YOUR RESPONSIBILITIES Take technical ownership of projects and make key architectural and technology decisions Lead, mentor and support developers, helping the team solve complex technical challenges and grow their skills Design, develop and maintain scalable web applications, with a strong focus on Python and modern backend development Contribute hands-on to the codebase, conduct code reviews and ensure high standards of code quality, testing and maintainability Design scalable system architectures and REST APIs, applying Clean Architecture and SOLID principles Work across the stack when needed, collaborating on frontend solutions built with React / React Native and TypeScript Use AI-assisted development tools such as Claude in day-to-day engineering work, including coding, analysis, testing, debugging and solution design Work closely with PMs, POs, UI/UX Designers and Developers to translate business needs into effective technical solutions Gather, define and document functional and non-functional requirements , assess their technical feasibility and communicate them clearly to the development team Support Project Managers with technical planning, problem-solving, task estimation and prioritisation Collaborate on cloud-based solutions and modern DevOps practices throughout the development and deployment lifecycle Communicate directly with clients and stakeholders, providing technical recommendations and explaining architectural decisions Work in an Agile/Scrum environment and actively participate in planning, demos, retrospectives and other team activities Be comfortable working across different projects and adapting to changing technical and business requirements Occasionally travel for client meetings, workshops, external team collaboration or project planning WHAT WE EXPECT FROM YOU 5+ years of professional software development experience , including hands-on experience in a Tech Lead, Technical Lead, Team Lead or similar technical leadership role Advanced knowledge of Python and its engineering best practices; experience with Django is a plus Strong understanding of software and system architecture , including designing modular, scalable and maintainable systems and REST APIs Proven ability to take technical ownership of a project, proactively propose solutions and make architectural decisions Strong hands-on engineering background - this is a leadership role, but you will still actively contribute to the codebase Experience delivering end-to-end solutions that meet both technical requirements and clients’ business objectives Practical experience with AI-assisted software development and tools such as Claude or similar - AI is part of our everyday engineering workflow Good understanding of modern frontend technologies, particularly React and TypeScript . Experience working with cloud environments and modern DevOps practices Good understanding of Clean Architecture, SOLID principles, testing practices and code quality standards Ability to define and document functional and non-functional requirements Experience with Git-based development workflows and code review Strong communication skills and the ability to work effectively with both technical and non-technical stakeholders Openness to learning, experimenting with new technologies and continuously improving engineering practices Polish and English at C1 level or higher NICE TO HAVE Experience with Django Experience with React Native and mobile application development Hands-on experience building solutions using LLMs, AI APIs or other Generative AI technologies Experience introducing AI tools or AI-assisted workflows into software development teams Experience with Redux / Redux Toolkit / RTK Query Experience with HTML5, CSS3 / Sass and modern frontend development Experience in data analysis or data processing WHAT WE OFFER Opportunity to work on challenging and technically ambitious projects A role with real influence over technical and architectural decisions Hands-on work with AI and modern software development tools 26 paid days off 20 fully paid sick leave days Flexible working hours and working model Modern tools, equipment and software needed for your work Private medical care Multisport card Regular team-building events, integrations, Christmas parties and workations A collaborative environment where knowledge sharing is encouraged through internal meetings and Tech Talks RECRUITMENT PROCESS Apply with your CV Send us your application and tell us a little about your experience. Intro call with our People Team A short conversation to get to know each other and cover the basics. First interview (approx. 60 minutes) We’ll talk about your experience, previous projects, leadership background, expectations and what you’re looking for in your next role. Technical interview with our CTO (approx. 120 minutes) Meet Maciej Sułek, our CTO , and dive deeper into your technical experience, architecture, Python, problem-solving, technical leadership and approach to modern software development.