Job Description

This is a remote position.

We are looking for an experienced
Mobile Developer (Android + SDK Integration)
to join a long-term project in the payments sector. The role focuses on developing Android applications and SDKs for payment terminals, integrating third-party vendor solutions, and applying Clean Architecture, SOLID principles, and strong testing practices in a high-compliance fintech environment.
Responsibilities:
•
Develop Android applications and SDKs for payment terminals
• Integrate third-party SDKs from major terminal vendors (Pax, Ingenico, Verifone, Sunmi, Castle)
• Build responsive UIs with Jetpack Compose across varied screen sizes
• Set up and maintain CI/CD pipelines (GitHub Actions)
• Deliver internal SDKs for use across the product ecosystem
• Apply Clean/Hexagonal Architecture, SOLID principles, and design patterns
• Write unit tests and automated end-to-end test suites
• Collaborate with developers, analysts, and French stakeholders in Agile teams

Requirements

• 4+ years of commercial experience in Android development
• Strong proficiency with Kotlin (Java also accepted) and Jetpack Compose
• Experience with SDK integration (ideally in payments/fintech)
• Familiarity with Clean Architecture and SOLID principles
• CI/CD setup experience (GitHub Actions or similar)
• Testing mindset with unit and E2E automation experience
• English fluency (C1), French language a plus
Nice to have
• Experience in payments or fintech systems
• Knowledge of payment terminal providers (Pax, Ingenico, Verifone, Sunmi, Castle)
• Prior experience building SDKs for internal or external developer use
• Familiarity with mobile application security in financial services

Benefits

Solid, competitive salary
Work in multilingual, multinational and multicultural environment on international projects
Comprehensive healthcare
Long-term B2B contract with stable project pipeline
Remote working model (with possible trips to France for onboarding or workshops)

About Madiff

We are an international Innovation, IT and high-tech engineering consulting company that delivers unique value in a wide variety of industries.

Our mission is to add value to our customers businesses by providing digital and technological innovation services, delivering disruptive results and making our clients stand out in their market.

We are driven by a creative and innovative consulting approach strongly oriented to getting results. We MAKE THE DIFFERENCE.

Warsaw

Prosta 20

Wrocław

Rybacka 7

Lublin

Grottgera 2

Industry

IT & Software

Company Size

51-200 employees

Headquarters

Warszawa, PL

Year Founded

2015

Website

madiff.eu

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