Senior Backend Engineer at Lionhires

✨ The Stack take on this Lionhires job

• 🏢 Lionhires has 10 jobs here, 10 with visa sponsorship see all
• 🛂 Visa: Highly Qualified Professional permit. Education: Higher education degree guide
• 💡 No salary shown. Ask Lionhires if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Lead design and development of the core in-house platform using Node.js / Nest.js.
- Build and maintain microservices, integrating with third-party APIs and external systems.
- Optimize databases for high-load scenarios using MongoDB and MySQL; implement caching with Redis.
- Implement and maintain APIs (REST, GraphQL) and realtime communication (WebSockets).
- Apply TDD principles and write automated test suites to ensure code quality and reliability.
- Collaborate across product, UX, QA, and operations to ship scalable, production-grade features.
- Participate in CI/CD, containerization, and performance monitoring; contribute to architecture decisions.

Requirements:
- 5+ years commercial backend development experience with strong Node.js and Nest.js expertise.
- Proficient in modern JavaScript/TypeScript (ES6+) and server-side architecture patterns.
- Experience with high-load data stores (MongoDB, MySQL) and message brokers (RabbitMQ); Redis experience.
- Practical experience with RESTful APIs, GraphQL, and WebSockets.
- Strong understanding of microservices, version control (Git), and TDD practices.
- Professional working proficiency in English.
- Nice to have: hands-on CI/CD, container orchestration, and Kubernetes experience.

Responsibilities

Architect and develop a core in-house platform by designing robust microservices and integrating third-party APIs. Optimize database performance for high-load systems and ensure code quality through TDD and automated testing.

Requirements

Requires over 5 years of commercial experience in Node.js and Nest.js with proficiency in TypeScript and high-load database management. Candidates must have experience with message brokers like RabbitMQ and professional working proficiency in English.

Key skills

• Node.js — in 172 other listings on The Stack
• Nest.js — in 6 other listings on The Stack
• TypeScript — in 467 other listings on The Stack
• MongoDB — in 57 other listings on The Stack
• MySQL — in 93 other listings on The Stack
• RESTful APIs — in 63 other listings on The Stack
• GraphQL — in 90 other listings on The Stack
• WebSockets — in 16 other listings on The Stack
• RabbitMQ
• Redis
• Microservices Architecture
• TDD
• Git
• CI/CD
• Kubernetes
• JavaScript

On The Stack (as of 2026-11-05)

• Lionhires has 9 other listings on The Stack, 9 of them marked as offering visa sponsorship.
• 76 visa-sponsored jobs in Spain on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Lionhires

Is this Senior Backend Engineer role still open?

It was posted on 2026-06-25. Listings more than 30 days old may no longer be active, so check Lionhires's site before applying.

Does Lionhires offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Lionhires's site.

Where is this role located?

The listing gives the location as Spain. It is marked on-site.

What skills does this role ask for?

The listing names: Node.js, Nest.js, TypeScript, MongoDB, MySQL, RESTful APIs, GraphQL, WebSockets, RabbitMQ, Redis, Microservices Architecture, TDD, Git, CI/CD, Kubernetes, JavaScript.