Mobile Application Developer

emergiTEL is hiring a Mobile Developer for our client in the Digital identity industry. This is a Permanent role.

Compensation: $100,000 - $120,000/year

Location: Toronto, ON

• The Mobile Developer owns the native iOS and Android SDKs that partners embed in their own applications, serving as the client-side entry point to 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, stable, well-documented library that other developers integrate once and depend on for years.
• The role covers the full product surface, including public API design, deep platform and mobile-networking work, packaging and release, reference applications, and integration documentation.
• Because the SDKs run inside banking and fintech applications, correctness, backward compatibility, binary footprint, and privacy are treated as first-class requirements.

• Own the design, development, testing, and release of the 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, including Wi-Fi and cellular transitions, dual-SIM and eSIM devices, captive portals, carrier variation, timeouts, and retry behaviour.
• Keep the SDK lightweight and dependency-light by minimizing binary footprint, avoiding transitive dependency conflicts inside host applications, and collecting no more data than an integration requires.
• Build and maintain reference applications and sample integrations for both platforms that demonstrate real, production-shaped integration paths.
• Write and own developer-facing documentation, including integration guides, API references, migration notes, and troubleshooting runbooks.
• Own SDK distribution and release engineering, including Swift Package Manager, Cocoa Pods, XCFramework, Maven Central/Gradle, signed artifacts, change logs, and reproducible CI builds.
• Define a test strategy appropriate to code that cannot be hot-fixed in production, including unit tests, instrumented and device-farm testing across OS versions and device models, and simulated carrier conditions.
• Support partner integration teams by triaging integration issues, reproducing customer-reported failures from logs, and feeding that feedback into API and documentation improvements.
• 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 proactively address breaking changes in permissions, privacy manifests, and network stack behaviour.
• Partner with Backend, QA, and Security teams on service contracts, test coverage, and security reviews surrounding the SDK.
• 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.
• 5+ years of professional mobile development experience.
• Experience building and shipping SDKs or libraries consumed by third‑party developers is a strong asset.
• Current, hands‑on production experience on both platforms:
  Swift for iOS and Kotlin for Android.
• Proven public API design skills, including interface design, semantic versioning, deprecation strategy, thread‑safety guarantees, and clear error‑handling contracts.
• Strong understanding of mobile networking, including HTTP/TLS, certificate handling, connection lifecycle, radio and Wi‑Fi transitions, and behaviour under…