Yashwanth Sai Manthapuram

• Developed and maintained RESTful APIs in Java using Spring Boot, following object-oriented principles and SOLID design patterns for modularity and maintainability.
• Built event-driven applications using AWS EventBridge, Kinesis, and Lambda, integrated with API Gateway and DynamoDB for seamless, real-time data processing.
• Tuned SQL queries and procedures in Oracle for optimal performance, reducing latency on key reporting modules.
• Configured CI/CD pipelines with GitLab CI, integrating SonarQube for code quality, and Black for Python formatting enforcement.
• Implemented authentication and authorization using Spring Security with OAuth2 and JWT tokens, enforcing role-based access control.
• Used Redis for caching frequently accessed data, improving application response time, and lowering DB load.
• Participated in Agile ceremonies and worked closely with cross-functional teams to break down epics into deliverable user stories.
• Mentored junior developers, and reviewed code to ensure adherence to clean code standards.
• Developed unit and integration tests with JUnit and Mockito; also contributed BDD test scenarios using Cucumber.
• Monitored production services using AWS CloudWatch with custom metrics, logs, and alerting.
• Used Terraform and CloudFormation to manage infrastructure-as-code for IAM, VPC, Lambda, and API Gateway.
• Authored and maintained Swagger documentation for all developed APIs.
• Utilized Docker to containerize microservices for local and test environments, supporting ECS deployment.
• Executed Postman tests for manual API validation, and shared environment collections with QA teams.
• Collaborated with security teams to implement API hardening techniques, including throttling, logging, and error masking.

• Built microservices in Java and Spring Boot to support customer portfolio management systems, following object-oriented design and SOLID principles to ensure code maintainability and testability.
• Designed and developed front-end features using Angular for internal advisor dashboards and transaction insights, integrating tightly with secure backend APIs.
• Developed event-driven architectures using AWS services, including EventBridge, Lambda, and API Gateway, to decouple trading and notification workflows.
• Integrated PostgreSQL and MongoDB as data stores, optimizing queries, and using indexes and partitioning to handle millions of records efficiently.
• Worked within an Agile/Scrum team and participated in all ceremonies, contributing to sprint planning, refinement, and retrospectives, while helping improve estimation accuracy.
• Built CI/CD pipelines using Jenkins and GitHub Actions, incorporating quality gates with SonarQube, and automated testing using JUnit and Cucumber.
• Leveraged OAuth2 and JWT with Spring Security to enforce strict authentication and authorization standards across APIs and UIs.
• Deployed and managed containerized workloads using Docker and AWS ECS, aligning deployments with blue/green strategies for zero-downtime releases.
• Used Redis as a caching layer for frequently accessed customer and product metadata, reducing API response times by up to 40%.
• Implemented TDD and BDD practices, maintaining high test coverage across all tiers of the application, including unit, integration, and API-level tests.
• Authored Terraform modules for reusable AWS infrastructure, including IAM roles, VPC networking, ECS services, and CloudWatch alarms.
• Contributed to internal security reviews, implementing encryption in transit and at rest, along with parameterized secrets in AWS SSM.
• Worked closely with QA to validate features using Postman, and automate regression testing pipelines for nightly builds.
• Tuned and debugged AWS Lambda performance, resolving bottlenecks in cold starts and memory usage across asynchronous flows.
• Provided onboarding assistance to junior engineers, and participated in peer code reviews to support team-level technical quality.

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• Built scalable web applications using React.js, with Redux, and integrated them with secured RESTful APIs.
• Engineered backend services in Java and Python for enterprise clients, following microservices architecture and modular development.
• Implemented event streaming using AWS Kinesis, with processing through Lambda functions, and storage in DynamoDB and S3.
• Secured APIs and web apps using JWT and Spring Security, aligned with client-specific SSO implementations.
• Designed MongoDB and Cassandra schemas optimized for horizontal scalability and fast reads.
• Wrote comprehensive unit tests using JUnit, Mockito, and property-based tests in Python.
• Contributed to CI/CD pipelines using GitHub Actions to automate tests, builds, and Docker deployments to EKS.
• Used Terraform for automated provisioning of AWS resources, including IAM, VPC, RDS, and CloudWatch configurations.
• Developed Gradle multi-module builds and custom tasks for automated testing and packaging.
• Led internal code walkthroughs, and contributed reusable utilities and base templates across multiple projects.
• Logged and monitored application performance using CloudWatch metrics, dashboards, and alarms.
• Worked closely with security auditors to apply API-level security headers, throttling, and data masking.
• Collaborated in cross-functional Agile teams to deliver sprint goals, and documented REST specifications.
• Refactored legacy applications into containerized microservices using Docker, and deployed via EKS.
• Provided onboarding support and mentorship for new team members during cloud migration initiatives.