Senior Backend Developer – Services

🕒 June 22

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payabl.

WebsiteLinkedInAll Job Openings

51 - 200 employees

💳 Fintech

🤝 B2B

💸 Finance

Fintech • B2B • Finance

payabl. is a fintech company that offers game-changing financial solutions designed to help businesses expand globally. Specializing in a wide range of payment products, payabl. provides services such as card acquiring, banking services, local payment methods, and POS terminals. Their easy-to-integrate payment technology includes features like smart fraud prevention and dedicated customer support, allowing businesses to process local and international payments with ease. Supported by industry experts, payabl. offers over 300 payment methods and cutting-edge fraud protection using AI and machine learning. The company is renowned for its commitment to transparency, real-time bespoke reporting, and personalized customer relationships.

📋 Description

• Legacy Modernisation: Read legacy code (PHP, Perl, or JavaScript), extract the business logic, and reimplement it correctly within a modern microservices architecture. • Reliability First: Ensure idempotency, data integrity, and graceful error handling across all services — "almost working" is never good enough. • Greenfield & Refactoring: Split your time between building new features from scratch and refactoring existing legacy modules into clean, maintainable code. • API Engineering: Design and consume external APIs with a deep understanding of webhooks, callbacks, and complex retry policies. • 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 end-user impact of what you build. • Infrastructure Contribution: Contribute to CI/CD pipelines, Docker, or Kubernetes infrastructure where relevant. If you have a passion for infra, you are more than welcome to bring it. • Innovation: Propose and advocate for tools or technologies that can demonstrably improve our performance, security, or development speed.

🎯 Requirements

• Python Mastery: 5+ years of backend engineering experience with strong Python expertise. Deep AsyncIO proficiency — you must be comfortable building non-blocking, high-reliability microservices. • Framework Expertise: Production-grade experience with FastAPI (not just familiarity). • Databases: Experience with MySQL and/or PostgreSQL — query design, schema understanding, and migration strategies. • Testing Discipline: Experience writing unit and integration tests (pytest preferred). • API & Reliability Patterns: Expertise in designing and consuming external APIs with a deep understanding of webhooks, callbacks, and complex retry policies. • Ownership Mindset: Willingness to take full ownership of high-traffic, always-up applications and operate independently within an established architectural vision. • Confidence in Complex Systems: Comfortable in complex distributed environments where reliability is non-negotiable. • Clean & Intentional Code: We value deep engineering logic over AI-generated snippets. You must be able to explain the reasoning behind every line you ship. • Curiosity for Product: You care about the "why" behind a feature — how it works for the end-user and what it means for the business. • Strong English: Both written and verbal to collaborate effectively across multi-functional teams. • Nice to Have: Experience with PHP, Perl, or JavaScript — a strong bonus signal for legacy comprehension. • Kafka / Redis experience. • Docker / CI/CD / Kubernetes familiarity. • Financial industry exposure — fintech, payments, 3DS, Token Management Systems, or payment gateway integrations. • Track record of successfully migrating systems from one language or paradigm to another.

🏖️ Benefits

• 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