Full Stack Engineer

Mercura is building AI software for the backbone of our economy. We are one of the fastest growing companies from YC’s W25 batch and raised a heavily oversubscribed round at one of the highest valuations in our cohort. After surpassing $1M in ARR in under a year, we are looking for team members ready to go all-in to help us reach our next milestone: $10M ARR by the end of 2026. One of our co-founders, Lukas, grew up in a trades family that has been active in the construction industry for over 115 years. Having worked on the construction site himself, he learned first-hand how slow and manual quoting still is in the industry. In an era where AI becomes ubiquitous, we set out on a deeply personal mission: bring AI to the backbone of our economy - to the companies that keep our world running. As a Full-Stack Engineer, you will play a key role in building AI systems end-to-end. This is a fast-paced, hands-on role for engineers with high agency, strong technical depth and founder mindset. We’re looking for experienced builders with a strong product mindset and a track record of shipping complex web applications. If you are a passionate builder who thrives at the intersection of full-stack development & AI - this is your opportunity to working alongside a team of the most stellar engineers, and shape how users interact with AI. WHAT YOU WILL BE WORKING ON Own the architecture and design of AI systemsCollaborate with and other stellar engineers across the full stack and help everyone become betterBuild data pipelines to process large-scale unstructured data efficientlyDeploy and manage software in cloud environmentsMake our backend scalable, stable and efficientTake technical ownership by making pragmatic and efficient decisions about frameworks, tools, and architecture to balance speed and qualityDevelop scalable and reusable components and API structuresWrite clean and maintainable code with sensible testing WHAT WE ARE LOOKING FOR We are looking for stellar engineers with a strong background in full-stack SWE & AI - and the potential to grow and lead teams in the future. Technical skillset: Strong experience with full-stack software engineering (React, Typescript, Python), particularity backend engineeringProven track record of architecting and building complex, production-grade software systemsCloud & DevOps: Experience with containerization (Docker, Kubernetes), cloud infrastructure (Azure/AWS/GCP), and infrastructure as code (Terraform). Commitment & Mindset: High agency & ownership: You develop new ideas and drive them in execution under minimal guidanceMission-driven: Your job is part of how you define yourself. You treat your work as a top priority, and you’re fully committed to achieving ambitious goals amid uncertaintyProduct mindset: You demonstrate product thinking on a deep level and solve problems end-to-endYou’re excited to iterate quickly and build software in a fast-paced startup environmentYou want to work in-person in Munich with a higher intensity than in a 9-5 job Leadership & Communication: You naturally take responsibility and enjoy leading teamsYou’re one of the strongest engineers in the team and make everyone else betterEveryone can come to you for advice on how to fix their hardest problemsClients respect your presence & technical expertise COMPANY PERKS Free team dinner (up to 4x/week)UrbanSportsClub membership - join our team workouts 3x/weekEasy relocation to Munich — our office is located in the Werk1 Startup Incubator, where you can rent a 1-bedroom apartment right next to the office for just €750/monthReal shares in our company with the most favorable tax treatment - no VSOP/ESOPAccess to any AI or productivity tools you need The target total compensation (cash+bonus+equity) for this position is €90,000-€200,000 annually. Actual offers and compensation are based on specific job duties, experience, performance, total rewards structure, and other considerations. ABOUT THE INTERVIEW Step 1: Intro callCasual intro meeting with one of the founders to get to know each other and introduce Mercura Step 2: Technical interview💡 At Mercura, we value our applicants' time. That's why we compensate you with €50 if we ask you to complete a take-home challenge. The technical interview consists of two parts:A take-home exercise, including a short presentation and a live-coding session.A system design interview. For the take-home exercise, we’d provide you with a task. You’ll have 2–3 hours to complete it, focusing on full-stack engineering. The challenge will be based on a practical problem we’ve encountered in our day-to-day work, so it should give you a realistic sense of what the role involves.Later, you’ll present your results to us. The presentation will include a brief algorithmic live-coding challenge, similar to a competitive programming task. Step 3: Personal FitMeet another co-founder to get a feel for our culture and working style. Step 4: On-SiteWork alongside the entire team for a day on-site from our Munich office to fully immerse yourself in our culture and collaboration style. This on-site will be paid. Step 5: Offer & Reference ChecksIf we see a great fit, you will get an offer, including a competitive compensation package with equity participation. At the same time, we’ll ask you to provide 2–3 references so we can gather additional insights into your strengths and working style.