Kotlin Software Developer Jobs (NOW HIRING)

At PAX , you’ll work alongside a collaborative, forward-thinking team in a fast-paced environment where innovation is encouraged and ideas move quickly from concept to reality.

We’re looking an Android Payment Application Developer who will be responsible for designing, developing, testing, and maintaining Android-based payment applications for PAX terminals. This role involves implementing user interfaces using Java and Kotlin, integrating with payment device APIs and peripheral hardware, processing payment transactions, and ensuring compliance with payment security requirements. The developer performs coding, debugging, testing, code reviews, documentation, and ongoing maintenance while collaborating with cross-functional teams to deliver reliable, secure, and high-quality payment solutions.

This is an onsite role in our Jacksonville, FL office working Monday-Friday, 9:00am to 6:00pm.

• Design, develop, test, debug, and maintain Android applications for payment terminals.
• Implement application features using Java, Kotlin, Android SDK, and vendor-provided payment libraries.
• Integrate with payment hardware, card readers, PIN entry devices, printers, scanners, and other POS peripherals.
• Collaborate with product managers, QA engineers, UX designers, and other developers to deliver high-quality software.
• Troubleshoot software defects, identify root causes, and implement effective solutions.
• Create and maintain technical documentation for software design, implementation, and support.
• Ensure applications meet performance, reliability, security, and maintainability requirements.

• Deliver high-quality software solutions on schedule while meeting business and technical requirements.
• Build scalable, reliable, and secure Android payment applications.
• Continuously improve application performance, stability, and user experience.
• Collaborate effectively with cross-functional and global teams to achieve project goals.
• Stay current with Android technologies, payment industry standards, and software development best practices.
• Contribute to continuous improvement of development processes, code quality, and team knowledge sharing.

• 2+ years of hands-on experience developing Android applications using Java and/or Kotlin.
• Strong knowledge of Android application architecture, Android SDK, and Android Studio.
• Experience with SQLite, RESTful APIs, and mobile application debugging.
• Experience developing payment applications, POS systems is highly preferred.
• Knowledge of EMV and payment industry standards is a plus
• Understanding of software development best practices, including version control, code reviews, and testing.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent verbal and written communication skills.
• Ability to work effectively in a collaborative, cross-functional, and global team environment.
• Bachelor’s degree in computer science, Software Engineering, or a related field, or equivalent professional experience.
• Mandarin language proficiency is a plus.

PAX Technology is redefining the future of payments—and we’re looking for bold thinkers, builders, and innovators to join us.

As a global leader in payment solutions, we power millions of devices across 120+ countries, helping businesses deliver faster, smarter, and more seamless commerce experiences.

We’re not just building hardware—we’re building solutions. With a dynamic ecosystem of partners, cutting-edge technology, and a relentless focus on innovation, we’re transforming what’s possible in payments. If you’re ready to make an impact in a fast-moving, global tech environment, we want to hear from you.

What can PAX do for you?

We offer comprehensive benefits packages including:

• Medical, dental, vision, life, and AD&D insurance
• 401(k) Plan with employer match
• Paid vacation and paid holidays
• Tuition and professional certification reimbursement
• Internal employee recognition and rewards
• Quarterly stipend for team building activities

Ready to make an impact? Apply now and be part of what’s next in payments.

PAX is an equal opportunity employer. All qualified applicants will receive consideration without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other protected characteristics. This policy applies to all terms and conditions of recruitment and employment.