Siam Hossain

At Voltaris Labs, I re-architected an n8n lead pipeline that cut expensive scrape calls by around 80% while preserving output and documenting monthly operating costs at $80–$105. I build production automation end to end: external API integrations, LLM classification and routing, CRM writes, confidence-based approval gates, retries, checkpointing, deduplication, Slack alerting, and operator runbooks. I also produced more than 1,000 phone-verified records at under $0.004 each while applying TCPA and do-not-contact filtering before every outreach send. Outside client work, I publish tools and build full-stack products. My Python HTTP load-testing tool, wallop, is published on PyPI with 40 CI tests across three operating systems and two Python versions; I’ve also built FastAPI, React, Next.js, Supabase, PHP, and MySQL applications. I bring independent ML research in PyTorch, Keras, DINOv2, and CLIP, alongside secure-by-design engineering practices covering SSRF defence, access control, prepared statements, secret handling, and threat modelling.