Senior Java Developer (fintech project)

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,
• practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery,
• strong debugging and problem-solving skills,
• solid understanding of software design patterns and backend architectures,
• 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.