Pawan Singh

As a Senior Independent Backend Contractor, I've delivered backend systems for AdTech, Healthcare, SaaS, and AI/ML product companies. My work includes real-time AdTech bidding and transcoding modules handling millions of requests daily. For healthcare and insurance projects, I built ETL pipelines processing millions of claims and records, and automated insurer onboarding workflows. I also designed a multi-tenant user management system with RBAC and improved API response times through query optimisation and caching. I've integrated LLM and AI/ML models into production, including a Go code-generation pipeline with multi-model benchmarking. I work as a direct independent contractor with US and European entities and am available during EST/PST business hours.