Senior Android Engineer

Navan; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Navan is seeking a Senior Android Engineer to design, build, and enhance our mobile applications in the business expense management space. You will collaborate with an international team of engineers and domain experts to deliver high-quality features, lead complex projects, and set technical direction for our Android platform.

Responsibilities include driving architectural choices, mentoring teammates, and ensuring robust testing with CI/CD pipelines.

Qualifications

• 5+ years of experience developing high-quality Android applications.
• Strong understanding of the full app development lifecycle.
• Proficiency in Kotlin and building user interfaces with Jetpack Compose.
• Solid understanding of the Android SDK: App components, OS lifecycle, performance tuning, Gradle builds.
• Strong understanding of concurrency practices and experience with coroutines; MVVM and multi-tier architectures.

Responsibilities

• Design, build, and ship Android features in a large production app.
• Contribute to Android infrastructure for fast and reliable delivery.
• Review code, mentor developers, and write technical documentation.
• Lead development initiatives and set technical direction.
• Make architectural decisions based on data and requirements.
• Triage product and application issues and respond to problems promptly.

Skills

Android development

Kotlin

Jetpack Compose

MVVM

Android SDK

Coroutines

Architecture decisions

Education

Bachelor's degree in Computer Science or related field

Tools

Dagger/Hilt

OkHttp/ Retrofit

Espresso

CI/CD

Testing automation

Job description

Navan is looking for a Senior Android Engineer to design, build, and enhance our mobile applications in the business expense management space.

As a key contributor, you will work closely with our international team of engineers and domain experts to build new features and improve our product. We are looking for engineers who can deliver high-quality work, can lead complex projects and contribute to clear technical direction.

Required Qualifications

• 5+ years of experience developing high-quality Android applications.
• Strong understanding of the full app development lifecycle.
• Proficiency in Kotlin and building user interfaces with Jetpack Compose.
• Solid understanding of the Android SDK:
  • App components (Activities, Services, receivers, providers) and how they fit together.
  • How the Android applications you develop fit into the Android OS lifecycle: notifications, deep links, battery modes, network state, persisting data, and permissions.
  • Performance tuning and optimization.
  • Gradle builds and modules.
• Strong understanding of concurrency practices and experience working with coroutines;
• Must be capable of making architectural judgment calls based on real data and requirements.
• Working knowledge of MVVM and standard multi-tier architecture.

Preferred Qualifications

• Bachelor's degree in Computer Science or a related technical field.
• Experience with CI/CD, automated testing, and publishing to the Play Store.
• Solid foundation in data structures and algorithms, with a focus on delivering testable, scalable, and maintainable code.
• Experience using AI / LLM tools in day-to-day development, including how to keep quality, review standards, and security intact when you use them.
• Experience with modern Android frameworks such as Dagger/Hilt and OkHttp/Retrofit,
• Experience building automated test suites with Espresso/kakao and a clear view of what belongs in unit, integration, and UI tests.
• Familiarity with:
  • Accessibility best practices for mobile applications.
  • OAuth, mobile app authentication, and data safety.
  • Material Design principles, mobile UX practices, and patterns.

What You Will Do

• Design, build, and ship Android features in a large production app;
• Contribute to Android infrastructure so delivery stays fast and reliable.
• Review code, give feedback to other developers, and write technical documentation to improve coding practices and code quality.
• Lead development initiatives, whether by introducing new technologies or by raising the bar for existing code, practices, or architecture.
• Take part in decisions with peers and stakeholders on technology, design, and product direction.
• Triage product and application issues, and respond quickly to customer problems.

Navan uses AI-assisted Automated Employment Decision Tool (Metaview) to assist with evaluating resumes against job qualifications for this role. All final decisions are made by human recruiters and hiring managers.

Human oversight: Metaview does not automatically reject candidates or make final hiring decisions. Our recruiters and hiring managers review all outputs and make the final hiring decision regarding every application.

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