Senior Mobile App Developer (Android)

Exadel
Poland

Who this role is best for

Geared toward senior Android developers comfortable with architectural transformation and cross-platform initiatives, working in a collaborative, fast-paced environment in Poland.

Best fit for

  • Candidates with experience in mobile architecture transformation and Kotlin Multiplatform projects
    — “previous involvement in architectural decisions or initiatives is a strong plus”
  • Developers who have led or contributed to large-scale enterprise mobile applications
    — “Design, develop, and maintain high-quality native Android applications”
  • Individuals who thrive in cross-functional, collaborative tech environments
    — “Collaborate closely with iOS, Backend, and cross-functional teams”

Things to consider

  • The role likely requires a long-term commitment due to the scale of transformation projects
    — “major transformation of client-facing mobile applications”
  • Candidates must be fluent in English for communication and documentation purposes
    — “English Level Upper-intermediate”

How to stand out

  • Highlight experience with Jetpack Compose and Coroutines in your resume and interviews
    — “Experience with modern Android development, including Jetpack Compose and Coroutines”
  • Showcase your ability to design and implement scalable, testable mobile solutions
    — “Design and implement scalable, maintainable, and testable mobile solutions”
  • Demonstrate your involvement in architecture decisions, not just implementation
    — “Experience contributing to mobile architecture design and improvements”
  • Emphasize your hands-on testing experience with Espresso, Robolectric, and JUnit
    — “Experience with unit, integration, and UI testing”
  • Mention your willingness and prior experience with Kotlin Multiplatform (KMP)
    — “Openness and willingness to work with Kotlin Multiplatform (KMP)”
Pace · SteadyCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • high-quality native Android applications
  • scalable and maintainable mobile solutions
  • optimized application performance
Typical background
software developmentmobile developmentbackend technologies

Skills & requirements

Required

Android DevelopmentKotlinJetpack ComposeCoroutinesMVVMClean ArchitectureREST ApisGraphQLFirebaseDagger/hiltEspressoJunit

Preferred

Kotlin MultiplatformGraphQLREST API IntegrationsFirebase ToolsUi/ux PrinciplesMobile Accessibility

Stack & domain

KotlinAndroid DevelopmentJetpack ComposeCoroutinesMVVMClean ArchitectureKotlin Multiplatform (kmp)GraphQLREST ApisFirebase Remote ConfigCrashlyticsDagger/hiltEspressoRobolectricJunitGitlab Ci/cdFastlaneCommunicationCollaborationMentorshipTechnical DocumentationDevelopment Best PracticesTransportation TechnologyRail Operations

About the role

Original posting from Exadel via Greenhouse

Why Join Exadel

We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.

From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.

What powers it all? Our people are ambitious, collaborative, and constantly evolving.

About the Client  

An international transportation technology company focused on building scalable digital solutions for modern rail operations. The organization develops internal platforms and automation tools that improve operational efficiency, support business growth, and streamline complex processes in a fast-paced environment. 

Tech Stack

Kotlin, Native Android Development, Jetpack Compose, Coroutines, MVVM, Clean Architecture, Kotlin Multiplatform (KMP), GraphQL, REST APIs, Firebase Remote Config, Crashlytics, Dagger/Hilt, Espresso, Robolectric, JUnit, GitLab CI/CD, Fastlane

What You’ll Do

Design, develop, and maintain high-quality native Android applications

Contribute to the architectural foundations of a major transformation of client-facing mobile applications

Design and implement scalable, maintainable, and testable mobile solutions

Drive technical improvements and contribute to architecture decisions

Collaborate closely with iOS, Backend, and cross-functional teams

Explore and contribute to Kotlin Multiplatform initiatives

Optimize application performance, scalability, and user experience

Ensure high engineering quality through testing and code reviews

Mentor and support other engineers within the team

Contribute to technical documentation and development best practices

What You Bring

Strong senior-level expertise in native Android development and Kotlin

Experience with modern Android development, including Jetpack Compose and Coroutines

Strong understanding of clean, scalable, and testable mobile architecture principles

Experience contributing to mobile architecture design and improvements; previous involvement in architectural decisions or initiatives is a strong plus

Experience with unit, integration, and UI testing

Openness and willingness to work with Kotlin Multiplatform (KMP)

Interest in backend technologies and understanding how mobile applications interact with backend service

Strong communication and collaboration skills

Experience working in Agile environments

Nice to have

Hands-on experience with Kotlin Multiplatform (KMP)

Previous involvement in mobile architecture design or transformation projects

Experience with GraphQL or REST API integrations

Knowledge of Firebase tools and mobile analytics

Understanding of UI/UX principles and mobile accessibility

English Level

Upper-intermediate

Legal & Hiring Information

Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more.

Reasonable accommodations are available to enable individuals with disabilities to perform essential functions.

Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs.

Compensation details are shared with candidates at the early stage of the recruitment process.

The offer is not binding until a signed contract is in place.

Your Benefits at Exadel 

Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.

International projects

In-office, hybrid, or remote flexibility

Medical healthcare

Recognition program

Ongoing learning & reimbursement 

Well-being program

Team events & local benefits 

Sports compensation 

Referral bonuses 

Top-tier equipment provision

Exadel Culture

We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.

Source: Exadel careers (Greenhouse)

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