Backend Developer Spring Boot
Resume:
SUNDEEP HAZARI
Java Backend Developer
*************@*****.***
H1-B Visa
PROFESSIONAL SUMMARY
•Results-oriented Java Backend Developer with 11+ years of experience in designing, developing, and deploying scalable enterprise applications across healthcare, e-commerce, and industrial domains.
•Proven track record of modernizing legacy systems into cloud-native microservices using Java 8/11, Spring Boot, REST APIs, and Spring Security.
•Expert in building robust backend services and implementing event-driven systems using Apache Kafka.
•Proficient in deploying containerized microservices to AWS using Docker and Kubernetes, leveraging EC2, S3, RDS, and IAM for high availability and scalability.
•Strong experience in CI/CD automation using Jenkins, Maven, and Git, optimizing release cycles and deployment reliability.
•Adept in managing relational (PostgreSQL, SQL Server) and NoSQL (MongoDB) databases with a focus on performance and data integrity.
•Well-versed in secure authentication (JWT, RBAC) and monitoring via CloudWatch, SLF4J, and Logback.
•Committed to agile development practices, clean coding, and TDD with JUnit and Mockito.
•Strong team collaborator experienced in Agile/Scrum environments, contributing to sprint planning, code reviews, and cross-functional delivery.
TECHNICAL SKILLS
Backend Technologies
Java 11/8, Spring Boot, Spring MVC, Spring Data JPA (Hibernate), Spring Security, RESTful APIs, Microservices, JAX-RS, Servlets
Databases
PostgreSQL, SQL Server, MongoDB, SQL
Cloud & DevOps
AWS (EC2, S3, RDS, IAM, CloudWatch), Docker, Kubernetes, Jenkins, CI/CD Pipelines
Messaging & Streaming
Apache Kafka
Build Tools
Maven
Version Control & IDEs
Maven, Git, IntelliJ IDEA, Eclipse IDE, SVN
Logging & Monitoring
Log4j, SLF4J, Logback, Spring Boot Actuator, AWS CloudWatch
Testing
JUnit, Mockito, Spring Boot Test
API Documentation & Collaboration
Swagger / OpenAPI, Postman, Confluence, JIRA, ServiceNow
Security
Spring Security, JWT, HTTPS/SSL, Role-Based Access Control (RBAC)
Methodologies
Agile (Scrum), CI/CD, TDD, Code Reviews, Sprint Planning
PROFESSIONAL EXPERIENCE
Senior Java Developer
Slate Healthcare LLC Jan 2025 – Present
Key Responsibilities:
•Designed and developed scalable microservices for HR operations such as job postings and payroll processing using Java 11, Spring Boot, and RESTful APIs.
•Implemented asynchronous communication using Apache Kafka, enhancing modularity, system responsiveness, and throughput.
•Secured APIs with Spring Security, JWT, and Role-Based Access Control (RBAC) to ensure secure access and regulatory compliance.
•Containerized applications with Docker and orchestrated seamless deployments on AWS EC2 using Kubernetes.
•Engineered high-performance MongoDB schemas and integrated AWS CloudWatch for proactive system monitoring and logging.
•Automated CI/CD pipelines with Jenkins, significantly reducing manual intervention and improving deployment efficiency.
•Utilized AWS RDS for structured data storage and S3 for managing payroll-related documents and attachments.
Achievements:
•Spearheaded the launch of the Healthcare Reimbursement Plan module, improving processing time significantly.
•Enhanced MongoDB query performance and achieved 80%+ test coverage with JUnit 5 and Mockito.
Tools & Technologies:
Java 11, Spring Boot, Spring Security, REST APIs, Kafka, Docker, Kubernetes, MongoDB, Jenkins, AWS (EC2, S3, IAM, CloudWatch), Git, JUnit 5, Mockito
Senior Java Consultant
John Lewis Partners and Waitrose June 2021 – Jan 2025
Key Responsibilities:
•Developed and maintained microservices for logistics, route planning, and booking using Java 11 and Spring Boot, ensuring high scalability and performance.
•Integrated Apache Kafka for asynchronous, inter-service messaging, enabling real-time event handling and decoupled architecture.
•Deployed containerized services using Docker and orchestrated deployments with Kubernetes on AWS (EC2, S3, IAM) to ensure system availability and seamless scalability.
•Implemented secure APIs using Spring Security, JWT, HTTPS/SSL, and RBAC to enforce fine-grained access control across services.
•Managed and optimized data persistence using MongoDB with Spring Data JPA for efficient handling of both structured and semi-structured data.
•Designed and implemented CI/CD pipelines with Jenkins and Git, streamlining build, testing, and deployment workflows to minimize downtime.
•Implemented GPS-based route optimization using Sygic API and secured mobile deployments via Airwatch MDM on Zebra devices
•Monitored application performance and system health using AWS CloudWatch and Spring Boot Logs, proactively addressing bottlenecks and ensuring optimal uptime.
•Conducted code reviews, implemented caching strategies, and optimized backend logic for improved performance and reduced latency.
Achievements:
•Reduced API response times by 30% through asynchronous processing and effective caching strategies.
•Enhanced system observability using CloudWatch and Spring Boot Logs, improving monitoring and diagnostics capabilities across microservices.
•Achieved 85%+ unit test coverage using JUnit 5 and Mockito, resulting in a 35% reduction in post-deployment issues and improving overall system stability.
•Improved deployment efficiency by 40% through CI/CD automation, reducing manual intervention and accelerating release cycles.
Tools & Technologies:
Java 11, Spring Boot, Spring MVC, REST APIs, Microservices, Spring Security, Apache Kafka, MongoDB, AWS (EC2, S3, IAM, CloudWatch), Docker, Kubernetes, Jenkins, Git, JUnit 5, Mockito, Spring Boot Test, JWT, RBAC, HTTPS/SSL, Spring Boot Logs, Swagger, Postman, IntelliJ, Airwatch MDM, Sygic API, Slack, ServiceNow, JIRA
Senior Java Developer
AAMC Aug 2017 - June 2021
Key Responsibilities:
•Migrated legacy monolithic healthcare applications to a Spring Boot microservices architecture, improving modularity, scalability, and performance.
•Refactored Faculty Salary Service (FSS) and MCAT modules into independent RESTful microservices, enabling decoupled deployments and improved system resilience.
•Designed and deployed REST APIs using Spring MVC, integrating with internal modules and external partners for real-time data exchange.
•Managed cloud infrastructure on AWS EC2, S3, and RDS, ensuring high availability, disaster recovery, and cost optimization.
•Developed optimized relational schemas and queries in PostgreSQL, improving reporting and analytics for medical school performance.
•Implemented JWT-based authentication and role-based authorization using Spring Security to meet HIPAA compliance requirements.
•Automated builds, testing, containerization, and deployments via Jenkins, Maven, and Docker, enabling streamlined CI/CD workflows and faster delivery cycles.
•Established centralized logging and monitoring using SLF4J and Logback, simplifying system diagnostics and support operations.
Achievements:
•Successfully reduced system response time by 40% by transforming monolithic services into lightweight Spring Boot microservices.
•Decreased infrastructure costs by 20% through secure document storage using AWS S3 for MCAT data and faculty contracts.
•Achieved 90% unit test coverage, resulting in a 40% reduction in post-deployment issues.
•Cut deployment time by 50% by implementing fully automated CI/CD pipelines with Jenkins, Maven, and Docker.
•Improved cross-service query performance by 15% on Amazon RDS, enabling faster data retrieval for performance tracking dashboards.
Tools & Technologies:
Java 8, Spring Boot, Spring MVC, Microservices, REST APIs, Spring Security, JWT, Hibernate, PostgreSQL, SQL, AWS (EC2, S3, RDS), Jenkins, Maven, Git, Docker, JUnit, Spring Boot Test, TestNG, SLF4J, Logback, OAuth 2.0, Swagger, Postman, IntelliJ, Service Now, Confluence
Java Backend Developer
General Electronics Feb 2014 - Aug2017
Key Responsibilities:
•Developed and maintained backend modules in Java 7 using Servlets and JAX-RS for the eSPL system to manage spare parts for GE Energy turbines and generators.
•Designed and implemented RESTful APIs to expose spare parts inventory and enable parts list management for users and external systems.
•Integrated with COPICS, Metaphase, and SBOM platforms to fetch and synchronize spare parts data, improving real-time part validation.
•Authored and optimized SQL queries and stored procedures in SQL Server for parts retrieval, validation, and order quoting workflows.
•Consolidated disparate data sources into unified “as-running” parts lists for more accurate aftermarket support and configuration tracking.
•Contributed to feature development for quoting, ordering, and maintaining spare parts for heavy equipment such as gas turbines and steam turbines.
•Enhanced system reliability and maintainability by implementing structured logging using Log4j and documenting core functionalities.
•Participated in Agile sprints, daily stand-ups, and retrospectives, ensuring timely delivery of backlog items and active defect triaging.
•Handled manual builds and deployments using Maven and SVN, ensuring consistent delivery cycles in an on-premise environment.
Achievements:
•Improved data consistency across platforms by 20% through stable integration with external systems (COPICS, Metaphase, SBOM).
•Reduced SQL query execution time by 25%, optimizing stored procedures used in real-time spare parts validation and search.
•Reduced post-deployment defects by 30% through rigorous unit testing with JUnit and end-to-end integration testing.
•Minimized system downtime by 15% by resolving production defects quickly and improving backend reliability and logging mechanisms.
Tools & Technologies:
Java 7, Servlets, JAX-RS, SQL, Stored Procedures, SQL Server (Custom Stored Procedures), SVN, Maven, JUnit, Log4j, Basic Role-based Access, Eclipse IDE, Confluence, Inline Code Comments
CERTIFICATION : AWS Certified Solutions Architect - Associate
EDUCATION :
Bachelor of Electronics and Communications Engineering
Jawaharlal Nehru Technological University - Hyderabad, India
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