At Razorpay I have worked as part of a number of teams during my stint. Mentioning my team wise major contributions:Capital Collections- Designed a loan life-cycle management system and scaled it from 0 to 1 for multiple B2B lending products: Corporate Cards, Line Of Credit, and EMI Loans- Built key flows like loan configuration, installment generation, repayment attribution, interest waivers and DPD triggers- Automated collections via NACH mandate leveraging Razorpay payments service along with auto debit flow (scheduled and enforced) from merchant PG balance- Integrated with multiple NBFC partners to support loan disbursement, collection and recon flowsRazorpayX Postpaid- Wrote a new micro-service for the product line from scratch following DDD best practices- Implemented key components like worker, transitions and error packages - Added CI actions for PRs via Github workflows- Single-handedly implemented the entire post-go-live user journey for the product, spanning development across 3 different micro-services with live traffic- Provisioned the necessary infrastructure resources for the MVP using Terraform- Created all the backend APIs to support the merchant dashboard- Ensured high quality and zero breakages on production by following TDD and writing E2E test cases for critical scenariosCorporate Credit Cards- Enabled credit card statement generation capability in the backend using wkhtmltopdf and uploading it to AWS S3- Integrated capital-cards backend with Aftership to develop a card delivery tracking flow, reducing delivery-related support tickets by 90% and tracking over 8000 card deliveriesTechnical Initiatives- Devised an alerting system by leveraging existing data sources to drive proactive incident detection and mitigation- Architected the devent library, contributed it to Razorpay's goutils repository- Implemented Canary Deployments for Golang micro-services using Kayenta analysis to facilitate seamless releases

- Designed a RBAC user management dashboard to control available actions on the Lead Management System- Built various RESTful APIs which serves data to the JavaScript front-end based on dynamically chosen user inputs- Reviewed PRs, fixed bugs, improved the test coverage and documentation

- Implemented PII data encryption and hashing for Shiksha.com users- Developed a decentralized cryptographic utility library for secure storage, search and retrieval of encrypted data - Automated key management by developing a Key Management Service to rotate keys using AWS Vault

- Revamped the Asset Management Dashboard for portfolio managers. - Added data filtering and visualization capability using Highcharts- Optimized a number of complex database queries to improve the response time of APIs used by the dashboard