Lead & Mentor: Spearheaded weekly code reviews and technical grooming sessions for a cross-functional Agile team, reducing production bugs by 20% through the enforcement of rigorous unit testing (JUnit/Jasmine).

Architected & Managed Migration: Led the end-to-end migration of mission-critical financial modules from Java 11 to Java 17, leveraging modern JVM features to reduce memory overhead by 15% and improve application startup times.

API Performance Engineering: Optimized enterprise Spring Boot microservices and Elasticsearch caching strategies, resulting in a 40% reduction in API latency for high-traffic dashboard data.

Infrastructure & Scalability: Partnered with DevOps to orchestrate containerized deployments using AWS ECS and Kubernetes, achieving 99.9% uptime and enabling seamless auto-scaling during peak financial reporting periods.

Security & Compliance: Hardened backend security by implementing OAuth 2.0 and JWT-based authentication, ensuring all integrations with third-party payment APIs met strict PCI-DSS regulatory standards.

UI Modernization: Directed the development of responsive, high-fidelity dashboards using React 18 and TypeScript, establishing a reusable component library that accelerated frontend delivery by 30%.

Full Stack API Development: Developed and maintained a hybrid API architecture using RESTful and GraphQL with Spring Boot, improving data fetching efficiency for mobile and web clients by 25%.

Cloud-Native Solutions: Engineered serverless workflows using AWS Lambda and the Serverless Framework, reducing monthly infrastructure costs by 18% through event-driven task automation.

Data Integrity & High Availability: Managed complex SQL Server and NoSQL database schemas, implementing indexing and partitioning strategies to support high-availability systems with zero data loss.

Observability & Monitoring: Integrated Prometheus, Grafana, and ELK stack for real-time system health monitoring, cutting the Mean Time to Resolution (MTTR) for production incidents by 35%.

Mentorship: Directly mentored 3 junior developers, guiding them through technical onboarding and architectural best practices, leading to two promotions within the team.