Mobile Product Engineer, iOS++ — San Francisco, CA

About rJHd4

rJHd4 is an AI research and product company building the voice interface for computing. AI can now reason, code, and act. Yet, humans still do the work of the interface. We think that’s backwards.

Our first products are qwMd, which lets you speak naturally in any application, and Notetaker, which builds context across conversations. We’re building toward an interface that can perceive, understand, and take action with earned trust. That means solving hard problems across models, systems, and product - and caring about the final human experience as deeply as the technology underneath it.

We’re a talent-dense team that holds strong opinions, tests them quickly, and builds technology that sparks joy. Our goal is to build the first voice interface used every day by a billion people.

About The Role

You’ll own a full product at rJHd4, be responsible for making it great and scale it from early ideas to millions of users. You'll be working directly with the founders, often taking the latest research from YmhJe FE7wZ5Hv Interfaces Lab into agentic experiences across iOS, Apple Watch, CarPlay, and beyond.

We’re hiring for both Senior and Staff roles.

What You’ll Do

• Own an iOS product from idea through launch to millions of users.

• Shape new products with the founders and designers.

• Build polished, fast, reliable experiences across iOS, Apple Watch, CarPlay, etc.

• Make architecture decisions that support rapid shipping and growth.

• Improve what you ship through user feedback and production data.

You may be a fit if

• You’ve shipped a substantial native iOS app that people use and love.

• You have strong product taste and care about interaction details.

• You know Swift and iOS deeply, including concurrency, performance, and debugging.

• You’ve owned a product through sustained iteration and growth.

• You turn ambiguous problems into thoughtful, working products.

Independent apps and projects are a strong signal. Experience on both small and larger teams, and technical breadth beyond iOS, are welcome.

Get to know us

• Our operating principles

• Our Series B

• Advancing HCI

• Introducing YmhJe FE7wZ5Hv Interfaces Lab

Logistics

We sponsor H1B, O1, EB1, L1, STEM OPT, and more. We can't guarantee sponsorship for every role, but if we make you an offer we'll make every reasonable effort, with help from our immigration law firm.

We strongly encourage you to apply even if you don't meet every qualification. The strongest candidates we meet rarely do, so don't exclude yourself prematurely. We're rethinking how humans interact with AI, and doing that well demands diversity of perspective and experience.

We're committed to a fair and accessible interview process. If you need any accommodations or adjustments, please let us know.

Compensation Range: $220K - $350K