Software Engineer - Java Back-End; Marketplace

Staff Software Engineer - Java Back-End (Marketplace)

Collectors is the leading creator of innovative technology that provides value-added services for collectors worldwide. We grade, authenticate, vault, and sell millions of record‑setting collectibles, all while modernizing and digitalizing the process to further our mission of helping collectors pursue their passions. We’re always on the lookout for talented people to join our growing team.

Our services span collectible coins, trading cards, Funko Pops!, video games, event tickets, autographs, and memorabilia. Our subsidiaries include PSA, PCGS, SGC, and Card Ladder. Since our founding in 1986, we have graded and authenticated millions of items. We employ more than 1,900 people across our headquarters in Santa Ana and offices in Jersey City, Tokyo, Shanghai, Hong Kong, Toronto, Guadalajara, Dallas, and Paris.

We’re transforming the collecting experience with technology that brings authentication, grading, and trading into the modern era. Our products are equalizing the playing field by providing tools that make complex research analytics — including pricing, scarcity reports, and historic sales data — accessible to every collector, old or new. Our engineering mission is to democratize technology while promoting innovation, collaboration, and continuous learning throughout the organization.

We're seeking engineers to utilize advanced technology in agile settings, with a focus on improving the customer experience for every collector.

We are looking for backend software engineers who can build flexible and scalable backend architectures that can support a wide range of experiences for collectors who are trying to research, grade, and sell their collectibles. Your work will directly help improve collectors' enjoyment of the hobby and make it easier for new users to get started with the services that we offer.

This team is responsible for building modern cloud‑based applications and APIs and user‑facing web and mobile applications to help users manage and monetize their collections. As a member of this team, your day‑to‑day work will be focused on building out the backend services and processes that support high‑profile features including the eBay Marketplace, PSA Offers, and the customer‑facing portal to the PSA Vault.

You’ll report to a Software Engineering Manager and work from any of our US offices. Remote or hybrid candidates will also be considered. We believe that there is significant value in in‑person collaboration. If you live within a 1 hour commuting distance to one of our offices, you will be required to be onsite most of the time. This will be discussed further as part of the recruiting process.

• Contribute to the design and development of new cloud‑based software architectures
• Own and deliver complete features, including design, architecture, implementation, testability and deployment
• Provide feedback pertaining to technical designs, proposals and code
• Analyze existing applications / databases and identify areas for improvement
• Design and contribute to APIs that can support user experiences on web and mobile applications
• Participate across the entire software development lifecycle, taking features from concept to production release
• Collaboratively create solutions with other teams
• Troubleshoot software issues and debug a large codebase
• Develop and execute unit and integration tests
• Contribute to technical documentation to increase maintainability of software assets

• 7+ years of software engineering industry experience building backend software, with exposure to microservices, event‑driven architectures, and batch processing.
• 4+ years experience / strong proficiency in Java and the Spring Boot framework
• Strong fundamentals working with databases and data modeling, both relational (e.g. Postgre
  
  SQL) & No
  
  SQL (e.g. Dynamo
  
  DB)
• Experience with building applications in the cloud with AWS and experience with serverless infrastructure such as AWS Lambda
• Experience with containerization and orchestration infrastructure (e.g. Docker, Kubernetes, ECS)
• Experience with distributed messaging systems such as Apache Kafka
• Experience…