Founding AI Engineer

Mondrio; Amsterdam; On-site; EUR 130,000 - 165,000; Full time

Job summary

Mondrio, a fast-growing pricing startup in Amsterdam, seeks an experienced software engineer to build AI-driven pricing evaluation and LLM infrastructure. You will own evaluation harnesses, persona simulations, model routing across Anthropic and Google, and data residency boundaries for EU customers.

Join a product-driven team shipping in a small, customer-facing environment. The role emphasizes ownership, strong production-grade LLM work, and collaboration with customers and partners in a

Qualifications

• 8+ years of engineering experience with strong and recent production LLM depth.
• Shipped LLM-powered product features to production.
• Built evals and observability for LLM systems.
• Strong communication to bridge technical gaps with non-technical clients.
• Product engineering mindset and ownership.
• Experience with AI coding tools.
• Work authorization to work in the Netherlands; visa sponsorship not offered.

Responsibilities

• Build evaluation for AI pricing recommendations: eval harnesses and benchmarks that use tracked pricing outcomes as ground truth.
• Take AI personas further. They simulate B2B buying committees and behavioral effects such as new versus existing customers, grounded in usage data and call transcripts.
• Own LLM infrastructure: routing across current (Anthropic and Google) and future models, with explicit cost, latency, and quality tradeoffs.
• Maintain infra and data residency boundaries (EU) as we add providers and scale up operations.
• Extend the MCP server that LLM agents use to drive the platform; a feature is done when an agent can drive it through MCP.
• Work within our typed ontology of pricing entities (Pydantic models for SKU, Proposition, Persona, Quote).

Skills

LLM systems

Production software

Cloud infra

Tools

Anthropic

Google AI APIs

Job description

At Mondrio, we’re on a mission to build the future of pricing: agentic pricing management. We believe that monetization should be data-driven rather than a one-time exercise. It should evolve as products, markets, or sales motions change. Our AI-native platform equips companies to bring that pricing intelligence into strategy and deal decisions.

About Mondrio

Mondrio is a fast-growing Seed stage startup built on deep pricing experience from our founding team who have run over 150 pricing engagements. We’ve seen firsthand how companies struggle with pricing and leave money on the table. On the flipside, we’ve also seen firsthand how companies that make pricing a continuous capability thrive.

We have assembled our team of 8 (pricing experts and engineers) to deliver that capability. Our main hubs are San Francisco and Amsterdam, covering the North American and European markets. We believe owning those markets are key to building a category-defining company.

We're backed by renowned investors who've helped build generational companies, and we expect to grow the team 2-3x in the coming 12 months. Joining now means you’ll actively shape the product, the team, and the way we run engagements. If that kind of ownership and entrepreneurship sounds energizing rather than daunting, then this role is for you.

About the role

Mondrio's AI recommends prices, and expert Pricing Architects stay in the loop on the high-stakes calls. Your mandate is to build the evaluation systems and feedback loops that let the AI earn more of that trust.

This is applied AI on a problem where quality is measurable in customer revenue.

What you'll do

• Build evaluation for AI pricing recommendations: eval harnesses and benchmarks that use tracked pricing outcomes as ground truth. Expert review is manual today, and you make it systematic.
• Take AI personas further. They simulate B2B buying committees and behavioral effects such as new versus existing customers, grounded in usage data and call transcripts. Automate the parts of persona training that are still manual.
• Own LLM infrastructure: routing across current (Anthropic and Google) and future models, with explicit cost, latency, and quality tradeoffs.
• Maintain infra and data residency boundaries (e.g. model calls for EU customers must remain within the EU) as we add providers and scale up operations.
• Extend the MCP server that LLM agents, including our customers' own agents, use to drive the platform. A feature is done when an agent can drive it through MCP, not when the React component renders.
• Work within our typed ontology of pricing entities (Pydantic models for SKU, Proposition, Persona, Quote) so model outputs land in structured, auditable form.

Your first 90 days

First 30 Days: Foundation & Guardrails

• Model routing across Anthropic and Google has explicit cost and latency budgets, and the fail-closed EU residency guarantee covers every model call.
• Pinpoint systemic latency, data drift, or cold-start issues in the continuous pricing loop.
• Baseline current prompt and model outputs against our typed ontology to prepare for release-gating evals.
• Conduct code reviews and lead a technical session on advanced AI/ML patterns for the team.

By Day 60: Trust & Automation

• An eval harness runs on every model or prompt change, and the team trusts its benchmarks enough to gate a release on them.
• Manual steps in persona training now run as an automated pipeline built on the same usage data and call transcripts.

By Day 90: Closed-Loop Impact

• Tracked pricing outcomes feed back into recommendation quality, so evals measure revenue impact, not proxy scores.
• Participate actively in interview loops to scale the engineering team and mentor mid-level engineers.

What we're looking for

• 8+ years of engineering experience with strong and recent production LLM depth.
• You have shipped LLM-powered product features to production and owned them after launch.
• You have built evals and observability for LLM systems yourself. Running someone else's dashboard does not count.
• Strong communication skills to bridge the technical gap around non-deterministic engineering to less savvy clients and partners
• Product engineer instincts: you pick your own scope and choose the pragmatic option over the interesting one. This is not a research-lab role.
• You can show how AI coding tools fit into your work today. We weigh that over where you studied or previous role.
• Work authorization: You need to be legally authorized to work in the Netherlands. We cannot offer visa sponsorship at this time.

Nice to have:

• Experience with MCP or building tools for LLM agents.
• Experience with platforms such as LangChain, LlamaIndex, Braintrust, OpenRouter
• Work in a domain where correctness is audited, such as pricing, billing, or payments.
• Familiarity with data residency or compliance constraints. SOC2 and GDPR shape what you build against.

Our stack

Client: Typescript, React, Vercel Chat SDK

Server: Python, FastAPI

Data: Mongo, Atlas

Security: SOC2 Type 1/Type 2, GDPR compliant, EU and US data residency

How we work

We are under ten people, and everyone ships and talks to customers. Engineers are product engineers: you own outcomes, scope your own work, and demo every week.

We appreciate fast feedback loops, real collaboration, and a team that genuinely enjoys working together. If that's how you do your best work, you'll fit right in.

There is no separate PM layer. Our SDLC is AI-native as we move to a robust software factory. Claude Code and Cursor are standard kit, and LLM agents write and review pull requests behind automated review gates. We keep pull requests small, around 500 lines, because the research on small batches holds up and we act on it.

The architecture rules are short and enforced: the API is the product so it evolves additively, business logic stays server-side, and writes are audited by default for compliance. Your evals are how we stay honest about whether the AI actually works.

What we offer

• Compensation: €130,000 to €165,000 salary
• Plus meaningful equity through our employee stock option plan (ESOP). We aim to be highly competitive on cash and generous on equity. Joining at this stage means a real stake in what we build together.
• This compensation and benefits information is based on our good faith estimate for this position as of the date of publication and may be modified in the future. Employees based outside of the US will receive a different benefits package. The level of pay within the range will depend on a variety of job-related factors, including where you place on our internal performance ladders, which is based on factors including past work experience, relevant education, and performance on our interviews or in a work trial.
• Benefits: A market-conform package, including health coverage, pension/retirement provision, generous paid time off, paid parental leave.
• Direct customer contact from early on: you hear how your recommendations land.
• Real influence on the architecture while the big decisions are still open. The AI layer is young, and you set its shape.
• A team where your impact is visible.
• An opportunity to be part of a fast-growing company.
• Daily work with, and real influence over, a cutting-edge AI pricing engine.
• Continuous exposure to the newest AI tools and techniques.