Karthik Rajagopal — Full-Stack Engineer
Hyderabad, Telangana
Full-stack engineer with six years across Node, React and PostgreSQL, most of it on order and payment flows for Indian retail. Rebuilt a checkout that dropped 8% of orders at peak into one that has held through three festive sales without a manual intervention.
Experience
Full-Stack Engineer, Kestrel Commerce · April 2022 – present
Order platform for a direct-to-consumer marketplace taking 2.1 lakh orders a month.
- Rebuilt checkout on an idempotent order state machine in Node and PostgreSQL; order drop-off at peak fell from 8% to 0.05% across three festive sales.
- Cut the catalogue response from 780ms to 140ms by moving variant pricing into a materialised view refreshed on write.
- Shipped the UPI refund flow end to end — React screens, ledger entries and the nightly reconciliation job — settling 11,000 refunds a month untouched by hand.
- Brought two junior engineers through their first on-call rotation; both now run releases without supervision.
Software Engineer, Bluepine Technologies · June 2020 – March 2022
- Built the seller dashboard in React and TypeScript that replaced a nightly emailed spreadsheet for 3,400 sellers.
- Moved image handling to on-the-fly resizing, taking 40GB of stored derivatives down to 3GB and page weight down 62%.
- Wrote the zero-downtime migration that merged two user tables, reconciling 1.9 million rows over a weekend.
Associate Software Engineer, Varnika Software Services · July 2019 – May 2020
- Delivered four client web applications on Django and jQuery, each accepted without a rework cycle.
- Replaced a hand-run deployment checklist with a scripted release, cutting a production deploy from 90 minutes to 12.
Projects
- Invoice Kit — An open-source Node library that generates GST-compliant invoices and e-way bill payloads.
Education
- B.E. Computer Science and Engineering · Vasavi College of Engineering · August 2015 – May 2019
Skills
- Languages: TypeScript, JavaScript, Python, SQL, Go
- Stack: Node.js, React, PostgreSQL, Redis, Docker, AWS
- Practice: Payment integrations, Database migrations, Query tuning, On-call and incident review
Certifications
- AWS Certified Developer – Associate — Amazon Web Services
