Senior Software Engineer, Full-Stack (PSA Liquidity Platform)

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. Were always on the lookout for talented people to join our growing team.

Our services span collectible trading cards autographs comic books coins video games event tickets and memorabilia. Our subsidiaries include PSA PCGS Beckett SGC and Card Ladder.

Since our founding in 1986 we have graded and authenticated millions of items. We employ more than 3000 people across our headquarters in Santa Ana California and offices in New Jersey Texas Florida Japan Shanghai Hong Kong Canada Mexico Germany and France.

As part of our interview process we request that candidates have their cameras on during video interviews. This helps foster meaningful conversation and allows us to create an experience that closely resembles our standard working environment. Certain interview steps may take place by phone. For remote roles and at our discretion candidates may be asked to participate in an on-site interview as part of the final stages of the process.

We understand there may be occasional circumstances requiring accommodation and are happy to discuss them as needed. Your recruiter will be able to clarify expectations and answer any questions you have.

About the Role

We are looking for a Senior Software Engineer to build the PSA Liquidity Platform the product suite that connects supply and demand across our marketplace including PSA Partner Offers and our eBay Consignment platform.

PSA Partner Offers is a first-party marketplace that sources offers from our network of buyers and surfaces them as instant targeted offers to grading and vault customers. Our eBay consignment business allows customers to seamlessly sell on the worlds largest marketplace while we handle every step of fulfillment as eBays official vault partner.

Youll own the technical design and delivery of the end-to-end buyer and seller experiences partnering with a dedicated cross-functional team (business product engineering design data) to seamlessly connect supply and demand. This is a high-visibility high-impact role on our Marketplace engineering team building systems that maximize GMV conversion and offer-to-sale velocity at scale.

We believe there is significant value in onsite partnership and team collaboration and candidates within 1-hour commuting distance of the office may be expected to work onsite most of the time. Additional details will be discussed during the recruiting process.

What Youll Do

• Build powerful buyer tooling. Lead development of our next-generation buyer platform: targeting campaign management budget controls and analytics that let every type of buyer from individual collectors to large-scale dealers discover and acquire the right cards at scale.

• Build and optimize the matching engine. Partner with Engineering and AI/ML to build a sophisticated real-time targeting and ranking engine that maximizes GMV conversion and offer-to-sale velocity across channels.

• Architect for scale. Design and operate microservices and distributed event-driven systems that power instant accurate offers across millions of collectibles with the low latency and reliability our customers expect. Youll make pragmatic high-conviction architecture calls and own the quality of what you ship across the full stack.

• Elevate the seller experience. Make it effortless for sellers to understand their options price their items accurately and complete a sale with minimal friction.

• Take an AI-first approach to building. Use AI tooling across the development lifecycle to move faster and raise quality and bring a strong point of view on how AI changes the way we design build and operate software.

• Own outcomes end-to-end. Take projects from 0 to 1 from an ambiguous problem to a shipped instrumented production product and wear whatever hat the moment requires whether thats frontend backend infrastructure or data.

• Drive cross-functional execution. Translate strategy into clear technical plans specs and user stories. Coordinate delivery across dedicated and partner engineering teams and keep stakeholders aligned and projects moving.

• Connect the ecosystem. Ensure seamless liquidity handoffs across the broader PSA enterprise from Grading to Collection Management to Vaulting reducing friction and resolving cross-system dependencies that span payments logistics and risk.

• Communicate with clarity at every level. From executive reviews to engineering standups synthesize complexity articulate tradeoffs and bring people with you clearly in writing and in person.

Who You Are

• 6 years engineering experience. You have a track record of designing shipping and scaling products 0-to-1 that have measurable business impact. Ideally 2 years operating as a Senior IC or equivalent technical leadership level at a high-growth company or a scaled consumer platform.

• Full-stack range. You have strong proficiency in Java (Spring Boot) and equally comfortable in modern frontend frameworks like React and Svelte moving fluidly across the stack.

• Distributed-systems depth. Youve designed and operated microservices and Kafka-based event-driven architectures run workloads on Kubernetes and know your way around the AWS ecosystem.

• Observability-first mindset. You instrument what you ship using tools such as Datadog New Relic or OpenTelemetry. Youre comfortable building dashboards setting up monitoring/alerting and using distributed tracing to debug production issues.

• AI-first engineer. You build with AI tooling across the SDLC - from planning and code generation to review and debugging. You lean on your experience to make high-conviction calls quickly.

• Systems thinker and customer focused. You naturally decompose complex multi-service systems into clean boundaries and intuitive interfaces without losing sight of the customer experience.

• Influential communicator. A strong written and verbal communicator who aligns engineers product partners and stakeholders without direct authority makes crisp calls and brings people with you.

• Bias for ownership. You have an extreme ownership mindset and will wear any hat required to get the job done. You thrive in a fast-moving self-directed environment you set the bar hold it and take full accountability for outcomes.

• Passion for collecting is a plus.

Salary Range:

The salary range for this position is $140971-$228870 Actual compensation on this range varies based on a variety of non-discriminatory factors including location job level experience and skill set. This role may be eligible for bonuses commissions or other forms of compensation please ask your recruiter for details.

Reasons To Join Us:

• Health Insurance: All full-time employees are eligible to enroll in Medical Dental and Vision

• Additional Benefits: Full-time employees are eligible for fertility commuter and educational assistance benefits

• 401(K) Matching Plan: We are proud to offer a competitive 401k matching plan to our employees to support their future financial goals

• Vacation: All salaried employees are eligible for flexible time-off

• Holiday Pay: All regular full-time employees are eligible for ten company paid holidays

• Employee Discounts: Employees receive discounts on select grading services for approved submissions

• Flexible Hours: Many of our teams offer flexible schedules with varying shifts and will work with you to accommodate your needs

• Fun Working Environment: Our team members are invited to participate in celebrations holiday events and team building activities

#LI-Remote

#BI-Hybrid
#BI-Remote

Collectors uses e-Verify to validate your ability to work legally in the United States.

We are aware that there are instances where individuals are receiving job offers that fraudulently allege to be from Collectors or one of our business units. This type of fraud can be carried out through false websites through fake e-mails claiming to be from the company or through social media. We never ask for personal information such as your bank account Social Security numbers or National IDs nor do we send or request payments for the purchase of business-related equipment. If you suspect fraud please reach out to

We are committed to equal employment opportunity regardless of race color ethnicity ancestry religion national origin gender sex gender identity or expression sexual orientation age citizenship marital or parental status disability veteran status or other class protected by applicable law. We believe that a team that represents a variety of backgrounds perspectives and skills will better service the diverse community of collectors we support.

If you require an accommodation to apply or interview with us due to a disability or special need please email .

U.S. residents: for disclosures relating to personal information we collect during the employment application and recruitment process please see our Privacy Notice for U.S. Applicants.

If you are based in California you can read information for California residents here.