This role requires a minimum of four (4) days per week working onsite at EnStream’s head office in Toronto; EnStream is a trusted leader in secure mobile identity verification and data services in Canada. We operate at the intersection of telecommunications, identity, and data privacy—enabling businesses and governments to deliver seamless, secure digital experiences. Jointly owned by Canada’s largest telecom providers, EnStream provides secure access to mobile network insights that drive innovation and protect consumers.

We are committed to advancing secure, privacy-first identity solutions that leverage trusted telco data to serve enterprises, financial institutions, and public sector organizations across Canada.

The Mobile

Developer at EnStream owns the native iOS and Android SDKs that our partners embed in their own applications — the client-side entry point to EnStream’s identity and fraud-prevention services, including SIM-based authentication aligned with GSMA standards.

This is SDK engineering rather than app engineering: the deliverable is a small, secure, well-documented library that other developers integrate once and depend on for years. The role covers the full product surface — public API design, deep platform and mobile-networking work, packaging and release, reference applications, and the integration documentation that partner engineering teams actually read. Because our SDKs run inside banking and fintech applications, correctness, backward compatibility, binary footprint, and privacy are treated as first-class requirements, not afterthoughts.

Own the design, development, testing, and release of EnStream’s native iOS (Swift) and Android (Kotlin) SDKs, end to end. Design public SDK interfaces that are small, hard to misuse, and stable across releases — with deliberate versioning, deprecation, and backward-compatibility practices.

Handle the realities of mobile networks:



Keep the SDK lightweight and dependency-light: minimize binary footprint, avoid transitive dependency conflicts inside host applications, and collect no more data than an integration requires.

Own SDK distribution and release engineering: Define a test strategy appropriate to code you cannot hot-fix in production: unit tests, instrumented and device-farm testing across OS versions and device models, and simulated carrier conditions. Support partner integration teams — triage integration issues, reproduce customer-reported failures from logs, and feed that friction back into API and documentation design. Instrument the SDK for diagnostics and error reporting that helps partners debug quickly without exposing end-user data.

Track iOS and Android platform releases and get ahead of breaking changes in permissions, privacy manifests, and network stack behaviour. Actively participate in agile ceremonies as part of a Scrum team, helping drive feature delivery and platform modernization. Degree in Computer Science, Software Engineering, or equivalent practical experience. ~Experience building and shipping SDKs or libraries consumed by third-party developers, beyond end-user application is a strong asset but not a requirement ~ Swift for iOS and Kotlin for Android. ~ Proven public API design skill: interface design, semantic versioning, deprecation strategy, thread-safety guarantees, and clear error-handling contracts. ~ Robust understanding of mobile networking: certificate handling, connection lifecycle,



radio and Wi-Fi transitions, and behaviour under unreliable network conditions. ~ Experience packaging and distributing libraries (Swift Package Manager, CocoaPods, XCFramework, Maven Central / AAR), including artifact signing and release process. ~ Strong asynchronous and concurrency skills (Swift Concurrency / GCD, Kotlin coroutines). ~ Solid automated testing discipline for library code, including mocking network layers and testing across OS versions and device configurations. ~ Security-conscious mindset: secure storage (Keychain, Android Keystore), certificate pinning, code obfuscation, and careful handling of personal information. ~ Prior experience at a vendor shipping SDKs into regulated customers (banks, fintechs, insurers), including their security review, penetration test, and SBOM processes.

Familiarity with device attestation and anti-fraud signals (App Attest, DeviceCheck, Play Integrity, root/jailbreak and emulator detection).

Experience wrapping native SDKs for cross-platform frameworks (React Native, Flutter, Cordova). Backend familiarity (Python, Java) and REST API design — enough to help shape the service contract the SDK consumes. Contributions to open-source mobile libraries, or public technical writing and developer advocacy.

You have shipped code that other developers depend on, and it shows in how you design an interface: small surface area, obvious usage, no sharp edges. You are equally comfortable in Swift and Kotlin, you are curious about what actually happens on the radio when a request leaves the device, and you treat a confusing integration guide as a bug in your own work. At EnStream, you will play a critical role in shaping the architecture of trusted digital identity and data platforms used across Canada.

Join us in building the foundation for secure digital interactions in Canada. #

📌 Developer - C#, .Net , SQL (Toronto)
🏢 EnStream
📍 Toronto