Full-Stack Developer (React + Node / TS) | Scale-up | 60–80 K€

We are working with a German sustainability software scale-up with over 550 employees and 2,500 clients worldwide, ranging from SMEs to large corporations. Its multi-tenant platform helps companies comply with ESG regulations, manage their supply chains and improve transparency and efficiency. We are looking for full-stack developers for the Business Partner Transparency team, which provides companies with insights into their suppliers to help them comply with regulations.

📍 Madrid · Hybrid (3 days a week in the office) · €60,000–80,000 gross per year, depending on experience

What will you do?

• Design, build and optimise full-stack features using modern technologies: Node.js and TypeScript on the back-end and React on the front-end, with a focus on scalability and maintainability.
• To develop software solutions that automate complex compliance workflows for businesses of all sizes.
• Work with the product, design and engineering teams in small agile teams (4–6 people) to define, refine and implement features.
• Ensure secure, high-quality code through rigorous reviews, automated testing and continuous integration and deployment (CI/CD).
• To be responsible for the architecture and design of solutions in TypeScript, optimising performance, reliability and user experience.
• Contribute to technical strategy and decision-making by identifying opportunities for innovation and process improvement.
• Support junior developers and foster a culture of learning and technical excellence.

What we’re looking for

Essential

• 4+ years’ experience in full-stack development using Node.js, TypeScript and React.
• Experience in start-ups, SaaS companies or product-based companies.
• Practical experience with AI-assisted development and agent-based engineering environments.
• Experience in web services and integration (REST, etc.) and with Git.
• Product mindset: thinking beyond the code, about the user, the business impact and scalability.
• Agile experience: sprints, stand-ups and rapid iteration.
• English C1 or equivalent (the team is international).

What they offer

• A mission with a purpose: to tackle complex sustainability challenges alongside global industry pioneers, in a fast-growing company.
• A space for creativity, with a focus on teamwork and a culture of open communication.
• Flexibility and team spirit with a hybrid model.
• Sustainable transport options and events with global teams.