B2B | Fullstack (Python, Next & React) Developer | Barcelona, Spain

About the Role

We are looking for a

Senior Full Stack Developer to join an innovative team working on AI-driven solutions. You will contribute to the development of scalable and high-performing web applications, working across both frontend and backend technologies. You’ll be part of a collaborative

Scrum Agile environment , working closely with developers, designers and product managers to deliver high-quality solutions. What You’ll Do

Develop and maintain web applications using

Next.js and React . Build responsive and modern user interfaces using

Tailwind CSS . Collaborate with backend engineers to design, integrate and test APIs using

Python and FastAPI . Develop and maintain backend components in

Python . Write and maintain automated tests using pytest , Gherkin, Cucumber and Playwright. Work with

AWS cloud services , ensuring applications are scalable, reliable and secure. Troubleshoot, debug and optimize applications for performance and scalability. Work with charting libraries such as

ECharts, Chart.js or Recharts . Participate actively in

Scrum ceremonies , including daily stand-ups, sprint planning and retrospectives. Collaborate with designers, developers and product managers to deliver new features. Contribute to code quality, security and development best practices.



Mentor junior developers and provide technical guidance when needed. What We’re Looking For

4-5+ years of professional experience in Full Stack Development. Strong experience with

Next.js and React . Experience building responsive UIs with

Tailwind CSS . Experience with

Python and backend development, ideally with

FastAPI . Hands-on experience with

AWS services such as EC2, S3, Lambda and RDS. Experience with automated testing and pytest . Familiarity with

Git and modern software development practices. Experience working in a

Scrum/Agile environment . Experience with charting libraries such as

ECharts, Chart.js or Recharts . Strong problem-solving and analytical skills. Good communication and teamwork skills. Comfortable working in a fast-paced environment and dealing with ambiguity. Nice to Have

Experience with

CI/CD pipelines , particularly GitHub Actions. Experience with

Docker and containerized applications. Knowledge of serverless architectures . Experience with

SonarCloud or Snyk . Familiarity with

TurboRepo / monorepos . Experience with

Storybook for UI component development. Experience with Gherkin, Cucumber and Playwright. If you're looking for an opportunity to work with modern technologies and contribute to innovative AI-driven products within a general aviation group, we'd love to hear from you.

📌 B | Fullstack (Python, Next & React) Developer | Barcelona, Spain (Madrid)
🏢 Optiwisers
📍 Madrid