Senior Full-Stack Engineer: Embeddable Widgets & AI Booking

Luxoft; México; On-site; MXN 900,000 - 1,300,000; Full time

Job summary

Luxoft in Mexico is seeking an experienced Senior Full-Stack Engineer to help build a platform for marketplaces that connect providers with members and enable booking inside partner sites and apps. You’ll work on embeddable widgets, preview apps, questionnaires, booking flows, SDKs, and a remote MCP server.

You’ll implement OpenAPI-backed Python services with tenancy and partner authentication, generate SDKs, write developer docs, and maintain CI/CD pipelines.

Qualifications

• 6+ years shipping production web apps as a full-stack engineer.
• Experience building embeddable widgets, third-party-hosted components, or SDKs integrated into others' products.
• Strong TypeScript and React, plus backend services in Python (FastAPI).
• Web embedding fundamentals: custom elements, Shadow DOM, iframe sandboxing, CSP, postMessage.
• REST API design with OpenAPI; SDK generation from specs; GraphQL a plus.
• OAuth 2.0, OpenID Connect, and SSO knowledge.
• Experience handling PII/PHI under HIPAA.
• Daily use of AI coding tools; ensure AI-assisted code is correct and secure.

Responsibilities

• Build the embeddable widget as web components or iframes with style isolation, CSP compatibility, and a stable postMessage protocol.
• Develop questionnaire and booking flows, white-label theming, and the preview app to WCAG 2.1 AA.
• Implement endpoints in Python services using the OpenAPI contract, including tenancy and partner authentication.
• Generate SDKs from the OpenAPI contract, write developer documentation, and build sandbox experiences for partner developers.
• Ensure proper handling of PHI.
• Write unit, integration, and end-to-end tests; ship through CI/CD; monitor and support incident response.

Skills

Full-stack engineering

Embeddable widgets/SDKs

TypeScript

React

Python (FastAPI)

OpenAPI/REST

OAuth/OpenID/SSO

HIPAA PHI handling

AI coding tools

Ownership & accountability

Tools

OpenAPI tooling

GraphQL

FastAPI

Job description

Luxoft in Mexico is seeking an experienced Senior Full-Stack Engineer to help build a platform for marketplaces that connect providers with members and enable booking inside partner sites and apps. You’ll work on embeddable widgets, preview apps, questionnaires, booking flows, SDKs, and a remote MCP server.

You’ll implement OpenAPI-backed Python services with tenancy and partner authentication, generate SDKs, write developer docs, and maintain CI/CD pipelines.