Senior Back-End Developer (Java+Groovy)

About the client:

The client is a technology-driven company that provides high-quality proxy solutions for businesses worldwide. They work deeply with networking, traffic management, and high-load systems, creating solutions used by thousands of clients across the globe.

About the role:

We are looking for a Senior Java/Groovy Engineer with strong, hands-on commercial experience in Groovy and a true ownership mindset. This role is for an experienced engineer who makes architectural decisions, anticipates problems, and drives solutions—not a mid-level profile. You will act as a technical leader, mentoring others and taking responsibility for technical direction without being a people manager. Strong communication skills and genuine interest in the product are essential.

Why choose this role:

• Freedom of action — no micromanagement, we trust your professionalism;
• Minimal bureaucracy — maximum value;
• Clear and effective communication — no unnecessary meetings;
• Real cases in high-load systems and working with a modern tech stack;
• Ability to use AI to automate daily tasks;
• Encouragement of initiative and autonomy;
• Competitive salary in USD (fixed + performance bonuses);
• Paid vacation, sick leave, and days off;
• Compensation for relevant courses and training, with the possibility to change tech stack on your initiative.

Day to day responsibilities :

• Maintain and optimize the code of high-load applications — to keep everything running like clockwork;
• Quickly fix bugs, improve existing features, and enhance system stability;
•  Refactor code mercilessly to legacy, keep frameworks up-to-date;
• Optimize performance: databases, queries, cache, logic - everything that affects speed;
• Develop new features and integrate modern frameworks;
• Write microservices using Spring Boot, grow your skills in Vert.x and other technologies;
• Collaborate closely with the team: frontend, QA, DevOps, and product managers.

You and your requirements:

• Experience in writing code and tests;
• At least 2 years of commercial experience with Groovy;
• Experience working with high-load systems;
• Ability to clearly express your ideas and implement them;
• Willingness to work with someone else's code and write clean, maintainable code;
• Team communication and constructive collaboration skills.

Nice to have:

• Experience in mentoring or leading a team;

Interested? Send your CV!