Headline

Senior Java Backend Engineer | Fintech Payments | Java 21, Spring Boot, Kafka, AWS | Secure Microservices for 500K+ Users

About

Senior Java Backend Engineer with 4+ years of experience in Java backend development, Microservices, Distributed Systems, and Fintech Payment Platforms using Java (8/17/21), Spring Boot, Apache Kafka, AWS, PostgreSQL, and Redis. I specialize in designing secure, high-performance backend systems that handle large-scale workloads while maintaining reliability, scalability, and strong security standards. Key achievements: • Secured access for 500,000+ users using Keycloak, ForgeRock, OAuth2, and OIDC-based IAM solutions • Reduced API latency by 30% through microservice optimization, database tuning, and distributed architecture improvements • Cut manual fraud detection processing time by 40% using Spring AI and GenAI integrations • Improved service reliability using event-driven architecture, Saga orchestration, Circuit Breaker patterns, and fault-tolerant microservice design • Accelerated deployment cycles by 80% through Docker, Kubernetes, and CI/CD automation Core expertise: Java (8/17/21) • Spring Boot • Spring Security • Spring AI • Microservices • REST APIs • Apache Kafka • PostgreSQL • Redis • AWS • Docker • Kubernetes • OAuth2 • OIDC • Keycloak • Distributed Systems • Event-Driven Architecture • System Design I enjoy solving complex backend challenges involving scale, security, performance optimization, and distributed systems, and I'm particularly interested in building products that serve millions of users with reliability and efficiency. 📩 dhruv.rbs.java@gmail.com

Location

Hyderabad

AI stack

antigravity

codex

Work experience

Senior Software Engineer at TAD International Business Services, Jul 2025 - Present · 1 yr 2 mos, Kolkata, West Bengal, India, • Architected and scaled distributed backend services using Java 21, Spring Boot, and Apache Kafka, building high-throughput REST APIs and event-driven workflows for fintech payment processing and transaction orchestration. • Led development of the EMV Proxy Service for secure POS device onboarding and API key management, leveraging Spring Boot, Redis, and Server-Sent Events (SSE) to improve real-time device communication performance by 50%. • Drove GenAI integration using Spring AI to automate fraud-detection workflows, reducing manual review effort by 40% and accelerating operational decision-making. • Designed and implemented enterprise IAM solutions using Keycloak, ForgeRock, OAuth2, and OIDC, securing authentication and authorization for 500,000+ internal and external users. • Implemented resilience patterns including Saga orchestration, Circuit Breaker (Resilience4j), and fault-tolerant microservice design to improve reliability across critical payment services. • Collaborated with cross-functional Product, QA, DevOps, and Engineering teams to deliver secure, scalable, and production-ready backend solutions in Agile environments.

Java Software Developer at DigiTele Networks, Apr 2022 - May 2025 · 3 yrs 2 mos, Hyderabad, Telangana, India, • Designed and developed Java Spring Boot microservices and REST APIs for the GMAT meeting scheduling platform, streamlining resource allocation workflows and reducing scheduling conflicts by 20%. • Led backend development for the GKFS renewable energy forecasting platform, building scalable Spring Boot microservices, RESTful services, and PostgreSQL-backed applications for forecasting, scheduling, and operational reporting. • Refactored legacy monolithic application components into modular microservices architecture, improving application performance, maintainability, and scalability across critical business workflows. • Implemented secure authentication and authorization using WSO2 Identity Server, OAuth2, JWT, and Spring Security, strengthening access control across enterprise applications. • Developed backend services and REST APIs for industrial IoT monitoring systems, enabling real-time sensor data ingestion, processing, and high-throughput data delivery. • Optimized database operations, SQL queries, and backend processing workflows to improve system responsiveness and operational efficiency. • Automated CI/CD pipelines using Docker, Jenkins, Git, and deployment automation practices, reducing deployment time by 80% and accelerating software delivery cycles. • Collaborated with Product, QA, DevOps, and Business stakeholders in Agile/Scrum environments to deliver scalable, secure, and production-ready backend solutions.

Education

B.Tech, Computer Science, RAJA BALWANT SINGH ENGINEERING TECHNICAL CAMPUS, AGRA

Public links

github: https://github.com/dhruvjava