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Debayan Singha
Senior Full-Stack Engineer · 10 years
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I build and ship production web systems — Node.js, React, AWS, Kafka, Kubernetes — and I've spent the last stretch getting genuinely fast with AI-assisted tooling, not just talking about it. Currently open for freelance and fractional engineering work.
environment
git log --oneline
Loan-disbursal workflow for Jiraaf, an NSE-approved bond investment platform
Built the payment pipeline end-to-end with AI-assisted development — PayU/Freecharge integration, transaction review, gateway health checks, settlement validation, and borrower disbursal. One of two engineers owning this critical financial functionality.
KYC & regulatory compliance workflow, including a profile-page redesign
Backend verification logic and PostgreSQL data models for KYC requirements, built with AI-assisted tooling to move fast without sacrificing correctness. Also refactored legacy frontend business logic into backend services for better maintainability.
Led Vue 2 → Vue 3 migration on a large-scale production SaaS platform
Used AI-assisted tooling throughout the migration to the Composition API, including complex customer-facing workflows like the Conversations platform. Balanced speed with long-term maintainability — refactored legacy systems along the way.
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