Rushwant K

About

Backend engineer with experience at Discover, Dell, and Carpus building high-concurrency microservices and secure APIs. Delivered measurable impact in fintech workflows by integrating credit bureaus (TransUnion/Experian), cutting loan processing from days to minutes and reducing latency 65% through PostgreSQL tuning and caching. Strong in production security patterns (JWT/RBAC, Postgres row-level security for multi-tenant isolation) and low-risk migrations (shadow mode + incremental rollout).

Experience

Education

Key Strengths

• Designed real-time credit profile verification service integrating external bureaus (TransUnion/Experian)
• Reduced data retrieval latency by 65% via PostgreSQL indexing and caching
• Cut loan processing timelines from days to minutes through high-concurrency microservice architecture
• Balances performance vs. complexity (isolating slow external integrations; availability vs. consistency tradeoffs)
• Contract-first API development in FastAPI using Pydantic schemas and auto-generated Swagger docs
• Scalable stateless security using JWT middleware and role-based access control
• Led backend refactor with shadow-mode validation and incremental traffic migration to reduce rollout risk
• Implemented database-enforced tenant isolation using PostgreSQL row-level security tied to JWT identity
• Improved batch processing resilience by isolating malformed records (poison pill mitigation) and committing valid records