Lead 3P Integration Engineer (On-site, Location: Redmond WA)

We are looking for a lead engineer with extensive hands-on experience in architecting, building, validating, and bringing up third-party (3P) service integrations on AI-powered wearables platforms. The role focuses on leading the end-to-end integration of external partner services (music streaming, commerce, content providers) into Client''s AI wearables ecosystem using self-serve SDK/MCP connector tooling. As a lead, you will drive technical strategy, mentor junior engineers, establish best practices, and own the integration roadmap for multiple 3P partners.

Required Skills & Experience

• 8+ years of hands-on software engineering experience with PHP/Hack and/or C++ along with iOS (Swift) and Android (Kotlin) experience
• 3+ years in a technical lead or senior individual contributor role driving integration/platform projects
• Strong problem solving, system design, and debugging skills across distributed systems
• Deep understanding of RESTful Web API design, authentication mechanisms (OAuth 2.0, API keys), and request/response lifecycle
• Proven ability to architect and scale integration frameworks that support multiple concurrent partner onboardings

Extensive Experience in 3 or more of the following areas:

• Architecting and building API connectors / plugins against an SDK or integration framework at scale
• Working with MCP (Model Context Protocol) or similar AI tool-calling standards and defining tool schemas
• Integrating media streaming services (audio playback, content search, media URL handling, DRM)
• Designing and validating end-to-end integration flows (search → action → response) with error recovery
• Building automated integration test frameworks and E2E validation suites with CI/CD pipelines
• Leading partner API integrations across multiple external providers simultaneously (music, commerce, content)
• Designing error handling strategies, rate limiting, retry logic, circuit breakers, and graceful degradation
• Defining and enforcing quality gates (TSR/FACR or equivalent) for production-readiness

Leadership & Ownership:

• Own the technical roadmap for 3P integration bring-up across 5+ partner connectors (Genie Music, ANT Commerce, Melon Music, LINE Music, Audible → DAT)
• Drive the "self-serve playbook" initiative — establish repeatable processes that reduce per-connector bring-up from weeks to days
• Mentor and guide other CWs/engineers on integration patterns, code quality, and debugging approaches
• Coordinate with AI Extensibility engineering leads for architecture reviews, code reviews, and quality gates
• Provide technical input on partner API feasibility assessments and integration complexity estimates
• Proactively identify risks, blockers, and dependencies across concurrent integration streams

Preferred Attributes:

• Excellent documentation, communication, and stakeholder management skills.
• Experience creating and scaling repeatable integration playbooks and runbooks across multiple teams.
• Deep familiarity with AI/LLM tool-calling architectures (function calling, tool schemas, tool orchestration, agent frameworks).
• Experience with media streaming protocols, DRM, and native audio playback pipelines on embedded/mobile devices.
• Demonstrated ability to work autonomously, make technical decisions, and drive projects to completion with minimal oversight.
• Experience with Phabricator-based code review workflows and Meta''s development practices.
• Familiarity with Meta''s wearables platform & Ray-Ban Meta smart glasses.
• Track record of improving team velocity and engineering processes.
• Passion for building scalable, repeatable integration patterns that compound over time.
• Experience in using AI-powered productivity and development tools.