Senior Backend Engineer – Fintech, Golang, Scalable SaaS

Mambu Payments (formerly Numeral); Barcelona; Presencial; EUR 90.000 - 130.000; Jornada completa

Descripción de la vacante

Mambu Payments (formerly Numeral) is hiring Senior Backend Software Engineers to help build the next generation of bank connectivity and payment automation products with a focus on security, stability and performance.

You will own architectural decisions for high-impact projects, collaborate with Product Managers and DevOps, mentor engineers, and contribute to a fast-paced, evolving product in a cloud-native SaaS environment.

Formación

• 5+ years of professional software engineering experience, with significant hands-on Golang.
• Background in fintech, banking, or payments with regulatory understanding.
• Proven track record designing and owning complex distributed backend systems.
• Deep experience with relational databases and SQL in high-concurrency environments.
• Strong API design skills focusing on security, versioning and documentation.
• Mentor engineers and elevate engineering standards.
• Autonomous, proactive and able to resolve ambiguous technical problems.
• Curious, business-minded and product-oriented.

Responsabilidades

• Develop bank connectivity and payment automation products with focus on security, stability, and performance.
• Own architectural decisions for complex, high-impact projects and drive technical direction.
• Collaborate with Product Managers and DevOps to maintain a fast-paced, iterative delivery process.
• Apply security by design to public and internal APIs.
• Solve architectural and technical challenges to reduce complexity while creating value for customers and users.
• Mentor junior and mid-level engineers through code reviews, pair programming, and technical guidance.
• Define and execute Numeral's technical roadmap to improve team velocity and control technical debt.
• Act as a technical reference and escalation point for critical incidents and high-stakes production issues.

Conocimientos

Golang

Backend engineering

Distributed systems

Relational databases

SQL

APIs design

Security by design

Mentoring

Autonomy

Fintech/payments domain

Herramientas

GitLab CI

Kubernetes

AWS

Kafka

Descripción del empleo

Mambu Payments (formerly Numeral) is hiring Senior Backend Software Engineers to help build the next generation of bank connectivity and payment automation products with a focus on security, stability and performance.

You will own architectural decisions for high-impact projects, collaborate with Product Managers and DevOps, mentor engineers, and contribute to a fast-paced, evolving product in a cloud-native SaaS environment.