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 transforming legacy systems into cloud-native, secure microservices using Java 8/11, Spring Boot, and REST APIs.
• Skilled in building resilient backend services, leveraging Apache Kafka for real-time messaging and distributed architecture.
• Proficient in deploying containerized microservices to AWS (EC2, S3, RDS, IAM) using Docker and Kubernetes, ensuring high availability and scalability.
• Strong expertise in CI/CD automation using Jenkins, Maven, and Git, optimizing deployment cycles.
• Experienced in API security (Spring Security, JWT, HTTPS/SSL) and data integrity management (PostgreSQL, MongoDB).
• Well-versed in Agile delivery, TDD with JUnit/Mockito, and proactive monitoring with AWS CloudWatch, SLF4J, and Logback.
TECHNICAL SKILLS
Backend Technologies
Java 7/8/11, Spring Boot, Spring MVC, Spring Data JPA (Hibernate), Spring Security, RESTful APIs, Microservices, JAX-RS, Servlets.
Cloud & DevOps
AWS (EC2, S3, RDS, IAM, CloudWatch), Docker, Kubernetes, Jenkins, CI/CD Pipelines.
Messaging & Streaming
Apache Kafka
Databases
PostgreSQL, SQL Server, MongoDB, SQL
Security
Spring Security, JWT, HTTPS/SSL, Role-Based Access Control (RBAC)
Logging & Monitoring
Log4j, SLF4J, Logback, Spring Boot Actuator, AWS CloudWatch
Testing
JUnit, Mockito, Spring Boot Test
Build & Version Control
Maven, Git, IntelliJ IDEA, Eclipse IDE, SVN.
API Documentation & Collaboration
Swagger / OpenAPI, Postman, Confluence, JIRA, ServiceNow
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, including job postings and payroll processing, using Java 11, Spring Boot, and RESTful APIs.
•Secured APIs with Spring Security, JWT, and Role-Based Access Control (RBAC), ensuring secure data access and compliance.
•Containerized microservices using Docker and orchestrated deployments on AWS EC2 using Kubernetes, providing high availability and scalability.
•Managed and optimized data persistence with MongoDB, ensuring efficient data storage, retrieval, and query performance.
•Monitored application health and performance using AWS CloudWatch, proactively identifying and resolving issues.
•Automated CI/CD pipelines using Jenkins, streamlining build, test, and deployment processes for faster releases.
•Leveraged AWS RDS for structured data storage and S3 for managing payroll-related documents, ensuring secure and scalable data management.
•Collaborated with cross-functional teams to ensure secure, scalable, and efficient application deployment on AWS (EC2, S3, IAM, CloudWatch).
Achievements:
•Spearheaded the launch of the Healthcare Reimbursement Plan (HRP) module, reducing reimbursement processing time by 40%.
•Enhanced MongoDB query performance by 30%, optimizing data retrieval and improving application response time.
•Achieved 85%+ test coverage using JUnit 5 and Mockito, ensuring high code reliability and maintainability.
Tools & Technologies:
Java 11, Spring Boot, Spring Security, REST APIs, Docker, Kubernetes, MongoDB, AWS (EC2, S3, RDS, IAM, CloudWatch), Jenkins, Git, IntelliJ, JUnit 5, Mockito, Spring Boot Test, Swagger, Postman.
Senior Java Consultant
John Lewis Partners and Waitrose June 2021 – Jan 2025
Key Responsibilities:
•Developed and maintained scalable microservices for Dynamic Booking and Scheduling (DBS), Route Planning, and Delivery Tracking using Java 11, Spring Boot, and RESTful APIs.
•Designed secure APIs with Spring Security, JWT, HTTPS/SSL, and Role-Based Access Control (RBAC), ensuring data integrity and secure access control.
•Leveraged Apache Kafka for asynchronous, event-driven messaging, enabling real-time communication between services.
•Containerized services using Docker and deployed them to Kubernetes on AWS (EC2, S3, IAM), achieving seamless scalability and zero-downtime deployments.
•Integrated with MongoDB for data persistence, optimizing storage and retrieval for DBS, route planning, and delivery tracking modules.
•Automated CI/CD pipelines using Jenkins, streamlining build, test, and deployment workflows for reliable releases.
•Implemented GPS-based route optimization using Sygic API, enhancing real-time delivery tracking and driver navigation accuracy.
•Secured mobile deployments via Airwatch MDM for Zebra TC57 devices, ensuring secure and compliant application distribution.
•Monitored application performance using AWS CloudWatch, with proactive alerting and diagnostics through Slack and ServiceNow.
Achievements:
•Increased scalability and deployment speed by 40% through Docker-based microservices and Kubernetes orchestration on AWS.
•Reduced API response time by 30% through optimized request handling and asynchronous processing.
•Enhanced GPS-based delivery accuracy by 30% using Sygic API, improving customer satisfaction.
•Achieved 90%+ test coverage using TDD (JUnit 5, Mockito), reducing production issues and improving code quality.
Tools & Technologies:
Java 11, Spring Boot, Spring MVC, REST APIs, Microservices, Spring Security, JWT, RBAC, Apache Kafka, MongoDB, AWS (EC2, S3, IAM, CloudWatch), Docker, Kubernetes, Jenkins, Git, IntelliJ, JUnit 5, Mockito, Swagger, Postman, Airwatch MDM, Sygic API, Slack, ServiceNow, JIRA.
Senior Software Engineer
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
Associate Software Engineer
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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