Mobile Engineer (Android)

Teya; Greater London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A payment software company in London is seeking an experienced Android Developer to join their team. The successful candidate will help build and maintain the Point of Sale application used by small and medium businesses globally. Responsibilities include developing features in Kotlin, integrating payment systems, and refactoring legacy components. Ideal applicants will have over 5 years of Android development experience, a strong understanding of Clean Architecture, and familiarity with Kotlin Coroutines and RxJava.

Benefits

Continuous learning opportunities

Supportive community

Comprehensive benefits

Qualifications

• 5+ years of Android development experience.
• 3+ years working on a large-scale application within a team.

Responsibilities

• Develop and maintain Android features in Kotlin using Clean Architecture.
• Apply MVVM/MVI design patterns across multi-module projects.
• Integrate with REST APIs, payment SDKs, and hardware.

Skills

Kotlin

RxJava 2

SQLite

Clean Architecture

MVVM

Tools

Dagger2

Room

REST API

Job description

Hello! We're Teya.

Teya is a payment and software service provider, headquartered in London serving small, local businesses across Europe. Founded in 2019, we build easy to use, integrated tools that enable our members to accept payments and boost business performance.

At Teya we believe small, local businesses are the lifeblood of our communities.

We’re here because we don’t believe there’s a level playing field that gives small businesses with a fighting chance against the giants of the high street.

We’re here because we see banks and legacy service providers making things harder for them. We don’t think the best technology or the best service should be reserved for those with the biggest headquarters.

We’re here to fight for a future where small, local businesses can thrive, and to commit the same dedication they offer all of us.

Become a part of our story.

We’re looking for exceptional talent to join our mission. We offer a chance to create impact in a high-energy and connected culture, while benefiting from continuous learning opportunities, a supportive community which is proud to serve our mission, and comprehensive benefits.

Your Mission

We’re seeking an experienced Android Developer to help build and maintain our Point of Sale (POS) application as well as other related applications, used by small and medium businesses worldwide.

You’ll work on payment processing, inventory management, hardware integrations, refactoring, and ensure the app is robust, scalable, and production-ready.

What You’ll Do:

• Develop and maintain Android features in Kotlin using Clean Architecture

• Apply MVVM/MVI design patterns across multi-module projects

• Integrate with REST APIs, payment SDKs, and hardware (printers, scanners, terminals)

• Build and maintain SQLite databases with ORM solutions (schema migrations, tuning, indices)

• Support multithreading and async flows with Kotlin Coroutines and RxJava

• Write unit and integration tests to ensure reliability

• Contribute to refactoring legacy components into modular, testable structures

• Support gradual migration from XML UIs to Jetpack Compose

• Work closely with product teams to anticipate side effects, improve maintainability, and ensure observability (logs, metrics, diagnostics)

Your Story

Core Experience

• 5+ years of Android development

• 3+ years working on a large-scale application within a team

Technical Skills

• Kotlin

• Clean Architecture, domain-driven design, and modularization

• MVP, MVVM, MVI patterns

• RxJava 2 and Kotlin Coroutines

• SQLite with ORM tools (Requery, Room, or similar)

• Dependency injection mainly with Dagger2.

• REST API integration

• Strong testing & refactoring background

Nice to Have

• Jetpack Compose UI

• Firebase services

• Payment SDKs (SumUp, Zettle, PAX terminals)

• Gradle Kotlin DSL

• Fintech domain experience.

• Experience working with non-Google Play services devices.

Teya is proud to be an equal opportunity employer.

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. We believe that a diverse team leads to better ideas, stronger outcomes, and a more supportive workplace for all.

If you require any reasonable adjustments at any stage of the recruitment process whether for interviews, assessments, or other parts of the application—we encourage you to let us know. We are committed to ensuring that every candidate has a fair and accessible experience with us.