> Markdown version of [/jobs/ext/2713821-principal-software-engineer-devx-architecture](https://www.wearedevelopers.com/jobs/ext/2713821-principal-software-engineer-devx-architecture). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer, DevX Architecture - **Company:** CarGurus, Inc. - **Location:** Boston, MA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, User Authentication, Cloud Computing, Code Review, Programming Tools, Node.Js, OAuth, OpenID, Software Engineering, Strategies of Testing, Web Applications, Okta, ReactJS, Spring-boot, Reliability of Systems, Kubernetes, Information Technology, Terraform - **Published:** September 4, 2026 - **Apply:** https://www.themuse.com/jobs/cargurus/principal-software-engineer-devx-architecture ## About the Role * Eight or more years of hands-on, fullstack software design and development, including at least five years of Java. Experience with client and server side JavaScript, including React, Node, and Remix, along with Terraform experience is a plus * Experience building performant, large-scale web applications and cloud-native systems on AWS or similar cloud providers * Working knowledge of authentication and identity standards (OAuth2/OIDC), or a strong appetite to learn them * Hands-on experience applying modern AI coding tools (assistants, agents, MCP) to real engineering work * Comfort writing tests, using observability tools, and owning projects end to end * Curious, collaborative, and eager to learn * Demonstrated deep expertise in a relevant technical stack, including critical code reviews, scalability, architecture, testing strategy, performance, and cross-team integration. * Bachelor's degree in Computer Science or equivalent ## Description The Developer Experience Architecture team at CarGurus builds the platforms, tooling, and standards that make hundreds of engineers faster, safer, and more productive. You will work on our highest-leverage initiatives: standardizing AI agentic development (Claude Code, our internal plugin marketplace, and MCP integrations), evolving our authentication and identity platform (Keycloak, OAuth2/OIDC), and improving the paved paths for service and job creation on AWS. These are complex, cross-cutting problems with global impact. You will own your projects and partner with engineers and product managers across the org. And no, you do not need to know about cars to work here., * Design and ship developer tooling, core frameworks, and reusable templates that raise engineering productivity and quality * Advance our agentic development ecosystem: Claude Code configuration and governance, plugins and skills, and MCP servers * Strengthen the Auth service and agent identity model using Keycloak, OAuth2, and OIDC * Build and operate services with Java, Spring Boot, AWS, and Kubernetes * Define standards, guardrails, and best practices, then drive adoption across product teams * Continuously assess, root cause, and improve system reliability and performance * Define, communicate, and drive technical solutions and complex projects from concept through successful completion, ensuring clear direction, accountability, and measurable outcomes * Partner effectively across teams to influence decisions, resolve complex technical challenges, and build alignment without relying solely on direct authority * Demonstrate strong business judgment by prioritizing work based on customer and business impact, translating technical decisions into measurable outcomes, and consistently focusing on delivering meaningful results. ## Related Videos - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Agile work at CARIAD – Creating a customer web application for controlling the vehicle ](https://www.wearedevelopers.com/videos/200-agile-work-at-cariad-creating-a-customer-web-application-for-controlling-the-vehicle) - [Get started with securing your cloud-native Java microservices applications](https://www.wearedevelopers.com/videos/123-get-started-with-securing-your-cloud-native-java-microservices-applications) - [Delay the AI Overlords: How OAuth and OpenFGA Can Keep Your AI Agents from Going Rogue](https://www.wearedevelopers.com/videos/1637-delay-the-ai-overlords-how-oauth-and-openfga-can-keep-your-ai-agents-from-going-rogue) - [Delegating the chores of authenticating users to Keycloak](https://www.wearedevelopers.com/videos/1558-delegating-the-chores-of-authenticating-users-to-keycloak) - [Remote Driving on Plant Grounds with State-of-the-Art Cloud Technologies](https://www.wearedevelopers.com/videos/251-remote-driving-on-plant-grounds-with-state-of-the-art-cloud-technologies) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [How software is steering vehicle technology](https://www.wearedevelopers.com/magazine/515-how-software-is-steering-vehicle-technology) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)