Senior Java Software Engineer

Senior Backend Engineer (Java | Legacy Migration)

Company: Grid Dynamics

Location: Ukraine

English: B2+

🚀 About the Project

You’ll join a leading European digital platform operating at large scale, serving millions of users and handling high-volume data flows across multiple markets.

The current focus is a strategic modernization initiative - migrating critical legacy services into a modern, scalable Java-based architecture in the cloud. This is a high-ownership role where your work will directly shape the future of the platform.

💡 Why this role is interesting

• Be part of a large-scale legacy-to-modern migration
• Real impact: help sunset outdated systems and build the future architecture
• Work with cloud technologies (AWS) and modern backend practices
• High level of autonomy and ownership
• Opportunity to solve complex engineering challenges in partially documented environments

🛠 Tech Focus

• Java (core technology)
• Legacy: VB.NET (reading, supporting, migrating)
• AWS (nice to have)
• Service migration & system redesign

✅ What we’re looking for

• Strong commercial experience with Java backend development
• Hands-on experience with legacy system migration
• Ability to read and understand VB.NET code
• Experience working with poorly documented or complex systems
• Independent, pragmatic, and delivery-oriented mindset
• Solid problem-solving and debugging skills

🔧 Your responsibilities

• Analyze and understand existing VB.NET services
• Rebuild and migrate them into modern Java-based solutions
• Gradually eliminate legacy dependencies
• Support migration of key components (APIs, data import tools, communication services)
• Provide bug fixing and support for legacy services during transition
• Ensure stable delivery without critical regressions
• Contribute to the target architecture and best practices