We are looking for an experienced Java Tech Lead to join an agile product team (Squad) within a global organization in the car rental and leasing sector. You will play a key technical leadership role, ensuring solution quality, driving modern engineering practices, and supporting the team in delivering high-value digital products. Expected technology background is Java Backend + Angular or Java Backend + RabbitMQ & Kafka or Java Backend + Cloud (Azure).  Project information: Industry: IT services, car rental, and leasing Work model: Hybrid, Warszawa Budget: b2b 150 - 180 net per hour Project length: November 2025 -December 2026, with an option for extension Project language: Polish & English Start date: ASAP Methodologies: Agile Scrum, Agile Kanban, DevOps, Test & Learn, Design Thinking, Agile@scale Collaboration tools: Jira, Confluence, Teams, SharePoint, iObeya, Yellow, Digital Working Only candidates with citizenship in the European Union and residence in Poland  Project scope: Ensure software quality & technical excellence Act as a senior technical member of the Squad, ensuring high-quality delivery Lead the technical design of products, ensuring alignment with architecture, operational needs, and IT standards Provide optimal IT solutions addressing business needs while maximizing product value Approve final solutions and raise alerts on risks or non-conformities Identify necessary DevOps tools, frameworks, and technologies Lead development & architecture Design and develop components using Java-based microservices architecture Facilitate workshops, define assumptions, and create operational/technical macro-designs Guide the Squad in architectural choices in coordination with enterprise architects Ensure solutions meet security, continuity, performance, and integration requirements Analyse technical risks and propose mitigation strategies Coach and support the team Mentor developers to grow their technical expertise Share knowledge to strengthen team efficiency and engineering culture Drive Agile transformation Support continuous improvement of Agile methods across the delivery cycle Actively participate in Agile rituals, including Agile@scale ceremonies Engage in Tech Lead communities on the entity and group level Requirements: Strong background in Java development, application testing, architecture, and security Expertise in at least one stack: full-stack development with Angular or Java Backend + RabbitMQ & Kafka or Java Backend + Azure Cloud Experience designing microservices and complex distributed systems Familiarity with cybersecurity and risk analysis Understanding of digital platforms, APIs, and data flows Experience with Agile and DevOps practices Good command of English Strong teamwork and communication abilities Results-driven mindset with problem-solving attitude Ability to lead, inspire, and develop others Strong analytical skills and ability to handle transformation projects We offer: B2B contract: 150-180 PLN/h net Hybrid work model in Warsaw (50% of work time onsite) Opportunity to shape technical direction and architecture in a modern digital product environment Work in an international, agile ecosystem with strong engineering communities Challenging engagement with high autonomy and technical leadership impact Private medical care and MultiSport card