Developer In-Test

Mitsubishi Electric – UK; Hatfield; Hybrid; GBP 55,000 - 90,000; Full time

Benefits offered by this job

Generous annual leave—25 days + bank

Flexible working from home or hybrid

Pension

Life Assurance

Private Medical/Dental

Discount platform

Cycle to Work

Job summary

Mitsubishi Electric – UK is seeking a Developer in Test to embed quality throughout the software development lifecycle. You will design, develop, and maintain automated tests for UI, APIs, and backend services and build reusable test frameworks and tooling.

You will collaborate with developers, product teams and other stakeholders to identify defects early and help deliver reliable, secure software with strong testability and design-for-test.

Qualifications

• Design, develop and maintain automated tests for UI, APIs and backend services.
• Create reusable test frameworks and tooling to promote quality.
• Collaborate with developers, product teams and stakeholders to deliver reliable software.

Responsibilities

• Embed quality throughout the software development lifecycle.
• Identify defects early and promote continuous quality.
• Contribute to test architecture decisions and testing strategies.

Skills

C#

.NET

TypeScript

xUnit

MS Test Runner

Playwright .NET

Appium

Blazor

React/Angular

NET MAUI

UI automation

API automation

CI/CD

Git workflows

AWS

Docker

SOLID

Tools

Docker

AWS

Playwright

Job description

Mitsubishi Electric is a global innovator in energy, automation and building technologies. From air conditioning and lifts to robotics and power systems that power homes and businesses across the UK. With 150,000 employees worldwide and 850 in the UK, we’re creating “Changes for the Better.” Join us to make a real impact for a smarter, sustainable future.

Want to know more about the company? Take a look here: MITSUBISHI ELECTRIC UNITED KINGDOM

Role summary:

To embed quality throughout the software development lifecycle by designing, developing, and maintaining automated test software using modern software engineering practices. The role is responsible for developing and maintaining automated tests for user interfaces (UI), APIs, and backend services and processes, as well as reusable test frameworks and tooling. Working collaboratively with developers, product teams, and other stakeholders, the Developer in Test identifies defects early, promotes continuous quality, and helps deliver reliable, secure, and high-quality software.

Skills/Responsibilities:

• Strong proficiency in C# and .NET (preferably .NET 6/10)
• Good working knowledge of TypeScript
• Experience building and maintaining automated test frameworks using: xUnit or similar, MS Test Runner, Playwright (.NET), Appium
• Experience testing applications built with: Blazor (or React/Angular), NET MAU, Minimal APIs, HTML & CSS-based web applications
• Designing scalable, maintainable UI and API automation frameworks
• Strong understanding of: SOLID principles, Testability and design-for-test
• Experience with: CI/CD pipeline integration, Test reporting and quality gates, Git-based workflows.

Experience:

• A software engineer first, with a testing specialism
• Comfortable working across UI, API, mobile, and cloud layers
• Capable of designing maintainable automation frameworks
• Able to operate independently while contributing to team-level quality strategy
• Familiar with cloud-native and event-driven architectures hosted on AWS.
• Experience contributing to test architecture decisions
• Familiarity with contract testing approaches
• Knowledge of containerisation concepts (Docker)
• Exposure to infrastructure-as-code concepts
• Experience mentoring junior testers

In return for your commitment, we will offer you some fantastic benefits:

• Generous annual leave allowance - 25 days per year, plus bank holidays increasing by one day with each year of service until 27 days per year.
• Flexible Working - we offer a range of flexible working options that include working from home or hybrid working.
• Pension.
• Life Assurance.
• Group Income Protection Scheme.
• Private Medical, Dental Insurance and a Cash Plan Scheme - Single cover funded by Mitsubishi.
• Access to Mitsubishi’s very own discount platform.
• Colleague Referral Scheme.
• Holiday Buy.
• Long Service Awards.
• Cycle to Work Scheme.
• Sports & Social Club (Recent events such as theatre trips, Ascot, Paintball, The Darts)
• Employee Assistance Programme including additional services Eldercare & Best Doctors.

Equality and Diversity

As the business environment around Mitsubishi Electric Group is rapidly changing, providing a workplace where employees can work to their full potential regardless of gender or age is essential to business development. Based on this, Mitsubishi Electric promotes employee diversity through the following measures.