Android POS Developer
Job Location:
Monthly Salary:
Posted on:
Vacancies:
Job Summary
Who we are
Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly simply and securely. We are the innovators at the heart of the payments technology industry shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business we are committed to helping our people accelerate their careers. Together we shape the evolution.
Long Description
Role : Android POS Developer (Kotlin & Jetpack Compose Specialist)
Experience Required: 5 Years in Android Development Reporting To: Technical Lead Role Type: Individual Contributor (IC) Mid-Level Team Member
Position Summary
We are seeking a highly skilled Android POS Developer to join our payment engineering this role you will focus on individual contribution writing high-quality production code for applications running on hardened Android OS terminals (Ingenico PAX Verifone). Working under the direction of the Technical Lead your primary strength will be top-class proficiency in Kotlin and Jetpack Compose to deliver smooth highly responsive user experiences within strict memory and security constraints. While deep payment experience is a plus you must possess the technical agility to quickly master EMV specifications and financial messaging protocols under the guidance of senior team members.
Key Responsibilities
Elite UI/UX Implementation: Own the development of terminal user interfaces using Jetpack Compose. Ensure highly optimised state management smooth transitions and minimal recompositions tailored for low-RAM hardened hardware.
High-Quality Coding: Implement business logic workflows and application features using clean maintainable and modern Kotlin syntax.
Design Execution: Take detailed Low-Level Designs (LLD) provided by the Tech Lead and translate them into performant terminal applications.
Payment Domain Integration: Utilise OEM SDKs to interface with secure hardware (card readers printers scanners). Learn and implement payment protocols (ISO 8583 nexo ep2 CTAP ISO 20022) as required by project milestones.
Secure Coding Adherence: Follow strict defensive coding practices (OWASP Mobile Top 10 PCI-DSS) to ensure no sensitive transaction or cardholder data is exposed or logged.
AI-Driven Development: Proactively use AI tools (e.g. Copilot Cursor) to accelerate feature development automate robust unit testing and maintain code documentation.
Required Technical Expertise
5 Years of Professional Android Experience: Strong foundational background in mobile software engineering using modern Android stacks.
Top-Class Kotlin & Jetpack Compose: Deep production-proven mastery of modern reactive UI paradigms Kotlin Coroutines Flow and memory management optimization.
Hardened Device Awareness: Understanding of resource-constrained development (managing application lifecycles under low-memory overhead).
Payment Domain (Good to Have / Fast Learner): Basic familiarity with or a strong desire to master EMV L2/L3 specifications ISO 8583 nexo or ep2/CTAP messaging.
Worldline Global Services Private Limited P a g e 2/2 JD Android POS Mid
Tooling: Proficiency with Git Android Studio profiling tools (for tracing memory leaks) and modern CI/CD pipelines.
Definition of Done (DoD) & Quality Standards
As a core developer in a 7-resource pod your code deliverables must meet strict quality benchmarks before being reviewed by the Tech Lead:
Memory Efficiency: UI components must pass strict RAM utilization checks on physical POS hardware.
Test Coverage: Deliver a minimum of 80% unit test coverage for all authored features using JUnit and MockK.
Security Compliance: Ensure code passes all static security analysis checks with mandatory application of ProGuard/R8 rules.
Shape the evolution
We are on an exciting journey towards the next frontiers of payments technology and we look for big thinkers people with passion can-do attitude and a hunger to learn and grow. Here youll work with ambitious colleagues from around the world take on unique challenges as a team and make a real impact on the society. With an empowering culture strong technology and extensive training opportunities we help you accelerate your career - wherever you decide to go. Join our global team of 18000 innovators and shape a tomorrow that is yours to own.
Learn more about life at Worldline at
We are proud to be an Equal Opportunity employer. We do not discriminate based upon race religion color national origin sex sexual orientation gender identity gender expression age status as an individual with a disability or any applicable legally protected characteristics.
Required Experience:
IC
About Company
Put the power of payment innovation to work with Worldline, Europe’s leading payment service provider.
