Full Stack Engineer

Senior Full Stack Developer

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Barcelona
3–6 Month Engagement

I’m currently working with a high-growth AI-focused technology team looking for a Senior Full Stack Developer to join them on an initial 3–6 month engagement.

This is a great opportunity for someone who wants to get involved in a technically interesting environment, working across modern frontend, backend, and cloud technologies.

What you’ll be doing:

• 
  
• Building and maintaining web applications using Next.js and React
  
• Developing responsive and intuitive interfaces with Tailwind CSS
  
• Working closely with backend engineers to design, integrate and test FastAPI services
  
• Developing backend components in Python, with a strong focus on quality and testing
  
• Deploying and managing applications across AWS
  
• Improving application performance, scalability and security
  
• Troubleshooting and optimising existing applications
  
• Working within a Scrum/Agile environment, contributing to sprint planning, stand‑ups and retrospectives
  
• Collaborating with designers, developers and product managers to deliver new features
  
• Supporting and mentoring more junior developers and providing technical guidance
  

Tech stack:

• 
  
• Next.js & React
  
• Tailwind CSS
  
• Python & FastAPI
  
• AWS – EC2, S3, Lambda, RDS
  
• Playwright, Cucumber & pytest
  
• Git & Agile/Scrum
  

Looking for:

• 
  
• 4–5+ years of experience with React / Next. xqbhyrx js and full-stack development
  
• Strong Tailwind CSS experience
  
• Solid Python backend experience
  
• Hands‑on AWS experience
  
• Strong testing and engineering practices
  
• Comfortable working in an Agile environment
  

Nice to have:

Docker, GitHub Actions, serverless architectures, SonarCloud/Snyk, TurboRepo and Storybook.