Mid BackEnd Engineer APIs

hace 2 semanas

Barcelona, Barcelona, España ADDYOU A tiempo completo

Our client is looking for a Mid BackEnd Engineer with a strong focus on API development to join their Product Development team. You will contribute to designing and building scalable backend services that power high-impact, data-driven products in the renewable-energy technology space.

If you enjoy solving complex problems, writing clean and reliable code, and working with modern cloud-native architectures, this role will place you right at the core of a mission-driven engineering environment.

Central Barcelona (very well connected).

SaaS platform

Key Responsibilities
  • Develop, maintain, and document RESTful APIs for both public and internal use.
  • Write clean, maintainable, and testable code following best engineering practices.
  • Troubleshoot, debug, and optimise existing APIs and backend services.
  • Diagnose and solve complex problems across API layers, database queries and cloud environments.
  • Participate in code reviews and contribute to architectural and performance improvements.
  • Collaborate with cross-functional teams to design and deliver scalable interfaces.
  • Stay up to date with the team's technologies and share knowledge proactively.
Requirements

Mandatory

  • 3–5 years of experience in backend development, with strong focus on APIs.
  • Solid knowledge of TypeScript and (experience in other languages is welcome, but TypeScript understanding is essential).
  • Experience working with cloud environments (AWS preferred, but other cloud providers are also acceptable).
  • Experience with relational databases (PostgreSQL is a strong plus).
  • Strong understanding of REST API design and principles.
  • Experience using Git, pull requests and CI/CD workflows.
  • Knowledge of clean code principles, design patterns, software architecture, cloud fundamentals and API-first development.
  • Strong communication skills in English, both written and verbal.

Nice to Have

  • Experience with Serverless, especially AWS Lambda and API Gateway.
  • Experience with event-driven systems (Kafka, AWS SQS, RabbitMQ…).
  • Knowledge of Terraform or Infrastructure as Code.
  • Familiarity with observability practices and tools: Grafana, CloudWatch, Express logging, etc.
  • Awareness of database modelling best practices.
  • Interest in mentoring or sharing knowledge within the team.
What Our Client Offers
  • The opportunity to work on impactful products that accelerate the adoption of clean and reliable energy.
  • A collaborative, mission-driven and diverse engineering environment.
  • Continuous learning in cloud, serverless, APIs, and scalable architecture.
  • Hybrid work modality (2 days of home office)
  • Salary range 40K–50K (depending on experience)

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