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Principal Engineer - DevX & AI

External
xsolla logoXsolla · Montreal, Canada
Full-timeRemote1mo ago
ComplianceDocumentation
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About the role

Xsolla is a global payments and commerce platform for the games industry, used by thousands of publishers to monetize, distribute, and operate their titles worldwide. Shop Builder is Xsolla's storefront platform - used by publishers and game developers to launch and operate game shops, from straightforward catalog and webshops to fully custom storefronts built headless on our backend. For more information, visit xsolla.com. The DevX and AI team owns the public APIs, documentation, and AI features that give developers - and AI agents - the full surface they need to customize and extend Shop Builder. This is a net-new team of seven, standing up to fill a real gap: no dedicated team has owned the developer surface end to end. That changes now.

Requirements

  • 10+ years of professional engineering experience, with a demonstrated track record as a Staff or Principal engineer who has shaped platforms, APIs, or developer tooling used by external builders.
  • Deep expertise in designing and shipping public APIs and SDKs, including versioning strategy, backwards compatibility, and developer ergonomics - strong opinions about what makes an API delightful vs. painful.
  • Expert-level proficiency in JavaScript/TypeScript and React - the primary interface language for LLMs and developers on this platform.
  • Hands-on experience building CLI tooling and local developer workflows (scaffolding, hot reload, file-based config, deploy commands).
  • Solid understanding of the Model Context Protocol (MCP) or equivalent agentic tool-use interfaces, and practical experience building tools that AI agents can reliably invoke.
  • Experience building systems at global scale on cloud infrastructure (AWS or GCP), with deep knowledge of containerization, CI/CD, and infrastructure-as-code.
  • Ability to write and reason about LLM-friendly documentation and API surfaces: you understand that token-efficiency, predictability, and schema clarity matter as much as human readability.
  • Exceptional technical communication: clear RFCs and ADRs, productive architecture reviews, and the ability to explain second-order consequences to engineering and business leadership.
  • Comfort operating in a greenfield context - you define the structure rather than inherit it.

Benefits

Equal Employment Opportunity Statement:We consider qualified applicants with criminal histories in accordance with the Fair Chance Act.Criminal History Consideration:For this role, we will conduct a background check that may include the following:Criminal history checkEmployment verificationEducation verificationRelevance to Job Responsibilities:The background check is relevant to this position because of the following role responsibilities:Accessing confidential company dataEnsuring compliance with regulatory requirementsHandling sensitive financial information/managing budgets/accessing fundsRights Under the Fair Chance Act:Applicants are encouraged to inquire about their rights under the Fair Chance Act. If you have questions regarding our hiring practices, please contact careers@xsolla.com.

Additional Information

ABOUT YOU We are looking for a Principal Engineer to take architectural ownership of the agent-readable Shop Builder platform. This is the most senior individual contributor role on the DevX and AI team, and the decisions you make here - which surfaces to expose, which formats to support, which standards to set - will bind the platform for years. You are not a manager, but your influence is org-wide. You define how developers and AI agents interact with Shop Builder's foundational capabilities: UI as Data, custom blocks, themes, data binding, catalog, payments. You are the technical authority on what the platform exposes and how, and you are deeply hands-on with the hardest parts of that work.

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