Senior Software Engineer, Payments

OrderYOYO

Senior Full Stack Engineer evolving payments capabilities across online and in-store for OrderYOYO. Designing and implementing services to improve payment flows and capabilities.

Posted 6/4/2026full-timeBerlin • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

AzureDistributed SystemsMicroservices

About the role

Key responsibilities & impact

Own and evolve OrderYOYO’s payments capabilities across online + in-store (POS, Kiosk & Payment terminals).
Support the transition to a more scalable operating model.
Enable capabilities like KYC onboarding, deductions, settlement/payout timing, dispute flows, and merchant invoicing.
Design, build and operate payment-domain services (gateway integrations, payment intent/authorisation/capture/refund flows, payout orchestration, reconciliation).
Implement marketplace capabilities where relevant: onboarding/KYC integration and merchant configuration.
Build robust “flow-of-funds” primitives: idempotency, ledgers/events, audit trails, and supportability for finance/compliance.

Requirements

What you’ll need

Strong backend engineering background in distributed systems (microservices, async processing, resilient APIs, eventual consistency).
Production experience with payment flows (auth/capture/refund, webhooks, reconciliation) and “money correctness” patterns (idempotency keys, double-entry thinking, auditability).
Solid security mindset: PCI, protecting PII, secrets management, least privilege, secure coding.
Comfortable in an Azure-first environment (APIs, queues/eventing, monitoring), and with CI/CD + automated testing practices.
Clear communication with non-technical stakeholders in high-stakes scenarios (incidents, financial breaks, compliance asks).

Benefits

Comp & perks

Competitive salary
High ownership and autonomy
Clear progression toward Tech Lead / Staff Engineer responsibilities
Opportunity to work on revenue-critical production systems
Strong focus on security, reliability, and engineering best practices
Collaborative, international engineering team
Emphasis on learning, mentoring, and long-term growth

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

backend engineeringdistributed systemsmicroservicesasynchronous processingresilient APIspayment flowsKYC onboardingidempotencysecure codingautomated testing

Soft Skills

clear communicationstakeholder managementproblem-solvingcollaborationadaptability

Certifications

PCI compliance