Kartikey Tyagi

I’m a Full-Stack Product Engineer with 4+ years of experience building and scaling mobile and web applications, with a strong focus on taking products from concept to production. I specialize in delivering reliable, high-performance experiences using Flutter, React Native, React, Next.js, TypeScript, and SQL.

In my current role, I’ve scaled ActivePass from MVP to a production-ready sports booking platform, supporting 2K+ monthly bookings with high reliability and operational stability. I architected and built mobile applications with Flutter and backend services using AWS Lambda (Python), SQL databases, and serverless infrastructure.

I’ve driven measurable product impact through deep-linking flows (Flutter + GetX), tiered pricing and dynamic availability, and robust payment handling via Razorpay and Stripe with a manual UPI fallback. I also automated payment reconciliation and settlement pipelines with AWS Lambda, SQS, and SQL-based reporting—reducing manual effort by 70% and lowering reconciliation errors.

I enjoy solving hard engineering problems, like concurrency and race conditions that reduced duplicate bookings by 40%. I’ve implemented end-to-end testing with Appium and used AI-assisted engineering tools (GitHub Copilot, Cursor, ChatGPT, Claude) to accelerate debugging, cut time-to-fix by ~50%, and shorten release cycles by ~30%.