Full Stack Engineer

Title: Full-Stack Enterprise Systems Developer 3-month contract Onsite - Austin, TX $80-115/hr The Developer, Gatekeeper App will design, build, and maintain a secure internal application within client OS that supports authentication, access control, and operational workflows for Gatekeeper use cases. This role is responsible for delivering a reliable, maintainable, and user-friendly experience that integrates with MCP, Cloudflare Access, OAuth-based authentication, and related APIs. Key Responsibilities Design and build the Gatekeeper app using modern frontend development practicesImplement interactive user flows for setup, configuration, validation, and status reportingIntegrate with MCP tools, Cloudflare Access, and OAuth-based authentication flowsDevelop secure API integrations with internal and external systemsManage environment variables, secrets, and configuration in a secure and maintainable wayAdd input validation, error handling, logging, and troubleshooting supportPartner with stakeholders to refine requirements and improve workflow usabilityEnsure the application follows security, reliability, and Cloudflare OS standardsDocument behavior, setup steps, and operational considerations for maintainabilityRequired Qualifications 3+ years of software development experience, or equivalent practical experienceStrong experience with ReactStrong experience with JavaScript or TypeScriptExperience building and maintaining web applications or internal toolsExperience integrating with REST APIs and JSON-based servicesFamiliarity with OAuth, authentication, and authorization conceptsFamiliarity with secure configuration and secrets handlingUnderstanding of debugging, logging, and production support practicesWorking knowledge of security best practices, including least privilege and input validationPreferred Qualifications Experience building internal enterprise applications or workflow toolsFamiliarity with Cloudflare products, Cloudflare Access, or Zero Trust conceptsExperience with MCP or similar tool-orchestration patternsExperience designing admin, setup, or configuration interfacesExperience supporting secure applications in an operational environmentCore Technical Skills ReactJavaScript or TypeScriptMCP integration basicsOAuth and Cloudflare Access conceptsREST API integrationSecrets and configuration managementDebugging and observabilitySecurity fundamentalsUX for setup and operational workflowsSuccess Measures The app is secure, stable, and maintainableAuthentication and access control work end to endSetup and configuration flows are clear and supportableAPI integrations are reliable and well documentedIssues can be diagnosed and resolved efficientlyWorking Style Collaborates effectively with technical and non-technical stakeholdersCommunicates clearly and documents decisions and implementation detailsTakes ownership of quality, security, and operational readinessBalances speed of delivery with maintainability and supportability