{"id":3797258,"url":"https://alion.io/job/cocrafter-senior-software-engineer-y-combinator-startup","title":"Senior Software Engineer (Y Combinator Startup)","company":{"id":674754,"name":"CoCrafter","domain":"cocrafter.com","url":"https://alion.io/company/cocrafter","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Join","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Munich, Germany"],"countries":["DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"CI/CD","optional":false},{"name":"Node JS","optional":false},{"name":"TypeScript","optional":false},{"name":"AWS","optional":true},{"name":"Docker","optional":true},{"name":"JavaScript","optional":true},{"name":"Nest.JS","optional":true},{"name":"Next.js","optional":true},{"name":"PostgreSQL","optional":true},{"name":"React.js","optional":true}],"status":"live","first_seen_at":"2026-09-14T06:24:57Z","employer_posted_date":"2026-09-14","last_verified_at":"2026-11-09T00:16:39Z","board_verified":true,"closed_at":null,"days_open":55,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":55},"description":"We are CoCrafter (YC W24), a fast-growing Munich-based startup on a mission to fundamentally transform core processes in the construction industry.\nThe construction industry is the backbone of the German and European economy - yet it has largely been overlooked by digitalization. The result? Inefficient processes and significant untapped potential.\nAt CoCrafter, we are building the Operating System (OS) for subcontractor management and already serve numerous medium-sized construction companies and trade businesses across Germany.\nWe have raised €1.8 million from Y Combinator, 10x Founders, and other top-tier investors - and are ready to take the next big step in our growth journey.\nJoin our team and help us shape the future of the construction industry!\nThe Role\nWe are a small, high-performing engineering team that is growing rapidly. As a Senior Software Engineer (m/f/d), you will ensure that our system architecture and engineering processes scale alongside the business - from our early-stage startup setup to enterprise-level requirements.\nAt the same time, you will remain hands-on: You will actively contribute to feature development wherever needed and lead by example. You will work closely with our CTO and have real ownership and influence over our technical direction.\nResponsibilities\nEvolve our system architecture and optimize performance to handle 10x growth in load and meet enterprise requirements\n\nBuild and improve CI/CD pipelines, automated deployments, and a testing strategy that enables the team to ship quickly and reliably\n\nStay hands-on and develop features wherever the team needs support\n\nDefine technical standards for observability, security, and code quality\n\nHelp the team grow through code reviews, pair programming, Architecture Decision Records (ADRs), and mentoring\n\nPrepare and document technical decisions, clearly outlining trade-offs and implications\n\nQualification\nA degree in Computer Science or a related field\n\nExperience guiding a product or system through a significant growth phase\n\nYou are a strong Senior Engineer who enjoys building features hands-on and delivering pragmatic solutions\n\nSeveral years of backend engineering experience, ideally with TypeScript/Node.js (our stack: NestJS, PostgreSQL, Next.js, Docker, AWS)\n\nStrong knowledge of databases, performance optimization, cloud infrastructure, CI/CD, and observability\n\nYou think in terms of trade-offs and take ownership beyond the scope of your individual tickets\n\nExcellent German or English skills. German is a plus\n\nBenefits\nAn outstanding network of founders, investors, and mentors to support your personal and professional growth\n\nCompetitive compensation, including equity (ESOP) - share in our success\n\n28 days of paid vacation per year to recharge\n\nWellPass to help you stay active or unwind outside the office\n\nTeam events including bowling, mini golf, offsites, and regular feedback sessions\n\nA beautiful office in the heart of Munich (Maxvorstadt)\n\nWhy You Should Join CoCrafter\nImpact: In less than a year, we have built a product that has become essential to our customers. With your work, you will help redefine an entire industry\n\nGrowth: Joining an early-stage startup is a unique opportunity. Become part of a fast-growing team and take on a key role in shaping its future!\n\nTeam: We are an interdisciplinary, dynamic, and supportive team passionate about building something extraordinary. 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