tl;dr: If you thrive in a small team that ships fast and takes pride in its work, help us squeeze a million chat messages into one iOS app without making it explode. If you want to build an app which touches every API in the system and customers actually love, we love to have you

About Us

Zenzap is a professional work-chat app built for everyone. Our customers - from neighborhood nail salons to global banks - get a single, structured, and secure place to talk, share, and get work done without the chaos of consumer chat apps.

Every day hundreds of new organizations switch to Zenzap, trusting us to keep their conversations flowing and their data safe and taking them to the next level with professional super powers.

We’re backed by top-tier investors, obsessed with great product design, and growing quickly.

Our mobile app is local-first with 1M+ messages in the local DB for most users, promising interesting challenges not only for UI features but also for the technical aspects of the app.

Role Description

As an iOS tech lead, you'll help architect the app to take it to the next level as well as implement complex features, taking end-to-end ownership from working with the design team to shipping to app store. We are obsessed with taking complex features and making them accessible, fast and fun.

Our iOS team is small and mighty so you'll have an outsized impact on the company.

We touch (almost) every possible aspect of the iOS capabilities, from notification extension and share extension to audio and video, WebSockets, drawing on canvases and much much more.

We utilize the latest technologies from SwiftUI and async-await, CoreData and publishers. Take pride in making the app something we love to use daily.

Our offices are located in Sharona, and we are in the office Monday and Wednesday

What you’ll do

• Craft polished, high-performance features - from custom messaging UIs to audio/video calling and everything in between
• Push the limits of local-first architecture: optimize a multi-million-row SQLite DB, fine-tune sync with WebSockets, and keep the app buttery-smooth offline
• Own projects end-to-end: scope, design, code, test, release, and monitor
• Pair with Product & Design to prototype new ideas and iterate fast
• Raise the bar on code quality, automation, and engineering best practices
• Mentor teammates and help us hire the next wave of iOS talent

What You Bring

• 5+ years of Swift experience, with deep Swift fluency.
• SwiftUI mastery and battle-tested knowledge of async await and publishers.
• Track record shipping large-scale, consumer-grade apps to the App Store.
• Comfort profiling, debugging, and squeezing performance out of mobile hardware.
• Clear, empathetic communication - bonus points if you love giving (and getting) feedback.

Bonus Points

• Built a local-first / offline-first product before.
• Hands-on with Core Data internals, WebSockets, or WebRTC.
• Exposure to multimedia (in-app video, voice messages, Canvas drawing).