Senior Software Engineer – Payments

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

📋 Description

• Design, develop, and manage payment-related services, which encompass gateway integrations and processes for payment intent, authorization, capture, and refund flows.

• Create payout orchestration and reconciliation functionalities.

• Implement marketplace features such as onboarding/KYC integration, merchant setup, settlement instructions, deductions, and alignment of invoicing/merchant statements.

• Develop flow-of-funds primitives, including idempotency, ledgers/events, and audit trails.

• Integrate with payment service providers and partner tools.

• Establish workflows for handling disputes, chargebacks, and fraud.

• Collaborate with Operations on creating runbooks and defining escalation paths.

• Work alongside Product, Legal/Compliance, Finance, and Support teams to convert requirements into secure, testable production behavior.

• Enhance engineering quality through automated testing, safe rollouts/canary releases, observability, and improvements in incident response.

• Mentor fellow engineers, lead design reviews, and contribute to the development of shared standards and documentation.

⛳️ Requirements

• Robust backend engineering experience in distributed systems, including microservices, asynchronous processing, resilient APIs, and eventual consistency.

• Hands-on experience with payment processes, covering authorization, capture, refund, webhooks, and reconciliation.

• Understanding of payment correctness patterns, such as idempotency keys, double-entry thinking, and auditability.

• Knowledge in security aspects, including PCI compliance, PII protection, secrets management, least privilege principles, and secure coding practices.

• Familiarity with working in an Azure-first environment utilizing APIs, queues/eventing, and monitoring tools.

• Strong practices in CI/CD and automated testing.

• Ability to communicate clearly and confidently with non-technical stakeholders in high-pressure situations.

• Experience with sub-merchant, marketplace, or Payfac-like operating models is highly preferred.

• Preference for familiarity with dispute tools, card scheme regulations, 3DS/risk rules, or fraud platforms.

🏝️ Benefits

• High ownership and autonomy over the services you develop.

• Chance to work on revenue-critical production systems.

• Strong emphasis on security, reliability, and engineering best practices.

• Collaborative, international engineering team.

• Opportunities for learning, mentoring, and personal growth.

• Quarterly team gatherings at one of our global offices.

• Flexible remote work arrangement.