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 architecting and building complex AI systems end-to-end. This is a hands-on role for engineers with high-agency and strong technical depth. We’re looking for experienced builders with a strong product mindset and a track record of shipping complex AI systems.

If you are an experienced builder who thrives at the intersection of full-stack development, AI & ML -this is your opportunity to set the technical direction, mentor others, and shape how users interact with AI.

WHAT YOU WILL BE WORKING ON

• Own the architecture and design of AI systems
• Collaborate with and other stellar engineers across the full stack and help everyone become better
• Build data pipelines to process large-scale unstructured data efficiently
• Deploy and manage software in cloud environments
• Make our backend scalable, stable and efficient
• Take technical ownership by making pragmatic and efficient decisions about frameworks, tools, and architecture to balance speed and quality
• Develop scalable and reusable components and API structures
• Write clean and maintainable code with sensible testing

WHAT WE ARE LOOKING FOR

We are looking for senior engineers with a strong background in SWE, AI & ML - and the capability to lead the team and grow into a founding engineer role.

Technical skillset:

• Strong experience with full-stack software engineering (React, Typescript, Python), particularity backend engineering
• Proven track record of architecting and building complex, production-grade software systems
• Cloud & DevOps: Experience with containerization (Docker, Kubernetes), cloud infrastructure (Azure/AWS/GCP), and infrastructure as code (Terraform).

Commitment & Mindset:

• High agency & initiative: You develop new ideas and drive them in execution under minimal guidance
• Mission-driven: Mercura is part of your life’s mission, and you are willing to make sacrifices to prioritize your job over (almost) everything else
• Product mindset: You demonstrate product thinking on a deep level and solve problems end-to-end
• You’re excited to iterate quickly and build software in a fast-paced startup environment
• You want to work in-person in Munich with a higher intensity than in a 9-5 job

Leadership & Communication:

• You have experience in leading engineering teams as a senior/staff/lead engineer
• You’re one of the strongest engineers in the team and make everyone else better
• Everyone can come to you for advice on how to fix their hardest problems
• Clients respect your presence & technical expertise

COMPANY PERKS

• Free team dinner (up to 4x/week)
• UrbanSportsClub membership - join our team workouts 3x/week
• Easy 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/month
• Real shares in our company with the most favorable tax treatment - no VSOP/ESOP
• Access 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 call

Casual 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:

1. A take-home exercise, including a short presentation and a live-coding session.
2. 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 Fit

Meet another co-founder to get a feel for our culture and working style.

Step 4: On-Site

Work 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: Reference checks

Please provide 2–3 references so we can gather insights into your strengths and working style.

Step 6: Offer

If we see a great fit, you will get an offer, including a competitive compensation package with equity participation.