Android Engineer, Point-of-Sale

Flatpay ApS; Herlev Kommune; On-site; DKK 650,000 - 900,000; Full time

Job summary

Flatpay ApS in Denmark is seeking an experienced Android Engineer to help scale our POS platform. You’ll lead features across Kotlin/Compose, collaborate with Product and Design, and own meaningful parts of the product from design to deployment.

Ideal candidates have 2–5 years of software engineering experience, strong knowledge of distributed systems, testing and modern tooling, and a collaborative, proactive mindset in a fast-growing fintech environment.

Qualifications

• 2–5 years of professional software engineering experience.
• Experience designing and operating distributed systems.
• Comfortable with modern software engineering practices, including testing and version control.
• Curious, pragmatic, and eager to learn new technologies.
• Strong communication skills and a willingness to take ownership of your work.
• Collaborative mindset and willingness to challenge ideas constructively.

Responsibilities

• Designing, building and evolving features across our POS 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 and payment terminals, using 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.
• Contribute to testing, operations and a collaborative team culture.

Skills

Software engineering

Distributed systems

Testing

Version control

Communication

Ownership

Collaboration

Payments/Fintech

Tools

Kotlin

Android

Java

Jetpack Compose

MVVM

Dagger Hilt

Room

DataStore

Retrofit

AWS MQTT

JUnit

Espresso

Robolectric

GitHub Actions

Job description

About the job

Flatpay has become one of Europe's fastest-growing payment companies by helping merchants accept card payments in-store.

Our Point of Sale system serves as the central engine of the business. It streamlines the merchant's entire workflow — from order taking, product and inventory management, to payment processing, reporting, and compliance.

Some of the core capabilities include:

• Product catalogue:Organizes how they manage their products, categories, modifiers and inventory

• Order management: Basket, pricing, discounts, payments and managing tables and long-running orders among groups of customers.

• Hardware integrationsto barcode scanners, receipt and kitchen/bar printers and our different Mobile-, Premium- and Basic POS devices. No least manage synchronicity across multiple POS systems at shared locations in realtime.

• Our reporting suiteensures cash management, end-of-day reports, various sales, turnover, staff, tax and compliance reports that enables merchants to optimize their business and comply with local tax regulations.

As our merchants grow, so does the platform. Every new market introduces new payment methods, fiscal requirements and merchant needs. Every new feature increases the depth and complexity of the product. And with our customer base doubling approximately every six months, the demands on scalability, reliability and performance continue to grow.

This is a hands‑on engineering role with significant ownership. You'll influence technical direction, contribute to architectural decisions and solve the engineering challenges that come with building one of Europe's fastest-growing commerce platforms.

What you’ll do

As an Android Engineer, you’ll contribute far beyond implementation. You’ll help shape technical direction while remaining deeply involved in building products. You’ll work closely with Product, Design and fellow engineers to build software that scales across all dimensions: more merchants, more markets, more capabilities and increasingly sophisticated workflows.

Your responsibilities will include:

• 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

• Continuously improving our engineering practices, tooling and development experience

• Contribute to testing, operational excellence and contribute to a collaborative team culture

Who you are

We’re looking for experienced engineers who enjoy solving difficult problems and helping others succeed.

You likely bring:

• 2-5 years of professional software engineering experience

• Experience designing and operating distributed systems

• Comfortable working with modern software engineering practices, including testing and version control

• Curious, pragmatic, and eager to learn new technologies

• Strong communication skills and a willingness to take ownership of your work

• A collaborative mindset and a willingness to challenge ideas constructively

• A self-starter that gets your jobs done independently or actively seeks help if needed

• Experience within payments, fintech, e-commerce, SaaS, or high‑scale transaction systems is a plus

You’ll be working with the following technologies; we don’t expect experience with every technology listed; we’re looking for engineers who can learn quickly and help us build great products.

• Kotlin, Android, Java

• Jetpack Compose, MVVM

• Dagger Hilt, Room, DataStore

• Retrofit, AWS MQTT

• JUnit, Espresso, Robolectric

• CI/CD with GitHub Actions

• Targeting hardware such as scanners, printers & payment terminals

Why Flatpay?

As part of our team, you’ll join +2000 passionate Flatpayers dedicated to shaping the future of payments.

Flatpay is proud to be a company that values diversity. We ensure an inclusive work environment for all our employees and offer opportunities for professional growth and development. We have free slushice, an on‑site gym, a fully equipped gamer room, and plenty of other fun things at our office! If you are ready to be part of this exciting journey, we would love to hear from you today. Let’s shape the future together!