Sr Full Stack Engineer (Javascript / React / C) (México)
Open to LATAM candidates | RemoteOverviewWe are seeking a highly skilled Senior Full Stack Engineer (JavaScript / React / C#) with strong experience in modern web technologies and backend development.
The idóneo candidate is an autonomous problem-solver who can take ownership of complex challenges, contribute to scalable architecture, and mentor other engineers within the team.Key ResponsibilitiesDesign, develop, and maintain scalable web applications using JavaScript, React, and C#Build and integrate APIs, ensuring high performance and reliability across servicesImplement Backend-for-Frontend (BFF) patterns to optimize frontend-backend communicationDevelop responsive and user-friendly interfaces aligned with modern design standardsTroubleshoot and debug complex technical issues independentlyCollaborate with cross-functional teams to define and deliver technical solutionsLead technical initiatives and provide mentorship to junior and mid-level engineersContribute to architectural decisions and best practices across the engineering teamRequired QualificationsStrong proficiency in JavaScript, React, C#, and SQLHands‐on experience with API integrations and distributed systemsProven ability to work autonomously and solve complex problems without supervisionExperience implementing BFF (Backend-for-Frontend) architectureSolid understanding of responsive design principlesDemonstrated experience leading or mentoring technical teamsExperience with JWT‐Secured Authorization Requests (JAR), JWK key management, and token lifecycle managementStrong understanding of claims‐based identity, token validation, and secure redirect URI handlingExperience in secure credential management (Azure Key Vault, Cosmos DB secrets storage)Experience with external IdP integrations where your platform acts as a Service Provider (SP)Nice to HaveExperience with GraphQLFamiliarity with Microsoft Azure cloud servicesExperience integrating or working with SOAP/ASP‐based systemsUnderstanding of design and implementation of Identity Provider (IdP) solutionUnderstanding of Duende IdentityServer (or similar: IdentityServer4, Auth0, Okta) in production environmentsKnowledge of OAuth 2.0 flows (authorization code, client credentials, PKCE) and OpenID Connect (OIDC)Understanding of how to implement SAML 2.0 SSO integrations, including signature verification and assertion processing#J- *-Ljbffr
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