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Qualifications
The ideal candidate will possess:Proficiency in both front-end and back-end technologies (e.g., JavaScript, Python, HTML, CSS). Experience with frameworks such as React, Angular, or Vue.js for front-end development. Strong knowledge of server-side programming and databases (e.g., Node.js, SQL, NoSQL). Familiarity with AI and machine learning concepts is a plus. Excellent problem-solving skills and the ability to work independently and in a team. Strong communication skills in English.
About the job
psicro seeks a Full-stack Developer in Madrid to support the development of AI-driven software products. This position covers both front-end and back-end responsibilities, contributing throughout the software development lifecycle.
What you will do
Build and maintain features for AI solutions, handling both client-side and server-side tasks
Work closely with colleagues from various backgrounds to deliver dependable software
Turn client requirements into scalable, maintainable technical solutions
Requirements
Background with modern web technologies and frameworks
Strong teamwork and clear communication skills
Interest in artificial intelligence and its real-world uses
This role is located in Madrid.
About psicro
psicro is a leading company in the field of artificial intelligence solutions, dedicated to leveraging technology to create innovative applications that enhance user experience and streamline business processes. Based in Madrid, we are committed to fostering a collaborative and dynamic work environment that encourages creativity and professional growth.
About Stack AIStack AI is on a mission to make Large Language Models accessible to everyone through an intuitive no-code platform that seamlessly integrates leading AI models (OpenAI, Anthropic, Google), various data sources (OneDrive, Google Drive, Notion), and essential SaaS tools. With the backing of Y Combinator and Gradient Ventures, we have amassed tho…
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About UsAt Visium, we empower enterprise leaders to craft their AI and data strategies, drive transformative initiatives, and effectively integrate AI into their operations—ensuring that their organizations are resilient and future-ready. As a spin-off from Visium, we are channeling our extensive enterprise knowledge into a groundbreaking product: a category-defining Agentic AI solution tailored specifically for pharmaceutical companies.Our product is anchored in AI designed for highly regulated sectors, operating where complexity, compliance, and trust are paramount. Our mission is clear: to expedite the delivery of life-saving medications to the market, making the process faster, more cost-effective, and safer, thereby unlocking significant benefits at scale.With deep roots in enterprise AI and an ambitious vision for the future, we are building a team of innovators, engineers, researchers, and product thinkers to shape a product that is not only technically superior but also transformative.Join us on a mission to redefine the future of work, creativity, and knowledge. Are you ready to help us construct the future of Agentic AI?Role OverviewWe are in search of a Full-Stack Software Engineer eager to help us create the foundation of our Agentic AI Platform from the ground up. You will translate cutting-edge AI concepts into real, production-ready software utilized by scientists and researchers daily.Your responsibilities will encompass the entire stack: from developing intuitive frontends that simplify complex AI systems to designing robust APIs and backend services that facilitate autonomous agents. You will work collaboratively with ML engineers, product designers, and domain experts to forge a platform that merges human expertise with intelligent automation.This role is hands-on and impactful, granting you significant ownership. You will play a critical role in making architectural decisions, experimenting with innovative agentic frameworks, and helping to establish what “state-of-the-art” signifies in the realm of trustworthy AI for life sciences.If you thrive in dynamic environments, are passionate about creating groundbreaking solutions, and aspire to influence the next generation of intelligent software, we would be excited to connect with you.Your daily activities might include:Designing and implementing full-stack features that bring agentic workflows to life for scientists and researchers.Creating orchestration layers, retrieval pipelines, and APIs for intelligent agents using Python and FastAPI.Developing user-friendly and high-performance frontends in React and TypeScript for configuring and monitoring AI agents.Collaborating with ML engineers to integrate LLMs, embeddings, and RAG systems into production settings.Building and maintaining cloud-native infrastructure using containers, Kubernetes, and CI/CD automation.Contributing to architectural decisions, SDK design, and enhancing the developer experience.
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Join Anyone AI, where we're on the lookout for talented Full-Stack Developers to collaborate on innovative projects with a leading AI laboratory. This is an exciting opportunity to be at the forefront of AI technology.
About the Role anyone-ai is looking for a Full-Stack Developer focused on AI training. This position is based in Spain. The role calls for experience across both front-end and back-end development to build and support software that helps train AI systems. What You Will Do Design, code, test, and maintain software applications that support AI training projects Work with cross-functional teams to improve user experiences Contribute to both front-end and back-end solutions Location This is a Spain-based position.
Join Groupon, a leading marketplace where customers explore new experiences and services daily, and where local businesses thrive. We have partnered with over a million merchants worldwide, connecting more than 16 million customers with deals across diverse categories. In a landscape often dominated by e-commerce giants, Groupon stands out as one of the few platforms genuinely committed to propelling local businesses forward based on performance.We are on an exciting journey to radically transform our business through a relentless focus on results. Despite having thousands of employees across multiple continents, we foster a culture that inspires innovation, rewards risk-taking, and celebrates success. Here, your impact can be immediate due to our scale and the rapid pace of our transformation. We blend the best of both worlds: we have the resources and scale of a large company, yet we empower individuals to have significant autonomy and drive meaningful change.About the RoleHybrid from Madrid or ValenciaAs a Full Stack AI Engineer, you will engineer the foundation of our proprietary internal platform that democratizes AI across the organization. This role goes beyond standard full-stack duties; you will construct the framework that enables various teams to develop autonomous AI agents. Your responsibilities will include designing reasoning flows, integration layers, and agent logic that empower AI to execute complex business tasks at scale. This is applied AI engineering: focusing on sophisticated system design and relentless execution rather than model fine-tuning. You will collaborate daily with a newly formed team of engineers and work closely with the AIGO team and cross-functional partners across Global Operations, Customer Satisfaction, and Engineering.
Join Our Team:At INFINIT, we are seeking a talented Full Stack Software Engineer to be an integral part of our dynamic product development team. You will play a crucial role in transforming business objectives into tangible, high-quality software solutions.About Us:Founded in 2023, INFINIT is a rapidly expanding fintech scale-up with operations across Europe and the Americas. We are committed to revolutionizing the SME sector through cutting-edge AI technology. Our comprehensive operating system centers around banking, equipping small business owners and their teams with the tools they need to efficiently manage and enhance their operations.By focusing on niche industries, INFINIT provides customized, high-impact solutions while innovating AI-driven products that unlock substantial growth for our clients. Our ambitions are global, aiming to redefine the fintech landscape for SMEs worldwide.Embark on the INFINIT journey as we reshape the SME economy and create meaningful change through innovation!
Join Version 1 as a Senior Full Stack Engineer and be part of a dynamic team that is dedicated to delivering innovative digital solutions. You will play a crucial role in the development of full-stack applications, utilizing the latest technologies in the digital, data, and cloud sectors. Your expertise will contribute to crafting scalable solutions that meet client needs.
At Affirm, we are on a mission to transform credit into a more transparent and customer-friendly experience. We empower consumers with the flexibility to buy now and pay later without any hidden fees or compounding interest.Join our Acquisition & Onboarding team as a Staff Full Stack Software Engineer within the Consumer organization. This pivotal leadership role is ideal for an engineer who can establish technical direction, influence architectural decisions, and enhance the quality and speed of full stack development across mobile, web, and backend systems. Your work will lay the foundation for the first interactions our customers have with Affirm, fostering trust, clarity, and value from the outset. As a Staff Engineer, you will design long-term technical strategies, mentor senior engineers, and amplify our team's impact through your technical expertise, operational excellence, and navigational skills in uncertain situations. Collaborate with product, design, and engineering to deliver seamless, high-performance, and accessible user experiences that drive conversion, retention, and business growth.
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Role overview psicro seeks a Full-stack Developer in Madrid to support the development of AI-driven software products. This position covers both front-end and back-end responsibilities, contributing throughout the software development lifecycle. What you will do Build and maintain features for AI solutions, handling both client-side and server-side tasks Work closely with colleagues from various backgrounds to deliver dependable software Turn client requirements into scalable, maintainable technical solutions Requirements Background with modern web technologies and frameworks Strong teamwork and clear communication skills Interest in artificial intelligence and its real-world uses This role is located in Madrid.
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About UsPerk (formerly TravelPerk) is the leading intelligent platform dedicated to travel and spend management. Designed to alleviate the burdensome, manual tasks that hinder productivity, our innovative tools automate everything from travel bookings to expense management, invoice processing, and beyond. By eradicating the shadow work that squanders valuable hours, diminishes morale, and stifles creativity, we aim to empower genuine work that makes a tangible difference.With the trust of over 10,000 companies globally, including industry leaders such as Wise, On Running, Breitling, and Fabletics, we are committed to addressing the 7 hours of lost productivity per employee each week, which amounts to a staggering $1.7 trillion challenge.Founded in 2015, Perk has expanded into a vibrant global entity with over 1,800 employees across 12 offices, including our headquarters in London and Boston. We blend innovation, control, and simplicity to revolutionize how businesses operate and enhance workplace satisfaction.At Perk, our core values drive us—embracing ownership, delivering a 7-star experience, and collaborating as one unified team. We prioritize curiosity, purpose, and mindset over mere knowledge to unleash your full potential. Our talent team is a mosaic of prominent professionals from the travel and SaaS sectors, representing over 70 countries. If you're passionate about creating a real impact and redefining how millions experience work, we would be thrilled to welcome you to our team.Learn more about us at www.perk.com.The Platform team at Perk lays the groundwork that the rest of the company relies on. We oversee shared infrastructure, core services, and developer tools that enable product teams to innovate swiftly without compromising quality. Although our work often occurs behind the scenes, its effects are ubiquitous—enhancing reliability, scalability, security, and the overall developer experience.We tackle complex, systemic challenges, make informed trade-offs, and hold ourselves accountable for the platform's long-term health. If you value leverage, clean abstractions, and building robust systems, we want to hear from you!
About ExoticcaExoticca is a trailblazing online travel agency that has transformed the way we conceive, produce, and sell long-distance dream vacations. Central to Exoticca's brand is our unwavering commitment to crafting unforgettable life experiences. We excel in offering exceptional value trips, uncovering unique destinations, and curating extraordinary travel adventures, all while demonstrating genuine care for our customers and the planet.As a dynamic, multicultural team experiencing rapid international growth, we are actively seeking talented partners to help us shape the best and most innovative travel company of our generation.What We OfferAs a Full Stack Engineer, you will have the opportunity to design and develop modern, scalable services utilizing NextJS, Node.js, TypeScript, and MongoDB.You will create robust, maintainable services that fuel our platform, ensuring optimal performance, reliability, and seamless integration across various systems.Your technical expertise and innovative thinking will contribute to the development of a modular, event-driven architecture (EDA) that facilitates efficient communication between services while supporting the ongoing growth and evolution of our e-commerce platform.Key ResponsibilitiesArchitect and develop scalable services, contributing to the advancement of a modern, event-driven architecture.Collaborate with cross-functional teams to translate business requirements into reliable, efficient, and extendable technical solutions.Implement and maintain clean service interfaces and data flows according to EDA principles, ensuring smooth inter-component communication.Produce high-quality, testable code supported by automated testing and continuous integration pipelines.Engage in code reviews, architectural discussions, and technical design sessions to uphold engineering standards and encourage knowledge sharing.Continuously enhance system design and development methodologies to support the scalability and future growth of the platform.
