Senior Software Engineer, Full-Stack (Power Packs)

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 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 The Power Packs engineering team is responsible for building and operating the customer-facing Power Packs experience, the backend services and internal tools that power pack configuration and purchases, and the integrations with adjacent collection systems that support the full pack lifecycle. We are looking for a Senior Fullstack Engineer who can help build and evolve the systems that power flexible, scalable marketplace experiences across our platform. This role is especially well-suited for an engineer who is strongest on the backend, but also comfortable owning meaningful frontend work to deliver polished end-to-end product experiences. Your work will directly shape how we build APIs and services, connect them to modern web applications, and support new product capabilities such as white-label experiences and new collectible categories. 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 You’ll Do Participate across the entire software development lifecycle, taking features from concept to production release Build backend services, APIs, and data models that support customer-facing product experiences and internal operational workflows Contribute to frontend application development using Javascript, Typescript, React, and NextJS to deliver seamless end-to-end experiences Collaborate with Product, Engineering, and partner teams to translate business requirements into clean technical designs across both backend and frontend systems Troubleshoot data, integration, service, and UI issues across a large distributed codebase Contribute to technical documentation to improve maintainability, knowledge sharing, and team velocity Help raise the bar on system design, code quality, observability, and engineering best practices across the team Leverage AI tooling, with a preference for Claude, to accelerate software design, architecture, and implementation while maintaining strong engineering judgment and code quality Who You Are 5+ years of software engineering experience building production applications, with substantial experience in backend systems and meaningful experience delivering frontend product work 3+ years experience / strong proficiency in Java and the Spring Boot framework Strong fundamentals working with databases and data modeling, both relational (e.g. PostgreSQL) and NoSQL (e.g. DynamoDB) Experience designing and building APIs and service integrations that support scalable product development 3+ years experience with modern frontend development using Javascript, Typescript, React, and NextJS Experience with containerization and orchestration infrastructure (e.g. Docker, Kubernetes, ECS) Experience collaborating with Engineering and Product teams to turn complex business requirements into clean, extensible systems and user experiences Possess strong technical, analytical, troubleshooting, and communication skills with the ability to visualize and document processes Proficient at using appropriate security, documentation, testing, and monitoring best practices Familiar with Agile/Scrum methodologies Comfortable using AI tooling, preferably Claude, to support solution design, system architecture, and software implementation in day-to-day engineering work Nice to Have Experience supporting white-label or multi-tenant product architectures Experience with distributed messaging systems such as Apache Kafka Experience with Python as well as test frameworks such as pytest or unittest Experience building applications in the cloud with AWS and familiarity with serverless infrastructure such as AWS Lambda Experience contributing to shared design systems Experience with Svelte and SvelteKit Experience with streaming services such as Twitch Experience working across both customer-facing applications and internal tools Salary Range:   The salary range for this position is $140,971-$228,870 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:   Hea