Senior Java Developer (legacy project)
Senior Java developer at Xebia to work on a legacy project: diving into large, mature codebases, understanding complex existing systems, and actively improving them rather than just maintaining. Core stack is Java, with practical use of AI coding assistants (Claude Code, Copilot, Cursor). Remote within the EU; B2 English required.
- Compensation
- Not disclosed
- Location
- Rzeszów, Poland
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 25+ years
- Category
- Software engineering
- Posted
Skills
Must have
- Senior-level experience in Java development
- Proven experience working with large or legacy codebases
- Ability to quickly understand complex existing systems and navigate established architectural patterns
- Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor)
- Strong analytical and problem-solving skills with a pragmatic approach to improving existing solutions
- Confidence in introducing changes to mature applications and taking ownership of technical challenges
- Willingness to work with legacy technology and improve it rather than simply maintain it
- Good communication and collaboration skills; effective teamwork
- Good command of English (min. B2)
- Work from the European Union region and a work permit required
Nice to have
- Experience applying GenAI in a structured way within the SDLC (defined workflows, prompt patterns, tool integrations)
- Familiarity with emerging AI-driven practices (agent-based workflows, AI-augmented development) and willingness to experiment
Full description
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 Millennium, ING, Play, Edenred, Arabian Drilling, FedEx, Leroy Merlin, Truecaller, Volotea, Schmitz Cargobull, 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.
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Your profile:
- senior-level experience in Java development,
- proven experience working with large or legacy codebases,
- ability to quickly understand complex existing systems and navigate established architectural patterns,
- practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery,
- strong analytical and problem-solving skills, with a pragmatic approach to improving existing solutions,
- confidence in introducing changes to mature applications and taking ownership of technical challenges,
- willingness to work with legacy technology and improve it rather than simply maintain the existing state,
- good communication and collaboration skills and the ability to work effectively in a team,
- good command of English (min. B2).
- 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.