Mid BackEnd Engineer APIs
hace 2 semanas
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.
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.
- 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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