Senior Backend Software Engineer

€90k – €115k • No equity Berlin or Munich (Hybrid) Help build the operating system for constructionConstruction is one of the world's largest industries, yet much of it still runs on spreadsheets, PDFs and endless email chains. At Capmo, we're building the platform that helps thousands of construction professionals deliver projects on time and on budget. We're looking for a backend-first engineer (roughly 80% backend / 20% frontend) who enjoys designing scalable systems, solving complex engineering challenges, and owning features from idea to production. While our teams work across the entire stack, your primary focus will be backend architecture, APIs, cloud infrastructure, integrations and system reliability. You'll occasionally contribute to our React frontend when needed, but we're looking for someone whose expertise and passion lie in backend engineering. What you'll work onYou'll join one of our small, highly autonomous product teams where engineers own features end-to-end from discovery through implementation and production. Some of the areas we're investing in include expanding our platform with Project Financials, bringing cost management, budgeting, payments and complex third-party integrations into the Capmo ecosystem. You'll:Design and build scalable backend services using Node.js and TypeScript.Architect APIs, backend services and distributed systems that power our platform.Design reliable integrations with third-party services.Own features end-to-end from technical design through production.Solve performance, scalability, security and reliability challenges.Collaborate with frontend engineers to deliver complete product experiences.Occasionally contribute to our React frontend when required (roughly 20% of your work).Participate in architecture discussions, code reviews and mentoring.Help shape engineering standards and improve developer productivity. Our Engineering CultureWe believe great engineers own outcomes, not just code. Our teams are intentionally small, giving every engineer meaningful ownership and the ability to make technical decisions that directly impact the product. We heavily embrace AI-assisted software development. Every engineer has access to modern AI coding tools, but we expect engineers to understand, review and stand behind every line of code they ship. AI helps us move faster, engineering judgment is what keeps quality high. We value:Strong engineering fundamentals over framework hype.Product thinking over ticket execution.Ownership over hand-offs.Pragmatism over unnecessary complexity. What we're looking for6+ years of professional software engineering experience.Strong backend engineering experience building production systems.Excellent knowledge of Node.js, TypeScript, AWS and PostgreSQL.Experience designing scalable APIs, distributed systems and cloud-native architectures.Strong system design skills and the ability to break down complex business problems into elegant technical solutions.A product mindset, you understand customer problems, not just technical ones.High ownership and the ability to independently drive projects from concept to production.Experience working across the stack, with enough React knowledge to comfortably contribute when needed. What we offerBecome a shareholder: Share in Capmo's long-term success through our employee stock option program (VSOP).Invest in your growth: Receive an annual €1,000 development budget plus two dedicated Development Days each year to support your personal and professional learning.Choose the benefits that fit you: With EGYM Wellpass, enjoy unlimited access to 90+ gyms and swimming pools across Germany, or choose a lunch subsidy or mobility budget instead.Plan for the future: We contribute an additional 20% toward your company pension plan (Germany only).Hybrid by design: We believe great collaboration happens in person, while focused work can happen anywhere. We work together in the office three days per week and remotely for two.Join an exceptional team: Work alongside talented, ambitious people in a collaborative environment where you'll have real ownership and plenty of opportunities to grow.Culture Day Off: Take an additional day off each year to celebrate the moments and occasions that matter most to you. Nice to haveExperience with application security and secure software development.Experience with React.Experience building B2B SaaS products.Experience using AI coding tools such as Claude Code, Cursor or GitHub Copilot.If you're looking for a place where your decisions directly shape the product and where engineering excellence is genuinely valued, we'd love to meet you.