Backend Engineer - Distributed Systems Specialist

Vennapusa Charan Kumar Reddy

BACKEND ENGINEER – DISTRIBUTED SYSTEMS

Mobile No: 630-***-**** E-mail: *****************@*****.*** Address: India LinkedIn Full Stack Engineer passionate about building scalable Java and Angular applications, delivering high-quality software through clean Spring Boot microservices and modern Angular frontends in Agile environments. PROFESSIONAL SUMMARY

Backend Engineer with 4.5 years of experience designing distributed systems and high-volume microservices in Java and Spring Boot. Delivered production-grade services on GCP (AWS-familiar) with a focus on reliability, observability, and scalable architecture. GCP Professional Cloud Developer certified

SKILLS

Technical Skills: Java (8/11/17), JavaScript, TypeScript, Spring Boot, Spring MVC, Spring Data JPA, Hibernate, JPA, Angular (latest versions), HTML, CSS, RxJS, PostgreSQL, MySQL, Elasticsearch, Solr, Firestore, MongoDb, OAuth 2.0, JWT, RBAC, JUnit, Mockito, Postman, TDD, Agile/Scrum, IntelliJ IDEA, VSCode, Azure (familiar), Docker, Kubernetes, Jenkins, CI/CD, Maven, Git, GitLab, Microservices, API Gateway, System Design, REST APIs, OData, Kafka, Design Patterns, Object-Oriented Programming (OOP), Clean Code Principles, Enterprise UI Development, Data Structures & Algorithms, Linux/Unix, AI-assisted tooling(GitHub Copilot, Claude) for code generation, Jira, Confluence, GitLab, Agile Delivery WORK EXPERIENCE

Rappit

Product Engineer 2 (Feb 2025 - Present)

Delivered automated database schema migration system across SQL, PostgreSQL, BigQuery, and Elasticsearch — distributed locking, resumable workflows, audit logging, integrated with GCP Pub/Sub, Cloud Tasks, and CI/CD for multi-database synchronization. Designed cloud-native RESTful microservices on GCP (Java, Spring Boot, Docker, Kubernetes, Kafka), following SOLID principles and clean architecture for scalable, maintainable service delivery Optimized API and list screen performance by ~60%, reducing load time from ~2.5s to ~0.8s by eliminating redundant reference lookup calls using backend-maintained denormalized caching, query optimization, and O(1) client-side data resolution. Collaborated with architects and senior developers across organizational boundaries to design and develop production-grade microservices, applying clean code principles, conducting code reviews, and ensuring independent end-to-end task ownership with timely, high-quality delivery.

Investigated and resolved production incidents, performed root cause analysis (RCA), monitored application health, and implemented preventive fixes.

Rappit

Software Engineer 2 (Jan 2024 - Jan 2025)

Developed secure Java/Jersey backend services for a SaaS low-code platform, implementing OAuth 2.0, JWT authentication, and RBAC/ACL-based authorization for n-grained service-level access control. Optimized Solr batch indexing and background job pipelines using internal job engine, improving search throughput, indexing reliability, and query performance.

Built enterprise integration services supporting external API connectivity, webhook handling, secure data exchange, and workflow orchestration for business-critical operations.

Wrote unit and integration tests using JUnit and Mockito, following TDD practices, maintaining code coverage and supporting reliable service delivery within Agile/Scrum cycles.

Rappit

Associate Software Engineer (Jun 2022 - Dec 2023)

Modernized legacy backend systems by migrating ~170 services during platform transition, refactoring Java/Jersey REST APIs and service orchestration flows to improve maintainability and reduce operational complexity. Led Java 8 to Java 11 upgrade across backend services, improving compatibility, maintainability, API structure, and service-layer design Implemented JWT-based authentication filter for early request interception, token validation, and secure access control across endpoints.

Rappit

Software Intern (Feb 2022 - May 2022)

Built an enterprise-level full-stack web application with Spring Boot backend and Angular UI, implementing RESTful APIs with OData- style resource design, complete CRUD operations on MySQL, and responsive cross-browser compatible interfaces. CERTIFICATIONS

Professional Cloud Developer Certification (Google Cloud - 2025) EDUCATION

Sastra University, Kumbakonam,TamilNadu

B.Tech/B.E.

(2018 - 2022)

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