Senior Freelance Software Developer & Systems Architect
Sahil
Kargutkar.
Architecting high-scale web platforms, production AI integrations, and sub-second search systems.
Based in Mumbai, Maharashtra, India. I am a senior freelance software developer and systems architect with 6+ years of engineering experience across enterprise software teams (Publicis Groupe, Concentrix, Justdial) and global client consulting. Available for remote freelance engineering contracts, technical advisory, and architectural consulting.
Selected Work
Case Studies & Measurable Outcomes
EV Tech Institute
Enterprise Architecture & Performance
Rebuilt architecture to cut latency to 1.1s. Secured top-5 rankings for 12 core keywords; organic traffic doubled within 90 days.
web-ai-slop
Open-Source Developer Tooling
Authored an open-source 15-section audit checklist and agent skill adopted by engineers to enforce production craft standards.
Neon Coins
FinTech & Real-Time Dashboard
Architected full-stack dashboard servicing 500+ daily wallet connections with zero downtime across 18 months of production.
Specialization
Architectural Capabilities
Full-Stack Architecture & Scale
Architecting robust Next.js and React frontends backed by resilient Node.js APIs, optimized databases, and clean distributed systems.
Production AI & LLM Systems
Engineering custom AI workflows, tool-calling agents, retrieval-augmented generation (RAG), and data-trained conversational interfaces.