Pankaj Kumar

Senior Java & Spring Boot Developer

"Crafting Robust Solutions with 10+ Years of Java, Spring Boot, and Hibernate Expertise."

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About Me

Welcome! I'm Pankaj Kumar, a passionate software developer with over 10 years of experience specializing in building scalable and efficient enterprise applications. My journey into software development began with a fascination for problem-solving and a drive to create impactful solutions.

I possess deep expertise in Java, Spring Boot, and Hibernate, focusing on designing, developing, and deploying robust, high-performance backend systems. I thrive on architecting clean, maintainable code and optimizing application performance to deliver seamless user experiences.

Beyond the code, I'm committed to continuous learning and contributing to the tech community. I believe in the power of well-designed systems to solve real-world challenges.

Skills & Technologies

Core Backend

  • Java (JDK 8+, Multithreading, Concurrency)
  • Spring Boot (Spring Data JPA, Spring Security, Spring MVC, Microservices)
  • Hibernate / JPA
  • Maven, Gradle

Databases

  • SQL (PostgreSQL, MySQL, Oracle)
  • NoSQL (MongoDB)

Cloud & DevOps

  • AWS (EC2, S3, RDS, Lambda)
  • Docker
  • Kubernetes
  • Git / GitHub / GitLab
  • CI/CD (Jenkins, GitLab CI, GitHub Actions)

Other Relevant Skills

  • RESTful APIs, GraphQL
  • System Design & Architecture
  • JUnit, Mockito
  • Mentorship & Code Review

My Projects

Enterprise Order Management System

Developed a scalable backend for an order management system, handling high transaction volumes and complex business logic.

Technologies: Java, Spring Boot, Hibernate, PostgreSQL, RESTful APIs

My Role: Led backend development, designed database schema, implemented core business logic and integrations.

GitHub Repo

Microservices-based User Authentication

Designed and implemented a secure, microservices-based authentication and authorization service.

Technologies: Java, Spring Boot, Spring Security, JWT, MongoDB, Docker

My Role: Architected the microservice, developed authentication endpoints, managed security configurations.

GitHub Repo

Real-time Data Processing Dashboard

Built a backend service for real-time data aggregation and processing, feeding a dynamic dashboard.

Technologies: Java, Spring Boot, Apache Kafka, Redis, MySQL

My Role: Developed data ingestion pipelines, implemented data processing logic, ensured data consistency.

GitHub Repo

My Experience

Technical Manager | [EY GDS ]

[july 2025 – Present]

  • Lead Development: Lead the development of complex software solutions.
  • High-quality Code: Ensure code is efficient and maintainable; well-architect Microservices.
  • Technical Guidance: Provide mentorship and architectural input.
  • Collaboration: Work closely with cross-functional teams.
  • Code Reviews: Conduct thorough reviews for quality assurance.
  • Problem Solving: Resolve technical issues efficiently.
  • Emerging Technologies: Stay updated on the latest advancements.
  • Continuous Improvement: Foster innovation and optimisation.
  • Project Success: Contribute to project success through collaboration.

Tech Lead | [ Deloitte ]

[Sep 2023 – July 2025]

  • Developed and maintained features for high-volume applications, utilizing Java and Spring Framework.
  • Optimized database queries and refined ORM mappings with Hibernate to enhance application efficiency.
  • Collaborated with cross-functional teams to define requirements and deliver solutions on schedule.

Senior Software Engineer | [ OATI ]

[Nov 2021 – Sep 2023]

  • Project Experience: Worked on OATI's Business intelligence and recommendation tool as a Backend Developer; handled Datadog and Pagerduty integration, RESTful API development, and implemented Observability and Monitoring (Kafka). Served as Scrum Master and handled LLD and HLD.
  • Current Tech Stack: Spring Boot 2.0, Hibernate, Microservices, AWS Lambda, Amplify, S3, EC2, and ELB.
  • Core Competencies: Java Backend, Java Spring Boot, Distributed Systems.
  • Database & Cloud: MySQL, NoSQL, SQLite, MongoDB, PostgreSQL, AWS (Lambda, EC2, S3, EBS, RDS, Athena, DynamoDB, Pinpoint, Glue, Firehose), GCP Compute, and Azure.
  • DevOps: Docker, Kubernetes, Jira, Confluence, Linux Administration.

Education

MTech in Cloud Computing | IIT Patna

2021

M.Tech in Cloud Computing from IIT Patna, with strong expertise in distributed systems, cloud architecture, and scalable application design. Hands-on experience with modern cloud platforms, backend systems, and performance optimization.

BTech in ECE | CUSAT Kerala

2019

B.Tech in Cloud Computing from Cochin University Science And Technology Kerala, with strong expertise in Operating Systems, RToS, Micro-Processor architecture, and scalable System design. Hands-on experience with modern computer networking protocol, state machine systems, and performance optimization.