--- title: 'Senior Full Stack Developer (TypeScript) at Cosuno' canonical: 'https://feeny.ai/job/senior-full-stack-developer-typescript-cosuno-berlin-71hmf542wakp' type: 'job' last_seen: '2026-09-11' --- # Senior Full Stack Developer (TypeScript) at Cosuno - **Company:** Cosuno - **Location:** Berlin, Germany - **Compensation:** €80k–€100k - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-03-01 - **Last confirmed live:** 2026-09-11 - **Apply:** https://jobs.ashbyhq.com/cosuno/424ba681-0989-4961-82ad-10286e4aae71/application **Skills:** TypeScript, Node.js, React, Web Application Development, AWS, Kubernetes, Terraform, CI/CD pipelines, Data engineering, Machine learning > As a Senior Full Stack Developer, you will design and build complex AI features and modular services for a construction technology platform. You will collaborate with product teams to shape user experience and maintain a clean, maintainable codebase using TypeScript, Node.js, and React. ## Job description ## 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. ## About Cosuno ## Company Overview - **One-liner**: Cosuno provides an AI-driven SaaS platform that digitizes and automates procurement, tendering, and subcontractor management for the construction industry. - **Entity Type**: Private (Series B) - **Headquarters**: Berlin, Germany - **Founded**: 2019 - **Founders**: Christoph Berner, Fritz Cramer, Maximilian Seifert ## Core Business - **Primary industry/industries**: Construction Technology (PropTech), Procurement Software - **Target customers**: General contractors, property developers, architects, and subcontractors (B2B, Enterprise, SMB) - **Mission or purpose statement**: To re-invent construction software by bringing transparency, efficiency, and digitization to the traditionally paper-driven procurement process. ## Products & Services - **Cosuno Platform (Intelligent Tendering & Award)**: A SaaS platform enabling users to create tenders in minutes with AI error-checking, centrally dispatch offers, receive digital bid submissions, compare prices automatically, and manage digital awards and rejections. - **Cosuno Network & Marketplace**: Access to a network of 250,000+ qualified subcontractors, planners, and architects in the DACH region. AI-powered matching recommends suitable bidders, and a marketplace allows companies seeking projects to view current tenders. - **AI Price Assistant**: An AI tool trained on millions of tender data points that delivers real-time, customized price forecasts for calculations and negotiations, helping users benchmark against market rates. - **Costing & Controlling Module**: Features quantity determination, cost calculation, historical price database, AI market prices, and award success analysis. - **Documents & Contracts Module**: Cloud document storage, digital evidence management, contract conclusion, and change order management. - **Project Control & Communication Module**: Project collaboration, task management, project dashboards, and transparent bidder communication. - **System Integrations**: Seamlessly integrates with SAP, RIB iTWO, Nevaris Build, and BRZ. ## Market Standing - **Valuation/Market Cap**: Not publicly disclosed - **Key Metric**: Total funding of $45M (Series B). - **Notable Investors/Partners**: Spark Capital (led Series A), Cherry Ventures, SIGNA via APIC Investments, PERI. Angel investors include Hakan Koç, Christian Bertermann, Johannes Reck, Carsten Thoma, and others. - **Growth Signals**: - Processes over €100 billion in offer volume on its platform. - Network grew to 250,000+ qualified contractors. - Reports a 14% increase in contract award profit for users due to more bids. - Reports a 50%+ time savings through automation of manual processes. - Processes over 100 employees (as per company website). ## Competitive Advantages - **AI-First Approach**: The platform is built on AI for matching bidders, generating price forecasts, and checking tender errors, creating a defensible data moat from millions of tender data points. - **DACH Market Dominance**: Possesses the largest construction network in the DACH region (250,000+ contractors), creating strong network effects. - **Deep Industry Specialization**: Solely focused on construction procurement, a massive but traditionally offline and complex market, making the solution highly tailored and sticky. - **Proven ROI**: Clear metrics on time savings (50%+) and profit margin improvement (14%) provide strong value propositions for risk-averse construction firms. ## Strategic Focus - **Product Development**: Continuously enhancing the AI capabilities of the platform (Price Assistant, AI agent for tender creation). - **International Expansion**: Previous funding rounds were explicitly earmarked for entering new markets beyond the DACH region. - **Network Growth**: Expanding the marketplace and network of subcontractors to deepen the value for all users. ## Why Work Here - **Culture**: Values-driven environment focused on modernizing a legacy industry. Emphasis on using cutting-edge AI to solve real-world problems. - **Work Policy**: Hybrid workspace based in Berlin. Employees engage in a combination of remote and on-site work (two offices in Berlin). - **Team & Growth**: A rapidly growing team of ~100 employees, offering significant career growth opportunities in a well-funded Series B startup. - **Engineering Focus**: Heavy emphasis on AI and automation engineering roles, with a modern tech stack (TypeScript). The company is actively hiring for Senior AI Engineers, Analytics Engineers, and Full Stack Developers. ## Sources 1. [cosuno.com](https://www.cosuno.com/en/company) 2. [cosuno.com](http://cosuno.com/web/en) 3. [builtin.com](https://builtin.com/company/cosuno) 4. [cbinsights.com](https://www.cbinsights.com/company/cosuno) 5. [welcometothejungle.com](https://www.welcometothejungle.com/en/companies/cosuno) ## Other roles at Cosuno - [Senior AI Product Engineer](https://feeny.ai/job/senior-ai-product-engineer-cosuno-berlin-m6gseryrr7a8) — Berlin, Germany - [Engineering Manager](https://feeny.ai/job/engineering-manager-cosuno-berlin-facvmv7rkbgk) — Berlin, Germany - [Sales Development Representative](https://feeny.ai/job/sales-development-representative-cosuno-berlin-1271bhyta9bb) — Berlin, Germany - [IT Administrator](https://feeny.ai/job/it-administrator-cosuno-berlin-jv0wff9ntzwq) — Berlin, Germany - [Senior Product Manager - General Contractors](https://feeny.ai/job/senior-product-manager-general-contractors-cosuno-berlin-75xcqaetv5td) — Berlin, Germany - [Senior Product Manager - Marketplace](https://feeny.ai/job/senior-product-manager-marketplace-cosuno-berlin-8brcz4vzys5z) — Berlin, Germany - [Senior Analytics Engineer](https://feeny.ai/job/senior-analytics-engineer-cosuno-berlin-ckm2wamja5pb) — Berlin, Germany - [Technical Product Manager](https://feeny.ai/job/technical-product-manager-cosuno-germany-3zxg0y5scyky) — Germany - [AI Automation Engineer](https://feeny.ai/job/ai-automation-engineer-cosuno-berlin-cbfksyww0xaw) — Berlin, Germany - [Founder's Associate Internship – AI-Native](https://feeny.ai/job/founder-s-associate-internship-ai-native-cosuno-berlin-stejpp9gr26h) — Berlin, Germany