TS
Founding Full Stack Engineer (AI-Native) — Web and Mobile
Ternion SecurityBellevue, WAposted 3d ago
- PayUSD / yr
- $170k – 220k
- Where
- Bellevue, WA
- Posted
- Oct 13
- 3 days ago
- Type
- Full-time
- Setup
- On-site
EMPLOYMENT
Full-time
COMPENSATION
$170k - 220k/yr
ARRANGEMENT
On-site
At a glance
Own Ternion’s web console and mobile apps end to end, using React, TypeScript, SwiftUI, and Kotlin to make AI-native security operations simple, reliable, and usable in the field.
Summarized by AI from the original posting
What you'll do
- Own the web console end to end with React and TypeScript
- Own the iOS and Android mobile applications
- Own offline use, critical alerts, and device security on mobile
- Build fast, accessible interfaces for users under pressure
- Build and modify APIs with platform and ML engineers
- Own mobile CI, builds, and releases
- Complete a two-week field tour as a forward-deployed engineer
Requirements
- 01Production web and mobile applications shipped and owned
- 02Strong React and TypeScript skills
- 03Native iOS development with Swift and SwiftUI
- 04Production Kotlin experience
- 05Offline-first mobile data and synchronization with conflict handling
- 06Production experience with maps and live video
- 07Accessibility knowledge to WCAG 2.2 AA
- 08Daily fluent use of AI coding agents
- 09U.S. citizenship
- 10Greater Seattle area and in-person availability
Perks
Founding equityMedical coverageDental coverageVision coverage401(k)Unlimited PTO
Skills
ReactTypeScriptIosSwiftSwiftuiKotlinKotlin MultiplatformJetpack ComposeOffline First DataData SynchronizationConflict HandlingMaps
Full description
Greater Seattle area
• in person
• full time
• founding equity
We're a stealth, venture-backed company. We build AI-native security operations software for critical infrastructure. Our users protect sites that run around the clock. They're security experts. Most aren't software people. If our software needs a manual, we failed.
This seat owns the two apps our users touch: the web console and the mobile app. You build and ship both, with the design judgment to make them simple. AI agents write much of our code. You review every change and make the final call.
What You'll Do
• Own the web console end to end, from interaction design to production React and TypeScript.
• Own the mobile app. iOS ships first in SwiftUI on a shared Kotlin Multiplatform core. Android follows in Jetpack Compose on the same core.
• Own offline use, critical alerts and device security on mobile.
• Build calm, fast screens for people under pressure — on night shift, often in gloves.
• Make live data easy to act on. A new user gets it right the first time.
• Build and change the APIs your screens need, with our platform and ML engineers.
• Own mobile CI, builds and releases.
• Do a two-week field tour as a forward-deployed engineer. Bring what you learn back to the team.
What you bring
• Production apps you shipped and owned on web and mobile. Show us the work.
• Strong React and TypeScript, including real-time, data-dense screens.
• Native iOS in Swift and SwiftUI.
• Production Kotlin. Kotlin Multiplatform and Jetpack Compose are a plus.
• Offline-first data and sync on mobile, including conflict handling.
• Maps and live video in production apps.
• Accessibility to WCAG 2.2 AA.
• Design taste. You make complex things simple for non-technical users.
• Daily, fluent use of AI coding agents. You'll show us your real workflow in the interview.
• Ownership. You find problems and fix them.
• U.S. citizenship. Government and critical infrastructure work in this role requires it.
• Greater Seattle area, in person. The founding team builds together.
Nice to have: security or public-safety software.
The team
Founders with deep security and operations backgrounds lead the company. You join a small, senior engineering team with platform, ML and security systems experience.
Pay And Benefits
$170,000–$220,000 base salary, set by depth of experience, plus founding equity. Medical, dental and vision coverage. 401(k). Unlimited PTO.
How We Hire
Intro call → technical conversation → NDA and a focused take-home → in-person panel → offer. We move fast.
Apply through this posting or through the recruiter who shared it.
We're an equal opportunity employer. We consider all qualified applicants without regard to any protected status. This includes race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, and veteran or military status.