Sachin Mour

• Joined as Senior Full Stack Engineer and progressed to CTO of a nutrition-technology platform for elite athletes and teams. I lead the engineering team and still write production code most days.
• Helped build the product now trusted by 40% of the professional peloton at the Tour de France and 50% of the Premier League. In the CEO's words, instrumental in a 300%+ increase in ARR and finding product-market fit.
• Re-architected the core Postgres data model (years of history per user, millions of rows per table) with co-located JSON storage and new query patterns, cutting multi-day queries from several minutes to under 700ms. That turnaround was a key factor in closing a $2.1M seed round.
• Led the migration from Supabase to a GCP-native stack and drove the company's SOC 2 audit: audit logging, access controls and data protection.
• Built CI/CD with multiple dev deploys a day, weekly production releases and same-hour hotfixes, with monitoring and rollback.
• Run infrastructure as code with Pulumi on GCP: multi-region PostgreSQL with read replicas, Kafka streaming pipelines, Grafana dashboards and automated backups.
• Build backend services in TypeScript and Node.js (GraphQL, Prisma) and a Python calculation engine, integrating wearables like Apple Health and Whoop.

Client engagements through the Toptal network (top 3% of freelance talent):

• Fashion Nova, one of the top 3 stores on Shopify: Lead Engineer. Built the React Native mobile app on the Shopify Storefront GraphQL API and led search, collections and catalog work on Shopify Plus for a storefront launching hundreds of products a week.
• Joybird: built the mobile experience for joybird.com.
• AI startup in financial due diligence: CTO. Built an agentic RAG platform from scratch on LangGraph and LangSmith that indexed 10M+ pages and scored 100% on the Vectara RAG benchmark, with hybrid retrieval and a verification layer behind page-level citations.
• US healthcare company: Lead Engineer. Owned HIPAA-compliant authentication and authorization, the payments pipeline with reconciliation, and PHI-safe audit logging aligned with ISO 27001 and SOC 2.
• AI virtual try-on platform: Lead Engineer. Microservices, public APIs and a developer dashboard, plus a React Native app holding a steady 60 FPS with real-time face and garment detection on device.
• Cut deployment time from days to minutes with automated CI/CD and kept 70%+ test coverage with Jest and Appium.

• Led a team of nine engineers (5 backend, 3 frontend, 1 platform) across time zones, with regular pairing and code reviews, building a web-based 3D modeling tool for content creators at the NFL, HuffPost and Yahoo.
• Designed the backend from scratch as microservices on AWS: Lambda for stateless APIs, Kubernetes (EKS) for long-running processing, and event-driven queues between services instead of cascading synchronous calls.
• Built a server-side pipeline running Blender headless that turned huge creator files into optimized 3D assets for every platform with no human in the loop.
• Developed a way to keep multiple databases in sync using streams.
• Wrote GraphQL microservices in TypeScript and Go with published docs, and kept synchronous responses under 300ms.
• Kept 70%+ test coverage (Jest, Vitest, K6, Cypress) and built a Docker dev environment that cut onboarding from weeks to days.