Roman H.

About Roman H.

I am a Senior Software Engineer with 5 years of experience in backend development, specializing in building scalable, high-performance systems. I thrive at every stage of the software development lifecycle—from designing robust architectures to coding, testing, and deploying solutions. Over my career, I have had the privilege of working with global clients in the telecom, procurement, retail, and digital transformation sectors, delivering impactful products across the US and Europe. I’m proficient in Java, Spring (Boot, MVC, Data, Security), Hibernate, and microservices, with experience in cloud platforms like AWS and SAP BTP. Highlights of My Expertise: • Delivered and launched multiple microservices-based solutions, improving system performance and scalability. • Expert in API development (REST/SOAP) and database management, with hands-on experience in PostgreSQL, Oracle, MongoDB, and Redis. • Skilled in modern DevOps tools like Docker, Kubernetes, Jenkins, and Helm to ensure smooth CI/CD pipelines and scalable deployments. • Strong collaboration with cross-functional, multinational teams across Europe, the US, and Asia to ensure timely, high-quality delivery. • proficient in debugging and optimizing code for reliability and performance, achieving up to 90%+ test coverage in key projects. What sets me apart is my ability to seamlessly collaborate across teams, tackle complex challenges, and continuously learn and adapt to new technologies.

Experience

1. Senior Software Engineer

   LeverX

   Feb 2024 — Present · Austin, TX, US

   As a Software Engineer on the backend team, I contributed to the transition from a monolithic application to a scalable microservices architecture for a cloud platform serving over 25 million users across Austria and Eastern Europe. This platform empowers individuals and businesses with reliable mobile, internet, and TV services, advanced cloud tools, and digital solutions. • Designed and implemented a microservice with Netflix integration and Kafka, handling API calls per second while ensuring high scalability and reliability.• Enhanced dependency management by automating cascading dependency version updates, reducing update time by 70% and saving over 100 hours per release cycle.• Split a large microservice into two optimized services, improving system response time by 28% and reducing database load by 15%, boosting overall performance and scalability.• Successfully mentored junior team members during their probation, providing technical guidance and support that led to their transition into full-time roles• Utilized MongoDB and Oracle for managing structured and semi-structured data, optimizing system performance for high scalability, and fast development cycles.• Worked with migration scripts, PL/SQL procedures, and Groovy scripts to drive system improvements and enhance processes.• Completed containerization using Docker, with Jenkins for CI/CD processes, and Kubernetes/OpenShift for orchestration.• Executed unit, integration, and API tests with 90% test coverage, alongside thorough manual testing, ensuring the platform’s reliability and robustness under various conditions.

Education

• Kharkiv National University of Radioelectronics

  Master's degree

  2006 — 2010