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# Senior Full-Stack Developer (NodeJS/Typescript)

- **Company:** osapiens
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Agile Methodology, Artificial Intelligence, Automation of Tests, Continuous Integration, Node.Js, Software Systems, TypeScript, Web Services, ReactJS, Backend, Git, Front End Software Development
- **Published:** November 6, 2026
- **Apply:** https://www.tecnoempleo.com/senior-full-stack-developer-nodejs-typescript-osap/react/rf-755110fc7297c3377744

## About the Role

Strong experience (ideally 5+ yrs) in full-stack development, using Node.JS / TypeScript and React.JS.

 - Hands-on experience leveraging AI-guided development practices and collaborating within agentic, AI-driven engineering environments.
 - Expertise in web services development and integration (REST etc).
 - Familiarity with Git for version control and collaboration.
 - Strong product mindset - you think beyond code, considering user experience, business impact, and scalability.
 - Agile experience - comfortable working in sprints, participating in stand-ups, and iterating quickly.
 - Excellent communication skills (C1 or equivalent) in English. German and/or Spanish skills are a plus, (but not necessary).

## Description

Design, build, and optimize full-stack features using modern back-end technologies, ensuring scalability and maintainability. You´ll use Node.JS and TypeScript on the backend, and React.JS on the frontend.

 - Develop and enhance innovative software solutions that automate complex compliance workflows for businesses of all sizes.
 - Collaborate closely with product managers, designers, and engineers in small, agile squads (4-6 people) to define, refine, and implement features.
 - Ensure high-quality, secure, and efficient code through rigorous reviews, automated testing, and continuous integration/deployment (CI/CD) practices.
 - Own the architecture and design of Typescript based solutions, optimizing for performance, reliability, and user experience.
 - Contribute to technical strategy and decision-making, identifying opportunities for innovation and process improvements.
 - Mentor and support junior developers, fostering a culture of learning and technical excellence within the team.