Senior Fullstack Developer (w/m/d) at aedifion GmbH

At aedifion, you will actively shape the future of energy-efficient building operations. Our mission is to make existing buildings smarter, more sustainable, and easier to manage – making a real contribution to CO₂ reduction.
You’ll join an innovative tech company that uses cutting-edge technologies like IoT, AI, and cloud solutions to enable sustainable real estate. Our culture? Open, diverse, and team-oriented. With nearly 90 colleagues from 12 different nations, we combine a wide range of expertise and perspectives to achieve big things together.

• Experience: At least 5 years of professional experience in backend development, ideally with fullstack expertise and a background in agile development environments.
• Fullstack Development: Development and maintenance of backend services and frontend components to ensure a seamless and scalable user experience.
• Architecture: Active contribution to the design of a sustainable software and system architecture that ensures long-term scalability, stability, and efficiency.
• Tech Stack: Solid experience with Python and Go, familiarity with SQL, REST APIs, and Kubernetes; optionally, knowledge of frontend technologies such as VueJS and TypeScript.
• Work Style: A structured approach to complex challenges, high quality standards, and a strong sense of ownership for services and projects.
• Soft Skills: Strong problem-solving skills, ability to prioritize effectively, enthusiasm for working in cross-functional teams, mentoring capabilities, and clear technical communication.
• Work Eligibility: You must be a resident of Germany with a valid work permit.

As a Senior Fullstack Developer (f/m/d), you are the driving force behind the development of our scalable and maintainable software solutions. You work at the intersection of backend and frontend, ensuring that our platform runs seamlessly — from processing large volumes of data to delivering an intuitive user experience.
You take end-to-end responsibility for products and services and contribute your expertise to the design of sustainable architectures. You improve the scalability and performance of existing systems and build new services with high code quality. Through your work, you promote agile methodologies and support mid-level and junior developers in their growth. Your contribution is key to making our vision of autonomous, energy-efficient buildings a reality.

• Fullstack Development: Design, development, and maintenance of backend services (Python, Go) and frontend components (VueJS and TypeScript) to ensure a seamless user experience.
• Architecture: Co-design of a scalable and robust software and system architecture with a focus on long-term sustainability.
• Code Quality: Ensuring high-quality software through automated testing, code reviews, and the application of best practices.
• Teamwork: Close collaboration with cross-functional teams to clarify technical requirements and develop efficient solutions.
• Mentoring: Supporting and mentoring junior and mid-level developers through coaching and technical feedback.
• Innovation: Continuous improvement of our platform by using modern technologies and promoting agile ways of working.

• Make an Impact: Your work helps reduce CO₂ emissions and makes buildings more sustainable and energy-efficient.
• Mobile Work: Work the way that suits you – with flexible hours, a short core working time, and the freedom to work from our modern office in Cologne, remotely across Germany, or up to 10 days per year from within the EU.
• Long-Term Opportunity: After your probation period, we offer a permanent employment contract.
• Feel-Good Perks: 30 vacation days, fresh organic fruit, regional coffee, free drinks, and a monthly team breakfast to keep you energized.
• Learning & Growth: Tailored training and development opportunities to support your career path.
• Tech Stack: Choose between Microsoft or Apple equipment, plus high-quality noise-cancelling headphones for focused work.
• Mobility Package: Stay flexible – choose between a Deutschlandticket or a JobRad for commuting or private use.
• Future Planning: We support your financial future with contributions to capital-forming benefits or company pension schemes.
• #teamaedifion: Regular team events, flat hierarchies, active knowledge sharing, and a collaborative atmosphere define our team culture.
• Dog-Friendly Office: Your dog is welcome – we’re happy to have furry team members!

At aedifion, we welcome applications from people of all gender identities, nationalities, ethnic backgrounds, social origins, religious beliefs, physical and mental abilities, age groups, and sexual orientations.