Senior Software Engineer, Back-end .NET (Payments/CID)

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.

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, WATA, Card Ladder, and the Long Beach Expo collectibles trade show. Since our founding in 1986, we have graded and authenticated millions of items. We employ more than 1,700 people across our headquarters in Santa Ana and offices in Jersey City, Seattle, Hong Kong, Paris, Shanghai, and Tokyo.

Click here to learn more about our Mexico Engineering Team Expansion.

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 a Senior Software Engineer to join our Payments and CID team, where you’ll design and build high-quality, secure, and performant payment and authentication services that will be used across the organizations. Your work will be vital in enabling product teams to deliver innovative, value-added experiences for our collector community while maintaining the highest standards of financial integrity and user trust.

What You’ll Do:

• Participate across the entire software development lifecycle, taking features from concept to production release

• Communicate with Product and other stakeholders to develop business requirements

• 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

Who You Are:

• 5+ years of software engineering industry experience building backend software, with exposure to microservices, event-driven architectures, and REST APIs.

• 3+ years experience with C# and .NET Core framework, and not afraid to take on other new technologies

• Experience with relational as well as NoSQL databases such as Postgresql, DynamoDB

• 3+ years of experience with AWS cloud services such as Lambda, RDS, DynamoDB, MSK, S3, SNS, SQS as well as infrastructure tools (e.g., Terraform, Docker)

• Experience with messaging platforms like Kafka, enabling real-time communication and event-driven architectures.

• Experience with implementing a complete payment process, from the front-end checkout (e.g., Stripe.js), webhooks processing to the back-end API logic.

• Experience with AI-powered developer tools such as Augment, GitHub Copilot and Claude (Anthropic) to improve productivity and code quality

• Solid understanding of object-oriented programming, algorithms, data structures, design patterns and best practices.

• Ability to create and configure automated build, test, and deployment processes for .NET projects using various CI/CD tools.

• Possess strong technical, analytical, troubleshooting, and communication skills with the ability to visualize and document processes.

• Exposure to Test Automation tools and practices (data contract validation, performance testing, Karate, etc).

• Understanding of how to create modular and extensible APIs

• Proficient at using appropriate security, documentation, and/or monitoring best practices

• Familiar with Agile/Scrum methodologies

What we Offer 

• The opportunity to be a part of our inaugural Guadalajara, Mexico office, and to make a real impact on the launch and success of this team 

• A dynamic and collaborative international engineering team

• An organization dedicated to supporting the passionate Collectors community 

• A Competitive Salary and benefits 

Candidates must be authorized to work in Mexico.

Location:

We are open to considering remote candidates that are living within Mexico. You can also work out of our Guadalajara, Jalisco office.

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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 [email protected].

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 [email protected].

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