Senior Software Engineer, Full-Stack (Power Packs)

Collectors; California (MO); On-site; USD 140,971 - 228,870; Full time

Benefits offered by this job

Health Insurance

Fertility benefits

Employee commuter benefits

Educational assistance

401(k) Matching

Flexible hours

Vacation & holidays

Employee discounts

Team events

Job summary

Collectors is seeking a Senior Fullstack Engineer to help build scalable marketplace experiences across our platform.

You’ll primarily strengthen backend systems while owning meaningful frontend work to deliver polished end-to-end product experiences.

Qualifications

• 5+ years of software engineering experience building production applications with backend focus and frontend delivery.
• 3+ years experience with Java and Spring Boot.

Responsibilities

• Participate across the full software development lifecycle, from concept to production release.
• Build backend services, APIs, and data models for customer-facing experiences and internal workflows.
• Contribute to frontend development using Javascript, Typescript, React, and NextJS.
• Collaborate with Product, Engineering and partner teams to translate requirements into clean designs.
• Troubleshoot data, integration, service, and UI issues in a large distributed codebase.
• Contribute to technical documentation to improve maintainability and velocity.
• Raise bar on system design, code quality, observability, and engineering practices.
• Leverage AI tooling (Claude) to accelerate design and implementation with strong engineering judgment.

Skills

Software engineering

Java / Spring Boot

Frontend: React/NextJS

Databases: PostgreSQL & DynamoDB

APIs & integrations

Docker & Kubernetes

Agile / Scrum

AI tooling (Claude)

Education

Bachelor's degree in CS or related field

Tools

Docker

Kubernetes

AWS

PostgreSQL

DynamoDB

Job description

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 3,000 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

• 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

#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 [e-mail].

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 [e-mail].

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.