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Krishna Lella
Mid-level Full-Stack Developer specializing in FinTech platforms
New York, NYFullStack Developer4 years experienceMid-LevelFinTechFinancial ServicesInsurance
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About
Product-focused full-stack engineer who built and shipped subscription/billing features end-to-end (FastAPI + React/TypeScript), including a self-serve cancellation flow with save-offers that reduced support tickets and improved churn insights. Experienced operating on AWS (ECS/EC2, RDS, S3/CloudFront) and handling real production scaling incidents through DB/query optimization, idempotent API design, and strong observability practices.
Experience
FullStack DeveloperPayPal
Full Stack DeveloperAllstate
Education
St. Francis Collegemaster, Information Systems
Key Strengths
- Shipped end-to-end self-serve subscription cancellation flow (backend + frontend) replacing manual support process
- Designed safe, trackable subscription state changes with idempotent APIs to handle retries/double-clicks
- Billing/payment provider synchronization (Stripe) with robust error handling and logging
- Customer-facing product engineering focus (70–80% application-layer work)
- Improved retention funnel via save-offer step (pause/downgrade) and captured churn reasons for insights
- Reduced support tickets after rollout (self-serve cancellation)
- Built production Python/FastAPI services with layered architecture, JWT/RBAC, tests, and observability
- Performance optimization via query/index tuning and offloading heavy work (webhooks) to async jobs
- AWS production operations and incident response: diagnosed latency spike, optimized DB usage, and scaled services
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