# Md Obaidur Rahman — Résumé

Engineering Leader · Full-Stack & Application Security

Engineering leader with 13+ years building, securing, and shipping scalable web and mobile systems. I lead teams and own architecture end to end — from system design and full-stack delivery (React, React Native, Node.js, TypeScript) to application-security strategy for sensitive, regulated platforms. Currently consulting for the Bangladesh Election Commission, where I lead delivery and security for the country's postal-voting infrastructure. I'm equally at home setting technical direction, mentoring engineers, and hardening client-facing systems that handle high-stakes data.

## Experience

### Consultant, Cryptography — Bangladesh Election Commission
*Jan 2026 — Present · Dhaka, Bangladesh*

- Led the web development team and the mobile application development team, owning the security posture of all client-facing applications.
- Designed, built and led delivery of the secure public web portal, the RO (Returning Officer) portal for encrypted receipt of postal votes, the admin dashboard, the prisoner-voting portal, and the post-office constituency finder.
- Hardened authenticated, encrypted data flows, including secure NID API integration for the postal-vote application, in partnership with EC officials.
- Drove process discovery, requirements gathering, trusted key-data synchronisation (constituency mapping) and reporting with EC officials.
- Coordinated vendors on secure SDK/API integration (SMS, email) and infrastructure.

Stack: React, React Native, TypeScript, Node.js, OCI

### Senior Power Platform Developer (Remote) — Modern IT
*Dec 2023 — Dec 2025 · CA, USA (Remote)*

- Architected and delivered enterprise solutions on Microsoft Power Platform.
- Built full-stack applications with the MERN stack, Next.js and REST APIs.
- Implemented secure authentication and encryption for sensitive business data.
- Integrated AI capabilities to automate and enhance business workflows.

Stack: Power Platform, React, Node.js, Express.js, Next.js

### Software Engineer (Remote) — Concourse Federal Group
*May 2019 — Apr 2025 · USA (Remote)*

- Led development of enterprise solutions using Microsoft Dynamics 365 and full-stack technologies (React, Angular, Node.js, Python, PHP).
- Implemented secure API design and data encryption for federal applications handling sensitive information.
- Managed deployments across AWS and Azure; mentored junior engineers and ran code reviews.

Stack: Dynamics 365, React, Angular, Node.js, Python, AWS, Azure

### Full-Stack Web Developer (Freelance) — Upwork
*Apr 2016 — Present · Remote*

- Delivered full-stack web solutions across a wide range of stacks under tight deadlines.
- Maintained a 100% client satisfaction rate over a decade of engagements.

Stack: JavaScript, TypeScript, React, Node.js, PHP

## Skills

- **Application Security:** Secure API design, Authentication & OAuth 2.0 / JWT, AES / RSA encryption, HTTPS/TLS, Web security best practices
- **Frontend & Mobile:** React, React Native, Next.js, Angular, Vue.js, TypeScript, Tailwind CSS
- **Backend:** Node.js, Express.js, GraphQL, Python, PHP / Laravel, C# / ASP.NET
- **Data:** PostgreSQL, MySQL, MongoDB, Firebase
- **Cloud & DevOps:** OCI, Azure, AWS, Docker, CI/CD, GitLab, GitHub Actions
- **Microsoft & Power Platform:** Dynamics 365, Power Apps, Power Automate, Power BI, SharePoint

## Education

- **Master of Computer Science**, Jahangirnagar University (2019–2020)
- **Bachelor of Science**, University of Asia Pacific (2012–2015)

## Awards

- **Top Rated Plus Freelancer**, Upwork (2020) — Maintained a 100% client satisfaction rate for over a decade.

## Languages

- Bengali: Native
- English: Fluent