Senior Software Engineer, Back-End (Payments)
Core
Building, scaling, and evolving the payments infrastructure powering every transaction across the Collectors ecosystem, including grading orders, vault transactions, and partner payouts.
Role type
Senior IC backend engineer (payments)
Builds
Payment APIs, web application experiences, and multi-gateway integrations for a global collectibles marketplace.
Domain
Fintech / Payments / Collectibles
Deliverable
production ML models | product features | infrastructure
Required skills
C# (.NET), React, Svelte, TypeScript, PostgreSQL, DynamoDB, AWS, Kubernetes, Kafka, Stripe, PayPal, PCI-DSS compliance, distributed systems architecture, observability (Datadog)
Preferred skills
AI-assisted development, fintech domain expertise, security-first mindset, influential communication
Technologies
C#, .NET, React, Svelte, TypeScript, PostgreSQL, DynamoDB, AWS, Kubernetes, Kafka, Stripe, PayPal, Datadog
Responsibilities
Design and maintain multi-gateway payment integrations (Stripe, PayPal); develop backend services and frontend payment experiences; implement security and compliance controls (PCI-DSS, tokenization); architect distributed event-driven services; drive cross-functional execution for payment flows.
Seniority
Senior, hands-on IC