Full-Stack Software Engineer (80-100%)

We are a ConTech SaaS startup that is rethinking cost-related processes in the construction industry. Our application helps SME construction companies unlock essential productivity gains through an end-to-end cost estimation process.

We’re looking for a skilled full-stack software engineer to design, develop, and maintain a scalable mobile and web application. You’ll be responsible for both frontend and backend systems, collaborating in close collaboration with the UI/UX, testing and revenue team to deliver easy-to-use and user-friendly new functionality.

TasksCo-Architect & Scale — Act as the technical sparring partner to the CTO. You won’t just execute tasks; you will actively debate, design, and make shared decisions on how to evolve the architecture of a live platform serving 200+ growing customers.

Accelerate Feature Delivery — Help us scale up our shipping velocity. You’ll build and deploy across the entire stack to deliver robust new features to our active user base.

Operational Ownership — Gain deep, end-to-end knowledge of the codebase to become a trusted second-in-command. You’ll be fully equipped to troubleshoot live issues, ensure high availability, and keep the engine running smoothly on your own.

Fortify the Foundation — As we scale, you will help upgrade our engineering practices - improving CI/CD pipelines, automated testing, and code quality to ensure we build fast without breaking things.

Bridge Tech and Business — Collaborate directly with our revenue and product teams to translate customer feedback into scalable technical solutions that drive the next phase of our company's growth.

Requirements

• 5+ years of professional experience as a Full-Stack Software Engineer.
• Solid CS Foundation: Bachelor’s degree in Computer Science, Software Engineering, or a related fi eld (or equivalent practical experience).
• Strongly Typed Language Expertise: Strong profi ciency in object-oriented programming.
• We use C#, but a deep foundation in Java, Go, C++, or Rust is perfectly fi ne if you are eager to learn.
• Real-World Team Git Experience: You know how to collaborate in a shared repository.
• Branching, pushing, pulling, creating PRs, and resolving the occasional merge confl ict shouldn't scare you.
• DevOps Mentality: You value effi cient engineering workfl ows.
• You are comfortable working with CI pipelines and are excited to help us design and implement our continuous delivery (CD) practices and expand our automated testing.
• Language: Fluent in English.
• Startup Mindset: Proactive, independent, and comfortable navigating ambiguity.
• You don't just wait for tickets to be assigned; you see problems and propose solutions.
• Nice To Have
• Fluent in German.
• In-depth experience with C#.Experience with Typescript/Unity/Flutter.
• Experience with Firebase.

Benefits

Be part of an early-stage team shaping the future of digital construction.

Work directly with senior leadership on high-impact projects.

Opportunity to experiment, learn fast, and grow your career.

Competitive salary + equity option.

We look forward to hearing from you!