Founding/Senior Mobile Developer (iOS, Swift, Kotlin) - New York - Hybrid - Opportunity to work for

Founding/Senior Mobile Developer (iOS, Swift, Kotlin) – New York – Hybrid – Opportunity to work for a well-known Series D Funded Company!

All candidates should make sure to read the following job description and information carefully before applying.

One of the US's most well known consumer electronics companies – known as a leader in the space that they are in, are currently searching for an experienced Founding/Senior Mobile Developer (iOS, Swift, Kotlin) to join their growing Mobile division!

You probably will have heard of them as their meteoric rise has made them the leader in their space with many families having their product in their own homes!

This is an excellent opportunity for an experienced Mobile Developer with iOS, Swift, or Kotlin experience to take the next step into a challenging position with a stable, well-known American brand name and leader!

About the Company:

Founded just over a decade ago, they have taken the market by storm.

They raised $50m in Series D funded in late 2025, meaning they have raised over $125m in total since their foundation.

Their product offerings include physical consumer electronic devices, a sophisticated app, and research material provided by industry-leading medical professionals, scientists, engineers, and thought leaders.

They generate over $100m in revenue and their products are used by families all across the US!

They are trusted by over one million families!

They have an office in Central Manhattan and they offer a flexible, hybrid working culture.

About the Founding/Senior Mobile Developer (iOS, Swift, Kotlin) Vacancy:

For their new team, you will be joining as the Founding Mobile Developer.

As the first mobile engineer on a brand-new Growth team, you will be part of a cross-functional team that owns the whole customer funnel, from initial consideration to purchase, subscription, engagement, and recommendation.

Additionally, you will be the first R&D engineer at their US site, where your boss and the rest of the team will be in various time zones.

Someone that maintains context, makes choices, unblocks themselves, and understands when to ask a question instead of waiting for a sync is what they are searching for.

You will:

• Create and deliver features for iOS and Android from start to finish, including paywalls, onboarding, subscription flows, in-app messaging, and referral mechanics. Work at all client stack levels, including backend, product, design, and quality assurance

• Create the client side of our measurement system, which includes feature flags, experiment assignment, and event instrumentation. xhyhwjd Each decision the team makes is assessed using data

• Examine code, assess implementations, and provide constructive criticism

• Use Kotlin Multiplatform and Compose for iOS; they are already working with it. If you have any experience with KMP or would like to learn more, they are open to that

Ideal Requirements for the Founding/Senior Mobile Developer (iOS, Swift, Kotlin) Vacancy:

• Several years building production mobile apps, on both iOS and Android

• Strong Kotlin and Swift

• Production experience with Jetpack Compose and/or SwiftUI

• Experience owning a project end to end and shipping it

• Solid grounding in OOP, concurrency and clean architecture

• Real care about UX, testing and code quality

• Kotlin Multiplatform - an advantage

Apply to the Role:

Roles like these are snapped up very quickly, so act now if you do not want to miss out! Reply to this advert or email your CV to

Remote working/work at home options are available for this role.