Senior Backend Engineer

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 engaging 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 distract 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 TypeScript 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, preference in a startup or fast-paced environment GitHub or a portfolio showcasing your capabilities and expertise Proficiency in TypeScript, 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 of development without cutting corners on product quality You join as part of the core team 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 ambitious of our team Can't wait to chat! “Hustle the day, analysis at night, strengthening something outstanding.” Period. Erik & Dana