Mobile Building Engineer Jobs in California (NOW HIRING)

This role is on-site in San Francisco in the Dogpatch neighborhood.

Giga has recently raised a $61M Series A and is working with Fortune 500 customers to deploy the next generation of customer experience - real-time AI agents that can understand emotion, resolve issues instantly, and scale across the world's largest enterprises.

Industry leaders like DoorDash trust Giga with their most complex support and operations workflows across voice, chat, and email, in high‑stakes regulated environments where accuracy and compliance matter. We’re at an exciting inflection point.

While we’ve found real commercial success, our ambitions are larger: to become the go‑to AI platform for all enterprise automation, powered by our voice superintelligence. The work affects millions of people every day, and our team has the autonomy to make true impact – with brilliant founders, a clear path forward, and the kind of momentum that defines generational companies.

We’re looking for a Staff Software Engineer to own our iOS and Android SDKs that our customers use to embed Giga’s chat and voice agents into their mobile apps. You’ll lead the technical direction for how our agents show up on mobile, making architectural decisions around UI surfaces, animations, voice interactions, and performance that raise the bar for engineering quality across the team.

This is a role for someone who wants to build, not just advise. You’ll write code, own the iOS and/or Android mobile infrastructure, and ship, but you’ll also be expected to think beyond your immediate work. Working closely with design and our web frontend team, you’ll identify what mobile experiences we should be building next and ensure our native integrations feel as considered and cohesive as our core product.

You’ll drive the technical direction for how Giga agents live on mobile devices. Some examples of what you’ll own:

• Mobile SDK architecture: Leading the design, implementation, and evolution of our native iOS and Android SDKs. You’ll make the core architectural tradeoffs required to embed our voice and chat agents seamlessly into customer apps.

• Deep OS integrations: Pushing the boundaries of what native mobile can do. You will own how our agents interact with iOS / Android capabilities like voice routing, background execution, notifications, and app extensions so the agent feels truly "at home" on the device.

• UI & performance excellence: Sweating the details on motion, gesture handling, and accessibility. You’ll set the bar for mobile quality, ensuring our interfaces boast smooth animations, zero latency, and resilient offline behavior.

• Mobile: Swift (iOS), Kotlin (Android)

• Backend: Python (Django/FastAPI), TypeScript (Node.js)

• Frontend: TypeScript, Next.js (you’ll interact with this when needed)

• Infrastructure: AWS, Modal, Kubernetes, Postgres

• Have 8+ years of native iOS (Swift) engineering experience, with a track record of shipping complex apps or SDKs at scale

• Have strong opinions on clean SDK and API design, and deeply empathize with the external developers who will integrate your work

• Can take a vague product requirement and turn it into a fluid, responsive mobile experience without much guidance

• Possess deep UX sensitivity—you sweat the details on motion, gesture ergonomics, and accessibility to make interfaces feel "just right"

• Understand the depths of iOS and can push platform‑native capabilities (like voice routing, background execution, and app extensions) to their limits

• Want to be hands‑on at a company where senior engineers ship code, not just review it

• Are comfortable occasionally crossing the stack (e.g., GraphQL, Go) to unblock yourself and fine‑tune end‑to‑end flows

• Competitive base + bonus + equity

• Catered lunch daily

• Dinner stipend

• $500/month wellness & commuter benefit (gym, fitness classes, mental health)

• 401(k) plan

• Medical, dental, and vision coverage

Giga is an equal opportunity employer. We’re committed to providing equal employment opportunities regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by law.