Sr Software Engineer, Identity & Access Management (IAM

Are you obsessed with data, partner success, taking action, and changing the game? If you have a whole lot of hustle and a touch of nerd, come work with Pattern! We want you to use your skills to push one of the fastest-growing companies headquartered in the US to the top of the list.

Pattern accelerates brands on global ecommerce marketplaces leveraging proprietary technology and AI. Utilizing more than 66 trillion data points, sophisticated machine learning and AI models, Pattern optimizes and automates all levers of ecommerce growth for global brands, including advertising, content management, logistics and fulfillment, pricing, forecasting and customer service. Hundreds of global brands depend on Pattern’s ecommerce acceleration platform every day to drive profitable revenue growth across 60+ global marketplaces—including Amazon, , , eBay, Tmall, Tik Tok Shop, JD, and Mercado Libre.

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Pattern has been named one of the fastest growing tech companies headquartered in North America by Deloitte and one of best-led companies by Inc. We place employee experience at the center of our business model and have been recognized as one of Newsweek’s Global Most Loved Workplaces®.

As a Sr Software Engineer
, you will lead and oversee the software engineering function for Pattern’s central administrative, authentication, authorization, and security infrastructure. In this role, you will serve as a key technical leader for our mission-critical identity and access platform, partnering with other engineering leaders and cross-functional teams to ensure its success. Because this core system underpins all of Pattern's operations, you will partner closely with a wide variety of cross-functional teams to field, prioritize, and build a high volume of feature requests while ensuring the ongoing maintenance, stability, and high performance of existing applications.

• Maintain, scale, and optimize existing central authentication and authorization applications.

• Triage, scope, and build incoming feature requests from cross-functional teams across Pattern.

• Write, test, and deploy clean back-end code using Ruby and Go.

• Design and enforce fine-grained RBAC across internal platforms and external APIs.

• Collaborate with engineers and product stakeholders to integrate core security services.

• Automate admin workflows and integrate AI solutions to enhance operational efficiency.

• Monitor performance, reduce technical debt, and ensure high system availability.

• 3+ years of back-end software engineering experience focused on core security, identity, or platform systems.

• Proven experience building and maintaining central Authentication and Authorization systems.

• Direct experience with RBAC/ABAC frameworks and security protocols (OAuth 2.0, OIDC, SAML, JWT).

• Strong capability to manage competing feature requests from multiple internal teams while maintaining legacy codebases.

• Solid background with relational databases (PostgreSQL) and REST/gRPC APIs.

• You are seen and trusted as a primary subject matter expert and partner for central Auth/Authz and admin tooling across all of Pattern.

• You strike an effective balance between rapidly delivering requested features for partner teams and systematically maintaining/refactoring existing applications to ensure system stability and reliability while preventing technical debt.

• You communicate proactively with cross-functional stakeholders, setting realistic timelines and clear integration pathways for their feature requests.

• You ensure our central Auth system is fault-tolerant, sub-millisecond in performance, and seamlessly adopted by all internal applications and external platforms.

• You effectively delegate and monitor repeatable, task-focused feature and maintenance work with junior engineers, optimizing your time across both strategy and execution.

You will partner with Engineering Leadership and collaborate with engineers across our global organization. The team follows a hybrid work schedule:
Monday, Wednesday,…