Senior iOS Engineer

We are looking for a Senior iOS Engineer at Futurae who will play a crucial role in building and evolving the mobile SDKs behind our cloud-based multi-factor authentication and fraud prevention platform.

Most of our iOS code doesn't ship as an app on the App Store — it ships inside the apps of banks and insurers, where it has to be small, silent and correct. A crash, a regression or a breaking API change lands in someone else's release cycle. You treat security, backwards compatibility and reliability as a personal standard of craft.

In this role it's not just about picking up tickets from a backlog. It's about the technical evolution of our mobile stack, spotting API and architectural risks before they reach a customer's production app, and making sure authentication works on the first try for millions of end users.

You will own the lifecycle of our iOS SDK, from public API design to the CI pipelines that build, sign and publish it. You will work closely with our backend, Android and QA teams, and with the client engineers who integrate our SDK into their apps.

Here we design for the future. To give some examples:

• You will implement and maintain cryptographic operations on device — Secure Enclave-backed keys, Keychain storage, biometric protection (Face ID / Touch ID) and JWT/JWS handling — ensuring the non-negotiable Sign-then-Encrypt order is maintained for all critical operations
• You will make push-based authentication reliable in the real world: APNs delivery, background execution, poor connectivity, backgrounded and cold-start states
• You will keep our public API surface clean and stable — semantic versioning, deprecation paths, migration guides and integration documentation that client engineers can follow without opening a support ticket
• You will strengthen our device integrity and anti-tampering signals, and expand what the SDK can tell us about the environment it runs in
• You will consistently deliver idiomatic, concurrency-safe, well-tested Swift code

Requirements

Several years of experience in mobile development, with at least 3 years building production iOS applications or frameworks in Swift

Experience designing and maintaining a public API — an SDK, framework or library consumed by other engineers — or strong modularization work in a large codebase

Solid command of Swift concurrency (async/await, structured concurrency, GCD), memory management and thread safety

Hands-on experience with the Apple security stack: Keychain, Secure Enclave, LocalAuthentication and biometric flows

Experience with push notifications (APNs) and background execution modes

Deep understanding of RESTful API consumption, TLS and secure network communication

Strong understanding of authentication and authorization protocols including JWT/JWS

Proven experience with automated testing (XCTest), dependency injection and writing code that is testable and decoupled

Experience with iOS CI/CD: code signing, provisioning, automated build and release pipelines

Experience with version control systems (Git) and collaborative development workflows

Fluency in English, both written and verbal, with good communication skills

A collaborative team player who embraces rapid technological change and a nimble startup culture

Bonus Skills

Knowledge of modern authentication standards including WebAuthn/FIDO2 and passkeys (AuthenticationServices)

Experience with App Attest / DeviceCheck, jailbreak detection or other device integrity and anti-tampering techniques

Experience distributing an SDK via Swift Package Manager, CocoaPods or XCFrameworks

Objective-C interoperability and support for legacy integrations

Experience with cross-platform bridges (React Native, Flutter, Capacitor)

Familiarity with WKWebView integration and its lifecycle pitfalls

Experience with automated testing on device clouds and real-device labs

Experience with cryptographic operations and secure token handling

Familiarity with Android/Kotlin, or an interest in keeping two platform SDKs behaviorally consistent

Benefits

Work with purpose and take ownership in an international team

Grow with a company where your ideas matter

Freedom to work remotely or at our Zurich HQ

Join our yearly company-wide event

Keep learning with a yearly education budget

Joint co-working days for remote teammates