored the team, improving delivery predictability
HI
HawarIT Limited
Software Engineer
📍 Dhaka, Bangladesh · 📅 Aug 2023 – Jul 2025
CAD/BIM
GIS
- ▸ Reduced Revit model sync from ~25 minutes to ~5 minutes via parallelization and delta sync (80% performance improvement)
- ▸ Built a Canvas/WebGL map editor handling large numbers of spatial components using quadtree indexing for rendering performance
- ▸ Designed Azure-based auto-scaling infrastructure and implemented Microsoft Entra SSO
- ▸ Mentored 3 junior developers and shipped orthophoto processing pipelines for large image datasets
Selected Projects
Some interesting things I've built (and actually finished)
🧵
Textile Fabric Weave Detection
Computer vision system for industrial fabric quality control. CNN-based model for real-time defect detection, built as a research project using Python and TensorFlow. [Confirm accuracy and FPS figures before publishing]
Python
TensorFlow
FastAPI
OpenCV
Docker
React
💰
Financial Analysis Copilot In Progress
RAG-based AI assistant for financial document analysis. Exploring LLM-powered Q&A and extraction over structured financial data, using Python and ChromaDB. [Confirm scope and stack before publishing]
Python
ChromaDB
RAG
FastAPI
💳
Refactor Pay Payment Gateway In Development
Distributed payment integration layer in development, using saga pattern orchestration for transaction reliability. Aimed at serving as the payment backbone for RefactorPOS. [Confirm current implementation status before publishing]
.NET Core
PostgreSQL
RabbitMQ
Redis
React
📊
BizOps Central
Multi industry business management platform with POS, inventory management, reporting dashboards, payroll and tenant management. Everything a business needs in one place.
.NET Core
Blazor
Azure SQL
SignalR
Education
Bachelor of Science in Computer Science & Engineering
Islamic University of Technology (IUT)
📅 January 2019 – May 2023
Research Focus: Image and Video Super Resolution with Deep Learning
(Learned that making blurry images sharp is harder than it looks)
When I'm Not Coding
I enjoy traveling, attending tech meetups and reading widely. Big fan of deep conversations about system design.