Founding Forward Deployed Engineer, French Speaking

Lully

Forward Deployed Engineer working at HappyRobot, optimizing AI solutions for global enterprises with strong customer interaction. Utilizing full-stack development skills in a collaborative team environment.

Posted 6/12/2026full-timeBarcelona • 🇪🇸 SpainMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptNode.jsPythonReactTypeScript

About the role

Key responsibilities & impact

Customer-Facing Engineering – Work closely with customers from onboarding to ongoing usage, helping them integrate and optimize our AI solutions.
Technical Development – Build new features, MVPs, and scalable solutions that directly impact customer outcomes.
Full-Stack Development – Utilize React, TypeScript, Node.js, and Python to develop robust applications and tools.
AI/ML Applications – Design, implement, and iterate on AI/ML solutions, including LLM prompting, tuning of voices, and transcribers to optimize use cases.
Integration & APIs – Manage APIs and integrations with third-party systems to ensure seamless functionality for customers.
Cross-Functional Collaboration – Partner with Product, Engineering, and Customer Success teams to deliver tailored solutions.
Iterative Problem-Solving – Continuously iterate and improve AI solutions based on customer feedback and evolving requirements.
Project Management – Prioritize and manage multiple projects under tight deadlines while maintaining high-quality results.

Requirements

What you’ll need

Native or fluent French speaker (C1/C2 level) — essential for direct communication with French-speaking customers.
Strong full-stack experience: React, TypeScript, Node.js.
Hands-on proficiency in Python.
Experience building AI/ML applications, including LLM prompting and tuning.
Ability to manage APIs and integrate with third-party systems.
Excellent communication skills with the ability to explain technical concepts to non-technical stakeholders.
Proven ability to prioritize and manage multiple projects under tight deadlines.
Founder mindset: highly independent, takes ownership, and thrives in a fast-paced environment.

Benefits

Comp & perks

Opportunity to work at a high-growth AI startup, backed by top investors.
Rapidly growing and backed by top investors including a16z, Y Combinator, and Base10.
Ownership & Autonomy - Take full ownership of projects and ship fast.
Top-Tier Compensation - Competitive salary + equity in a high-growth startup.
Work With the Best - Join a world-class team of engineers and builders

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

ReactTypeScriptNode.jsPythonAI applicationsML applicationsLLM promptingAPI managementintegrationproject management

Soft Skills

communicationproblem-solvingcollaborationprioritizationownershipindependenceadaptabilitycustomer focustime managementteamwork