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
.

📌 B | Fullstack (España)
🏢 Optiwisers
📍 España