Hanuman Kumar Singh

Hanuman Kumar Singh

Java Spring Boot Developer | Full-Stack Engineer

Jamshedpur, India

#OpenToWork

About

Java Spring Boot Developer with 4+ years of experience building scalable backend systems, enterprise REST APIs, and microservices. Primary expertise in Spring Boot, Spring MVC, Spring Security, Spring Data JPA, and Hibernate, with additional hands-on experience in Node.js/Express.js for backend services. Proficient in event-driven architecture using Kafka and RabbitMQ, Redis caching, Angular frontend, Flutter mobile, and end-to-end AWS cloud deployments with CI/CD automation. Willing to contribute significantly, improve processes, & lead the team for overall growth.

What I'm looking for

Java Full Stack Developer with 4 years of experience in Java, Spring Boot, Microservices, REST APIs, Angular, React, MongoDB, and SQL. Looking for remote opportunities where I can contribute to scalable backend and full stack applications, collaborate with strong engineering teams, and continue growing technically. Immediate joiner and open to product-based or startup environments.

Experience

Smartly Built

Software Developer

Smartly Built

Feb 2024 – Present

Developing and maintaining JackTrade CRM (500+ screens) — a large-scale monolithic Spring Boot & Angular application; owning full SDLC end-to-end in cross-functional Agile teams. Building Spring Boot REST APIs with Spring Data JPA & Hibernate; implementing multi-tenant architecture with Spring Security RBAC for enterprise client data isolation. Working on Greyter IoT platform using Node.js/Express; integrating Apache Kafka for device event streaming & RabbitMQ for async task processing; Redis caching reducing API latency by ~40%. Automating CI/CD with Jenkins, Docker & Kubernetes on AWS; monitoring production with Prometheus, Grafana & CloudWatch.

Spring BootAngularAWS

Software Developer

Indoc Web Solutions Private Limited

Mar 2023 – Jan 2024

Building Spring Boot REST APIs for mobile app backends using Spring Data JPA & MySQL/PostgreSQL; optimising queries and reducing average response time by ~30%. Developing and delivering Flutter mobile applications end-to-end (iOS & Android); managing state with Provider & BLoC, integrating Firebase & third-party SDKs. Performing continuous bug fixing, performance optimisation, and feature implementation across both backend and mobile layers.

Spring Data JPAFlutterFirebase

Software Developer

Mindful Machines Pvt Ltd

Apr 2022 – Feb 2023

Developed Spring Boot RESTful APIs and Node.js backend services for web apps (Urban Kirana, Near Bajar); optimising JPA/Hibernate queries and MongoDB aggregations for high-load scenarios. Contributing to scalable system design and distributed architecture discussions; adapting to multiple team workflows, tech stacks, and SDLC stages across concurrent projects.

Spring BootNode.jsMongoDB

Education

University of Engineering and Management, Jaipur

B.Tech in Computer Science & Engineering · Computer Science & Engineering

2019 – 2023

Certifications

Skills

MySQLReact.jsAngularExpress.jsNode.jsDartSQLTypeScriptJavaScriptJavaAgile/ScrumSystem DesignCI/CD PipelineDatabase DesignEvent-Driven SystemsSpring BootREST API Design

Languages

English (Professional working proficiency)