Senior Software Engineer, Full-Stack (PSA Liquidity Platform)
Core
Building the PSA Liquidity Platform to connect supply and demand across a marketplace for collectibles, including instant offers and eBay consignment.
Role type
Senior Full-Stack Software Engineer (Marketplace)
Builds
Buyer tooling, matching engine, microservices, and distributed event-driven systems for the PSA Liquidity Platform.
Domain
Consumer marketplace / Collectibles / Fintech
Deliverable
production ML models | product features
Required skills
Java (Spring Boot), React, Svelte, Microservices architecture, Kafka, Kubernetes, AWS, Observability (Datadog/New Relic/OpenTelemetry), AI tooling in SDLC
Preferred skills
Experience scaling products 0-to-1, AI-first engineering mindset, Systems thinking
Technologies
Java, Spring Boot, React, Svelte, Kafka, Kubernetes, AWS, Datadog, New Relic, OpenTelemetry
Responsibilities
Lead development of next-generation buyer platform; Build and optimize real-time targeting and ranking engine; Design and operate distributed event-driven systems; Elevate seller experience; Use AI tooling across the development lifecycle; Own outcomes end-to-end from concept to production; Drive cross-functional execution; Connect ecosystem liquidity handoffs.
Seniority
Senior, hands-on IC