Senior Backend Python Engineer (APM Gateway) at payabl

Department: IT

Language

Setup: Remote - Portugal
Type: Full-time, Contract
Level: senior
Posted: Sep 17, 2026

Description

The Gateway Backend Engineer will support and extend a Perl-based payment gateway while designing and building high-performance Python microservices. The role involves modernizing legacy systems, integrating third-party payment APIs, improving CI/CD and AWS infrastructure, troubleshooting production issues, and mentoring engineers. It is a contractor arrangement remote from Portugal or Poland and requires 5+ years of backend engineering experience, strong Python expertise, distributed-systems knowledge, API reliability skills, and cloud and containerization experience.

Required Skills

Python
FastAPI
AsyncIO
Distributed Systems
API Integration
Docker
AWS
Event-Driven Architecture
Kafka
RabbitMQ
Perl

Additional Information

Required Previous Experiences: 5+ years of backend engineering experience
Experience building and scaling microservices architectures and high-throughput systems
Experience integrating third-party APIs and managing webhooks, callbacks, idempotency, and retry policies
Experience with Docker containerization and AWS cloud infrastructure
Preferred Qualifications: FastAPI and AsyncIO
Perl experience
Event-driven architecture and messaging systems
Translation Company Name: payabl.