Principal Engineer – Android

Cosmo Technologies

. Set technical strategy and own the architecture, reliability, performance, and security of the Android platform across teams and products .

Posted 10/28/2026full-timeToronto • CanadaLead💰 CA$120,000 - CA$140,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in Android platform architecture, security, and performance, with a strong focus on mentoring and leading engineering teams. Proficient in integrating hardware drivers and services, while driving best practices and technical standards across multiple concurrent workstreams.

Highest-signal resume keywords

Android SDKKotlinJavaAIDLAndroid Architecture

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Android StudioAOSPMVVMClean ArchitectureDaggerHiltCoroutinesFlowRxJavaJUnit

Soft Skills

Excellent CommunicationOwnershipProblem-Solving

Tools & Technologies

CI/CDFeature FlagsAnalyticsStaged ReleasesAndroid Framework

Industry Keywords

GNSSNetworkingConnectivitySystem ServicesSmartwatchesWearablesIoTEmbedded AndroidLinux DriversResponsible AI

Tech Stack

Tools & technologies

AndroidDaggerIoTJavaJUnitKotlinLinuxRxJavaC++

About the role

Key responsibilities & impact

Set technical strategy and own the architecture, reliability, performance, and security of the Android platform across teams and products
Serve as the deep technical authority in critical domains such as GNSS, calling, networking, connectivity, power, or system services
Lead technical design end to end, including scoping ambiguous problems, evaluating tradeoffs, producing and reviewing design documents, and aligning teams and stakeholders
Own AIDL interfaces and communication between Android components
Integrate hardware drivers and services with system and product applications
Lead resolution of cross-layer issues spanning hardware, system services, performance, battery, memory, networking, and applications
Define and model engineering processes involving PRs, tickets, unit test coverage, development testing, and rigorous code review
Lead and participate in agile ceremonies and break large initiatives into parallel workstreams
Operate across multiple concurrent workstreams, sequencing and unblocking them while maintaining technical depth
Mentor engineers at every level, including onboarding and ramping new hires
Serve as senior technical point of contact for hardware, firmware, product, design, and QA teams
Drive platform-wide standards, tooling, best practices, and technical roadmap influence
Set direction on AI-assisted development and drive adoption where it improves quality or productivity
Build and support technology products for children, including the JrTrack Kids Smartwatch and Mission Control Parent App

Requirements

What you’ll need

8+ years of professional software engineering experience, with 6+ years focused on Android
4+ years acting as a technical leader or principal-level IC, setting direction and mentoring engineers across teams
3+ years of focused expertise in one or more platform domains such as GPS, calling, networking, connectivity, or system services
7+ years hands-on with Android SDK, Android Studio, Kotlin, and Java
4+ years hands-on with AOSP, Android framework, system services, privileged apps, HALs, or custom Android devices
4+ years of deep knowledge of Binder, AIDL, drivers, and hardware-to-application data flow
Expert understanding of Android architecture, security, performance, and UI development
4+ years with MVVM or Clean Architecture, modularization, Dagger or Hilt, Coroutines, Flow, or RxJava
3+ years of experience with XML Views and Jetpack Compose
Expert testing and debugging skills using JUnit, Robolectric, Espresso, logs, traces, and bug reports
4+ years working with CI/CD, feature flags, analytics, staged releases, and large codebases
Track record of setting and upholding engineering processes across a team
Proven history of sound architecture and tradeoff decisions under ambiguity and constraint, affecting multiple teams or products
Excellent communication, ownership, and problem-solving skills, with ability to drive alignment across the organization
Nice to have: 3+ years with smartwatches, wearables, IoT, embedded Android, or other custom hardware
Nice to have: Linux drivers, JNI, C/C++, Soong, or the AOSP build system
Nice to have: Published Android applications or open-source contributions
Nice to have: Design systems and global product releases
Nice to have: Org-level engineering process, tooling, or release infrastructure
Nice to have: Responsible AI-assisted development practices
Fluent in English
Comfortable coordinating across time zones and cultures

Benefits

Comp & perks

100% employer paid supplemental medical policy
Remote working environment
Generous PTO
Opportunity to make a significant impact in a fast-growing company
Collaborative, creative, and supportive work environment