Mobile Engineer

Mobile Engineer
Lisboa
Lisboa, Lisboa, Portugal

Job Title: Senior Mobile Engineer / Architect (i
OS / Android)

Location: Remote – Portugal

Salary: €150, 000 - €180, 000

The Company

This isn’t your typical mobile app startup. The company is redefining what’s possible in
- time interaction and remote collaboration, powering
- download,
- grade screen sharing and
- browsing used by some of the biggest brands in the world. Their technology enables instant, secure, and frictionless experiences between customers and support teams, all in the browser, across devices, and at global scale.

Now they’re bringing that power to mobile, and they’re looking for a
- class Mobile Engineer to help lead the charge across Android and i
OS. If you love working close to the metal, care about performance and architecture, and enjoy engaging directly with customers to shape impactful solutions, this is your kind of role.

The Role

You’ll be the technical backbone for mobile engineering within a globally distributed team.

Your work will power customer interactions where milliseconds matter and reliability can’t be compromised.

You will:

• Architect and build deeply performant Android and/or i
  OS apps that integrate with advanced
  - time communication systems (Web
  RTC,
  - latency streaming, complex data sync).
• Work directly with enterprise customers, helping them integrate and optimise mobile experiences using your technical insight.
• Own and optimise the full mobile lifecycle: architecture, modularisation, dependency management, build pipelines, and release automation.
• Push the limits of Kotlin, Swift, and the underlying SDKs — profiling, tuning, and rethinking architecture where needed.
• Collaborate
  - functionally with backend, systems, and security engineers to deliver secure, scalable, and
  - performing mobile experiences.
• Prototype and benchmark
  - generation features in areas like
  - device encoding, network optimisation, and secure session management.
• Act as a mobile domain expert — setting technical direction, mentoring others, and influencing
  - term product strategy.

You Should Have

• Deep
  - on experience in native mobile development — either Android (Kotlin) or i
  OS (Swift), ideally both.
• Proficiency in Swift, with comfort reading or maintaining Objective-C codebases for
  - level integrations.
• Proven ability to build and scale complex,
  - critical apps or SDKs, ideally for enterprise or platform use.
• Experience with
  - time systems, streaming, or
  - latency networking.
• Mastery of profiling, debugging, and performance optimisation tools (Perfetto, Instruments, Systrace, etc. ).
• Strong understanding of networking, concurrency, security, and
  - level behaviour on mobile.
• Comfort with NDK/C++ integrations, JNI, or Metal where required for performance or
  - level system access.
• Excellent communication skills — you can engage confidently with customers and internal stakeholders to deliver the best outcomes.
• Preference for candidates in US time zones, but open globally for the right person.

Tech Stack:

• Android: Kotlin, Jetpack Compose, Coroutines, Clean Architecture, Android Architecture Components, Hilt/Dagger, Web
  RTC, g
  RPC, Protocol Buffers, NDK/C++, Bluetooth,
  - latency networking, Gradle, Espresso, CI/CD (Git
  Hub Actions, Bitrise)
• i
  OS: Swift, Objective-C, Swift
  UI, Combine, UIKit, Core Data, AVFoundation, Web
  RTC, g
  RPC, Protocol Buffers, Metal, Bluetooth, Instruments, XCTest, CI/CD (Fastlane, Xcode Cloud, Git
  Hub Actions)

Why Join?

• Build flagship mobile experiences that power
  - scale interactions across the globe.
• Work with elite engineers who care about architecture, clean design, and measurable performance.
• Tackle hard, unsolved technical problems in
  - latency streaming, mobile systems, and secure communication.
• 100%
  - first,
  - trust culture — autonomy, mastery, and impact matter here.
• Competitive salary and benefits, plus the chance to define the mobile direction for a product used by millions.