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

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:

• A take-home exercise, including a short presentation and a live‑coding session.

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.

Seniority level

• Mid‑Senior level

Employment type

• Full‑time

Job function

• Engineering and Information Technology

Industries

• Software Development

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