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Psiphon | iOS / Flutter Developer | Toronto (Hybrid) | Full-time

Psiphon is a VPN app used by millions of people to access the open internet in regions where it's restricted. Small team, software that matters.

We're building the next-gen client app in Flutter (iOS, Android, macOS, Windows) and need someone who can work across both iOS native and Flutter. Split is roughly 65% Flutter, 35% iOS native (Swift, StoreKit, entitlements, network extensions). You'll have mentorship from a senior iOS specialist for the deeper networking work.

Day to day: Feature development in Flutter, iOS platform integration (subscriptions, permissions, App Store), and occasionally going deep into network extensions and packet tunnel providers. Small team (~3-4 core devs), high ownership, low ceremony.

Looking for: Strong Swift experience beyond just UIKit/SwiftUI app dev, comfort with the iOS ecosystem (App Store process, provisioning, StoreKit), and willingness to context-switch between Swift and Dart in the same day. Flutter experience is a strong plus but not required if you pick up frameworks quickly.

Contact: [email protected]

Psiphon | iOS / Flutter Developer | Toronto (Hybrid) | Full-time

Psiphon is a VPN app used by millions of people to access the open internet in regions where it's restricted. Small team, software that matters.

We're building the next-gen client app in Flutter (iOS, Android, macOS, Windows) and need someone who can work across both iOS native and Flutter. Split is roughly 65% Flutter, 35% iOS native (Swift, StoreKit, entitlements, network extensions). You'll have mentorship from a senior iOS specialist for the deeper networking work.

Day to day: Feature development in Flutter, iOS platform integration (subscriptions, permissions, App Store), and occasionally going deep into network extensions and packet tunnel providers. Small team (~3-4 core devs), high ownership, low ceremony.

Looking for: Strong Swift experience beyond just UIKit/SwiftUI app dev, comfort with the iOS ecosystem (App Store process, provisioning, StoreKit), and willingness to context-switch between Swift and Dart in the same day. Flutter experience is a strong plus but not required if you pick up frameworks quickly.

Contact: [email protected]

State censorship circumvention is exactly what Psiphon is for! So yes, try it.

(Disclaimer: I work there.)

> The article is somewhat wrong when it says Unicode may "change character normalization rules"; new combining characters may be added (which affects the class sort above) but new precombined ones cannot.

That's fair. I updated the wording in the post.

Thanks for the display info. It's cool and horrible and out of scope for my post.

If you can get away with that, that's great. But I feel like there are still plenty of cases where you want to limit the lengths of particular fields (and communicate to the user which lengths were exceeded).

Valid question, and I think you're right in the abstract and most of the time. But I also think you end up with a mismatch.

What's the concrete spec for the limit if you've only got 10x storage per grapheme cluster?

Probably you end providing the limit in bytes. That's fine, but it's no longer the "hybrid counting" thing anymore.

@dang Can the title be changed? It should be "The best – but not good – way to limit string length". Thanks.

Except that TOTP codes are MitM phishable. U2F with its URL-checking (via browser cooperation) is needed.