Java Full-Stack Developer at SGS | Madrid

Groupon, Inc. is seeking an AI Full-Stack Developer to join the team in either Madrid or Prague. The position centers on building and integrating artificial intelligence features throughout the technology stack, helping connect millions of consumers with local businesses around the globe. Key responsibilities Design and implement solutions that incorporate AI technologies into both front-end and back-end systems Collaborate with fellow developers to achieve seamless integration and dependable performance Suggest and develop improvements that enhance user experiences and make business operations more efficient through artificial intelligence Location This role is based in Madrid or Prague.

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.

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.

Key Responsibilities- Design the architecture of web pages based on provided layouts.- Develop reusable code for future projects.- Implement mobile-first design principles to ensure optimal user experience on smartphones.- Monitor and enhance website performance for speed and scalability.- Exhibit self-management skills and effectively prioritize tasks.Essential Qualifications- Proficiency in Laravel, PHP, MySQL, HTML5, CSS3, JavaScript, Sass, Git, VueJS, and TailwindCSS.- Minimum of 3-5 years of proven experience in PHP Laravel, HTML, CSS, and JavaScript development.- Deep understanding of SCSS and Blade templates (Laravel).- Familiarity with VueJS, AMP, and TailwindCSS is preferred.- Experience in responsive and adaptive design methodologies.- Knowledge of SEO best practices.- Proven experience with collaborative version control systems.- Background in an agile team environment.- Excellent English communication skills, both verbal and written.- Strong grasp of Object-Oriented design principles and methodologies.- Experience with databases, including relational and NoSQL databases.- Competence in integrating third-party APIs and libraries.- Experience with search servers (e.g., Elastic or Algolia) is a plus, but not mandatory.- If you have a GitHub account or have contributed to open-source projects, we'd love to hear about it in your cover letter.

Yopeso brings nearly two decades of experience in software development, building both large-scale systems and tailored products. The company employs more than 300 professionals across five global locations, with a steady focus on growth, transparency, and professionalism throughout each project. Authenticity, curiosity, and ambition shape daily work at Yopeso. Teams operate with trust and integrity, maintaining open communication and a commitment to secure, reliable software. Each project emphasizes high quality and dependable performance. Collaboration plays a central role. Agile teams share knowledge and support one another, working efficiently to deliver software that aligns with the company’s core values and meets real-world needs.

Role overview SGS seeks a Senior .NET Full Stack Developer based in Madrid. This role centers on building and enhancing web applications that drive business objectives. The position requires hands-on work across both front-end and back-end, with a focus on delivering reliable, high-performance solutions throughout the software development lifecycle. What you will do Develop and maintain web applications using .NET and related frameworks Collaborate with cross-functional teams to design and implement solutions that meet business needs Improve application performance and uphold code quality standards Participate in all stages of the software development process, from initial planning through deployment Requirements Extensive experience in both front-end and back-end development Strong collaboration skills with both technical and non-technical colleagues Dedication to maintaining high standards in code quality and application performance

ResilientCo is looking for a Full Stack Engineer in Madrid to help build and improve applications across both front-end and back-end systems. This position involves working closely with colleagues from different areas to deliver projects that support the company's technology goals. Role overview This role focuses on developing features and maintaining systems that serve users and internal teams. Expect to contribute to both user interfaces and server-side logic as part of a collaborative group. Collaboration Full Stack Engineers at ResilientCo participate in team discussions and planning, sharing ideas to improve how applications look and function. Working with designers, product managers, and other engineers is a regular part of the job. Location This position is based in Madrid.

Join Yopeso, a leading software development company with over 20 years of experience in delivering innovative software solutions, ranging from large-scale applications to niche products. Our dynamic team of more than 300 professionals across five locations is deeply committed to cultivating an environment of growth, transparency, and professionalism.At Yopeso, we embrace values such as authenticity, curiosity, and ambition. These principles empower us to forge robust connections within our community and with our partners, ensuring trust, integrity, and transparency in all our endeavors. We continuously challenge ourselves to develop high-quality, high-performance, and secure software solutions that meet the evolving needs of our clients.Our collaborative and agile approach enables passionate professionals to work efficiently in teams, focusing on creating impactful products that resonate with our authentic selves.

Role Overview Miratech is hiring a Senior Full Stack Developer in Madrid with expertise in Java and Angular. This position focuses on building and maintaining complex web applications that serve a range of client needs. What You Will Do Design, develop, and maintain web applications using Java and Angular Work closely with cross-functional teams to deliver software solutions Support the full software development lifecycle, from concept through deployment Location Madrid

Join the innovative team at thebridge3 as a Lead Instructor for Full Stack Development. In this part-time position, you will play a crucial role in shaping the next generation of developers by delivering engaging and comprehensive instruction in full stack technologies. You will leverage your expertise to create a dynamic learning environment that fosters student success and encourages hands-on experience.

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!

We are seeking a talented Full Stack Developer with expertise in .NET and Angular to join our dynamic team at Sopra Steria. In this role, you will work on diverse projects in the Telco, Energy, and Utilities sectors, contributing to innovative solutions that drive our clients' success.As a Full Stack Developer, you will be responsible for designing, developing, and maintaining web applications, collaborating closely with cross-functional teams to deliver high-quality software solutions.

Join our dynamic team at thebridge3 as a Lead Full Stack Instructor. In this pivotal role, you'll be responsible for guiding students through comprehensive full stack development courses, leveraging your expertise to foster a collaborative and innovative learning environment. Our instructors are passionate about technology and committed to equipping the next generation of developers with the skills necessary for success in the tech industry.

Join causaprima as a Senior Full-Stack Engineer, where your expertise will shape engaging interfaces for our agents. You will develop intuitive dashboards, approval workflows, real-time data visualizations, and a counterparty portal that enhances connectivity across our network.Your ResponsibilitiesReal-Time Communication & Architecture — Implement WebSocket-driven event streaming, agent notification routing, and dynamic query management.Visualizing Financial Forecasts — Create probabilistic cash forecasts with uncertainty bands and detailed insights into invoices and assumptions.Counterparty Portal Development — Build a user-friendly portal for suppliers and customers to track invoice statuses, manage disputes, and view payment commitments securely.Approval Interface Design — Craft a human-in-the-loop interface for reviewing agent reasoning and verifying source documents before action approvals.Session Management & Authentication — Integrate OAuth 2.0 / OIDC, manage JWT with tenant context, and handle session lifecycles with Redis, including magic link token generation for the counterparty portal.API/BFF Layer Development — Develop a TypeScript service layer to mediate between the React frontend and the Python agent backend, securing REST, GraphQL, and WebSocket endpoints.MCP Server Implementation — Establish a Model Context Protocol endpoint for integrating external AI agents, facilitating interoperability across the supply chain.Qualifications5+ years of experience architecting TypeScript/React applications in production environments.Strong systems design skills, with a focus on components, contracts, data flows, and failure modes.Extensive experience in real-time architectures, including WebSockets and event-driven frontends.Proven ability in designing data visualization systems and API layers for multi-tenant SaaS applications.Solid understanding of frontend security practices, including CSP, CSRF, session management, and input sanitization.Proficient in using AI coding tools with strong code review capabilities to ensure secure outputs.Possess a strong product sense, making data-backed recommendations and articulating opinions effectively.

Join dLocal and Shape the Future of Payments!At dLocal, we empower leading global enterprises to streamline payment processing across 40 emerging markets. Our innovative solutions not only enhance conversion rates but also facilitate seamless payment expansion, helping our clients tap into the fastest-growing markets worldwide. As both a payment processor and merchant of record, we enable businesses to thrive in these dynamic environments.By becoming part of our team, you will collaborate with over 1,000 diverse professionals from 30+ nationalities, shaping an international career that positively impacts millions of lives every day. We are a community of builders who embrace challenges, prioritize customer satisfaction, and are driven to innovate. If this resonates with you, we are excited for you to join us!About Agentic Development at dLocalOur Agentic Development product is designed to accelerate software delivery by transforming well-defined requirements into ready-to-review pull requests, tightly integrated with our Software Development Life Cycle (SDLC). This strategic initiative aims to reduce lead times, enhance quality and consistency, and empower developers to focus on higher-value tasks.Role OverviewWe are looking for an experienced AI Product Manager to lead and expand our Agentic Development product. Your primary objectives will be to enhance capabilities, foster product adoption, and significantly reduce development lead times. You will collaborate with teams across Development Productivity, Engineering, AI, Security, and other domains to shape the product roadmap, implement improvements in planning, execution, and validation workflows, and establish the necessary telemetry and change management for enterprise-wide adoption. This role demands hands-on software development experience, alongside expertise in product management and applied AI.Desired MindsetWe value a builder-first mentality in our Product Managers who are outcome-driven, focused on measurable improvements in lead time and quality. You should possess a systems-thinking approach that connects upstream inputs to downstream results, and a pragmatic understanding of AI that clarifies where agents excel and where they fall short, enabling safe instrumentation, gating, and iterative processes.

SpotLab is at the forefront of innovation in biopharmaceutical research, specializing in the development of advanced AI solutions for diagnostics. Supported by esteemed organizations such as the Gates Foundation and the European Commission, SpotLab was established in 2018 with the vision of creating trustworthy AI technologies that enhance healthcare accessibility, from blood cancers to neglected tropical diseases.We are currently in search of a dynamic Business Development Lead to champion our AI oncology products, notably our groundbreaking MEDULAI platform designed for blood cancer diagnostics. In this role, you will be instrumental in crafting innovative business models that not only promise scalability but also substantial health benefits. You will be responsible for developing strategic market access frameworks and pioneering new markets for our state-of-the-art AI solutions.This position reports directly to the CEO.Key ResponsibilitiesIdentify and cultivate new business opportunities within the medical technology sector, focusing on securing distribution agreements with med-tech companies that specialize in microscopy scanners and laboratory information systems (LIS).Lead the negotiation and design of strategic agreements, including data licensing, intellectual property, IT deployments, and collaborative performance metrics.Foster and maintain robust, trusting relationships with clients and strategic partners.Contribute significantly to the formulation and execution of product commercialization strategies, encompassing market analysis, customer segmentation, and pricing strategies.Advocate for our solutions within the digital pathology landscape.Translate complex AI concepts into compelling narratives that resonate with diverse stakeholders, producing persuasive communication materials that enhance product promotion and drive commercial success.Collaborate closely with internal teams across Technology, Clinical, and Operations to ensure product development aligns with market demands.

zooplusse is seeking a Senior AI Engineer in Madrid with a focus on the Software Development Life Cycle (SDLC). This position centers on designing and implementing AI solutions that support both product development and operational efficiency. Role overview This role involves leading efforts to improve system architecture and optimize machine learning models. Collaboration with teams from different disciplines is a key part of the work, as projects often span multiple areas of the company. What you will do Design and implement AI-driven solutions for software development and operations Collaborate with cross-functional teams to refine system architecture Work on optimizing machine learning models to enhance performance Who we are looking for The ideal candidate brings deep experience in artificial intelligence and a strong background in software development. Leadership in technical projects and a drive to advance technology are important qualities for this role.

Join the forefront of innovation at a global leader in language services and technology! We are seeking a dynamic Business Development Manager to cultivate new business partnerships and serve as a strategic ally within our AI Solutions division, DataForce.DataForce is an expanding segment dedicated to delivering high-quality data for Human-Machine Interaction to some of the world's most esteemed technology firms. Our team specializes in the collection, enhancement, and processing of training data essential for Machine Learning across various AI sectors.As part of the TransPerfect family, the largest provider of language and technology solutions globally, you will have the opportunity to work with a diverse team across over 100 international locations.Key Responsibilities:Identify and research potential clients in the target market to understand their business and technical requirements.Qualify and quantify opportunities, driving prospects from lead generation to successful closure.Ensure exceptional customer satisfaction and success.Draft and implement strategic business plans.Become a subject matter expert on our products, processes, and industry trends.Maintain detailed records of business opportunities using TransPerfect’s CRM system.Coordinate with production and technology teams across various time zones and cultures.Generate and manage profitable business deals.Track and manage KPIs, providing internal and client-facing status updates, including executive summaries on account health and opportunities.Participate in tradeshows and contribute to marketing efforts through case studies and social media engagement.Provide accurate weekly forecasts and daily reports.Assist in developing overall plans and budgets, ensuring financial health across assigned client engagements.Manage communications with stakeholders regarding business and accounts.Support training and adoption of technologies and services for both internal and client teams.

About EverfieldEverfield is dedicated to acquiring, developing, and enhancing European vertical market and specialized software companies, equipping them with essential tools for advancement. Our mission is to ignite ambition, stimulate growth, and unlock opportunities within Europe’s software ecosystem.Companies within the Everfield ecosystem adopt a decentralized model, retaining their unique teams, brands, and offices while concentrating on their core strengths—product development and customer support. Everfield aids in talent acquisition, HR, and offers expert guidance on financial and operational matters to bolster the growth of European B2B SaaS enterprises. Established in 2022, Everfield has expanded its ecosystem across seven countries and continues to grow.Who We AreVozitel is a technology company specializing in conversational automation solutions and intelligent communication management for contact centers. Our platform revolutionizes customer service, boosts productivity, and provides measurable returns through voice virtual agents and generative AI tools applied to real business processes.As part of Everfield, an international software group, we benefit from product investment, excellence standards, and access to a global community of engineering and knowledge. This partnership enables us to continually innovate and deliver greater value to our clients while maintaining the agility and impact-driven approach that defines us.Our clear objective is to lead the future of Voice AI and intelligent business communications from Spain to the world.We are looking for curious, courageous individuals with a growth mindset who want to embark on this journey and help shape the future of business communications with us.