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payabl.

Senior Python Backend Developer – SWAT Team

payabl.

Senior Backend Developer designing and building a scalable internal payment gateway platform in Portugal with strong Python expertise and engineering leadership.

Posted 4/22/2026full-timeRemote • 🇵🇹 PortugalSeniorWebsite

Tech Stack

Tools & technologies
AWSCloudDjangoDockerGoogle Cloud PlatformMicroservicesPerlPython

About the role

Key responsibilities & impact
  • Design and build scalable Python-based microservices supporting a new internal gateway enablement platform.
  • Take ownership of system architecture decisions, ensuring long-term scalability, performance, and maintainability.
  • Develop tools and services that improve efficiency of existing Core Gateway and Gateway Projects teams.
  • Integrate and abstract third-party APIs and payment-related external services.
  • Define engineering standards for the SWAT team (coding practices, API design, service structure).
  • Collaborate closely with DevOps to design and improve CI/CD pipelines, deployment strategies, and observability.
  • Lead code reviews and ensure high engineering quality across the team.
  • Work across legacy (Perl) and modern systems, enabling gradual modernization.
  • Identify bottlenecks in existing systems and design technical solutions to remove them.
  • Act as a technical reference point within the SWAT team.

Requirements

What you’ll need
  • 6+ years of backend engineering experience, with strong Python expertise.
  • Proven experience designing and delivering microservices architectures at scale.
  • Strong knowledge of FastAPI or Django (FastAPI preferred).
  • Experience building systems in high-performance, distributed environments.
  • Strong experience with API design (RESTful services, event-driven architecture is a plus).
  • Hands-on experience with Docker, CI/CD pipelines (GitLab preferred).
  • Cloud experience (AWS or GCP).
  • Strong understanding of system design, scalability, and reliability principles.
  • Experience in fintech / payment systems / banking / high-volume transaction systems (strong plus).
  • Ability to work with or maintain legacy systems (Perl exposure is a plus, but not required).
  • Strong ownership mindset with ability to drive technical direction independently.

Benefits

Comp & perks
  • Grow with Us: Annual Learning Budget for professional development (eligible after probation)—because your growth is our growth.
  • Celebrate Together: We bring colleagues from all offices together for unforgettable company celebrations.
  • Global Collaboration & Events: Opportunities to participate in international company events and initiatives, connecting with colleagues from all regions and contributing to a truly global community

ATS Keywords

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Hard Skills & Tools
PythonmicroservicesFastAPIDjangoAPI designDockerCI/CDsystem designscalabilityreliability
Soft Skills
ownership mindsettechnical directioncollaborationleadershipcode reviews