Roni Sarkar
Software Engineer I @ Nagorik Technologies
Full Stack Engineer building cross-border remittance & fintech platforms with NestJS, Web3 / Ethereum, and real-time systems. Passionate about open source, DeFi, and AI-assisted development.
Experience
My professional journey
- ▸Led backend development of Remit & Go — a cross-border remittance mobile app using NestJS, PostgreSQL, and Redis with BullMQ for async job processing.
- ▸Integrated multiple payment gateways (Stripe, Fin.com, Transfi) and built wallet systems with real-time WebSocket notifications.
- ▸Built and deployed ERC-20 smart contracts on Ethereum & Polygon; integrated Web3 wallet connectivity into production.
- ▸Conducted R&D on blockchain protocols and DeFi patterns; delivered technical proposals adopted by the engineering team.
- ▸Integrated OpenAI APIs with custom prompt engineering for AI-powered product features.
- ▸Contributed to multiple Node.js ecosystem projects; collaborated in code reviews and architectural decisions.
Skills
Technologies I work with
Languages
Backend & APIs
Frontend
Databases
Blockchain & Web3
Payments & AI
Tools & DevOps
Projects
Things I've built
Story Spark AI
Open-source AI-powered story generator. Users get 2–3 unique story variations per prompt with real-time streaming, edit & publish capabilities.
First-Issue
Open-source platform for beginners to discover and contribute to OSS. Manages 20+ repositories with difficulty-tiered issues.
Remit & Go
Cross-border finance & remittance mobile app backend. Multi-gateway payments (Stripe, Fin.com, Transfi), ERC-20 smart contracts, wallet system, real-time WebSocket notifications.
PDF Annotation Platform
Full-stack PDF annotation tool with collaborative session management. Built from scratch with Next.js frontend and Flask REST API backend.
Blog
Thoughts on tech & engineering
More posts being written. Come back soon.
Education & Awards
Academic background & achievements
B.Tech in Computer Engineering
RK University
- ▸Coursework: Data Structures, Algorithms, DBMS, Operating Systems, Computer Networks
- ▸Active participant in technical hackathons and coding competitions
- ▸Contributed to 20+ open source projects during academic years
GSSoC 2026 — Project Admin
NEWGirlScript Summer of Code 2026 · May 2026
Story Spark AI accepted as an official GSSoC 2026 project. Managing contributors, reviewing PRs, and mentoring open source developers as Project Admin.
Hacktoberfest 2023
Open Source Contribution
30 pull requests with 95% acceptance rate; resolved 50+ issues across 20+ projects in October 2023.
GirlScript Summer of Code 2024
Open Source Program
Active contributor in GSSOC 2024 — contributed across multiple projects in the program's open source initiative.
Arch-A-Thon
24-Hour Hackathon
Led a team building a campus food delivery web application — food within 20 minutes. Managed full project architecture and team coordination.
Techathon 2.0
36-Hour Hackathon · Gateway Group of Companies
Backend developer for a meeting scheduling platform built with a 5-member team over 36 hours.
WebX — RK University
3-Hour Web Development Challenge
Ranked 5th in university-level web development competition.
DSA Problem Solving
Competitive Programming
Solved 400+ problems on LeetCode and 300+ on Coding Ninjas — consistent practice in algorithms and data structures.
Get In Touch
Let's work together
Current Role
SWE I @ Nagorik Technologies
Timezone
UTC+6 · Dhaka, Bangladesh
Response Time
Usually within 24 hours
Let's Talk
Whether it's a freelance project, a full-time opportunity, a collaboration, or just a technical discussion — I'm always happy to connect. Drop me a message and I'll get back to you.