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Founding Fullstack Engineer — AI‑Powered Energy SaaS

Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting‑edge B2B SaaS powered by AI. Join our founding team of exceptionally experienced ent ...

Founding Senior Applied AI Engineer Madrid

Naiian busca un profesional para convertir conocimiento difuso en activos operativos, estructurando taxonomías y creando sistemas de evaluación funcional. Se requiere experiencia en retrieval y NLP, con capacidad para definir métricas precisas y trabajar en equipo. La modalidad es 100% presencial en Ma ...

Founding Fullstack Engineer – AI for Climate Tech (Hybrid)

TetraxAI is seeking a Founding Team member in Barcelona to design and build software for processing vast quantities of project information, enhancing renewable energy financing. Candidates should have a proven track record in scalable software solutions, strong architecture skills, and a passion for clean techno ...

Founding Fullstack Engineer for AI Driven Platform Remote

Pragmatike is seeking a Fullstack Engineer to join a fast-paced startup developing an AI-native B2B SaaS product. This role focuses on building and shipping product features across the stack, using modern AI tools to enhance development efficiency. The ideal candidate will have 3–8+ years in software engineering ...

Senior Software Engineer Fullstack Founding Team

Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of exceptionally experienced entrepreneurs ...

AI / Fullstack Engineer

SLNG is building the backbone for real-time speech AI , enabling developers to run voice applications anywhere in the world with local compliance and ultra-low latency. Our founding team comes from the core of AI and developer tooling in the USA , with experience scaling platforms tru ...

Founding Python/React Full Stack Engineer (AI) – Madrid

Founding Software Engineer / Developer (Python React Full Stack) Madrid onsite to €85,000 Are you a technologist with a range of skills across the full stack? You could be progressing your career in an impactful, hands-on Founding Software Engineer role for a successful ...

Founding AI Platform Reliability Engineer

Naiian busca un operador de infraestructura de IA para asegurar que sus sistemas funcionen sin problemas a medida que escalan. El candidato ideal tendrá experiencia en CI/CD, observabilidad y control de costos, trabajando en Madrid. El rol ofrece un salario entre 80.000 € y 90.000 € brutos anuales, basado en ...

Founding AI Platform Reliability Engineer

Naiian busca un profesional para asegurar la infraestructura y la operativa de su plataforma de IA en Madrid. El rol se centra en la fiabilidad, el despliegue y la gestión de costos para evitar que la plataforma se vuelva insostenible. El candidato ideal tendrá experiencia en CI/CD, capacidad de observ ...

Senior Software Engineer Fullstack Frontend Founding Team

Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of exceptionally experienced entrepreneurs: <li ...

Senior Software Engineer Fullstack Frontend Founding Team

☀️ Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of ex ...

Senior Software Engineer Fullstack Frontend Founding Team

☀️ Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of ex ...

Senior Software Engineer Fullstack Frontend Founding Team

Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting‑edge B2B SaaS powered by AI. Join our founding team of exceptionally experienced ent ...

Senior Software Engineer Fullstack Frontend Founding Team

☀️ Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of exceptionally experien ...

Senior Software Engineer Fullstack Frontend Founding Team

☀️ Accelerating the Energy Transition, One Algorithm at a TimeTetraxAI is revolutionizing renewable energy infrastructure development, making it100x faster and 10x cheaperthrough a cutting-edge B2B SaaS powered by AI. Join our founding teamof exceptionally experienced entr ...

Senior Software Engineer Fullstack Frontend Founding Team

☀️ Accelerating the Energy Transition, One Algorithm at a Time TetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through a cutting-edge B2B SaaS powered by AI. Join our founding team of except ...

Founding AI Engineer ML & LLM for FinTech in Madrid

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 Mathe ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding team in Barce ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our foun ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our foun ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding t ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating system for regulation. Six months in, with ~100% ...

Founding Engineer

AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About the role We are hiring an engineer who will own the critical pieces of that architecture. You will work dir ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi‑agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full‑Stack Engineer to join our founding t ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating system for regulation. ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating system for regulation. ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding ...

Founding Engineer

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 ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating system for regulation. Six mo ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding team ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a driven Full-Stack Engineer to join our founding ...

Founding Engineer

About the role AI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders. About Reversa Reversa is the operating system for regulation. ...

Founding Engineer

We are building the autonomous backbone for the modern B2C law firms We are live, in production, and backed by a sophisticated architecture featuring multi-agent pipelines, durable workflows, and context engineering. We are now looking for a drivenFull-Stack Engineerto join our founding team ...

Founding Engineer

About the roleAI-native engineer who will own critical pieces of the operating system for regulation we are building at Reversa. Extreme ownership and close work with the three co-founders.About ReversaReversa is the operating system for regulation. Six months in, with ~100% MoM gro ...

Founding AI Driven Forward Deployed Engineer

Reversa is seeking a skilled individual for a hybrid role that demands both regulatory knowledge and technical expertise to drive innovation. You will own a section of our product, contributing to real-world solutions in regulation. This fast-paced environment values builders who have a track record in tech o ...

Founding AI Engineer — Regulation Infra, Equity

Reversa is seeking an AI-native engineer to own critical operating system pieces for regulation in Madrid. You will work closely with co-founders and shape products from day one. Successful candidates have a strong engineering background, experience with knowledge graphs, and the drive to tackle complex chall ...

Founding Software Engineer Python React AI

Founding Software Engineer Python React AI Founding Software Engineer / Developer (Python React Full Stack) Madrid onsite to €85,000 Are you a technologist with a range of skills across the full stack? You could be progressing your career in an impactful, hands‑on Founding ...

Founding Software Engineer Python React AI

Founding Software Engineer / Developer (Python React Full Stack) Madrid onsite to €85,000 Are you a technologist with a range of skills across the full stack? You could be progressing your career in an impactful, hands-on Founding Software Engineer role for a successful ...

Founding Senior AI Platform / SRE Engineer

La pregunta no es si sabes operar infraestructura. La pregunta es si sabes operar una plataforma de IA cuando la fiabilidad ya no es solo disponibilidad — cuando hay que controlar latencia, costo, rate limits de proveedor, timeouts, saturación de workers, observabilidad de inferencia y rutas de fallback an ...

Founding Senior Applied AI Engineer 1

En Naiian creemos que la diferencia entre un sistema de retrieval que escala y uno que envejece a los seis meses no está en el modelo de embeddings, ni en el vector DB elegido, ni en la última técnica de reranking que apareció en arXiv la semana pasada. Está en los schemas, en los golden sets, en si la eva ...

Founding Senior Applied AI Engineer 2

Si llevas tiempo construyendo aplicaciones con LLMs, probablemente has pasado por la curva. El primer prototipo deslumbra: un prompt bien afinado, una respuesta convincente, una demo que vende sola. El segundo flujo añade retries y validaciones, porque el primero se rompía en cuanto un usuario hacía algo i ...

Founding AI Engineer: Multimodal Agents & Product

Hiretech está buscando un/a Founding AI Engineer para liderar el desarrollo de su plataforma de inteligencia artificial. Este rol se centra en la ingeniería de producto y así ofrecerá un impacto significativo en la tecnología. El candidato ideal tendrá más de 5 años de experiencia en ingeniería de soft ...

Founding AI Engineer Startup Retail IA

Buscamos para nuestro cliente, una startup tecnológica europea especializada en inteligencia artificial aplicada a entornos físicos de alto tráfico (como centros comerciales, aeropuertos, destinos de ocio y cruceros), un Founding AI Engineer. El Proyecto Estamos construyen ...

Founding AI First Fintech Software Engineer

Talent-R is seeking experienced software engineers for a foundational role in Barcelona. You'll build financial infrastructure for AI agents, making critical decisions on architecture and product direction. Work closely with a solid team from top companies in a fast-paced environment. The ideal candida ...

Founding Senior Applied AI Engineer 2

Si llevas tiempo construyendo aplicaciones con LLMs, probablemente has pasado por la curva. El primer prototipo deslumbra: un prompt bien afinado, una respuesta convincente, una demo que vende sola. El segundo flujo añade retries y validaciones, porque el primero se rompía en cuanto un usuario hacía algo i ...

Founding Senior AI Platform / SRE Engineer

La pregunta no es si sabes operar infraestructura. La pregunta es si sabes operar una plataforma de IA cuando la fiabilidad ya no es solo disponibilidad — cuando hay que controlar latencia, costo, rate limits de proveedor, timeouts, saturación de workers, observabilidad de inferencia y rutas de fallback an ...

Founding Senior AI Platform / SRE Engineer

La pregunta no es si sabes operar infraestructura. La pregunta es si sabes operar una plataforma de IA cuando la fiabilidad ya no es solo disponibilidad — cuando hay que controlar latencia, costo, rate limits de proveedor, timeouts, saturación de workers, observabilidad de inferencia y rutas de fallback ante ...

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