Mercura automates quoting in the construction industry with AI agents. We rank in the top 5% of YC’s W25 batch by revenue, quadrupling our revenue in just 8 weeks. After YC, we closed a 8x oversubscribed round with top-tier investors and angels.

Mercura automates quoting in the construction industry with AI agents. Our software frees sales teams from manual back-office tasks and lets them process requests in minutes instead of days.

We rank in the top 5% of YC’s W25 batch by revenue, quadrupling our revenue in just 8 weeks. After YC, we closed a 8x oversubscribed round with top-tier investors and angels, and we contrinue to grow massively.

As the AI Engineering Lead, you will play a key role in architecting and building complex AI systems end-to-end. This is a hands-on leadership 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 AI, ML, data engineering, and full-stack development - 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 lead other stellar engineers across the full stack
• Build, deploy and optimize AI agents end-to-end
• Work with embeddings and fine-tune LLMs for classification and reranking
• Optimize algorithms for product search
• Apply RLHF & DPO to align LLMs with human feedback
• Build data pipelines to process large-scale unstructured data efficiently
• Make our backend scalable, stable and efficient

What we're 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 NLP, LLMs, Embeddings, ML, and AI-powered applications
• Experience with full-stack software engineering (React, Typescript, Python)
• Proven track record of architecting and building complex, production-grade AI 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: You view Mercura as a long-term commitment and your job is one of your top priorities
• 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 more intensity than in a 9-5 job

Leadership & Communication:

• You have experience in leading engineering teams as a senior/staff/lead engineer
• You have the potential to grow into the founding engineer role
• 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

Software Stack: Typescript, Python, React, Next, Docker, Terraform, Postgres AI Stack: Vector databases, LLMs, Embeddings, observability & evals