Senior Software Developer - Python (m/f/d)

You take a key role in the Process & IT team and develop automations that bring us to the next level as well-funded scale-up. Software Developer:in (m/w/d) - Python Not only do you work hands-on, but as a pioneer, you drive the future of software development at one hundred. You see and want to take advantage of the opportunities of AI-based development, you establish AI agencies, empower the team and make the future a reality today! Promote Excellence: Set Quality, Safety and Coding Standards, Live Clean Code and Make Our Performance Visible Be mentor and expert: Take over the professional mentoring for the developers:inside, carry out regular code reviews and be Sparringspartner at technical challenges Code and give orientation: Create opinionated examples and reference implementations and discuss solutions for complex tasks with the developers: Spread(re) knowledge: introduce new formats such as Code/AI-Katas or others, organize training and ensure that know-how is available for all and is actively used Translated Business in Tech: Support our Process Managers in the planning and dismantling of complex technical problems in implementable technical requirements and tasks Design the future: Develop architecture with your team lead and make AI a valuable part of our development process

Python Expert:in to KISS: You master typified python on expert:in-level, KISS and YAGNI are your guide planks and you are convinced that everything-as-code is the best documentation Responsibility: You are willing to take responsibility throughout the SDLC, have already gained experience as a mentor at best, and trust you to lead a team of 5-8 developers: Quality Conscious: You use Secure-Coding Practices, of course, think Compliance and have an eye for Edge Cases. Test automation and Branch coverage are standard for you No Enterprise Corset: The Scale-up Dynamics, you want to advance structures - without Enterprise-Overhead -, increase the Outcome and further develop the team. Ideally, you have even gained experience in a start-up Interested in AI: You want to include AI and agents in the SSDLC. Previous experience is nice-to-have, the drive to go deeper is mandatory. Experiences with Prompting, the MCP and tools like GitHub Copilot, OpenAI Codex or Claude Code are a plus Business-oriented: You understand the business context of a hundred, seek simple and pragmatic solutions for complex problems and communicate very well in German and English Fun on our tech stack: You work with Python 3.13, uv, pyright and mypy; use pytest and Property-Based Testing via Hypothesis; deploy over GitHub with action and terrain after Windmill on AWS; and process data with PostgreSQL and DuckDB We look forward to your application! Regardless of age, gender, origin, disability or sexual identity, all qualified applications are welcome to us.

100% Sustainability: Make your valuable contribution to climate protection by moving photovoltaic systems to multi-party houses together with us 100% Community: Become a central part of a dynamic energy startup with top-trained and dedicated team. Joint events belong to our values as well as shared decisions and mutual appreciation 100% flexibility: Work where and when it is best for you, because work and private life are really compatible with us. You expect Flexible Working Hours 30 days holiday p.a. + free on your birthday Hybrid and mobile work Workation in the EU Possibility of Sabbatical

100% Benefits: Benefit from our mobility and health budget and receive a job bike and/or a Germany ticket. Take advantage of a company pension, a grant to the Urban Sports Club membership and our online mental health platform that is available to you at any time. Free drinks in our Ehrenfelder and Berlin offices are of course also included