Mobile Shift Engineer in London

Teya was founded on a simple belief: local businesses deserve better. They are the cafés, restaurants, salons, shops and entrepreneurs that bring character to our high streets, create jobs and keep communities moving. Yet for too long, financial services has made life harder for them - with clunky tools, poor support and complexity that gets in the way of running a business. We're building a financial platform for local businesses across Europe - one built around simple tools, thoughtful design and real human support. Our Members rely on us to help them run their business with confidence, and that responsibility shapes the way we work. We care about quality. And we believe great performance and genuine hospitality should go hand in hand.

If you want to build meaningful products, solve real problems and make a genuine difference for local businesses, we'd love to hear from you.

Your Mission

To empower small and medium-sized businesses across Europe by building and enhancing Teya's mobile applications. Deliver scalable, secure, and innovative solutions that help business owners thrive and reconnect with the joy of running their businesses.

As a Mobile Software Engineer at Teya, you will:

• Develop cross-platform mobile applications using Kotlin.
• Prioritize performance, scalability, and maintainability in all development tasks.
• Focus on delivering a modern, intuitive, and user-friendly experience for merchants across Europe.
• Actively participate in critical project decisions, including architecture design, framework selection, and tool evaluation.
• Continuously improve applications while applying automation best practices to reduce waste and error.
• Work within Agile/Scrum methodologies, ensuring timely delivery, iterative improvements, and collaboration across teams.

Key Responsibilities

• Build mobile applications that support payments acceptance, business account services, card issuing, and ePOS systems.
• Incorporate state-of-the-art technologies to enable offline capabilities, secure data storage, and dynamic app features like push notifications and deep linking.
• Collaborate with design and product teams to deliver a compelling user experience.
• Participate in daily stand-ups, sprint planning, and retrospectives as part of Agile workflows.

What you'll build

• Cross-platform payment SDKs that work seamlessly on Android and iOS.
• Device abstraction layers that enable payment processing across different hardware configurations.
• Developer tools and documentation that make payment integration simple and reliable.
• Standardized APIs that reduce complexity for third-party integrators.
• Secure, compliant payment processing components that meet industry standards.

Your Story:

• Hands-on experience developing and shipping KMP projects, including shared business logic and platform-specific implementations.
• Mobile Development: Strong background in either Android (Kotlin) or iOS development with understanding of mobile app architecture patterns.
• SDK Development: Experience building SDKs, libraries, or frameworks that other developers consume, with focus on API design and developer experience.
• Payment Technology Knowledge: Understanding of payments, NFC technology, financial transaction processing, banking.

Technical Skills

• Advanced Kotlin: Deep expertise in Kotlin language features, coroutines, and multiplatform-specific APIs.
• Cross-Platform Architecture: Experience with RESTful services, secure communication protocols, and third-party API integration.
• Testing & Quality: Strong testing practices including unit testing, integration testing, and automated testing frameworks.
• Security Awareness: Understanding of secure coding practices, especially relevant to financial/payment applications.

Preferred Qualifications

• Experience with payment processing systems, EMV standards, or financial technology.
• Knowledge of NFC technology, contactless payment protocols, or mobile payment frameworks.
• Background in modular architecture, dependency injection, and clean architecture principles.
• Experience with CI/CD pipelines and automated deployment for multi-platform projects.
• You have experience with design tools such as Figma and Canva.
• You're highly organised with strong project management skills.
• You're a great communicator and collaborator.
• You have a growth mindset with eagerness to learn and a hands-on attitude.

The Perks

• We trust you, so we offer flexible working hours, as long it suits both you and your team.
• Health Insurance.
• Meal Allowance.
• 25 days of Annual leave (+ Bank holidays).
• Frequent team events & activities in the office and outside.
• Office snacks every day.
• Friendly, comfortable and informal office environment.

We are committed to creating an inclusive environment where everyone regardless of race, ethnicity, gender identity or expression, sexual orientation, age, disability, religion, or background can thrive and do their best work.