Open to opportunities

Rajeev Ranjan

@rajeevranjan5

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Senior backend and full-stack engineer building scalable Java microservices and performant fintech systems.

India

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What I'm looking for

I seek a technical leadership role where I can design scalable microservices, improve performance, mentor engineers, and work in a collaborative, product-focused, cloud-native team.

I am a Senior Backend / Full-Stack Engineer with 8+ years of experience designing and delivering production-grade, low-latency backend systems and enterprise web applications, primarily for fintech and SaaS domains. I specialize in Java (8–17), Spring Boot, microservices, Kafka, Redis, PostgreSQL/MySQL, and cloud-native deployments, and I also contribute hands-on to Angular frontends to ensure tight backend–frontend integration.

Throughout my career I have led monolith-to-microservices decompositions, achieved an ~80% reduction in critical API response times through refactoring and caching, and built monitoring and alerting solutions that improved operational productivity. I collaborate across product, DevOps, QA, and frontend teams, mentor junior engineers, and focus on clean architecture, performance tuning, and delivering reliable production systems for banking and fintech clients.

Experience

Work history, roles, and key accomplishments

Current

Technology Lead

Current

Infosys Limited

Oct 2022 - Present (3 years 3 months)

Designed and developed scalable REST APIs and microservices with Java/Spring Boot and contributed to Angular frontend modules; reduced critical API response time ~80% and led monolith-to-microservices decomposition to improve scalability and deployment velocity.

Java Spring Boot Microservices Redis Angular Kafka PostgreSQL Docker Kubernetes

Senior Consultant

Capgemini

Dec 2021 - Oct 2022 (10 months)

Built a centralized portal monitoring system aggregating health and metrics across enterprise applications and designed alerting (Email/SMS) that improved operational productivity by ~20%.

Java Spring Boot Monitoring Alerting REST APIs SQL AWS CI CD Troubleshooting

Senior Software Engineer

Nucleus Software

Dec 2018 - Nov 2021 (2 years 11 months)

Developed and maintained core modules of an enterprise Loan Management System, delivering end-to-end workflows for loan booking, document and collateral handling, improving code quality through reusable components.

Java Spring REST APIs PostgreSQL Design Patterns Testing

Technical Associate

Evoke Technologies

Aug 2017 - Dec 2018 (1 year 4 months)

Contributed to a Domain Management Platform supporting domain registration, DNS management, and digital certificate services, gaining fundamentals in backend development and system integration.