Senior Android Engineer - Fintech Platform

Company Description

InPost Pay is building its own fintech platform from the ground up. It’s a large-scale, international initiative where engineers will have the opportunity to shape the architecture, build core fintech components, and create solutions designed to operate at InPost’s scale.

We’re building a lean, highly effective engineering organization in Poland, with AI-native engineering at its core . We’re looking for strong engineers who are comfortable with agentic engineering, from experienced professionals building complex systems and engineering tooling to a new generation of engineers who have embraced AI-driven development from the start of their careers.

→ Hybrid working model: preferably 1 day per week in the Warsaw or Cracow office .

Job Description

We are looking for an experienced Android Engineer to join our FinTech Platform team. You will take end-to-end ownership of the native Android platform, including its architecture, quality, performance, and delivery across a diverse Android device landscape.

This role combines deep Android engineering expertise with a strong product mindset. You will be accountable not only for platform health, but also for the business outcomes and user experience of the consumer and merchant-facing solutions you build.

- Own the architecture of a production FinTech Android application, including layered architectural patterns, module boundaries, and the Gradle build structure.
- Develop and maintain native Android solutions using Kotlin, Jetpack Compose, and the View system.
- Implement reliable concurrency and state management using Kotlin Coroutines and Flow.
- Work with local persistence and security solutions such as Room, EncryptedSharedPreferences, and Android Keystore.
- Contribute throughout the development lifecycle, including PRD authorship, specification writing, testing, feature-flagged releases, and structured event emission.
- Build and maintain automated tests using JUnit, Espresso, and Compose Testing.
- Profile and improve application performance using Android Profiler and Perfetto, with a focus on CPU usage, memory, and UI performance.
- Maintain a zero-regression approach by monitoring crashes and ANRs through tools such as Crashlytics.
- Support CI/CD automation using Gradle, GitHub Actions, or equivalent solutions.
- Own integrations between native and web-based experiences, including WebView, Custom Tabs, App Links, and deep linking.
- Co-own the team backlog with Engineering and Product Managers, bringing Android constraints and native solution proposals into requirement shaping.
- Collaborate with backend engineers on API contracts, authentication flows, and event schemas.
- Participate in production incident support and post-mortem activities when required

Qualifications

- At least 5 years of experience in native Android engineering, including production applications published through Google Play.
- At least 4 years of experience working with Kotlin and Jetpack Compose and/or the Android View system.
- At least 3 years of experience with Android testing using JUnit, Espresso, and Compose Testing.
- Strong command of Kotlin, including Coroutines, Flow, sealed classes, and extension functions.
- Production-level experience with Jetpack Compose and the View system.
- Knowledge of Clean Architecture, MVVM, and/or MVI, with a strong understanding of module and layer boundaries.
- Experience with Hilt or Dagger 2, including component lifecycle and scope management.
- Experience with Room, EncryptedSharedPreferences, and Android Keystore.
- Knowledge of Retrofit and OkHttp, including certificate pinning and structured error handling.
- Experience with Android performance profiling using Android Profiler and Perfetto.
- Experience with Gradle-based CI/CD and automated signing and delivery processes.
- Ability to read and work with Java in legacy systems and third-party SDK integrations.
- Experience integrating feature flags and structured events at the mobile layer.
- English at a minimum B2 level .
- A university degree in Information Technology, Computer Science, or a related field.

Nice to have

- At least 2 years of experience in FinTech or regulated mobile application development.
- Experience with Google Pay or Android payment APIs.
- Experience with modular Android applications at a multi-module scale.
- Knowledge of Instant Apps.
- Experience implementing WCAG or Android accessibility standards in production applications.
- Familiarity with KSP, KAPT, custom Gradle plugins, or Gradle convention plugins.

Additional Information

- Opportunity to work in a  diverse ,  international , and  cross-functional environment,  along with leading  experts . 
- You work and learn from a senior leader and their leadership team, expanding your experience and exposure in the e-commerce and logistics industries. 
- InPost is a growing company that offers its people an increasing number of opportunities in several locations in Europe. 
- Fulfilling careers with a  range of benefits  for people and investing in providing  training opportunities  for their development. 
- You will feel a part of the InPost community that makes an impact on sustainability, convenient deliveries, and the circular economy every day. 
- Excellent working environment and flexible hours
- We offer B2B type of contract