Senior Android Engineer - Fintech Platform

InPost UK; Województwo mazowieckie; Hybrid; PLN 200,000 - 320,000; Full time

Job summary

InPost UK is seeking an experienced Android Engineer to own the native Android platform for our FinTech Platform, shaping architecture, quality, and delivery across a diverse device landscape. Join a lean, AI-native engineering team in Poland with hybrid work (1 day weekly in Warsaw or Kraków), focusing on performance, security, testing, and end-to-end product outcomes for consumer and merchant apps.

You will collaborate with backend and product teams, contribute to PRD and release processes,

Job description

Senior Android Engineer - Fintech Platform

• Full-time

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.

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.

Responsibilities

• 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.

Benefits

• Opportunity to work in adiverse,international, andcross‑functional environment,along with leadingexperts.
• 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 arange of benefitsfor people and investing in providingtraining opportunitiesfor 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