Senior Backend Engineer. Köln LilyLifestyle

At Circonomit, we follow the mission to build the strategic twin of organizations. By transforming operational data into clear impact models, we revolutionize how resources are managed and decisions are made.

As a Software Engineer, you will work side-by-side with our CTO to architect and ship intuitive, high-performance applications. As one of our first engineers, you will take full-stack responsibility and play a pivotal role in actively shaping our product and technical direction. Join our nerdy, fast-paced team to build the computational core that makes our mission possible. We are looking for an engineer with a bias for action who can balance speed with the mid-term tech strategy and is able to take on complex challenges with independence and curiosity.

• Build the backbone of Circonomit's technology and develop end-to-end features that deliver immediate value for our customers to map their reality into a semantic and computable model
• Build and refine high-quality, performant user interfaces with Type Script and Solid.js
• Design and implement scalable backend systems with a focus on performance and maintainability
• Write and review clean, effective code, following best practices and design patterns
• Prototype fast and smart, testing and learning between AI capabilities and UX requirements

• 5+ years of software engineering experience, preferably in a startup or fast-paced environment
• Git Hub or a portfolio showcasing your capabilities and expertise
• Proficiency in Type Script, SQL, and modern frameworks (Solid.js, Tantstack Start, or similar)
• Familiar with data structures, algorithms, and cloud-based architecture
• Experience with AI capabilities, LLMs, prompt engineering, and RAG is a plus
• English and German proficiency at the C1 level or higher
• Already living in or willing to relocate to Cologne, Germany

• We are an early-stage organisation that values speed of development without cutting corners on product quality
• You join as part of the core team to shape the technical foundation and story of our company
• We empower you with ownership and decision-making authority to build, test, and lead starting day one
• We ensure you have skin in the game by offering both a competitive salary and equity
• We fully cover your Urban Sports Club membership because we believe that high performance relies on active recovery
• You have the space to learn and progress quickly, encouraged by the contagious curiosity and ambition of our team