Senior Fullstack Engineer remote – International client

Senior Fullstack Engineer in Madrid/Barcelona (remote) for an International client

Job role: Senior Fullstack Software Engineer

Job description: A Senior Fullstack Software Engineer with high experience in Dev Ops, Kubernetes & Python.

Location: Madrid/Barcelona (Remote)

Languages required: English (C1)
MANDATORY

Minimum experience: 5 to 7 years

Rate: 260-285€/day

• We are seeking a Senior Fullstack Software Engineer with strong expertise in Python and solid experience in JavaScript (preferably React
  
  JS). The ideal candidate will take a lead role in backend architecture and development with a strong emphasis on performance, reliability, and scalability, supporting thousands of concurrent users and high-frequency external integrations.
• The role includes contributing to frontend development with modern technologies, making key technical decisions, driving architectural improvements, ensuring high code quality through comprehensive testing (including Playwright for end-to-end and integration tests), and collaborating with engineering and product stakeholders. This position requires hands-on experience with our technology stack and a proactive, improvement-oriented mindset.

• Lead backend architecture and development to ensure high performance, scalability, and reliability.
• Develop and maintain backend services using Python and FastAPI.
• Contribute to frontend development using React
  
  JS, Typescript, Vite, and Tailwind.
• Drive technical decision-making and promote best practices across the engineering team.
• Collaborate closely with engineers, product managers, and stakeholders to deliver robust and user-friendly solutions.
• Participate in architectural reviews and contribute to continuous improvement initiatives.
• Work with databases and storage technologies such as Redis, and manage migrations with Alembic.
• Coordinate with the infrastructure team regarding deployments and operations in environments using Azure Dev Ops, Docker, Kubernetes, and AWS.

• Python (5+ years)
• FastAPI
• JavaScript / Typescript
• React
  
  JS (3+ years preferred)
• Typescript
• Tailwind
• Vite
• Redis
• Alembic (migrations)
• Azure Dev Ops
• MongoDB
• PostgreSQL
• Docker
• Kubernetes
• AWS
• (Infrastructure knowledge is a plus but not mandatory)

• English (C1)

• 260-285€/day