Hi, I’m

Rubel Hosen

Senior Software Engineer

I’m a software engineer with 8+ years of experience building and maintaining production applications across healthcare, retail and logistics. I work primarily with C#, .NET, APIs and SQL Server, with 5+ years of remote experience in distributed international teams.

8+ years Software engineering
.NET / C# Primary stack
5+ years remote Teams across USA · Romania · Ukraine · Bangladesh

Career

Work Experience

The work that shaped how I build, debug and maintain production software.

Sep 2026 — Present

Senior Software Engineer

ReliSource

Current

Working on enterprise applications and integrations across healthcare, clinical research and cold-chain logistics.

  • Develop and maintain C#/.NET applications and backend services.
  • Build and support REST APIs and system integrations.
  • Work with SQL Server-backed data, business logic and application workflows.
  • Investigate and resolve issues across services, APIs, integrations and databases.
Apr 2021 — Aug 2026

Software Engineer

ReliSource

Building and maintaining production software for international organizations across healthcare, clinical research and cold-chain logistics in a distributed team. My work spans feature delivery, APIs, data-backed workflows, debugging, design discussions and code review across time zones.

Healthcare & Clinical Research

Long-running production systems where changes must fit existing data, workflows, users and operational constraints.

Cold-chain Logistics

Contributing to the foundations and ongoing development of software supporting temperature-sensitive operational workflows.

  • Build and maintain .NET application features and REST API workflows.
  • Work with SQL Server-backed business processes and production data.
  • Investigate defects and improve legacy behavior without unnecessary rewrites.
  • Participate in technical discussions and peer code reviews.
  • Conduct technical interviews (~100 to date), assessing skills, problem-solving, and role fit.
Remote collaboration

5+ years working day-to-day with distributed teammates across the USA, Romania, Ukraine and Bangladesh, including design discussions, code review and production delivery across time zones.

Sep 2018 — Mar 2021

Programmer

Southtech Limited

Worked in enterprise retail software across POS, e-commerce and APIs, combining product development with direct client collaboration. The role involved backend and frontend work, requirement discussions, client meetings, product demonstrations and close collaboration with business analysts.

  • Developed and integrated features across enterprise POS, e-commerce, and API systems.
  • Translated client requirements into practical product changes.
  • Worked directly with clients through onsite visits and requirement discussions.
  • Presented product demos and supported business analysts during presales.
  • Contributed to code reviews, testing, and product integrations.
  • Led a five-person team to deliver an e-commerce solution on a tight timeline.
Client-facing work

Onsite visits, requirement meetings, product demonstrations and close collaboration with business analysts and client teams.

Jun 2018 — Aug 2018

Software Engineer Intern

Southtech Limited

Learned the EasyPOS product and retail domain, contributed to UI research, and designed a more user-friendly POS interface.

Selected Work

Projects

A small selection that represents the kind of software I work on now.

01
Professional · Healthcare

Clinical Trial & Patient Recruitment Software

Long-running production software supporting healthcare and clinical-research workflows. My work includes application features, APIs, SQL-backed processes, debugging existing behavior and making changes safely inside an established product.

.NET · REST APIs · SQL Server · Production Systems
Production Existing users, data and workflows
02
Professional · Logistics

Cold-chain Logistics Platform

A newer cold-chain logistics platform where I contribute to application foundations, feature development, APIs and data concerns as the domain grows.

.NET · APIs · SQL Server · Application Foundations
03
Independent · Android Live

Mane

An English↔Bangla dictionary and vocabulary app I took from idea to production. It has given me first-hand experience with offline data, release compatibility, production crashes and maintaining software after real users arrive.

Android · Offline Data · Releases · Reliability
View on Google Play ↗
04
Professional · Enterprise Retail

POS, E-commerce & API Systems

Full-stack enterprise work across POS, e-commerce and internal APIs, including client-driven workflows and integration into existing products.

C# · .NET · SQL · Web Applications

Technical

Technical Focus

The technologies and engineering practices that have been central to my production work.

Core stack

C# / .NET

Most of my professional work is in .NET applications: building features, APIs and data-backed workflows, then maintaining them in production.

Build

ASP.NET Core · REST APIs

Application services, API endpoints and business workflows.

Data

SQL Server · T-SQL · Entity Framework · LINQ

Relational data access and production application workflows.

Cloud & Delivery

Azure · Azure DevOps · GitHub Actions · CI/CD

Experience working with cloud-hosted applications, deployment pipelines, release workflows and production environments.

Identity & Integration

Authentication · SSO · Okta · Integrations

Connecting applications to identity providers and external systems.

Engineering Practice

Code Review · Debugging · Design Discussions · Production Maintenance

Understanding existing behavior, making deliberate changes and improving software without unnecessary complexity.

Collaboration

Distributed Teams · Client Meetings · Business Analysis · Product Demos

Working across engineering, business and client contexts to understand problems, explain solutions and move work forward.

Background

Education

City University, Bangladesh

Bachelor of Science in Computer Science & Engineering

2012 — 2017

Outside Work

Interest

I like building independent software products because they expose a different set of problems: product decisions, releases, user feedback and production issues all become part of the same job. Away from software, I spend time with family, travel when I can, and enjoy movies and series.

Get in touch

Contact

For software engineering opportunities, collaboration or professional inquiries.