Senior Backend Python Engineer (Core Gateway)

Overview

We are expanding our engineering capabilities and looking for a Senior Backend Developer to join our Core Gateway team. This is a unique, dual-track role where you will play a central part in both the present and future of our infrastructure. You will support, maintain, and extend our existing Perl-based payment gateway ensuring stability and high performance in a live financial production environment while simultaneously leading the architecting and building of our next-generation Python microservices platform. 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.

Responsibilities

• Dual-Track Maintenance: Support and extend the existing Perl-based payment gateway debugging production issues and adding features while the migration is ongoing
• Modernization: Design, develop, and maintain modern server-side components in Python, ensuring high performance and scalability
• Integrations: Integrate third-party APIs and external payment services into both legacy and modern platform layers
• Agile Collaboration: Maintain clean and strong English communication to effectively collaborate with multiple stakeholders across departments working in agile sprints
• Product Thinking: Go beyond the "what" and "how" of the code bring a product-focused mindset to understand the business logic and user impact of what you build
• Engineering Standards: Participate in code reviews, uphold high code quality standards, and contribute to a culture of continuous improvement
• Infrastructure: Work closely with DevOps on CI/CD pipelines, containerization, and cloud deployments

Requirements

• Python Expertise: 5+ years of backend engineering experience with strong Python mastery (AsyncIO and FastAPI preferred)
• Legacy Flexibility: Experience with Perl (or a genuine eagerness to learn and work within Perl production code). We value polyglot engineers who can read and refactor legacy code
• API Mastery: Solid experience integrating third-party APIs and a deep understanding of webhooks, callbacks, and retry policies
• Tech Stack: Experience with CI/CD pipelines (GitLab preferred), Docker containerization, and familiarity with AWS (Lambda, cloud services)
• Architecture: Exposure to event-driven architectures (Kafka, message queues, etc.)
• Clean & Intentional Code: We value deep engineering logic over AI-generated snippets. You should be a "clean code" advocate who can explain the reasoning behind every line you ship
• Curiosity for Product: You care about the "why" behind a feature. You are interested in how a product works for the end-user and the business
• English Proficiency: Strong English communication skills—both written and verbal—to collaborate across multi-functional teams

Benefits

• Future-Proof Your Finances: Provident Fund after probation
• Grow with Us: Annual Learning Budget for professional development (eligible after probation)
• Wolt Your Way Through Lunch: €150 monthly Wolt allowance
• Stay Active Your Way: SportsBenefits membership
• Drive in Style: Company car after one year (availability and performance permitting)
• Park with Ease: Complimentary parking near the office
• Max Out Your Downtime: 25 days of vacation plus public holidays and 10 days of sick leave
• Shop & Save: Local discounts and event tickets
• Speak Like a Local: Free Greek language classes, twice a week
• Celebrate Together: Company celebrations across offices
• Global Collaboration & Events: Opportunities to participate in international company events

The benefits listed above are for our Cyprus office location only, a list of benefits and contract type will be assessed subject to your location and discussed in the first interview with your Talent Acquisition Partner.

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