👉Senior Java Developer

🟣You will be:

• designing, developing, and maintaining high-performance backend systems using Java and Spring Boot,  

• working on transaction, payment, and cashier-related functionalities within a complex trading platform,  

• building and maintaining RESTful and RPC APIs (e.g. using Apache Dubbo),  

• developing solutions capable of handling high-volume traffic, high concurrency, and multi-threaded environments,  

• processing and optimizing large volumes of data within distributed systems,  

• collaborating with cross-functional teams to deliver scalable and reliable systems,  

• integrating backend services with third-party applications and external systems,  

• troubleshooting, debugging, and optimizing system performance in production environments.  

🟣 Your profile:

• 5+ years of professional experience in Java backend development,  

• strong experience with Java (8+) and Spring Boot,  

• experience in business product development within fintech environments, 

• experience working on B2B products, 

• hands-on experience with high-concurrency systems, multi-threading, and high-volume traffic environments,  

• proven experience working with large-scale data processing systems,  

• solid knowledge of technologies such as MyBatis, Redis, and message queue systems,  

• experience working with relational databases such as MySQL, including writing complex queries and performance tuning,  

• experience working with Elasticsearch and big data technologies such as Hadoop,  

• experience with messaging systems (queues) and event-driven architectures,  

• experience with unit and integration testing,  

• experience integrating with third-party services and APIs,  

• strong debugging and problem-solving skills,  

• solid understanding of software design patterns and backend architectures,

• practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery,

• good communication skills and ability to work in a team environment,

• immediate availability or a short notice period is preferred.

Work from the European Union region and a work permit are required.

🟣 Nice to have:

• familiarity with RPC frameworks such as Apache Dubbo,  

• experience working with systems serving large-scale user bases,  

• understanding of distributed systems and microservices architecture,

• 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.