Senior Software Engineer (Y Combinator Startup)

We are CoCrafter (YC W24) , a fast-growing Munich-based startup on a mission to fundamentally transform core processes in the construction industry. The 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. At CoCrafter, we are building the Operating System (OS) for subcontractor management and already serve numerous medium-sized construction companies and trade businesses across Germany. We 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. Join our team and help us shape the future of the construction industry! 🚀 The Role We 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.

At 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.

Responsibilities

Evolve our 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 the team to ship quickly and reliably Stay hands-on and develop features wherever the team needs support Define technical standards for observability, security, and code quality Help the team grow through code reviews, pair programming, Architecture Decision Records (ADRs), and mentoring Prepare and document technical decisions, clearly outlining trade-offs and implications Qualification A degree in Computer Science or a related field Experience guiding a product or sy