B2B | Fullstack (Python, Next & React) Developer | Barcelona, SpainAbout the RoleWe 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 DoDevelop 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 For4-5+ 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 skil

📌 B | Fullstack (Barcelona)
🏢 Optiwisers
📍 Barcelona