Empleos de full stack engineer annotator en Barcelona

**Job Description** **About the Team:** Our Technology team drives the evolution of our Engineering, Data, Product and User Experience functions. Within this group, the GenAI Experiences team builds generative AI products that define the future of news and business intelligence for millions of users across the Wall Street Journal and Dow...

Alan Precision is hiring engineers to build a first-in-class prevention platform. You’ll work across AI-driven health insights, data pipelines, and a mobile-first app, delivering personalized prevention plans. The role spans frontend mobile (React Native), web backend (Python/Flask), and enterprise-scale integrations, with health-focused impact across...

Leyton's Mainloop team in Sant Cugat del Vallès seeks a Full-Stack Engineer to own production software end-to-end in an AI-assisted workflow. This on-site role helps build a new engineering group supported by a long‑standing international portfolio. Two levels are open—junior and senior—with responsibility split between the Product Owner and the...

A global technology company is seeking a Senior Full Stack Engineer in Spain to strengthen its brand. This role involves leading projects in an agile environment, mentoring team members, and ensuring the quality of code. The ideal candidate will have over 7 years of experience, strong proficiency in Java, CI/CD practices, and familiarity with AWS...

Bark is seeking a Senior Full Stack Engineer based in Spain for a fully remote role. You’ll own both frontend and backend work in the Acquisition domain, building scalable APIs and marketing tooling, including AI-powered internal tools to streamline campaigns and autonomous workflows. You’ll collaborate with marketing, product and design to ship...

A leading technology company in Spain is seeking a Frontend & Backend Developer Engineer for IoT Digital Platforms. You will develop innovative digital solutions for IoT devices and manage cloud services, requiring expertise in both relational and non-relational databases. The ideal candidate will have strong programming skills, hands-on experience with...

bunch is hiring a Full Stack Engineer with a frontend focus for its Platform Core team. You’ll build foundational product experiences, shaping frontend architecture and collaborating across PMs, Designers, QAs, and Engineers to deliver end-to-end features. With 5+ years of experience, you’ll drive frontend depth, work with TypeScript and Design Systems,...

Treatwell is looking for an AI Software Engineer to join the AI Engineering team and build internal tools and customer-facing features with a strong AI-first mindset. You will work with TypeScript, Node.js and React, collaborating with the Chief AI Officer and diverse stakeholders to rapidly prototype and iterate, while ensuring quality, testing, and...

Pyramid Consulting, Inc. is seeking a skilled Full-Stack Software Engineer to join our client’s tech team in Barcelona, Spain, with remote work option. The role requires strong backend with Golang and frontend with React/Next.js/React Native, and 4+ years of hands-on experience. You will design, develop, and maintain scalable full-stack applications,...

En Minsait, creemos en el talento que impulsa el cambio. Únete a nuestro equipo de desarrollo de software en sector Retail como Full Stack Developer (Java / React) con mayor foco Backend y sé parte de esta transformación, y trabajar en una modalidad de trabajo FULL REMOTE desde cualquier punto de España, o en un formato híbrido en A Coruña. Lo que...

About Journi is a London-based technology consultancy where we partner with businesses to support their technology needs from strategy through delivery. We provide bespoke software development, digital transformation consulting, team augmentation, and ongoing technical support, helping clients build custom products and scale their capabilities quickly...

AI Deployment Consultant (Onsite – Barcelona)We are working with a fast-scaling AI startup building voice and text AI agents that run inside live production workflows for mid-market and enterprise clients across Europe and LatAm - not demos or pilots, real agents doing real work, live within days rather than months. Backed by €1.9M in pre-seed funding...

Kodify is hiring a remote Full-Stack Developer to join a high-traffic platform serving millions of users. The role emphasizes React, Next.js, Node.js and GraphQL with a NoSQL stack, and requires collaboration with product owners, designers and domain experts to ship scalable features. You’ll own features from design through deployment, advocate clean code...

Grupo Digital busca un ingeniero/a senior Full Stack con base sólida en Java/Spring Boot para desarrollar aplicaciones empresariales modernas y acelerar el SDLC con IA. Trabajarás con microservicios, REST APIs y pipelines CI/CD, integrando IA en generación de código, testing y documentación. Serás parte de un equipo que diseña, desarrolla y mantiene...

N-iX is looking for a Senior Full Stack Engineer in Spain. In this role, you will design and implement APIs in Go and build user-facing features in React. Collaborating with a cross-functional team, you'll ensure high performance experiences for users. Ideal candidates will have 5+ years in software development with strong experience in backend APIs,...

bunch is building the operating infrastructure for private markets. As a Full Stack Engineer with a frontend focus in our Platform team, you’ll shape frontend architecture, contribute to backend services, and help maintain our Design System. You will ship end-to-end features that empower thousands of users managing billions in assets. You’ll collaborate...

mediasmart, part of the Affle group, is looking for a Senior Full Stack Engineer to join our product technology team. You will develop for our main products: the API and the web frontend, serving large agencies and direct customers across the globe. You will own features end-to-end from concept to deployment, collaborate with cross-functional teams, and...

Treatwell, Europe’s leading bookings platform, is seeking a full-stack engineer to join our Product Engineering team. You’ll focus 60% on frontend and 40% on backend across 13 markets, building SEO foundations, site performance, experimentation, analytics instrumentation, and growth-oriented product surfaces. You’ll partner with marketing and growth...

Explore Group is seeking a Full Stack Product Engineer to ideate, architect, and scale our enterprise AI platform for technical commercial teams in manufacturing. You will own both frontend and backend work, shaping product strategy, backend architecture, cloud infrastructure, and UI design to deliver customer value. We value practical builders with startup...

Hired is seeking an experienced engineer to design, develop, and maintain high-quality code for training and optimizing AI models. You will evaluate model performance and rank responses across domains, while producing clear explanations and rationales for evaluations. The role also leads supervised fine-tuning with the creation and maintenance of...