I am a Full Stack Engineer with 4+ years of experience designing and delivering scalable backend and full-stack applications, with strong expertise in Java, Spring Boot, React/React Native, and RESTful APIs. I enjoy turning complex problems into robust, maintainable software and collaborating with cross-functional teams to ship value. I’ve contributed to EV charging platforms and payment integrations, built dashboards, and implemented features across the stack, with a focus on performance, reliability, and clean architecture. I’m always eager to learn and apply new technologies to improve system reliability and scalability.

Onisim Rotaru

I am a Full Stack Engineer with 4+ years of experience designing and delivering scalable backend and full-stack applications, with strong expertise in Java, Spring Boot, React/React Native, and RESTful APIs. I enjoy turning complex problems into robust, maintainable software and collaborating with cross-functional teams to ship value. I’ve contributed to EV charging platforms and payment integrations, built dashboards, and implemented features across the stack, with a focus on performance, reliability, and clean architecture. I’m always eager to learn and apply new technologies to improve system reliability and scalability.

Available to hire

I am a Full Stack Engineer with 4+ years of experience designing and delivering scalable backend and full-stack applications, with strong expertise in Java, Spring Boot, React/React Native, and RESTful APIs. I enjoy turning complex problems into robust, maintainable software and collaborating with cross-functional teams to ship value.

I’ve contributed to EV charging platforms and payment integrations, built dashboards, and implemented features across the stack, with a focus on performance, reliability, and clean architecture. I’m always eager to learn and apply new technologies to improve system reliability and scalability.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate

Language

Romanian, Moldavian, Moldovan
Fluent
English
Advanced

Work Experience

Software Engineer at General Security
May 1, 2021 - Present
Designed and maintained scalable backend services using Java and Spring Boot for EV charging infrastructure. Built full-stack applications using React, React Native, and Node.js integrated with Java-based REST APIs. Implemented OCPP protocol features enabling communication between EV charging stations and backend systems. Developed and maintained multiple production systems including: EV station monitoring dashboards OCPP translation and diagnostic tools Payment device integration services In-station display applications EV station management portals Collaborated with cross-functional teams to improve system reliability, performance, and scalability.
Software Developer Intern at Smedix Inc
November 1, 2020 - February 1, 2021
Designed and implemented two fully functional applications: ERP system and a medical desktop application; contributed to project architecture and hands-on development.

Education

Bachelor's degree in Automation and Computer Science at Technical University, Cluj-Napoca
January 1, 2018 - January 1, 2022

Qualifications

Driving License - Category B
January 11, 2030 - February 25, 2026

Industry Experience

Software & Internet, Professional Services