Empleos de founding ai engineer en Madrid

Factorial is launching a brand-new spinoff inside Factorial, recruiting a Founding Engineer to shape the early product and team in Barcelona. You’ll own core initiatives, move fast, and balance shipping AI features with robust reliability and user focus. You’ll work in a small, scrappy team with day-one runway, collaborating across backend in Ruby on...

Factorial HR is launching a brand-new spin-off in Barcelona and seeks a Founding Engineer to own major initiatives from day zero. You’ll ship AI-powered features with Ruby on Rails on the backend and React/TypeScript on the frontend, prioritizing practical impact over perfect theory, and you’ll help shape the product from the ground up. Joining a...

Factorial is seeking a Founding Engineer for a new spin-off inside Factorial, starting from scratch with 0 to 100M by 2030. You’ll own major initiatives, work in a fast-moving team, and contribute to agentic workflows, LLM features, and scalable AI systems. You’ll join a Barcelona-based team with flexible on-site/remote options, helping shape the product...

Jobtailor in Madrid seeks a French-speaking Full‑stack AI Engineer to collaborate with customers from onboarding to deployment. You will build features using React, TypeScript, Node.js, and Python, and design AI/ML solutions including LLM prompting and tuning to support valued customer outcomes. You will manage APIs and third‑party integrations while...

A FinTech start-up is seeking an AI Engineer to join their new Madrid office, offering a salary up to €130,000. The successful candidate will work on implementing AI and LLM functionality within their proprietary trading systems. Candidates must have a top-tier educational background in Computer Science or Mathematics, strong Python skills, and experience...

Jobtailor in Madrid seeks a French-speaking Full‑stack AI Engineer to collaborate with customers from onboarding to deployment. You will build features using React, TypeScript, Node.js, and Python, and design AI/ML solutions including LLM prompting and tuning to support valued customer outcomes.You will manage APIs and third‑party integrations while...

Merista builds the physical AI workforce for food production. This founding team robotics hire, reporting to the CTO, owns the robot’s mind, and everything between intent and motion. Full-time and on-site in Barcelona. You’ll lead technical choices across manipulation, learning, and control, collaborating with perception and mechatronics engineers to...

SLNG is seeking a Speech Model Performance Engineer to shape the technical foundation for real-time speech AI. You will benchmark, optimise, and productionize speech inference from TTS to multilingual ASR, working closely with the founding team to deliver scalable, low-latency models. You will contribute to performance engineering, benchmarking across...

Juryo is building a revenue growth system for B2C law firms and seeking a hands-on engineer to join the founding team in Barcelona. You will own end-to-end parts of the product, from database to the firm's daily view, and ship features into production that directly impact clients and revenue. You will design the pipelines, workflows, and tooling that power...

Jobtailor in Madrid seeks a French-speaking Full‑stack AI Engineer to collaborate with customers from onboarding to deployment. You will build features using React, TypeScript, Node.js, and Python, and design AI/ML solutions including LLM prompting and tuning to support valued customer outcomes.You will manage APIs and third‑party integrations while...

What Juryo is We're building the revenue growth system for B2C law firms. Not a receptionist. Agents that actually run the firm: intake, sales, onboarding, customer support, payments. A lead comes in, the agent qualifies it, closes it, chases the paperwork and collects the payment. Any channel, any hour.Seven months ago there was no revenue and two of us in...

Hello! Do you want to help us redefine how AI powers the future of Business Management software, not as an add-on, but as a core part of how people work, decide and grow?We’re looking for engineers who:Treat AI as central to their craft, not a feature to bolt on laterWant to build and ship, not debate and documentCare about whether the thing they built...

About Share Share is a venture-backed internet infrastructure network building Africa’s backbone. The company aggregates underutilized telecom infrastructure, fiber, subsea cables, and data centers, and provides ISPs with scalable access to bandwidth without traditional upfront costs. Through an open-access model, local internet providers can deliver...

HappyRobot Inc. in Barcelona is seeking a Forward Deployed Engineer to join our founding France team. You will work directly with customers to maximize value of our AI platform and contribute to onboarding, implementation, and ongoing support. The role blends strong technical work with clear communication, including full-stack development, AI/ML...

We’re a venture studio building and backing funded pre‑seed startups in agentic AI. These companies are developing foundational models and intelligent systems around real customer problems with funding, early customers, and strong founding teams already in place. We’re looking for founding design engineers who want to shape the product, experience, and...

Hello! Do you want to help us redefine how AI powers the future of Business Management software, not as an add-on, but as a core part of how people work, decide and grow? We’re looking for engineers who:Treat AI as central to their craft, not a feature to bolt on later Want to build and ship, not debate and document Care about whether the thing they built...

Limai, an AI engineering firm, is seeking a commercially strong sales professional in Barcelona to build a pipeline and close new business with C-suite and operations leaders. You will run discovery, map workflows, and present AI-enabled value that drives real operational outcomes. Join an early-stage team shaping ICPs, messaging, and the sales process while...

Joppy is seeking a hands-on technical leader to architect an enterprise AI interviewing platform in Barcelona. The role requires 3+ years of experience in technical leadership, focusing on client-specific needs while ensuring speed and compliance. The ideal candidate will have advanced expertise with AI agents and a strong understanding of production...

La primera pata de ingeniería full-time. Mucho por construir.AURA es el copiloto inmobiliario: ayudamos a personas a buscar, analizar y tomar mejores decisiones al comprar vivienda. Usamos agentes de IA para acompañar al usuario en un proceso que en España sigue siendo opaco, lento y poco digitalizado.Ya tenemos producto en el mercado (+25k usuarios...

Merista builds the physical AI workforce for food production. This is our founding team hardware hire, reporting to the CTO, owning the robot's body that we can build repeatedly, clean, maintain, and operate on a factory floor. Full-time and on-site in Barcelona.The challenge Food changes shape, sticks to tools, and behaves differently as containers empty....