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

- **Company:** Lionhires Recruitment
- **Location:** Valencia, Spain
- **Contract:** Permanent contract
- **Skills:** Automation of Tests, Node.Js, NoSQL, Performance Tuning, SQL Databases, WebSocket, Backend, Graphql, NestJS, Restful APIs
- **Published:** July 31, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-node-js-nest-js-high-load-en-valencia-ID-364334129

## About the Role

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.
#J-*****-Ljbffr

## Description

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.#J-*****-Ljbffr


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