Senior Full Stack Developer (TypeScript)

Your mission As a key member of our Engineering team, you won't just be writing code—you'll be solving complex problems and taking full ownership of features from concept to deployment. You will have a direct impact on a product used by thousands of construction professionals to build the world around us. In your first few months, you might: Design and build new AI features, such as our recently launched AI agent for editing BoQs or automated AI bidder recommendations Collaborate with product managers and designers to shape the user experience and technical direction of our core product. Architect and implement modular packages and services in our monorepo to improve the structure and maintainability of our codebase How We Build: Our Engineering Culture We believe in a calm, collaborative, and productive engineering environment. We trust our engineers and give them the autonomy to do their best work. Our approach includes: Agile & Fast-Paced: We practice trunk-based development with daily releases to get value into our users' hands quickly. Quality by Default: We maintain a comprehensive Cypress E2E test suite and enforce strict typing, linting, and formatting rules to keep our codebase clean and maintainable. DevOps Mindset: Our well-oiled CI/CD pipeline deploys to AWS via Kubernetes, with our entire infrastructure managed as code using Terraform. Collaboration & Transparency: We value open discussion, constructive code reviews, and a culture where the best idea wins, regardless of who it comes from. Your profile We're looking for an experienced engineer who is passionate about building great products. You'll be a great fit if you have: Significant professional experience building, shipping, and maintaining complex web applications using TypeScript. Deep expertise in Node.js for backend development and a strong command of React for the frontend. A pragmatic approach to problem-solving and a high sense of ownership, feeling comfortable driving projects independently. Experience working in collaborative, agile product teams. Excellent communication skills in English. Bonus Points For (Nice-to-Haves): Experience with our infrastructure stack (AWS, Kubernetes, Terraform). Experience with building and maintaining CI/CD pipelines. An interest in data engineering or machine learning. Why us? Competitive Compensation: A competitive salary above the market average. Work-Life Balance: Choose to work 100% remotely or from our modern office in Berlin. We offer flexible working hours to fit your life. Top-Notch Equipment: A new MacBook Pro to ensure you have the best tools for the job. A Great Team: Regular company off-sites and team events that connect us as people, not just colleagues. Job Security: A permanent contract in a stable, well-funded company. About us Cosuno – Revolutionizing construction through technology. We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity. Why Cosuno? Artificial intelligence is the key to our solution: it analyzes millions of price data points and helps construction companies create precise and efficient bids. This not only saves our customers time but also helps them avoid unnecessary costs. But for us, it's not just about technology – it's about the people who drive it. At Cosuno, you will work with creative minds who are reshaping the construction industry. We believe in diversity because we know that the best ideas come from different perspectives. An integrative and inclusive work environment is a matter of course for us. Join us – Build the future of construction.