Senior Scala Developer

You will be: designing, developing, and enhancing backend services using Scala, optimizing the performance, scalability, and reliability of large-scale applications, investigating, troubleshooting, and resolving complex technical issues affecting production systems, collaborating with cross-functional teams to identify bottlenecks and implement effective solutions, contributing to the continuous improvement of engineering practices and code quality, supporting knowledge sharing and mentoring less experienced engineers. Your profile: 5 years of commercial experience in Scala backend development, strong experience building and maintaining scalable backend applications, solid background in system performance tuning and optimization, practical experience using AI-powered assistants (e.G. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, ability to analyze, troubleshoot, and resolve complex technical issues, strong understanding of backend engineering best practices and software design principles, proactive approach to problem-solving and continuous improvement, strong collaboration and communication skills, good command of English (min. B2). 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. Work from the European Union region and a work permit are required Recruitment Process: CV review – HR Interview – 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.