Mobile Developer (Android + SDK Integration)

At Madiff, we connect top IT talent with cutting-edge companies through remote Agile teams and nearshore outsourcing. With operations in Poland, Portugal, France, and the UK, we specialize in AI, DevOps, and Cybersecurity – supporting industries like Telecom, Banking, and Hi-Tech.

Are you an experienced Android Developer passionate about SDK integration and payment technologies?

Join a fast-moving engineering team at one of France’s leading payments providers, where your work will directly impact the next generation of payment terminal software.

Key responsibilities:

• Develop Android applications and SDKs for payment terminals

• Integrate third-party SDKs from Pax, Ingenico, Verifone, Sunmi, and Castle

• Build responsive UIs with Jetpack Compose

• Maintain and optimize CI/CD pipelines (GitHub Actions)

• Deliver internal SDKs used across the company’s ecosystem

• Apply Clean/Hexagonal Architecture, SOLID principles, and design patterns

• Write and maintain unit and end-to-end test suites

• Collaborate closely with developers, analysts, and stakeholders in Agile teams

  
  

What we’re looking for:

• Minimum 4 years of commercial experience in Android development

• Strong proficiency with Kotlin (Java also accepted) and Jetpack Compose

• Hands-on experience with SDK integration (ideally in payments or fintech)

• Familiarity with Clean Architecture and SOLID principles

• CI/CD experience (preferably GitHub Actions)

• Strong testing mindset (unit and E2E)

  
  

Nice to Have

• Experience in payments or fintech systems

• Knowledge of payment terminal vendors (Pax, Ingenico, Verifone, Sunmi, Castle)

• Background in SDK development for internal or public use

• Understanding of mobile security in financial services

  
  

What we offer:

• Fully remote work from Poland, with occasional business trips to France

• Opportunity to work on innovative payment technologies with an international engineering team

• Agile working environment with direct communication and technical ownership

• Professional growth support – mentoring, training budget, and internal knowledge-sharing sessions