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Hi, I'm Marko Buljan, a Senior Java Consultant and Backend Engineer with over 10 years of experience designing scalable, high-performance systems. I specialize in Java, Spring, Hibernate, and Kubernetes, with a strong background in security, DevOps, and cloud-native architectures. I enjoy optimizing system performance, eliminating security vulnerabilities, and streamlining CI/CD workflows. I have worked extensively as a contractor and consultant across various industries including logistics, robotics, telecom, eCommerce, and satellite systems. Founding my own software engineering company allows me to deliver custom solutions while continuously expanding my technical expertise and collaborating on innovative projects.…Hi, I'm Marko Buljan, a Senior Java Consultant and Backend Engineer with over 10 years of experience designing scalable, high-performance systems. I specialize in Java, Spring, Hibernate, and Kubernetes, with a strong background in security, DevOps, and cloud-native architectures. I enjoy optimizing system performance, eliminating security vulnerabilities, and streamlining CI/CD workflows. I have worked extensively as a contractor and consultant across various industries including logistics, robotics, telecom, eCommerce, and satellite systems. Founding my own software engineering company allows me to deliver custom solutions while continuously expanding my technical expertise and collaborating on innovative projects.

Marko Buljan

Developer, Back-End Developer, Cloud Developer, +2

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Hi, I'm Marko Buljan, a Senior Java Consultant and Backend Engineer with over 10 years of experience designing scalable, high-performance systems. I specialize in Java, Spring, Hibernate, and Kubernetes, with a strong background in security, DevOps, and cloud-native architectures. I enjoy optimizing system performance, eliminating security vulnerabilities, and streamlining CI/CD workflows. I have worked extensively as a contractor and consultant across various industries including logistics, robotics, telecom, eCommerce, and satellite systems. Founding my own software engineering company allows me to deliver custom solutions while continuously expanding my technical expertise and collaborating on innovative projects.…Hi, I'm Marko Buljan, a Senior Java Consultant and Backend Engineer with over 10 years of experience designing scalable, high-performance systems. I specialize in Java, Spring, Hibernate, and Kubernetes, with a strong background in security, DevOps, and cloud-native architectures. I enjoy optimizing system performance, eliminating security vulnerabilities, and streamlining CI/CD workflows. I have worked extensively as a contractor and consultant across various industries including logistics, robotics, telecom, eCommerce, and satellite systems. Founding my own software engineering company allows me to deliver custom solutions while continuously expanding my technical expertise and collaborating on innovative projects.

Available to hire

Hi, I’m Marko Buljan, a Senior Java Consultant and Backend Engineer with over 10 years of experience designing scalable, high-performance systems. I specialize in Java, Spring, Hibernate, and Kubernetes, with a strong background in security, DevOps, and cloud-native architectures. I enjoy optimizing system performance, eliminating security vulnerabilities, and streamlining CI/CD workflows.

I have worked extensively as a contractor and consultant across various industries including logistics, robotics, telecom, eCommerce, and satellite systems. Founding my own software engineering company allows me to deliver custom solutions while continuously expanding my technical expertise and collaborating on innovative projects.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Croatian

Fluent

Work Experience

Founder, Software Engineer at New Game State GmbH

January 1, 2024 - Present

Founded my own software engineering company to provide consulting and development services. Led the migration of a robot fleet management system to Kubernetes, enhancing scalability and leveraging Java backend services for core functionality. Developed an MQTT-based RPC library for real-time robot communication, and strengthened system security by resolving vulnerabilities. Managed CI/CD pipelines using GitLab and developed performance analytics dashboards. Drove project planning and roadmap definition focusing on Java-based solutions.

Software Engineer at Beyond Now GmbH

September 30, 2023 - July 24, 2025

Worked on a large-scale digital business platform for telecom providers. Debugged and analyzed Java-based backend system issues and frontend problems. Optimized Java application performance using technologies including Spring, Hibernate, Kubernetes, and Docker.

Freelance Software Engineer at MusiX GmbH

October 31, 2022 - July 24, 2025

Provided software development and consulting services for a major Swiss eCommerce platform. Developed and maintained a competitor product analysis system, integrated supplier systems for automated stock updates, and improved UI/UX with Java backend services. Provided bug fixes, technical support, and mentored new team members in Java development best practices.

Software Developer at CGI Deutschland BV & Co. KG

August 31, 2019 - July 24, 2025

Developed and maintained mission control software for European space agencies. Designed and implemented security features for mission control systems. Enhanced security posture by upgrading Java security libraries. Investigated and resolved complex anomalies and managed client audits for satellite mission control systems. Provided on-site support and contributed to Java development efforts.

Software Developer at BitArt d.o.o.

November 30, 2016 - July 24, 2025

Developed and maintained logistics software for the largest delivery service providers in Croatia. Solely developed a mobile app for delivery personnel with Java backend APIs and maintained web services. Developed a B2B web service to facilitate communication between delivery services and clients. Troubleshot production issues and deployed Java-based web services and databases.