Senior Node.js Developer (Fintech)

TL;DR

Senior Node.js Developer (Node.js/Nest.js): Building and scaling the backend of platforms for Fintech and iGaming with an accent on high-performance systems and microservices architecture. Focus on designing scalable backend services, integrating third-party APIs, and optimizing high-load systems.

Location: On-site in Valencia, Spain. Full relocation support and visa sponsorship are provided.

Salary: €5,500–€6,500 per month (net)

Company

An international product company creating end-to-end tech solutions for the Fintech, iGaming, and Marketing industries.

What you will do

• Develop and maintain in-house backend platforms using Node.js and Nest.js.
• Design and implement third-party API integrations.
• Build new features and services from scratch within a microservices environment.
• Optimize performance and scalability for high-load systems.
• Write clean, testable, and maintainable code following industry best practices.
• Collaborate with frontend, QA, and product teams to ensure high-quality deliveries.

Requirements

• 5+ years of professional experience in web development.
• 3+ years of hands-on experience with Node.js and Nest.js.
• Strong knowledge of JavaScript (ES6+).
• Experience with high-load SQL and NoSQL databases such as MongoDB and MySQL.
• Proven experience implementing REST, GraphQL, and WebSockets.
• English: C1/C2 (Advanced/Fluent) required.

Nice to have

• 2+ years of experience with CI/CD, microservices, and containers.
• Experience with Kubernetes and NATS.
• Strong knowledge of TypeScript.

Culture & Benefits

• Comprehensive relocation package including tickets, hotel for up to 2 weeks, and visa support for employees and their families.
• Private medical coverage including dental, inpatient, outpatient, and maternity support.
• Transport compensation of €200 net per month.
• Urban Sport membership and partial compensation for tennis and padel lessons.
• 24 non-business days of vacation per year plus 6 paid sick days.
• Partial compensation for English and Portuguese language classes.

Hiring process

• Introductory interview with a recruiter.
• Technical assessment via HackerRank.
• In-depth technical interview.
• Final interview with the hiring team to assess cultural fit.