Senior Frontend Developer

About us

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 more than 100 colleagues from various nations, we combine a wide range of expertise and perspectives to achieve big things together.

• Strong Frontend
  
  Experience:
  
  You have comprehensive experience in frontend development with modern JavaScript frameworks and have successfully built complex SaaS web applications whether with Vue.js, React, or Angular.
• Technical Foundation: You're comfortable with Type Script, 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 user's 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: You'll 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 Job Rad – 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.

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.

• Independent Feature Development: Develop features from requirements analysis through implementation to deployment – in a cross‑functional team that supports you and values your ideas.
• User‑Centered Design: Create intuitive interfaces…