Quality Engineer - Mobile Applications

Square One Resources Limited; England; Hybrid; GBP 43,000 - 57,000; Full time

Job summary

Square One Resources Limited is seeking a Quality Engineer - Mobile Applications to join a cross-functional Scrum team in a hybrid setup near Burgess Hill. The role focuses on preventing defects, automating testing and delivering high-quality mobile and API software for a global financial services client.

You will build risk-based test strategies, design automated tests for mobile apps and APIs, and integrate them into CI/CD pipelines, while promoting shared ownership of quality across engineers

Qualifications

• Experience in Quality Engineering or Software Testing in Agile.
• Willing to work on-site three days a week near Burgess Hill.
• Hands-on testing of mobile apps and backend APIs.
• Ability to develop and maintain automated test suites.
• Strong SDLC, testing principles, defect management, risk-based testing.
• Experience with source control, build tools and CI/CD pipelines.

Responsibilities

• Collaborate to define requirements, acceptance criteria and quality risks.
• Develop risk-based test strategies for functional and non-functional needs.
• Design and maintain automated tests for mobile apps, APIs and journeys.
• Integrate automated testing into CI/CD for fast feedback and reliable releases.
• Conduct exploratory, integration, regression, compatibility and usability tests.
• Validate API integrations, data flows and third-party dependencies.
• Investigate defects using logs, tests, metrics and production insights.
• Promote shift-left testing and shared quality ownership in the Scrum team.
• Contribute reusable automation frameworks and continuous improvement initiatives.
• Use AI-assisted engineering to enhance test design and productivity.

Skills

Quality engineering

Agile testing

Automated testing

CI/CD

API testing

Mobile testing

Root cause analysis

Tools

Git

CI/CD pipelines

Build tools

Job description

Quality Engineer - Mobile Applications (Engineer II)

Location: West Sussex
Working pattern: Hybrid - 3 days on-site, 2 days from home
Rate: £270 per day, Inside IR35
Contract: 6 months initially, with extension expected
Start date: November Start

The Opportunity

We are seeking an experienced Quality Engineer - Mobile Applications to join a cross-functional Scrum team developing a customer-facing travel application for a global financial services organisation.

This is an engineering-led quality role focused on preventing defects, improving customer experience and ensuring reliable software delivery through risk-based testing, automation and early identification of quality issues.

You will work closely with developers, product owners and stakeholders throughout the software development lifecycle, contributing to mobile, API and end-to-end test automation while promoting shared ownership of product quality.

Key Responsibilities

• Collaborate with engineers, product owners and stakeholders to define requirements, acceptance criteria and quality risks.
• Develop risk-based test strategies covering functional and non-functional requirements.
• Design, maintain and integrate automated tests for mobile applications, APIs and end-to-end customer journeys.
• Integrate automated testing into CI/CD pipelines to support fast feedback and reliable releases.
• Conduct exploratory, integration, regression, compatibility and usability testing across devices, operating systems and environments.
• Validate API integrations, data flows, error handling and third-party dependencies.
• Investigate defects using logs, test results, metrics and production insights.
• Promote shift-left testing, testability, peer reviews and shared quality ownership within the Scrum team.
• Contribute reusable automation frameworks, engineering standards and continuous improvement initiatives.
• Use AI-assisted engineering responsibly to enhance test design, automation and productivity.

Essential Requirements

Candidates must meet all of the following criteria:

• Quality Engineering or Software Testing experience within Agile environments.
• Based within a reasonable commuting distance of Burgess Hill and able to work on-site three days per week.
• Hands-on experience testing mobile applications and backend APIs.
• Proven ability to develop and maintain automated test suites using a modern programming language and suitable frameworks.
• Strong understanding of software development lifecycles, testing principles, defect management and risk-based testing.
• Experience with source control, build tools and CI/CD pipelines.
• Strong analytical, problem-solving and communication skills.
• Demonstrable ownership of reliability, usability, accessibility and overall product quality.

Desirable Experience

• Native or cross-platform mobile automation tools, including testing on physical devices or emulators.
• REST API automation, service virtualisation and mocking.
• Performance, security, accessibility, visual and resilience testing.
• Troubleshooting using logs, network traces, observability tools and analytics.
• Cloud-based test environments, containerised delivery or distributed systems.
• Responsible use of generative AI and intelligent automation.
• Experience in financial services, regulated industries or other high-assurance environments.

Disclaimer

Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.
Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.