Senior Backend Software Engineer

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Description

The role is about: The Gateway Related Projects team is committed to designing, developing, and implementing payment solutions that guarantee stable and consistent payment processing. Our goal is to create successful products and establish a reputation as a dependable partner for our clients. In this role, you will work in a fast-paced environment where system performance, scalability, and 99.9% reliability are critical to our core transaction flow. Location: Remote from Poland (Contractor arrangement) Reporting to: Technical Lead What you will do Dual-Track Engineering: Support and extend the existing Perl-based payment gateway while simultaneously designing and building high-performance microservices in Python. System Modernization: Architect and implement scalable, distributed Python services to replace legacy components, ensuring reliability under high-load production environments. High-Stakes Integrations: Integrate and manage complex third-party APIs and external payment services, ensuring seamless transaction flows and robust error handling. Technical Leadership: Lead code reviews, drive engineering best practices, and identify system bottlenecks to continuously improve performance and scalability. Architecture & Deployment: Collaborate with DevOps to improve CI/CD pipelines (GitLab) and architect solutions using AWS services (Lambda, ECS, etc.). Product-Focused Delivery: Go beyond the "how" of the code—bring a product mindset to understand the business logic, user im

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