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Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Contract Founding Full Stack Engineer: AI Agent Performance Platform

About Sira AI Sira AI is building an AI Agent Performance Platform. The product helps teams observe, test, compare, optimize, experiment, and fix AI agents across every prompt, model, workflow, and tool change. The initial MVP helps AI teams upload or ingest agent runs, ins ...

Senior Full Stack Engineer | Node/TS, GCP, Hybrid/Remote

LJselection busca un Senior Full Stack Engineer en Tenerife para desarrollar APIs y microservicios en Node.js y TypeScript. Con más de 5 años de experiencia, el candidato ideal dominará GCP y bases de datos como MongoDB y MySQL. Se ofrece un contrato indefinido, jornada completa, y modalidad híbrida. Las condici ...

(Senior) Full Stack AI Engineer (F/M/X) Valencia

What We’re Looking Hello future (Software) Product Engineer. Everyone at HUBBLR is obsessed about building innovative products with our clients and we hope you are as well. We take pride in believing that the way products should be built in 2026 is a fast moving, iterative approach but, u ...

Senior Backend Engineer (Full Stack Integration) – Sustainable Tech Unicorn

Actual Talent is a talent acquisition consultancy that offers Specialized Search, RPO and Talent Solutions. Our purpose is to drive the growth and fulfillment of individuals and organizations. We facilitate individuals in finding inspiring opportunities and help organizations discover profe ...

Experienced Full Stack Engineer E‑commerce & Payments (TS/React)

Merlin Digital Partner in Barcelona is looking for an experienced Full Stack Developer with a focus on backend technologies to join our Growth Team. You will be crucial in scaling our e-commerce platform and improving core systems. The ideal candidate will bring at least 5 years of software development ...

Senior Full Stack Engineer — Fintech (Python/Django, AI/ML)

E-Frontiers is seeking a Senior Full-Stack Software Engineer for their Madrid office. This hybrid role requires collaboration with engineers to enhance a platform for client credit evaluation. Responsibilities include developing scalable applications using Python/Django and Vue/React, owning the development life ...

Remote AI‑Driven Full‑Stack Engineer for Preventive Health

Alan is seeking a full-stack engineer to develop AI-driven health solutions. The role encompasses building user-friendly applications, integrating health data processing, and contributing to preventative health efforts. With over 3 years of engineering experience, candidates should have strong product instincts ...

Remote Full Stack Engineer: Angular 16 • Java 17 & Spring

METRICA en Madrid busca un profesional con al menos 2 años de experiencia en programación Full Stack, especialmente con Angular 16+, Java 17 y Spring Boot. Se valora experiencia en Typescript, API REST, CI/CD, así como en tecnologías como Kafka y AWS. La posición ofrece un contrato indefinido y modalidad REMOTA, ...

Senior .NET Full‑Stack Engineer for AI Video Analytics

Page Personnel busca un Fullstack .Net Senior Developer para una empresa multinacional con producto propio en inteligencia artificial y videoanalytics, ubicada en Vallés Occidental. Las responsabilidades incluyen desarrollo y mantenimiento de servicios backend, diseño e implementación de APIs, y toma de decision ...

Hybrid Full Stack Engineer in Madrid | Equity & Flex Hours

A startup in sustainability technology in Salamanca is seeking an experienced web developer to join its lean team. You will be responsible for building applications and integrating RESTful APIs while ensuring effective data management. The role offers a competitive salary, annual reviews, and flexible hours in a ...

Desarrollador Full Stack: IA, .NET, Dynamics 365 y Cloud

Una empresa tecnológica innovadora en Pamplona busca un Desarrollador/a Full Stack con experiencia de 3 a 5 años. El candidato trabajará en el desarrollo de aplicaciones empresariales, incluyendo el ERP basado en Microsoft Dynamics 365. Se valorará la experiencia en .NET, SQL y programación con IA generativa. Of ...

Remote Full Stack Engineer for AI Task Design & Review

Anyone AI is looking for a skilled Full-Stack Developer for project-based consultancy work with a leading AI lab. The role requires expertise in Python and JavaScript/TypeScript, along with strong debugging skills and testing framework knowledge. Candidates should expect to design multi-file coding tasks and eva ...

Hybrid Full Stack .NET/NET Core + Angular/React – Remote

Metrica Consulting, S.L busca un/a Desarrollador/a Full Stack (.NET/NETCORE/Angular/REACT) con al menos 5 años de experiencia. El candidato será responsable de diseñar y desarrollar aplicaciones web, colaborar con equipos de producto y optimizar el rendimiento de las aplicaciones. Ofrecemos un contrato ...

Senior Full‑Stack Engineer — Node/TS, Vue/React, Hybrid

A health tech scale-up is seeking a Senior Full-Stack Engineer to develop and scale their core platform. The role involves creating high-quality software solutions and managing technical projects while collaborating with various teams. Ideal candidates have substantial experience with Node.js, TypeScript, and Re ...

Senior Full Stack Engineer (Node.js/React) – Sustainable Tech Unicorn

Actual Talent is the talent acquisition consultancy that offers Executive Search, RPO and Talent Solutions. About the client: A German Sustainable Tech Unicorn that is redefining how global corporations handle transparency. Backed by a €130M Series C investment ...

Senior Full Stack Engineer (Node.js/React) Hybrid, ESG Impact

Actual Talent is seeking a Senior Full-Stack Engineer for their Madrid Hub, which is rapidly expanding. In this role, you'll design scalable features and lead technical innovations within a high-performance engineering team. The ideal candidate will have over 6 years of experience in Full-Stack development, mast ...

Senior Full Stack Software Engineer (C#/.NET and Vue.js)

We are looking for a skilled and driven Senior Full Stack Software Engineer to join our growing team. Responsibilities Design, develop, and maintain scalable and reliable web applications using C# and Vue.js Collaborate with product and engineering managers, stakeholders, ...

Full Stack React/Node.js | Azure, CI/CD, Flexible Hours

SOLTEL Group, ubicada en Barcelona, busca un/a programador/a full stack para unirse a su equipo Scrum. El rol se centra en el desarrollo de aplicaciones web modernas utilizando React en el frontend y Node.js en el backend, en un entorno cloud Azure. Los candidatos deben tener una sólida experiencia en ...

Ingeniero de Software Full Stack Remoto (TS/React + Python)

Curaleaf International busca un Ingeniero de Software en Elche, España, para el desarrollo de su sistema de gestión de almacenes. La posición requiere expertise en tecnologías como TypeScript y React en el frontend, y Python + Quart en el backend. El candidato ideal debe tener al menos 2 años de experi ...

Senior Full Stack Engineer for AI Powered Sales Platform

Aircall, based in Madrid, is seeking a full-stack engineer to join a new team focused on an ambitious product. You'll leverage AI and voice technology, working closely with product managers and designers while taking ownership of technical direction. We offer a collaborative work environment emphasizin ...

Desarrollador Full Stack Python/React Azure CI/CD Flexible

Applus+ Laboratories en Cerdanyola del Vallés busca un/a Desarrollador/a Full Stack para unirse a su equipo de digitalización. Esta posición implica diseñar y desarrollar soluciones personalizadas utilizando herramientas de Microsoft, así como colaborar en proyectos clave para la empresa. Se requiere e ...

Remote Full Stack Engineer (Angular/Java) AI Driven Systems

WorkFlex in Barcelona is seeking an experienced Fullstack Product Engineer to join their remote-only team. You will build high-scale systems with a focus on innovation and automation, using tools like AI agents to enhance productivity and engagement across projects. The ideal candidate should have over ...

Full Stack Engineer: Own & Ship AI Powered Back Office

Tamarind Intelligence is seeking a Full Stack Developer to help shape the future of back-office solutions for small businesses. This role emphasizes problem-solving, requiring a blend of front-end and back-end development skills, particularly in Python and React. You will own projects from inception to deploy ...

Senior Full Stack Engineer for AI Powered Sales Platform

Aircall is seeking a skilled full-stack engineer to join a new team focused on building innovative solutions leveraging AI. In this role, you will collaborate with product managers and designers, taking charge of both frontend and backend development using React and Node.js. Your expertise in AWS and cloud ar ...

Full Stack Senior Software Engineer, AI Powered Sales Platform

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We’re redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace. Our ...

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    Full Stack Developer Javaangular Spain Ust Jobs in Spain Job Search Guide, Trends and Insights