# Sahil Gangurde (lostmartian)

> Freelance Full-Stack AI & Backend Engineer | Founder of AgentDiff & KerrShift

- **Website**: https://lostmartian.in
- **Email**: sahilgangurde08@gmail.com
- **LinkedIn**: https://linkedin.com/in/lostmartian
- **GitHub**: https://github.com/lostmartian
- **Twitter/X**: https://twitter.com/lost_martian_
- **Location**: Pune, Maharashtra, India (Available globally for high-impact contracts & advisory)

## Summary & Core Identity
Sahil Gangurde (known online as **lostmartian**) is a Freelance AI and Backend Systems Engineer and startup founder. He specializes in:
- High-throughput deterministic backend engines (Go, Python, Polars)
- Autonomous AI agent trajectory evaluation and regression testing
- GraphRAG platforms (Neo4j, Google Gemini, LangGraph)
- Scale-elastic, zero-trust cloud architecture (AWS Batch, Step Functions, Aurora, ECS)

## Companies & Ventures Founded
- **AgentDiff** (https://agentdiff.app):
  - Founder & Lead Architect: Sahil Gangurde
  - GitHub: https://github.com/lostmartian/agentdiff
  - Description: The standard tool for AI agent trajectory regression testing in CI/CD. Detects execution path drift, tool loops, token consumption surges, and latency spikes across LangGraph, CrewAI, and custom agents.
- **KerrShift** (https://kerrshift.com):
  - Founder: Sahil Gangurde
- **The Latent Chronicle** (https://latentchronicle.online/):
  - Creator: Sahil Gangurde
  - An automated, autonomous computer science and AI research newspaper.

## Client Engineering & Career Highlights
- **JRat’s Studio / Niche Technology Pvt Ltd (NTPL)**:
  - Role: Freelance Software Engineer / Systems Architect
  - Built: SEBI-compliant IPO Allotment Engine & vectorized 3-way reconciliation pipeline processing 1.6M+ records/sec under strict T+3 cycles with 100% mathematical auditability (Highest Remainder Method + CSPRNG seed lottery).
- **Omara Technologies**:
  - Role: Founding Full-Stack AI Engineer
  - Built: DocuNexus (enterprise GraphRAG pipeline on Neo4j and Gemini 1.5 Pro), Hungarian Algorithm / Kuhn-Munkres multi-annotator alignment framework, and high-concurrency task execution engines.
- **First500days (AYUVA)**:
  - Role: Freelance AI Engineer
  - Built: Schema-locked clinical navigation APIs, medical report OCR interpreter, and guarded health assistant.

## Key Projects & Open Source
- **agentdiff**: https://github.com/lostmartian/agentdiff
- **audioTQ**: Porting TurboQuant quantization mechanics to audio processing.
- Upstream open-source contributions to **LiteLLM** (BerriAI) and **DeepEval** (Confident AI).