Senior Backend Engineer (Fintech)

TL;DR

Senior Backend Engineer (Fintech): Designing and optimizing robust, high-volume backend services for a global payments platform with an accent on transactional precision, idempotency, and fault tolerance. Focus on evolving distributed architectures, ensuring 100% data consistency, and proactive monitoring of mission-critical systems.

Location: Hybrid role, Madrid, Spain.

Company

hirify.global is a global player in employee benefits and engagement, operating in 31 countries and serving a B2B2C ecosystem of over 500,000 clients and 36 million consumers.

What you will do

• Design and optimize robust backend services for high-volume traffic, ensuring data consistency and system reliability.
• Evolve existing systems into scalable, event-driven architectures for global product requirements.
• Ensure high-stakes quality through comprehensive testing (unit, integration, acceptance) and performance simulations.
• Monitor service health in production using observability tools to identify and resolve bottlenecks.
• Provide technical leadership through code reviews, mentoring junior engineers, and documenting engineering standards.

Requirements

• 5+ years of experience developing production-grade applications, specifically within the Node.js ecosystem.
• Direct experience with banking systems, payment gateways, ledger systems, or reconciliation processes.
• Deep understanding of distributed systems concepts: race conditions, eventual consistency, idempotency, and message brokers.
• Systematic approach to troubleshooting complex issues in high-concurrency environments.
• Extensive experience with automated testing patterns and a "shift-left" security mindset.
• Proficiency in Spanish and English is required.

Culture & Benefits

• Meaningful job contributing to employee benefits and local economies.
• Multicultural team in a fast-paced and innovative environment.
• Emphasis on respect, wellbeing, and work-life balance.
• Inclusive workplace that embraces diversity and values unique talents.
• Equal learning and growing opportunities.