Backend Engineer (Billing)

Jobgether; España; Presencial; EUR 55.000 - 90.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

High-impact role

Career growth

Paid time off - 30+ days

Unlimited sick leave

Health coverage

Office meals

Apple equipment

Courses and conferences

Sports and wellness benefits

Referral bonus

Descripción de la vacante

Jobgether is seeking a Backend Engineer (Billing) in Spain to build a new-generation billing platform. You will own foundational billing infrastructure, APIs, pricing engines, and revenue recovery systems, working in Go within a high-impact fintech engineering team.

You will collaborate with cross-functional teams to design scalable solutions for complex B2B pricing and high-volume payment workflows, prioritizing reliability, testing, and continuous delivery in a modern engineering culture.

Formación

• 2+ years backend engineering experience using Go, PHP, Kotlin, Java, Python, Node.js or comparable backend technology.
• Strong willingness to work with Go; both experienced Go engineers and strong engineers transitioning from another backend language are encouraged to apply.
• Demonstrated experience writing and maintaining automated tests, including unit, integration, functional, and end-to-end tests.
• Strong understanding of high-load system design principles and scalable backend architecture.
• Experience working with PostgreSQL and queues or streaming technologies.
• Proactive, communicative, independent, and results-oriented approach to engineering.
• Experience with payment systems or previous work in fintech or financial services is a plus.
• Familiarity with Kafka, AWS services, and CI/CD pipelines is advantageous.
• Comfortable working in a collaborative engineering environment with code reviews, automated testing, observability, metrics, alerts, and continuous delivery.

Responsabilidades

• Design and ship foundational billing domain models and public APIs from the ground up.
• Build high-precision pricing engines and support multi-tier enterprise billing requirements.
• Design and implement resilient billing services minimizing dependencies and failure points.
• Lead automated payment retry engine across invoices to improve revenue recovery.
• Develop reliable, scalable backend services for high-load environments.
• Contribute to Billing 2.0 platform architecture, standards, and engineering practices.
• Write and maintain automated tests across unit, integration, functional, and end-to-end levels.
• Participate in code reviews, metrics and alerting practices, and continuous improvement of system reliability.
• Collaborate with product management, engineering, QA, and domain specialists to deliver end-to-end billing capabilities.

Conocimientos

Go

Backend engineering

Automated testing

High-load design

Herramientas

PostgreSQL

Kafka

AWS

CI/CD

Descripción del empleo

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend Engineer (Billing) based in Spain.

Join a fast-growing fintech engineering team building a new-generation billing platform from the ground up.
You will work on a core product module responsible for invoicing, payment retries, subscriptions, and monetization.
The role gives you ownership over foundational billing infrastructure, public APIs, pricing engines, and revenue recovery systems.
You will help design scalable solutions for complex B2B pricing and high-volume payment workflows.
Working primarily in Go, you will collaborate with experienced engineers and cross-functional specialists in a newly established Billing Stream.
There is minimal legacy to maintain, giving you the opportunity to make meaningful architectural decisions from the start.
This is a high-impact environment where strong engineering practices, automated testing, reliability, and continuous delivery are central to how products are built.

Accountabilities

• Design and ship the foundational Products & Prices domain model and public APIs from the ground up.
• Build high-precision volume and graduated pricing engines capable of supporting complex, multi-tier enterprise billing requirements.
• Design and implement resilient billing services that minimize dependencies and eliminate critical single points of failure.
• Lead the automated payment retry engine across invoices to improve revenue recovery and reduce failed-payment impact.
• Develop reliable, scalable backend services capable of operating in high-load environments.
• Contribute to the evolution of the Billing 2.0 platform and help establish its architecture, standards, and engineering practices.
• Write and maintain comprehensive automated tests across unit, integration, functional, and end-to-end levels.
• Participate in code reviews, technical discussions, metrics and alerting practices, and continuous improvement of system reliability.
• Collaborate closely with product management, engineering, QA, and domain specialists to deliver billing capabilities end to end.
• Help build a modern, maintainable billing infrastructure with a strong focus on performance, reliability, and operational excellence.

Requirements

• 2+ years of backend engineering experience using Go, PHP, Kotlin, Java, Python, Node.js, or a comparable backend technology.
• Strong willingness to work with Go; both experienced Go engineers and strong engineers transitioning from another backend language are encouraged to apply.
• Demonstrated experience writing and maintaining automated tests, including unit, integration, functional, and end-to-end tests.
• Strong understanding of high-load system design principles and scalable backend architecture.
• Experience working with PostgreSQL and queues or streaming technologies.
• Proactive, communicative, independent, and results-oriented approach to engineering.
• Ability to take ownership of technical problems, make sound decisions, and drive solutions forward.
• Experience with payment systems or previous work in fintech or financial services is a plus.
• Familiarity with Kafka, AWS services, and CI/CD pipelines is advantageous.
• Comfortable working in a collaborative engineering environment with code reviews, automated testing, observability, metrics, alerts, and continuous delivery.

Benefits

• High-impact role with the opportunity to build a new billing platform and make meaningful architectural decisions rather than inheriting a mature legacy system.
• Opportunity to work on financial infrastructure supporting modern internet businesses across subscriptions, payments, chargebacks, fraud prevention, and indirect tax.
• Collaboration with a proven, results-driven engineering team in a rapidly scaling fintech environment.
• Modern engineering culture focused on technical discussions, code reviews, strong testing practices, metrics, alerts, and fully automated CI/CD.
• Significant career growth opportunities within a rapidly expanding organisation.
• 30+ days of paid time off.
• Unlimited sick leave.
• Health coverage.
• Free office meals.
• Apple equipment to support your work.
• Support for courses and conferences to encourage continuous learning and development.
• Sports and wellness benefits designed to support employee well-being.
• Employee referral program with a bonus for successful referrals.

How Jobgether works:

We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

We appreciate your interest and wish you the best!

Why Apply Through Jobgether?

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.