Middle Java Developer

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions. 

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.  

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, InPost, and many, many more. We work with leading technologies including AWS, Azure, GCP, Databricks, and Snowflake, and combine strong engineering culture with a consulting mindset and a continuous focus on growth and knowledge sharing. 

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.


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  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