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payabl.

Senior Backend Engineer, Python – Core Gateway

payabl.

Senior Backend Developer supporting Perl-based payment gateway and developing Python microservices for a financial services company. Collaborating with cross-functional teams to enhance system performance and scalability.

Posted 6/22/2026contractRemote • 🇵🇹 PortugalSeniorWebsite

Tech Stack

Tools & technologies
AWSCloudDockerKafkaPerlPython

About the role

Key responsibilities & impact
  • Support and extend the existing Perl-based payment gateway debugging production issues and adding features during migration
  • Design, develop, and maintain modern server-side components in Python, ensuring high performance and scalability
  • Integrate third-party APIs and external payment services into legacy and modern platform layers
  • Maintain clean communication to effectively collaborate with multiple stakeholders in agile sprints
  • Understand the business logic and user impact of what you build
  • Participate in code reviews and contribute to a culture of continuous improvement
  • Work closely with DevOps on CI/CD pipelines, containerization, and cloud deployments.

Requirements

What you’ll need
  • 5+ years of backend engineering experience with strong Python mastery (AsyncIO and FastAPI preferred)
  • Experience with Perl (or a genuine eagerness to learn and work within Perl production code)
  • Solid experience integrating third-party APIs and a deep understanding of webhooks, callbacks, and retry policies.
  • Experience with CI/CD pipelines (GitLab preferred), Docker containerization, and familiarity with AWS (Lambda, cloud services)
  • Exposure to event-driven architectures (Kafka, message queues, etc.)
  • Advocate for clean code and deep engineering logic.
  • Strong English communication skills—both written and verbal

Benefits

Comp & perks
  • Annual Learning Budget for professional development (eligible after probation)
  • Company celebrations
  • Opportunities for international collaboration and events

ATS Keywords

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Hard Skills & Tools
PythonPerlAsyncIOFastAPIAPI integrationCI/CD pipelinesDockerAWSevent-driven architectureclean code
Soft Skills
communicationcollaborationcontinuous improvementbusiness logic understandingstakeholder engagement