Senior Java Engineer / Tech Lead (with German)

Expected, Java, Spring Boot, Docker, Kubernetes Optional, Kafka, RabbitMQ, PostgreSQL, Oracle, MongoDB, AWS, Microsoft Azure, Google Cloud Platform About the project, We are looking for an experienced Senior Java Engineer / Tech Lead to join Kyotu Technology and help build and evolve complex enterprise systems., , This is a hands-on technical leadership role for someone who enjoys solving complex engineering challenges, writing high-quality code, mentoring developers, and supporting teams in delivering scalable, reliable software solutions., , We're looking for someone who combines deep technical expertise with curiosity, ownership, and a pragmatic approach to problem-solving. Beyond backend development, you'll have the opportunity to explore and apply modern technologies, including AI, LLMs, and machine learning, where they can bring real business value. This is how we work, you have influence on the choice of tools and technologies, you have influence on the technological solutions applied, you have influence on the product, you focus on product development Your responsibilities, develop and maintain enterprise-grade backend applications using Java and Spring Boot, lead technical initiatives within the development team and support engineers in delivering high-quality solutions, collaborate with product owners, developers, and business stakeholders to understand business needs, participate in technical design discussions and contribute to solution design, write clean, maintainable, and scalable code following engineering best practices, review code, mentor team members, and promote high engineering standards, identify technical challenges and proactively propose improvements, support software delivery throughout the entire development lifecycle, contribute to continuous improvement of development processes, CI/CD, and engineering practices, explore and evaluate new technologies and engineering approaches minimum 8+ years of commercial experience in software development, very good knowledge of Java, Spring Boot, and enterprise application development, experience acting as a Tech Lead, Lead Developer, or senior technical mentor, experience developing distributed systems, microservices, and event-driven applications, experience with REST APIs, messaging solutions (e.g. Kafka, RabbitMQ), and system integrations, experience working with relational and NoSQL databases (e.g. PostgreSQL, Oracle, MongoDB), experience with Docker, Kubernetes, and cloud platforms (AWS, Azure, or GCP), experience with CI/CD pipelines and DevOps practices, strong understanding of software design principles, scalability, security, and performance optimization, ability to support technical decision-making and guide development teams, strong analytical and problem-solving skills with a proactive, ownership mindset, willingness to evaluate and adopt new technologies where they create business value, English and German at B2 level or higher Optional, experience with Machine Learning, LLMs, or AI-driven solutions, or a strong interest in developing expertise in this area What we offer, B2B contract, rate: 150-190 PLN + VAT / h, 100% remote work, long-term cooperation, projects with high technical complexity and real business impact, opportunity to work with experienced engineers and technology leaders, influence on technical decisions and engineering direction Benefits, sharing the costs of sports activities, private medical care, sharing the costs of foreign language classes, sharing the costs of professional training & courses, remote work opportunities, flexible working time, integration events, no dress code Recruitment stages, Meeting with HR Manager (30 minutes), Technical check (60 minutes), Decision KYOTU Technology sp. z o.o., Kyotu Technology is a boutique software house based in Wrocław and Warsaw, working fully remotely or in hybrid mode across Poland. We focus on long-term, high-quality engineering and building complex, production-grade systems with real business impact. Our teams have real influence on technical and architectural decisions. This is how we work,