Senior Frontend Developer (wmd)

As Senior Frontend Developer (f/m/d) it is your mission to ensure that the aedifion platform enables self-use through user-friendly scalable frontend solutions and empowers customers to use complex features independently. You connect technical excellence with user-centered design and contribute significantly to making our SaaS platform improve building energy efficiency worldwide while sustainably increasing customer satisfaction.

• Strong Frontend Experience: You have comprehensive experience in frontend development with modern JavaScript frameworks and have successfully built complex SaaS web applications with
• Technical Foundation: Youre comfortable with TypeScript have experience with modern CSS frameworks (e.g. Tailwind CSS) and can transform designs into responsive high-performance UI components.
• Quality Mindset: Testing is second nature to you you have experience with testing frameworks (e.g. Jest Vitest Cypress) and value maintainable well-documented code.
• User Focus: You think from the users perspective understand UX principles and have an eye for detail performance accessibility and usability matter to you.
• Team Player with Initiative: You enjoy working in cross-functional teams communicate proactively share your knowledge and independently take ownership of tasks from start to finish.
• Learning Mindset: You stay technologically curious enjoy trying new things and continuously develop your skills through personal projects team exchange or training opportunities.
• Language Skills: You communicate confidently in English (C1) German skills are a plus but not required.

• Make an Impact: Your work helps reduce CO₂ emissions and make buildings more sustainable and energy-efficient with real measurable impact.
• Flexible Work-Life Balance: Shape your workday to fit your lifestyle with flexible working hours a short core working time and the freedom to work from our modern office in Cologne remotely from anywhere in Germany or up to 10 days per year from other European countries.
• Long-Term Perspective: After your probation period we offer you a permanent employment contract we invest in long-term collaboration and your development.
• Time to Recharge: Enjoy 30 days of annual vacation to truly relax plus fresh organic fruit regional coffee free drinks and a monthly team breakfast to power your day.
• Individual Development: We support your growth with tailored training opportunities conference visits workshops and time for personal development your growth matters to us.
• Modern Equipment: Youll receive high-quality equipment of your choice Microsoft or Apple and noise-cancelling headphones for focused work whenever you need them.
• Sustainable Mobility: Stay mobile with the Deutschland-Ticket or a JobRad for commuting or personal use whatever fits your life.
• Financial Security: We contribute to capital-forming benefits (VWL) or your company pension plan (bAV) for your long-term security.
• Genuine Team Culture: Regular team events collaboration at eye level active knowledge sharing and flat hierarchies foster strong connections here your opinion is heard and valued.
• Dog-Friendly Office: Bring your dog along we welcome four-legged team members and a relaxed atmosphere.

Our goal is simple: we make buildings part of the solution for a planet worth living on. To achieve this we are looking for people who are passionate about innovation and technology who are up for any challenge and who share the same goal. Whether you are an experienced developer a natural sales talent or a newly qualified engineer you will be an important part of our mission from day one. Join #teamaedifion and help make the energy transition in buildings possible.