👉Middle Java Developer

🟣You will be: • developing and maintaining backend systems for advertising and e-commerce platforms, • building low-latency, high-performance services processing large volumes of data, • developing scalable microservices and APIs using Kotlin and Spring Boot, • working on real-time event processing and advertising targeting mechanisms, • contributing to architecture design and system scalability improvements, • collaborating with stakeholders and supporting engineering best practices, including code reviews and code quality standards, • participating in technical readiness/on-call support for production incidents a few days per month.   🟣 Your profile: • 3+ years of professional experience in backend development, • very good knowledge of Kotlin and Spring Boot, • openness to occasional visits to the Warsaw office (1–2 days per quarter), • hands-on experience with microservices architecture, • practical experience working with NoSQL databases, especially MongoDB, • experience building and maintaining backend systems and APIs, • understanding of system design and scalable architecture principles, • experience working with high-performance and high-scale systems, • strong analytical thinking and problem-solving skills, • ability to collaborate effectively with stakeholders and engineering teams, • good communication skills in English (B2) and Polish (C1), • practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery. Work from the European Union region and a work permit are required. 🟣 Nice to have: • experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, • interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR call – Technical Interview – Client Interview – Decision    🎁 Benefits 🎁 ✍ Development: • development budgets of up to 6,800 PLN, • we fund certifications e.g.: AWS, Azure, • access to Udemy, O'Reilly (formerly Safari Books Online) and more, • events and technology conferences, • technology Guilds, • internal training, • Xebia Upskill. 🩺 We take care of your health: • private medical healthcare, • multiSport card - we subsidise a MultiSport card, • mental Health Support. 🤸‍♂️ We are flexible: • B2B or employment contract, • contract for an indefinite period.