Senior Backend Engineer - Node.js/Nest.js (High-Load)

Lionhires is recruiting for a Senior Backend Engineer to join a tech-focused team in Valencia. You will architect and build the core in-house platform, delivering high-impact features and scalable microservices while integrating with various third-party APIs. Key responsibilities include performance optimization for SQL and NoSQL databases, implementing RESTful APIs, GraphQL, and WebSockets, and championing TDD with comprehensive automated testing. English proficiency required.

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