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Nandukrishna S

@nandukrishnas

Message

I build reliable fintech payment platforms, APIs, and high-performance backend systems.

India

Message

At OpenFinancial Technologies, I’ve owned backend delivery for subscription management, KYC onboarding, connected banking, invoice processing, and payment workflows. I built Golang microservices and Laravel services for billing, fraud detection, RBAC, secure bank integrations, and production-grade API platforms.

I delivered a 2,500% performance improvement for a bulk invoice API, reducing single-record processing from 5 seconds to 130–148ms and scaling throughput to 250 records per request. I also lead cross-functional releases, production incident resolution, and stakeholder communication across backend, frontend, QA, DevOps, product, and banking teams.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

OpenFinancial Technologies

Aug 2023 - May 2026 (2 years 9 months)

Acted as technical SPOC for multiple product modules, leading cross-functional delivery and owning production support. Architected and built a subscription management microservice in Golang, integrated payment infrastructure, and optimized a bulk invoice API achieving a 2,500% performance improvement.

Go PHP Laravel Gin Microservices RBAC MySQL PostgreSQL Docker Kubernetes AWS Retry Exponential backoff Hybrid Encryption RSA KYC DigiLocker Fraud Detection CI CD

Software Engineer

OpenFinancial Technologies

Apr 2021 - Jul 2023 (2 years 3 months)

Developed backend APIs and services in Golang and Laravel across payment flows, transaction processing, and bank API integrations. Designed database schemas, implemented indexing strategies, and optimized queries for production databases.

Go PHP Laravel Gin MySQL PostgreSQL Indexing Query Optimization KYC Aadhaar Fraud Detection

Flutter Developer

Early-Stage Startup

Jan 2020 - Jun 2020 (5 months)

Built cross-platform mobile UI components using Flutter and Dart, gaining early exposure to the full product development lifecycle in a fast-moving startup environment.

Flutter Dart Mobile Development UI Components