Senior Java Microservices Engineer (AWS)

SANDEEP KUMAR BOLLAM

Irving, Texas 901-***-**** ****************@*****.*** linkedin.com/in/sandeep-b-a936b5315/

SUMMARY

Software Engineer with around 7+ years of experience building large scale distributed microservices. Delivered a migration of legacy Exchange integrations to Microsoft Graph APIs, markedly raising security and scalability, and boosted Java backend throughput by 40% through concurrency and multithreaded redesign. Designed and launched cloud native platforms on AWS leveraging Docker, Kubernetes and Kafka, and instituted CI/CD pipelines that elevated engineering velocity and reliability.

SKILLS

Backend & Core Java: Java (8, 11, 17, 21), Spring Boot, Spring Cloud, REST APIs, Microservices, Object Oriented Design (OOD), Design Patterns, Multithreading Concurrency, System Design, Distributed Systems, Node.js, Data Structures, Algorithms, Python, Spring, RESTful web services, Object-oriented programming

Cloud & DevOps: AWS (EC2, S3, Lambda, API Gateway), Azure, Docker, Kubernetes, Jenkins, TeamCity, Maven, SonarQube, Git, CI/CD pipelines, Linux, Shell Scripting, Terraform, Containerization

Data & Messaging: SQL, Oracle, PostgreSQL, MongoDB, MySQL, Kafka, JMS, AWS SQS/SNS, Elasticsearch

Frontend & Web Technologies: Angular, React, HTML5, CSS3, TypeScript, JavaScript

Security & Identity Management: OAuth2, JWT, CyberArk, Microsoft Graph API, IAM Platforms, Authentication Standards

Build & Release: Configuration & Release Management, Design & Build Enablement, Build Management

Monitoring & Development Tools: Splunk, AppDynamics, GitHub Copilot, AI tools, JUnit, Mockito, Swagger, Agile/Scrum, SDLC, Production Support (L3)

EXPERIENCE

Senior Java Developer Citi Bank Irving, TX Mar 2025 – Mar 2026

•Architected migration of legacy Exchange integrations to Microsoft Graph APIs using Java and TypeScript adapters, enhancing security, scalability, and cloud interoperability while coordinating cross team collaboration and communicating roadmap to stakeholders.

•Designed fault tolerant microservices in Java, applying advanced data structures and algorithmic optimizations to handle high volume transactions, leading a team of engineers, mentoring newcomers, and ensuring operational stability through rigorous problem solving.

•Optimized backend processing by refactoring multithreaded Java services, applying concurrency algorithms and custom data structures, which reduced latency and boosted throughput by 40%, while guiding peers through code reviews and knowledge sharing.

•Engineered event driven pipelines with Kafka and Java, implementing efficient message handling algorithms and data structures to guarantee reliable asynchronous processing across services, fostering collaboration between backend and data teams.

•Enhanced platform security by integrating OAuth2 and JWT into Java microservices, establishing centralized secret management, and leading security workshops that improved team communication and compliance.

•Directed production stability program, introducing observability dashboards, proactive monitoring, and incident response playbooks, collaborating with SREs to resolve issues swiftly and mentor engineers in reliability engineering.

•Championed engineering excellence by automating CI/CD pipelines with Jenkins, instituting rigorous peer code reviews, and fostering Agile collaboration, while coaching teams on problem solving and communication best practices.

Software Engineer S&P Global Nashville, TN Oct 2023 – Mar 2025

•Engineered scalable enterprise platform with Java microservices and a TypeScript/React frontend, applying algorithmic design patterns to ensure security and resilience across distributed applications, and coordinating cross functional teams.

•Designed high throughput event driven pipelines using Kafka and Java, implementing efficient queueing algorithms and data structures that sustained reliable asynchronous transaction processing at scale.

•Improved system throughput by refactoring backend Java services with concurrency algorithms and optimized data structures, reducing processing time and enhancing operational efficiency.

•Built cloud native Java applications on AWS, orchestrated with Kubernetes, automating deployments via CI/CD pipelines, and mentoring engineers on container best practices.

•Developed secure REST APIs in Java with OAuth2 and JWT, integrating federated identity, and leading cross team communication to align security standards.

•Enhanced engineering quality by establishing automated JUnit test suites, rigorous code review processes, and CI/CD release pipelines, fostering a culture of continuous improvement and collaborative problem solving.

Software Developer HCA Healthcare Nashville, TN Jan 2023 – May 2023

•Developed scalable healthcare backend with Java, Spring Boot, and microservices, employing object-oriented design, design patterns, and optimized data structures to ensure secure, reliable patient data processing.

•Engineered secure distributed microservices for patient data workflows, applying algorithmic validation and collaborating with cross functional teams to meet compliance.

•Designed HIPAA compliant REST APIs with OAuth2/JWT, implementing fine grained authorization and data protection, while mentoring junior developers on security best practices.

•Improved application performance by optimizing Java concurrency, tuning SQL queries, and applying algorithmic enhancements to processing pipelines.

•Built resilient cloud native services on AWS, automating deployments with Docker/Kubernetes, and guiding teams in fault tolerant design and operational monitoring.

•Supported production reliability via proactive monitoring, incident response, and collaborative troubleshooting, improving mean time to recovery through shared knowledge sessions.

Java Full Stack Developer Verizon Hyderabad, India Mar 2019 – Jul 2021

•Built scalable cloud-based applications with Java backend and responsive JavaScript/TypeScript front ends using React, delivering enterprise scale business operations and enhancing user experience.

•Developed modern frontend experiences in React with TypeScript, integrating with Node.js services and Java APIs, and coordinating with backend teams to ensure seamless data flow.

•Automated CI/CD pipelines with Jenkins and Docker, managing cloud environments, and mentoring team members on deployment best practices, boosting productivity and release reliability.

Java Developer UnitedHealth Group Hyderabad, India Jun 2016 – Feb 2019

•Developed enterprise healthcare applications supporting large scale billing, transaction processing, and backend service integration workflows.

•Built secure microservices and asynchronous messaging solutions enabling reliable communication across distributed healthcare systems.

•Contributed across the full software development lifecycle including architecture, implementation, deployment, production support, and system optimization.

EDUCATION

University of Memphis USA Aug 2021 – Apr 2023 Master of Science, Management Information Systems

Kakatia Institute of Technology and Science Warangal, India Aug 2012 – May 2016 Bachelor of Technology, Computer Science and Engineering

Contact this candidate