Senior Backend Developer (Node.Js)

ppAre you a Senior Backend Engineer who thrives on building high-performance architectures and scaling complex systems from scratch?We are looking for a Node.js/Nest.js expert to spearhead the development of our core, in-house platform, driving innovation across high-load environments.If you want to own your code, work with cutting-edge microservices, and make a tangible impact on a rapidly growing ecosystem, this is your next big move./p h3About the Client /h3 pOur partner is a tech company building product engineering across Fintech, iGaming, and Marketing.They turn innovative ideas into high-performing engines and launch them at scale.As their exclusive recruitment partner, Lionhires manages their full-cycle talent acquisition./p h3What You Will Do /h3 ul libArchitect and develop /b the core in-house platform, taking new, high-impact features from initial concept to production scale./li libDesign and implement /b robust microservices and build seamless integrations with various third-party APIs./li libOptimize database performance /b for high-load systems, working extensively with both SQL and NoSQL solutions./li libChampion code quality /b by applying TDD (Test-Driven Development) principles and writing comprehensive automated tests./li libCollaborate cross-functionally /b to ensure scalability, reliability, and high availability across all backend services./li /ul h3What You Bring /h3 ul libDeep Backend Expertise: /b 5+ years of commercial web development experience, with a heavy focus on Node.js and Nest.js./li libHigh-Load Database Management: /b Proven experience handling high-load database environments, specifically using MongoDB and MySQL./li libAdvanced Communication Protocols: /b Practical experience implementing RESTful APIs, GraphQL, and WebSockets./li libMessage Brokers Caching: /b Hands-on experience working with RabbitMQ and Redis (experience with Nats is a plus)./li libArchitectural Mastery: /b Solid understanding of microservice architecture and version control via Git./li libQuality Testing Mindset: /b Strong grasp of TDD principles and a habit of writing clean, testable code./li libLanguage Skills: /b Professional working proficiency in English (Intermediate level or higher)./li /ul h3Nice-to-Haves /h3 ul li2+ years of hands-on experience working with CI/CD pipelines, containerization, and microservices./li liDirect experience with Kubernetes./li /ul h3What’s in It for You /h3 ul libFinancial Growth: /b Highly competitive salary with structured annual compensation reviews./li libFull Relocation Support: /b A complete relocation package including covered flight tickets and a 2-week hotel stay upon arrival./li libLegal Peace of Mind: /b Official EU/Spain employment contract, including registration and support for your family members./li libWork-Life Balance: /b 23 working days of paid annual vacation to ensure you rest and recharge properly./li libProfessional Development: /b Continuous learning opportunities, challenging tasks, and language development support with partial class compensation./li libCulture Community: /b Vibrant team-building activities, custom birthday gifts, and access to our upcoming Social Club featuring over 50 events per year./li /ul /p #J-*****-Ljbffr

li /ul h3What You Bring /h3 ul libDeep Backend Expertise: /b 5+ years of commercial web development experience, with a heavy focus on Node.js and Nest.js. /li libHigh-Load Database Management: /b Proven experience handling high-load database environments, specifically using MongoDB and MySQL. /li libAdvanced Communication Protocols: /b Practical experience implementing RESTful APIs, GraphQL, and WebSockets. /li libMessage Brokers Caching: /b Hands-on experience working with RabbitMQ and Redis (experience with Nats is a plus). /li libArchitectural Mastery: /b Solid understanding of microservice architecture and version control via Git. /li libQuality Testing Mindset: /b Strong grasp of TDD principles and a habit of writing clean, testable code. /li libLanguage Skills: /b Professional working proficiency in English (Intermediate level or higher). /li /ul h3Nice-to-Haves /h3 ul li2+ years of hands-on experience working with CI/CD pipelines, containerization, and microservices. /li liDirect experience with Kubernetes.

li /ul h3What’s in It for You /h3 ul libFinancial Growth: /b Highly competitive salary with structured annual compensation reviews. /li libFull Relocation Support: /b A complete relocation package including covered flight tickets and a 2-week hotel stay upon arrival. /li libLegal Peace of Mind: /b Official EU/Spain employment contract, including registration and support for your family members. /li libWork-Life Balance: /b 23 working days of paid annual vacation to ensure you rest and recharge properly. /li libProfessional Development: /b Continuous learning opportunities, challenging tasks, and language development support with partial class compensation. /li libCulture Community: /b Vibrant team-building activities, custom birthday gifts, and access to our upcoming Social Club featuring over 50 events per year. /li /ul /p #J-*****-Ljbffr