Senior AI Engineer - AI Tech Lead
Senior AI engineer / AI tech lead who owns Mendo's AI roadmap: hands-on training, fine-tuning and operation of proprietary small language models and RAG pipelines, setting evaluation and MLOps standards across squads, and mentoring engineers. Stack: Python, TypeScript, OpenAI APIs, WebLLM/llama.cpp on-device models, Azure/AKS.
- Compensation
- €75K–€85K / yr
- Location
- Paris, France
- Work setup
- Hybrid
- Seniority
- Lead
- Employment
- Contract
- Experience
- 6+ years
- Category
- Ai engineering
- Posted
Skills
Must have
- 6+ years in ML/AI engineering with AI models or features shipped and operated at scale in production
- Proven technical leadership: set engineering standards, made architecture calls, mentored engineers
- Hands-on with LLM fine-tuning, RAG, and embeddings, and their evaluation (golden sets, LLM-as-judge, regression tests)
- Experience monitoring and optimising AI systems in production for cost, latency, and quality
- Solid software engineering fundamentals (tests, CI, observability)
- Comfortable in Python and able to work across a TypeScript codebase
- Excellent command of French and English, technical and professional
- Decision-maker: makes architecture and cost calls and can say no with evidence
- Pragmatic and product-minded: user impact over technical novelty
- Leads through influence across squads
Nice to have
- Experience with small language models (SLMs) and on-device / on-prem model deployment
Full description
- Location: Paris, Châtelet – Hybrid (2 days on-site / 3 days remote)
- Contract: Full-time (permanent)
- Team: Technology
- Compensation: €75,000–€85,000 gross annual package (base + 12% target variable) + BSPCE (equity), depending on step
🚀 About Mendo - and why this matters
We're living through the biggest technological shift since the internet. Generative AI is changing how people work - yet most teams barely scratch the surface, unsure how to turn the hype into real, everyday value. Closing that gap is exactly what Mendo does.
Mendo is the AI Transformation Platform for enterprise clients. Rather than adding yet another tool to the stack, we work right inside the AI tools teams already use - Microsoft 365 Copilot, ChatGPT, Gemini, Claude, and internal agents. From there, we guide people toward proven use cases, certify their skills, and give organizations a clear view of what's actually driving value.
And it's working. We support 100+ enterprise clients - including EY, PwC, Crédit Agricole, SNCF, La Poste, ENGIE, Groupe SEB, and Novo Nordisk - with 200+ use cases live, a user NPS of 64, and 3x GenAI ROI within months. We've raised €12M following our Series A and we're scaling fast.
Join us and you won’t just ship software. You’ll shape how leading organizations adopt the defining technology of our era, and help keep people at the center of the AI revolution rather than left behind by it. We believe humans have a vital role to play in this revolution, and we’re building the platform that keeps them there.
🧭 Core mission
Make AI a core strength of Mendo. We already ship AI across the product: proprietary small language models running on people’s own devices, retrieval and classification pipelines, and the analytics that tell organizations what drives value. You’ll own where it goes next.
Reporting directly to Arjun, you’ll set the AI roadmap, make the build/buy, architecture and cost calls, and define the quality bar every squad ships against. You stay hands-on: you train, evaluate and operate models yourself. As the practice grows, there is a path to building and leading an AI team, though that’s an opportunity, not a day-one expectation.
🛠️ Key responsibilities
1. Own the AI roadmap
- Set and prioritize Mendo’s AI roadmap with product and engineering leadership, based on user impact and evidence rather than hype.
- Make the build/buy, architecture, and model choices, and own the trade-offs between cost, latency, and quality.
- Turn new AI use cases from the squads into clear decisions: prototype fast, measure honestly, and say no when the numbers don’t hold.