Senior Android Engineer

Chroma Recruitment; Manchester; Hybrid; GBP 96,000 - 125,000; Full time

Job summary

Chroma Recruitment is seeking a Senior Android Engineer (Contractor) to work from Manchester city centre with a hybrid pattern: 2 days onsite and 3 days remote. You will join a fast-moving team delivering a major customer proposition, focusing on Kotlin, Jetpack Compose, and modern Android architecture.

The role targets a strong engineer capable of designing, building, testing, and refining Android experiences, while contributing to a design system and reusable components.

Qualifications

• Strong commercial Android development experience, Senior Engineer level or above.
• Excellent Kotlin knowledge and modern Android practices.
• Experience with multi-module clean architecture.
• Proficient in Jetpack Compose for UI.
• Experience with automated testing and API integration.

Responsibilities

• Design and build Android experiences for a new customer-facing proposition.
• Evolve a reusable UI components library and patterns.
• Improve test suites and remove brittle tests to boost release confidence.
• Address technical debt and simplify the application where possible.
• Contribute to architecture, performance, and coding standards.

Skills

Kotlin

Android Development

Multi-module Architecture

Testing (JUnit/Espresso)

Design Systems

Tools

Jetpack Compose

Retrofit/OkHttp

GitHub Actions

CI/CD

JUnit

MockK

Job description

Senior Android Engineer (Contractor)

Location: Manchester city centre, 2 days/week onsite + remote 3 days/week

Contract: Initial 3-4 month contract (strong likelihood of extension)

Rate: £(Apply online only) (Outside IR35)

Start Date: Early October

Overview

Are you looking to make a genuine, visible impact in a short window rather than settle into a long slow ramp-up? This role offers exactly that.

Key Responsibilities

• Design and build Android experiences to support a significant new customer-facing proposition.
• Help establish and evolve a dedicated design system of reusable UI components and patterns.
• Review and improve the automated test suite — remove brittle or low-value tests, raise confidence in releases.
• Identify and address technical debt, improving maintainability and simplifying the application where appropriate.
• Contribute to architecture, coding standards, performance and modern Android engineering practices.
• Integrate the app with backend APIs and services.
• Work closely with product, design and QA colleagues to deliver changes safely and iteratively.

Requirements

• Strong commercial Android development experience, ideally at Senior Engineer level or above.
• Excellent Kotlin knowledge.
• Strong knowledge of modern Android development practices and architecture, including multi-module clean architecture.
• Experience building modern Android user interfaces, ideally using Jetpack Compose.
• Experience creating or contributing to reusable component libraries or design systems.
• Strong experience with automated testing, including improving and maintaining existing test suites (JUnit, MockK, Espresso, Compose UI Testing or equivalent).
• Experience integrating mobile applications with backend APIs and services (Retrofit/OkHttp or equivalent).
• Strong understanding of maintainability, performance and application quality.
• Comfortable working within an existing codebase and making pragmatic, incremental improvements.
• Able to work independently while collaborating closely with an established engineering team.
• Strong communication skills and a collaborative approach to solving problems.

Desirable

• Experience delivering complex customer-facing propositions on a consumer app with a significant production user base.
• Experience with high-volume transactional or membership-based mobile experiences.
• Experience with CI/CD and automated Android release pipelines (GitHub Actions or equivalent).
• Experience with mobile observability, crash monitoring and performance optimisation (Firebase, Datadog or equivalent).
• Familiarity with dependency injection frameworks (Koin, Hilt or equivalent) and Kotlin Coroutines.

Why Join?

• Genuine, hands-on delivery ownership — not a ticket-taking role.
• A tangible, visible contribution to a major new customer proposition within a short engagement.
• Work within a modern, Compose-only, multi-module codebase with strong existing engineering conventions.
• Close collaboration with an established, high-calibre permanent engineering team.
• Strong likelihood of extension beyond the initial term for the right candidate.