Rohan Kumar
Contact details — on requestProof of Work — on request
Experience
Assistant System Engineer
Tata Consultancy Services · Apr 2025 – Present
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Assistant System Engineer – Full Stack Software Engineer (Java, Go, Python)
Tata Consultancy Services (TCS) · Apr 2024 – Present
- Owned end-to-end design and implementation of Java and Go microservices for large-scale distributed systems on Linux platforms, leveraging goroutines and channels for concurrent data processing - improving throughput by 18% and reducing backend latency under peak load.
- Built RESTful APIs (Swagger/OpenAPI) in Java, Spring Boot, and Go, enabling integration across distributed microservices and payment gateways; clearly communicated scope, timelines and delivery commitments to Engineers, Architects and Product Managers — cutting transaction failure rates by 15%.
- Designed data access layers with JPA/Hibernate and Spring JDBC on Oracle/MySQL; authored 100+ PL/SQL procedures ensuring data integrity in high-volume SaaS and on-prem BFSI workloads.
- Performed in-depth root cause analysis and troubleshooting of functional and performance issues across distributed services; resolved 30+ production incidents using Python Debugger, structured logging, and metrics continuously assessing risks and making decisions based on data.
- Wrote unit and integration tests (JUnit, Go test, Mockito) following TDD practices; contributed to CI/CD pipelines (Jenkins, GitHub/GitLab); collaborated with QA, support, and field teams to diagnose complex issues and deliver high-quality patches, reducing manual testing effort by 40%.
- Leveraged AI tools (GenAI Copilot) to enhance productivity and streamline code generation and review workflows; worked in Agile/Scrum sprints tracked via JIRA and GitHub, achieving 98% on-time delivery.
Assistant System Engineer Trainee
Tata Consultancy Services · Apr 2024 – Apr 2025
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Software Developer
PearlThoughts · Oct 2023 – Nov 2023
- I was responsible for building an API for their product Doctor's appointment system.
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Software Developer Intern
Pearl Thoughts · Oct 2023 – Nov 2023
- Built NestJS REST APIs for a SaaS doctor booking platform backed by MongoDB, handling ACID-compliant concurrent scheduling at scale; wrote Python scripts to automate test data generation and service validation.
- Containerized services using Docker, standardizing deployment environments across Linux and cloud platforms, reducing developer onboarding time by 40%.
Web Developer
Suvidha Foundation (Suvidha Mahila Mandal) · Jun 2022 – Jul 2022
- Worked as a Frontend developer.
- Responsible for developing ,maintaining and improving website .
Skills 0 proven through work
Also works with
End-to-End System UnderstandingSelf-Directed LearningE-commerce Application DevelopmentDatabase ManagementApplication DeploymentMonolithic ArchitectureTechnical UnderstandingSystem EnhancementProcess ImprovementBusiness AcumenMongoDBDockerBackend DevelopmentMVC Architecture ImplementationNestJS DevelopmentBug FixingUnit TestingTask AutomationTest DocumentationAI Tool EnablementAI-Assisted DevelopmentDatabase Sharding ImplementationLow-Latency System OptimizationConcurrent Workflow ImplementationGo Channels UsageGoroutine UsageAngular DevelopmentReact DevelopmentPostgreSQL Database UsageSpring BootMicroservices ArchitectureGo ProgrammingJava Development
Proof of Work
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Education
B.Tech, Information Technology
Cochin University of Science and Technology · 2019 — 2023
Contact details
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