Ayush Kumar

I’m a Senior Java Developer with 6+ years in Core Java, Java 8, Spring Boot, REST APIs, and microservices. I focus on system design and scalable architecture, and I’ve led delivery of fintech solutions end to end.

I build secure, event-driven services using Spring Boot, Kafka, JWT, API Gateway, Feign client communication, and reliable data access with Spring Data JPA, Hibernate, and SQL databases. I also developed an AI-powered RAG microservice with automated document ingestion, semantic search, vector-based retrieval, and Redis caching to improve response times and scalability.

I operationalize what I build: Docker and Azure-based deployments, enterprise-grade CI/CD with GitHub Actions and Docker, and observability with Datadog for latency analysis and bottleneck fixes across distributed services. I’ve also delivered L2 client support, ensuring seamless integrations and 99% uptime on production systems.

Across banking and payments domains, I’ve worked on integration-heavy projects like PG integration, loan and ECU approval workflows, and middleware REST API creation—plus security and performance testing using OWASP guidance, JMeter, and BurpSuite. I enjoy collaborating with business and technical teams to turn requirements into reliable, maintainable backend systems.