Senior AI Engineer – AI Tech Lead

Mendo

. Set and prioritize Mendo’s AI roadmap with product and engineering leadership .

Posted 10/23/2026full-timeParis • FranceSenior💰 €75,000 - €85,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in AI and ML engineering, with a strong focus on model fine-tuning, evaluation, and production deployment. Proven ability to lead technical teams, set engineering standards, and communicate complex AI concepts effectively to diverse audiences.

Highest-signal resume keywords

AI Engineering LeadershipLLM Fine-TuningProduction AI Systems OptimizationPython ProgrammingBilingual in French and English

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Applicant Tracking System Keywords

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Hard Skills

Machine Learning EngineeringAI Model EvaluationOn-Device Model DeploymentRegression TestingData CurationMLOps StandardsSoftware Engineering FundamentalsCost OptimizationLatency MonitoringQuality Assurance

Soft Skills

Technical MentorshipTeam CollaborationCuriosity for AI LandscapeStrong Sense of PrioritiesNatural Rigor

Tools & Technologies

PythonTypeScriptAI PipelinesEvaluation HarnessesGolden Sets

Industry Keywords

AI RoadmapArchitecture DecisionsProprietary Language ModelsEvidence-Based DecisionsAI Trade-Offs

Tech Stack

Tools & technologies

PythonTypeScript

About the role

Key responsibilities & impact

Set and prioritize Mendo’s AI roadmap with product and engineering leadership
Make build/buy, architecture, model, cost, latency, and quality decisions
Turn new AI use cases into prototypes and evidence-based decisions
Explain AI trade-offs to non-technical colleagues
Define evaluation and MLOps standards across squads
Review AI work shipped across the product
Keep models, prompts, and pipelines current as tooling and APIs evolve
Train, fine-tune, and evaluate proprietary language models, including on-device small language models
Curate and maintain datasets, golden sets, and evaluation harnesses
Own production AI feature health and debug incidents end to end
Mentor the existing AI engineer and support engineers working on AI topics
Help hire future AI profiles
Document technical decisions and implementations
Report directly to Arjun and shape the AI practice and roadmap

Requirements

What you’ll need

6+ years in ML / AI engineering
AI models or features shipped and operated at scale in production
Proven technical leadership, including setting engineering standards, making architecture decisions, and mentoring engineers
Hands-on experience with LLM fine-tuning, RAG, embeddings, and their evaluation
Experience with golden sets, LLM-as-judge, and regression tests
Experience monitoring and optimizing AI systems in production for cost, latency, and quality
Solid software engineering fundamentals, including tests, CI, and observability
Comfortable with Python and able to work across a TypeScript product codebase
Excellent command of French and English, both technical and professional
Experience with small language models and on-device / on-prem model deployment is a strong plus
Natural rigor and a feel for evaluation-driven development
Curiosity for the fast-moving AI landscape without chasing hype
Strong team spirit and sense of priorities
Alignment with Mendo's values: Learning, Innovation, Excellence, Kindness, Transparency

Benefits

Comp & perks

12% target variable
BSPCE (equity) under the Series A policy
Hybrid model with 2 days on-site and 3 days remote
Path to building and leading an AI team
Learning environment with a team passionate about new technologies and generative AI
Young, supportive culture where everyone helps each other
Meaningful mission helping make AI accessible and impactful for everyone