Sonu Kumar

Java Backend Developer with 8+ years of software engineering experience, specializing in Spring Boot microservices, REST APIs, and event-driven systems with Apache Kafka. Skilled in building scalable, secure backend architectures for EV-charging and e-learning platforms, with hands-on expertise across JPA/Hibernate, MySQL, Docker, and CI/CD pipelines.

Java Backend Developer - Infoskills Technology - Noida

(2022-05)

• Designed and built Spring Boot REST microservices, JPA repositories, and Kafka event-driven pipelines for TelioEV (EV-charging platform) and Learning Space Pro (e-learning platform).
• Implemented OCPP WebSocket integration for real-time charger communication and a Google Maps-based station locator service.
• Enforced Spring Security-based authentication and authorization (JWT, Keycloak) across services; containerized deployments with Docker and streamlined releases through CI/CD.
• Optimized MySQL schema design and query performance for high-traffic charging-session tracking.

Software Developer - Fluper Ltd - Noida

(2020-02 - 2022-04)

• Delivered REST API integrations and MVVM-based application architecture across 10+ client applications.
• Integrated Firebase, Retrofit-based networking, and third-party services to support scalable client-server communication.

Software Developer - Hire Indians Infotech Pvt Ltd - Noida

(2019-08 - 2020-01)

• Integrated payment gateways, real-time chat, and Google Maps APIs across multiple client backends.

Software Developer - Metro Infrasys Pvt Ltd - Gurgaon

(2016-05 - 2019-07)

• Built backend integrations for voice-command and diagnostics systems using Google/Microsoft Cognitive Services and IBM Watson APIs.
• Developed Node.js-based Alexa skills and real-time incident-reporting services for highway safety platforms.

Software Developer - Zebrogs Technologies - Noida

(2015-05 - 2016-05)

• Developed and supported e-commerce and utility application backends, including a custom multi-language data service.

PG Diploma - Data Science - IIIT Bangalore (via upGrad) (2023 - 2024)

MCA - Noida Institute of Engineering & Technology (2013 - 2015)

BCA - IP College (2010 - 2013)