Senior Software Engineer – Payments

This is a fully remote position, open to applicants in Germany.

📋 Description

• Take responsibility for enhancing OrderYOYO's payment capabilities — facilitating KYC onboarding, deductions, settlement/payout timing, dispute processes, and merchant invoicing — while elevating reliability, security, and engineering quality in one of our most vital business domains.

• Design, develop, and manage payment-domain services, encompassing gateway integrations and payment intent/authorization/capture/refund flows, payout orchestration, and reconciliation.

• Implement marketplace functionalities where applicable: onboarding/KYC integration, merchant configuration, settlement instructions, deductions, and alignment of invoicing/merchant statements.

• Construct robust “flow-of-funds” primitives — including idempotency, ledgers/events, and audit trails — that are fully supportable for finance and compliance.

• Integrate with PSP and partner tools, paying close attention to tri-party/sub-merchant implications where relevant.

• Establish dispute/chargeback and fraud-handling touchpoints across internal workflows and PSP tools, collaborating with Ops on runbooks and escalation procedures.

• Collaborate closely with Product, Legal/Compliance, Finance, and Support teams to translate requirements into safe, testable production behaviors.

• Enhance engineering quality in a dynamic domain through automated testing, safe rollouts/canaries, observability, and incident-response improvements — while mentoring engineers, leading design reviews, and contributing to shared standards and documentation.

⛳️ Requirements

• Strong backend engineering expertise in distributed systems — including microservices, asynchronous processing, resilient APIs, and eventual consistency.

• Hands-on experience with payment flows (auth/capture/refund, webhooks, reconciliation) and “money correctness” patterns such as idempotency keys, double-entry thinking, and auditability.

• A solid security mindset encompassing PCI compliance, PII protection, secrets management, least privilege, and secure coding practices.

• Comfort in an Azure-first environment (APIs, queues/eventing, monitoring), along with strong CI/CD and automated testing methodologies.

• The ability to communicate clearly and confidently with non-technical stakeholders in high-stakes situations — such as incidents, financial discrepancies, and compliance inquiries.

🏝️ Benefits

• Competitive salary

• A remote role — work from wherever you perform at your best, with quarterly in-person gatherings at one of our global offices.

• High ownership and autonomy.

• Clear progression toward Tech Lead / Staff Engineer responsibilities.

• The opportunity to work on revenue-critical production systems.

• A strong emphasis on security, reliability, and engineering best practices.

• A collaborative, international engineering team.

• A genuine focus on learning, mentoring, and long-term growth.