Senior SDK Engineer – Mobile & Web (iOS/Android)

Signify Technology; San Francisco (CA); On-site; USD 200,000 - 240,000; Full time

Benefits offered by this job

Equity

Core ownership of product

Office attendance near Bay Area

Job summary

Signify Technology in the San Francisco Bay Area is seeking a Senior SDK Engineer to own and ship mobile and web SDKs, APIs and the developer integration experience.

You’ll lead design, testing, documentation and sample apps, collaborate with customers, and balance 50% mobile work with web/backend tasks in a fast‑moving startup.

Regular office attendance is expected for Bay Area locals, with 2–4 trips per year for non‑local candidates and a minimum 50‑hour work week.

Qualifications

• Shipping an SDK, library, open-source project or public API used by other engineers.
• Strong mobile development across iOS and Android.
• Experience with JavaScript/TypeScript and React; web development basics.
• Ability to design, debug, test and maintain software independently.
• Experience with AI-assisted engineering tools.
• Experience in an early-stage startup with autonomy and changing requirements.
• Strong communication to support external developers.

Responsibilities

• Develop and maintain SDKs across iOS, Android and web.
• Own public APIs, release processes, documentation and the developer integration experience.
• Build advertising formats and client-side systems for publisher apps.
• Create automated testing frameworks and sample applications.
• Develop demonstration apps for prospective publishers.
• Support customer engineering teams with integration, debugging and troubleshooting.
• Communicate technical issues and progress to commercial colleagues.
• Contribute to backend and wider engineering work as priorities evolve.
• Use customer feedback and data to guide improvements.

Job description

Signify Technology in the San Francisco Bay Area is seeking a Senior SDK Engineer to own and ship mobile and web SDKs, APIs and the developer integration experience.

You’ll lead design, testing, documentation and sample apps, collaborate with customers, and balance 50% mobile work with web/backend tasks in a fast‑moving startup.

Regular office attendance is expected for Bay Area locals, with 2–4 trips per year for non‑local candidates and a minimum 50‑hour work week.