Data and backend engineer with 2+ years building streaming pipelines, lakehouses and the services around them. I work mostly in Python, Go and TypeScript, and I prefer systems that keep running when nobody is watching: Kafka ingestion, dbt warehouses on DuckDB, GDPR-native erasure, schema-contract gates in CI.

Currently building OpencodeHub, a self-hosted Git platform with CI and merge queues, and AegisVision, a multi-camera AI surveillance system. Latest research: Aurora, a modular reasoning architecture with a JOSS paper.

Open to: Data Engineer · Backend Engineer · Analytics Engineer · mid-level · Germany, Netherlands, Austria, EU remote · relocation with visa sponsorship · available immediately.

Languages: English (Professional, daily working language) · Bengali (native) · Hindi (conversational) · German (currently learning).

Email: swadhinbiswas.dev@gmail.com · swadhinbiswas.cse@gmail.com · eu@swadhin.cv

Portfolio · Book a call · Email · LinkedIn · X

• 1M+ users on the BoringRats community platform before it was acquired (NDA) in 2025
• JOSS research paper and archived DOI for Aurora: GSM8K 47.2% → 55.6%, confidently wrong answers 19.8% → 2.9%
• eu-air-traffic: live EU airspace pipeline on Kafka, dbt and DuckDB, with a public Hugging Face dataset and a Zenodo DOI
• eurostream: GDPR-native lakehouse whose six-layer Article 17 erasure runs in 66.95 ms mean against a 60 s statutory window
• opengrammar: privacy-first Grammarly alternative at 124★, offline engine plus five deploy targets
• OpencodeHub: self-hosted Git platform with CI, stacked PRs and merge queues, 668 tests

2026-Now: Founder & Maintainer at OpencodeHub - self-hosted Git platform (Gitea-class parity, 668 tests, E2E), Go / TypeScript

2026-Now: Builder at AegisVision - multi-camera AI surveillance and behavioural monitoring system, Python

2023-2025: Founder, Open Source Community Platform (BoringRats) - discovery, learning paths and real-world guidance - Blog + Discord + Telegram - 1M+ combined users - Acquired (NDA)

2021-2023: Freelance - Backend & Automation Engineer - 100+ paid jobs across open source, freelance contracts and client work: backend systems, automation and pipelines

• eu-air-traffic: live EU airspace pipeline · Kafka, dbt, DuckDB · ~2,000 aircraft tracked, 15-minute lake, public dataset, DOI
• eurostream: GDPR-native streaming lakehouse · six-layer Art. 17 erasure at 66.95 ms mean · Kafka, DuckDB, Turso
• Aurora: modular reasoning architecture · GSM8K 47.2% → 55.6% · confident errors 2.9% · paper + DOI
• opengrammar: privacy-first Grammarly alternative · 156k-word offline engine, five runtimes · 124★
• OpenCodeHub: self-hosted Git platform · CI, stacked PRs, merge queues, AI review · 668 tests
• AegisVision: multi-camera AI surveillance and behavioural monitoring system · Python, real-time detection

• A Unified Denoising and Adaptation Framework for Self-Supervised Bengali Dialectal ASR - first author, with Imran and Tuhin Sheikh · arXiv:2509.00988 · PDF WavLM-based framework with two-stage fine-tuning for noise-robust dialectal recognition. Tested across dialects from clean audio to low signal-to-noise ratios, it beats fine-tuned wav2vec 2.0 and multilingual Whisper.
• Aurora (ART): A Modular Reasoning Architecture for Reliable and Efficient Neural Systems - lead author · paper · DOI Six-stage transformer with an explicit uncertainty channel: GSM8K 47.2% → 55.6%, confidently wrong answers 19.8% → 2.9%.
• An Empirical Benchmark Dataset for Paillier-Based Privacy-Preserving REST API Gateways - Zenodo DOI Per-request telemetry benchmark for homomorphic encryption overhead in REST API gateways.

Full list with abstracts: swadhin.cv/research

Core: Python · Go · Rust · TypeScript · SQL · Kafka · Spark · Airflow · dbt · DuckDB · PostgreSQL · Redis · FastAPI · Django · Docker · AWS (Glue, Redshift, Athena) · GCP (Dataflow, Dataproc) · PyTorch

Working knowledge: ClickHouse · Kubernetes · Terraform · Airbyte · Dagster · Prometheus · LangChain · OpenAI / local LLM APIs

_{Data Engineering · Cloud · Databases · AI · Backend - full stack →}

DATA ENGINEERING                                RESEARCH                                        
  eu-air-traffic live EU airspace pipeline        contexa        versioned llm agent memory     
  eurostream     gdpr-native streaming lakehouse  DOOMSDAYCS     offline cs encyclopedia        
                                                  FAANG-Playbook 1,400+ leetcode problems       
DEVOPS                                                                                          
  OpencodeHub    git platform w/ ci pipelines   TOOLS                                           
  gvx            the pnpm of python               veet           universal app uninstaller      
  HiFiLinux      audiophile audio for linux       lsf            ls with nerd-font icons        
                                                  fetchx         neofetch rewritten in rust     
BACKEND                                           Ghost          free & open coding tool    
  JustAPI        zero-copy rust web framework     ZenDownload    download anything, one place   
                                                  vscode-android a real ide for android         
MACHINE-LEARNING                                  warren         rootless cli runtime           
  Aurora         modular reasoning architecture                                                 
  AegisVision    multi-camera ai surveillance   OTHERS                                          
  Ecoguard       self-hosted llm inference gw     linuxy         one-click appimage runner      
  opengrammar    open-source grammarly alt        de-omarchy     modern desktop, no omarchy     
                                                  Mervelas       ai coding cli built on bun     
                                                  VidoLib        lag-free media engine          
                                                  moonshell      personal qml linux rice        

_{Case studies for the featured work: swadhin.cv/projects}

• Portfolio: @swadhin.cv
• Book a call: cal.com/swadhinbiswas
• LinkedIn: @swadhinbiswas
• Email: swadhinbiswas.dev@gmail.com · swadhinbiswas.cse@gmail.com · eu@swadhin.cv
• X: @swadin_sh
• YouTube: @BitsWar

_{Based in Dhaka, BD · Willing to relocate EU · Available immediately}

off the clock: street-food hunter · anime marathoner · Mystery & mythology story hunter