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
Job Description (English)
Role Overview
- 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.
What You’ll Do
- 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, CocoaPods, XCFramework, Maven Central/Gradle, signed artifacts, changelogs, 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.
What You Bring
Must-Have Skills & Experience
- 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 behavior under unreliable network conditions.
- Experience packaging and distributing libraries using Swift Package Manager, CocoaPods, XCFramework, Maven Central/AAR, including artifact signing and release processes.
- Strong asynchronous and concurrency skills using Swift Concurrency/GCD and Kotlin Coroutines.
- Solid automated testing discipline for library code, including mocking network layers and testing across OS versions and device configurations.
- Proficiency with Git and CI/CD tools for mobile development such as Fastlane, GitHub Actions, Bitrise, or similar.
- Security-conscious mindset with experience in secure storage (Keychain, Android Keystore), certificate pinning, code obfuscation, and careful handling of personal information.
- Excellent written communication skills, with the ability to produce integration documentation that partner developers can follow without requiring support.
- Strong problem-solving and analytical skills, with a detail-oriented approach to compatibility and edge cases.
What Sets You Apart
- Prior experience at a vendor shipping SDKs into regulated customer environments such as banks, fintechs, or insurers, including security review, penetration testing, and SBOM processes.
- Familiarity with device attestation and anti-fraud signals, including App Attest, DeviceCheck, Play Integrity, and root/jailbreak or emulator detection.
- Experience wrapping native SDKs for cross-platform frameworks such as React Native, Flutter, or Cordova.
- Hands-on use of device farms such as Firebase Test Lab, BrowserStack, or AWS Device Farm, and testing against real carrier SIMs.
- Backend familiarity with Python, Java, and REST API design sufficient to help shape the service contracts consumed by the SDK.
- Experience with mobile observability and crash reporting at scale.
- Contributions to open-source mobile libraries, public technical writing, or developer advocacy.
Ideal Candidate
- Has shipped code that other developers depend on and demonstrates excellent SDK design principles with small, intuitive, and reliable interfaces.
- Equally comfortable working in Swift and Kotlin.
- Interested in understanding mobile networking behaviour at a deep level.
- Treats unclear integration documentation as a product quality issue and continuously improves developer experience.
- Balances platform expertise, technical rigor, reliability, security, and usability in every release.
Vacancy Status / Statut du poste
This is an active position currently open for hiring.
Use of Artificial Intelligence / Utilisation de l'intelligence artificielle
emergiTEL uses artificial intelligence to help identify and source candidates for this role. All assessment and selection decisions are made by our recruiters, a human is always involved, and no applicant is evaluated or rejected by automated means alone. / emergiTEL a recours à l'intelligence artificielle pour aider à identifier et à trouver des candidats pour ce poste. Toutes les décisions relatives à l'évaluation et à la sélection sont prises par nos recruteurs ; une intervention humaine est systématiquement assurée, et aucun candidat n'est évalué ou rejeté uniquement par des moyens automatisés.