Senior Software Engineer (Y Combinator Startup)

CoCrafter (YC W24) • Munich, ND

56d • Onsite

About The Position

CoCrafter is a Munich-based startup building an operating system for subcontractor management in the construction industry. The company serves medium-sized construction companies and trade businesses across Germany and has raised €1.8 million from Y Combinator, 10x Founders, and other investors.

As a Senior Software Engineer, you will help the engineering team scale its system architecture and processes from an early-stage startup setup to enterprise-level requirements. You will remain hands-on with feature development, work closely with the CTO, and have ownership and influence over technical direction. The technology stack includes NestJS, PostgreSQL, Next.js, Docker, and AWS.

Requirements

• A degree in Computer Science or a related field.
• Experience guiding a product or system through a significant growth phase.
• Several years of backend engineering experience, ideally with TypeScript/Node.js.
• Strong knowledge of databases, performance optimization, cloud infrastructure, CI/CD, and observability.
• Enjoys hands-on feature development and delivering pragmatic solutions.
• Thinks in terms of trade-offs and takes ownership beyond individual tickets.
• Excellent German or English skills.

Nice To Haves

• Experience with the stated technology stack: NestJS, PostgreSQL, Next.js, Docker, and AWS.
• German language skills.

Responsibilities

• Evolve system architecture and optimize performance to handle 10x growth in load and meet enterprise requirements.
• Build and improve CI/CD pipelines, automated deployments, and a testing strategy that enables fast, reliable releases.
• Develop features hands-on wherever the team needs support.
• Define technical standards for observability, security, and code quality.
• Support team growth through code reviews, pair programming, Architecture Decision Records (ADRs), and mentoring.
• Prepare and document technical decisions, clearly outlining trade-offs and implications.

Benefits

• Competitive compensation, including equity through an ESOP.
• 28 days of paid vacation per year.
• WellPass.
• Team events, including bowling, mini golf, offsites, and regular feedback sessions.
• A beautiful office in the heart of Munich (Maxvorstadt).
• An outstanding network of founders, investors, and mentors to support personal and professional growth.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior