Senior Android Engineer — POS Platform & Payments

Flatpay; København; On-site; DKK 800,000 - 1,100,000; Full time

Job summary

Flatpay is expanding its Barcelona/Denmark-based fintech team, seeking an experienced Senior Android Engineer to shape the Android POS platform. You’ll lead cross-functional initiatives, collaborate with Product and Design, and own features from conception to production.

You’ll ensure scalable, reliable integrations with printers, payment terminals, and real-time AWS MQTT communication. You’ll bring 7+ years of software engineering, strong distributed-systems experience, and a hands-on approach

Qualifications

• 7+ years of professional software engineering experience.
• Strong experience designing and operating distributed systems.
• Demonstrated ability to lead technical projects involving multiple engineers and influence architectural decisions.
• Comfortable navigating ambiguity and shaping new products and systems.
• Ability to break down complex problems into pragmatic, maintainable solutions.
• Strong communication and collaboration skills.
• Experience building scalable backend platforms and APIs.
• Continuously improve CI/CD pipelines.
• Contribute to testing, operational excellence and a collaborative team culture.
• Experience within payments, fintech, e-commerce, SaaS, or high-scale transaction systems is a plus

Responsibilities

• Designing, building and evolving features across our Point of Sale platform platform.
• Lead feature and platform initiatives involving multiple engineers, driving delivery from discovery through production
• Build and maintain features in the Android POS platform in Kotlin/Compose that connects to printers, payment terminals and utilizes real–time communication via AWS MQTT.
• Take ownership of features from design and implementation through deployment and maintenance
• Drive architectural decisions and long-term technical improvements
• Improve reliability, observability, performance, and security across the platform
• Mentor engineers through coaching, code reviews, and knowledge sharing
• Continuously improving our engineering practices, tooling and development experience
• Contribute to testing, operational excellence and contribute to a collaborative team culture

Skills

Distributed systems

Technical leadership

Communication

Problem solving

CI/CD

API design

Collaboration

Payments fintech

Android development

Tools

Kotlin

Android

Java

Jetpack Compose

MVVM

Dagger Hilt

Room

DataStore

Retrofit

AWS MQTT

JUnit

Espresso

Robolectric

GitHub Actions

Job description

Flatpay is expanding its Barcelona/Denmark-based fintech team, seeking an experienced Senior Android Engineer to shape the Android POS platform. You’ll lead cross-functional initiatives, collaborate with Product and Design, and own features from conception to production.

You’ll ensure scalable, reliable integrations with printers, payment terminals, and real-time AWS MQTT communication. You’ll bring 7+ years of software engineering, strong distributed-systems experience, and a hands-on approach