Senior Android Engineer - Mobile Core
Senior Android Engineer - Mobile Core
Posted on :
26-06-2025
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1 Vacancy
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Job Description
Hi were Back Market.
Were here to help make tech reliable affordable and better than new. Were a global marketplace for refurbished devices helping lower our collective environmental impact by providing trustworthy affordable tech with 92% less carbon emissions than new.
Yep you read that right. Turns out refurbished tech is way better for the planet than new. In fact With every device purchased on Back Market our positive impact on the planet grows. From our Customer Care representatives to our software engineer every individual at Back Market cuts the planet and consumers a break. Our mission is simple: to do more with what we already have.
Are you ready to join us
The Mobile Core squad in Platform Tribe
At Back Market were committed to building a top-tier m-commerce app that goes beyond simply displaying products. Our goal is to deliver an advanced seamless user experience with ambitious new features for our mobile users in the years to come.
To support this the Mobile Core team focuses on improving the developer experience by providing high standards quality tooling and robust foundations from shared architecture and UI components to developer tools ensuring our app scales efficiently while making it easier for Android engineers to write consistent maintainable code.
Our second pillar is to elevate & accelerate our App Infrastructure: develop faster and more reliable CI/CD pipelines easy release process better QoS monitoring and quality & profiling.
We are a diverse team with varied cultural and professional backgrounds consisting of Senior Android and iOS Engineers alongside a Technical Lead Manager. Mobile engineers from product squads also collaborate on technical and core projects across different teams when needed.
The role & responsibilities
We are looking for a Senior Android Engineer I to contribute to the Android core foundations architecture & infrastructure stack. This role will be based in Paris with 3 days in the office 2 days remote. The engineer in this role will produce scalable libraries & frameworks elevate engineering excellence and share their knowledge within the Android Community at Back Market.
You will also contribute to the mobile engineering chapter with talented iOS & Android engineers but also with other technical leaders from other platforms (SRE Backend Frontend CyberSec Data). Whether passionate about Kotlin building advanced UI with Jetpack Compose or focused on core architecture the engineer will work efficiently and contribute collaboratively by staying open to new ideas.
Engineering Challenges & Ownership
- Consistently delivers Android code that sets the standard for quality and maintainability making the Android app scalable & accelerating product iterations
- Effectively contributing to technical initiatives to reach the Android engineering vision accountable for large team project features including ones with external dependencies.
- Ability to design code through technical conception before development ensuring robust and efficient code patterns (Kotlin Coroutines thread safety and race condition prevention)
- Curiosity and proactiveness in implementing new Kotlin and Android technologies: Compose UI (migration started in 2023) Kotlin flows and latest features announced during Google I/O.
- Build & scale our app architecture (MVVM-C or similar architectures) advocate for multi-modules and dependency injection. Understanding and applying SOLID principles while recognizing the importance of simplicity (KISS).
- Find ways to prevent regressions push for Unit Integration and UI testing by collaborating with QA & Android Engineers exploring new E2E testing practices from native to third-party solutions.
- Elevate the Android app performance with strong monitoring practices from App launch to app size memory usage and smooth UI performance (Datadog Crashlytics)
- Improve the release process with an automation mindset & practices for our CI/CD pipelines & workflows (Bitrise CI Firebase App Distribution GitHub Actions Renovate Mergify).
Youre perfect for this role if
- You are an engineer with more than 10 years of experience on Android with some apps released on the Playstore or B2B and some significant repo contributions on GitHub.
- You effectively advocate for technical initiatives to stakeholders. You are a spokesperson for the chapter/tribe and are mentoring senior engineers.
- You know how to build Kotlin-Compose applications with solid architecture (MVVM Clean Architecture modularization dependency injection...)
- You understand the SOLID principles but also acknowledge when KISS should prevail
- You know how to design your code through technical conception before development
- You know & use reactive programming (Kotlin Flow and optionally RxJava)
- You have strong experience with Jetpack libraries (Room Material etc.) and the modern Android development stack.
- Youre mindful of app security data privacy and user trust.
- You monitor and optimize performance (app startup time rendering memory usage).
- You care about accessibility localization and building inclusive experiences.
- You know how to handle the challenges of asynchronous and concurrent programming (Kotlin Coroutines with structured concurrency lifecycle scope etc)
- With the entire team you follow and maintain the app monitoring test & provide Quality of Service: KPIs defining SLOs/SLIs advanced logs crash reporting and dashboards (Datadog & Crashlytics).
- You are used to write E2E integration and unit tests and are familiar with Espresso tests flakyness and coverage (jacoco).
- You can contribute to the scale of the integration stack: Bitrise CI CI/CD automatization for apps (Crashlytics Firebase App Distribution Github Actions Renovate)
- You continually maintain technical and functional exchanges with the iOS team
- You contribute to the hiring process and help Back Market hire the best candidates
- Youre an active member of the Android community (DroidCon Meetups etc.)
- Bonus: you live for the jaw-dropping demos and surprise announcements at Google I/O
WHY SHOULD YOU JOIN US
At Back Market were committed to hiring and supporting diverse teams of people from all backgrounds experiences and perspectives its one of the reasons were such a high-scoring certified B Corp company (93.2).
No matter your role and seniority level youll enjoy impact-driven work with hands-on career development in an innovative driven and fast-paced environment with benefits to match like:
- A mission driven work environment where your day to day makes an impact on the planet. Seriously.
- Hybrid work environment with 2 remote days a week and 1 remote work week per quarter plus 3 flex days.
- Employee Resource Groups including mentorship programs comprehensive accessibility policies and cultural competency training.
At Back Market we strive to create a workplace that embodies the world were trying to change. Weve embedded our diversity equity and inclusion principles into our DNA from dedicated staff to employee resource groups to our company values.
We know that the perfect background for a role doesnt mean the perfect fit we encourage you to apply for a role even if you think you may not have all the qualifications.
If reasonable accommodations are needed for the interview process please do not hesitate to discuss this with the Talent Acquisition Team.
Required Experience:
Senior IC
Employment Type
Full-Time
Key Skills
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