A Opensource and self hosted alternative of Grammarly
AIChromeExtensionAlternativeGrammarly
CURRENT DIRECTIVE
Swadhin Biswas
Open to Mid-level Data/Backend Roles
Co-built a startup to 1M users, got acquired — now building OPNCODEHUB and engineering production data pipelines.
OPNCODEHUB builds open-source tools that make data engineering and ML accessible to developers everywhere. Looking for mid-level backend or data engineering roles in EU teams shipping production systems.
Selected work
Projects3
Capabilities
Stack54
Language
Core 
Python 
TypeScript 
Rust 1 
Go
Working knowledge 
Mojo 
JavaScript 
SQL
Framework
Core 
Django 
FastAPI 
React 
Next.js
Working knowledge 
Astro 
Vue.js 
Node.js
Data Engineering
Core 
Apache Airflow 
Apache Spark 
dbt 
Kafka
Working knowledge 
Apache Flink 
Mage 
Prefect
Summary
What I build
Currently focused on distributed data systems and MLOps infrastructure. Open to mid-level Data Engineer or Backend Engineer roles at EU-based tech companies — remote or relocation considered. Available for interviews within 2 weeks.
Production ML · MLOps
6+ years in production systems
Open to EU relocation · Visa sponsorship welcome
Languages: English (professional) · Bengali (native)
Work history
Experience2
Co-Founder & Lead Data/Backend Engineer at BoringRats (Acquired ✓)
Co-founded and scaled BoringRats to 1M+ active users. Designed real-time event ingestion pipelines, user analytics warehouses, and MLOps workflows. Built scalable backend systems and led infrastructure management before successful acquisition in Nov 2025.
Full Stack Developer at Freelance
Delivered 8+ full-stack projects for US and UK SaaS/e-commerce clients. Reduced page load times by 40% with React optimization. Built REST APIs serving 10K+ daily requests using Django and PostgreSQL.
Jan 2021 - Dec 2022
Education
Background
B.Sc. in Computer Science and Engineering
Daffodil International University
Jan 2023 — Apr 2026
Relevant Coursework: Data Structures, Algorithms, Database Systems, Machine Learning, Software Engineering
Research1
All publications →Blog3
All posts → Jun 12, 2026
We had 1M users, got acquired, and I still think we made the wrong call
We built Boringrats for open source developers, scaled to 1M users on donations alone, and eventually had to let it go. This is the honest version of what that actually looked like.
ArchitectureNews
Jun 5, 2026
keybinding
BackendDevOpsPerformance
May 22, 2026
I Got Tired of GitHub Being Down, So I Built My Own Git Platform
OpenCodeHub is an open-source, self-hosted GitHub alternative built with Astro, TypeScript, and Drizzle ORM. Features SSH, stacked PRs, CI/CD pipelines, and AI code review — on your own server.
System DesignBackendArchitecture
Contact
Let's build something useful
Best way to reach me is email. I'm interested in backend systems, AI product work, research tooling, and serious technical collaborations.
swadhinbiswas.cse@gmail.com →