278 Ui Developer jobs in the United Kingdom

Frontend Developer – Key Skills & Competencies

End-to-End Development: Hands-on experience taking applications from concept to implementation, delivering high-quality, user-focused solutions.

Core Frontend Skills: Proficient in TypeScript, React, HTML5, and CSS3, with the ability to build scalable, maintainable, and performant interfaces.

Testing & Quality Assurance: Experience with Jest and related testing practices to ensure reliable and well-tested codebases.

Security & Best Practices: Strong understanding of frontend security principles and safe coding practices.

Accessibility & Inclusive Design: Skilled in applying WCAG, ARIA, and accessibility best practices to create inclusive digital experiences.

Responsive Design: Expertise in building cross-platform, responsive interfaces that work seamlessly across devices and browsers.

Tooling & Package Management: Proficient with NPM and modern build workflows.

Agile Practices: Familiarity with the Software Development Life Cycle (SDLC) and working in Agile environments for iterative delivery.

Low-Code/No-Code: Ability to leverage low-code and no-code solutions where appropriate to accelerate delivery.

Nice to Have

Exposure to agentic AI, including experience with LLMs, MCP servers, LangChain, and prompt engineering.

To apply, please submit your CV and daily rate expectation by clicking on the relevant links. If successful you will be contacted by one of our consultants within 3 working days. Unfortunately, due to the volume of applications we expect to receive for this Lab Supervisor role, if you do not hear from us within this time you should presume your application has been unsuccessful on this occasion.

Grassroots Recruitment is acting as a recruitment agency and a recruitment business in respect of this contract vacancy. Grassroots Recruitment is an equal opportunities employer and recruiter. We welcome applications from all sections of the community, regardless of age, race, sex, sexual orientation, marital status, religion or disability

Frontend Developer – Key Skills & Competencies

End-to-End Development: Hands-on experience taking applications from concept to implementation, delivering high-quality, user-focused solutions.

Core Frontend Skills: Proficient in TypeScript, React, HTML5, and CSS3, with the ability to build scalable, maintainable, and performant interfaces.

Testing & Quality Assurance: Experience with Jest and related testing practices to ensure reliable and well-tested codebases.

Security & Best Practices: Strong understanding of frontend security principles and safe coding practices.

Accessibility & Inclusive Design: Skilled in applying WCAG, ARIA, and accessibility best practices to create inclusive digital experiences.

Responsive Design: Expertise in building cross-platform, responsive interfaces that work seamlessly across devices and browsers.

Tooling & Package Management: Proficient with NPM and modern build workflows.

Agile Practices: Familiarity with the Software Development Life Cycle (SDLC) and working in Agile environments for iterative delivery.

Low-Code/No-Code: Ability to leverage low-code and no-code solutions where appropriate to accelerate delivery.

Nice to Have

Exposure to agentic AI, including experience with LLMs, MCP servers, LangChain, and prompt engineering.

To apply, please submit your CV and daily rate expectation by clicking on the relevant links. If successful you will be contacted by one of our consultants within 3 working days. Unfortunately, due to the volume of applications we expect to receive for this Lab Supervisor role, if you do not hear from us within this time you should presume your application has been unsuccessful on this occasion.

Grassroots Recruitment is acting as a recruitment agency and a recruitment business in respect of this contract vacancy. Grassroots Recruitment is an equal opportunities employer and recruiter. We welcome applications from all sections of the community, regardless of age, race, sex, sexual orientation, marital status, religion or disability

• Build tools and visualisations that support the Substation360 platform including dashboards, alerts and user insights.
• Lead by example within the team, offering technical mentoring and guidance to less experienced developers.
• Actively participate in Agile development practices (e.g. sprint planning, retrospectives).
• Ensure all software delivered adheres to coding and quality standards and take part in peer code reviews.
• Contribute to the deployment and orchestration of services including containerisation in platforms like Kubernetes.

• A degree in Software Engineering, Computer Science, Electronics or equivalent working experience.
• Strong proficiency in front-end technologies such as Javascript, Typescript and React.
• Demonstrated ability to design and develop intuitive, performant and secure user interfaces.
• Familiarity with source control systems, branching strategies and release processes.
• Good understanding of modern frontend architecture patterns and component-driven design (e.g. reusable components, hooks, state management).
• Strong grasp of UI/UX principles and their application in data-driven environments.
• Solid understanding of software engineering and secure coding practices.
• Knowledge of Business Intelligence (BI) and data handling in enterprise systems.
• Awareness of infrastructure and deployment decisions affecting UI behaviour and performance.
• High attention to detail and a commitment to producing high-quality, user-focused solutions.

• Up to 50,000 DOE
• Holidays: 25 days of annual leave plus bank holidays, with an extra day for every three years completed (up to a maximum of 30 days). Ability to buy an additional 5 days
• Pension contributions of 8% from the employer
• Comprehensive benefits, including Group Life Insurance, Income Protection, and Critical Illness cover
• Private Medical Insurance (single cover or cash equivalent)

Developer (UI) - Flexible Location (Home / Leamington Spa / Edinburgh)
A fast-growing digital organisation transforming financial advice with market-leading technology is looking for a talented UI Developer to join its Digital Development team.
As part of an experienced, collaborative squad, you'll build React micro-frontends in TypeScript, working on an API-first, Azure-hosted cloud platform serving both partners and internal teams. This is a hands-on coding role where you'll:

• 
  Deliver high-quality, testable React components and experiences.
• 
  Break down complex requirements into incremental, usable changes.
• 
  Work closely with Product Managers, Analysts, Architects and fellow Developers.
• 
  Contribute to standards, code reviews and continual improvement.

You'll bring:

• 
  Strong TypeScript and React skills (state management frameworks such as Redux a plus).
• 
  REST API integration, HTML/CSS and Material UI experience.
• 
  Git best practice and an understanding of CI/CD workflows.
• 
  Excellent problem-solving and communication skills.

? Why apply?
Alongside cutting-edge architecture and a culture of learning, you'll enjoy one of the best reward packages around: 40 days annual leave , 8% employer pension contribution (plus 2% matched) , discretionary bonus, private healthcare and flexible benefits.
This is a chance to shape modern financial technology, learn from a talented team, and be proud of the impact you make.

Role Name : UI Developer (Gaming)
Location :Twycross, Leicestershire
Type : Hybrid - Preferred2 to 3 days onsite per week.
Contract Duration : 18 months

Job Description :

As a Game UI Developer, you'll be part of a team of friendly, highly talented developers who like nothing better than sharing their own challenges and expertise with you. Sitting alongside fellow engineers, designers and artists, you will be responsible for helping to build the core features and components used to implement various UI designs, along with extending and developing our UI toolchain to support the current and future needs of our projects.

We're big believers in high-quality engineering, and since we're developing our products as services, we aim for fast iteration but with a focus on robust methods. This means that we embrace modern development practices such as continuous delivery, automated testing, code reviews, pair programming and agile methods.

Key Accountabilities
Deliver high-fidelity web-based solutions to support Sea of Thieves and Rare's next games.
Build creative solutions to technical problems encountered.
Continuously work to minimise technical debt and maintenance hazards.
Champion quality in our development process, demonstrating our values and taking an active role in improvement of engineering at Rare.
Be part of Rare's culture; be inquisitive, try things out, break stuff, help people be even better, think like you own the place.
Liaise with other teams, help identify technical challenges and identify core player value.

Required Skills and Experience
Experience in modern JavaScript web development.
Solid understanding of design patterns and object-oriented design.
Knowledge of CSS and preprocessors such as PostCSS.
Understanding of the complexities of working on multilingual products.
A keen eye on rendering performance, and knowledge of how to profile.
Experience in working with Typescript.
Experience in writing unit tests in Jasmine or similar.
Experience in MVC and/or MVVM design patterns.
Experience and awareness of accessibility requirements.
Experience in working with a JavaScript framework such as React, Angular, Vue, SolidJS.

Developer (UI) - Flexible Location (Home / Leamington Spa / Edinburgh)
A fast-growing digital organisation transforming financial advice with market-leading technology is looking for a talented UI Developer to join its Digital Development team.
As part of an experienced, collaborative squad, you'll build React micro-frontends in TypeScript, working on an API-first, Azure-hosted cloud platform serving both partners and internal teams. This is a hands-on coding role where you'll:

• 
  Deliver high-quality, testable React components and experiences.
• 
  Break down complex requirements into incremental, usable changes.
• 
  Work closely with Product Managers, Analysts, Architects and fellow Developers.
• 
  Contribute to standards, code reviews and continual improvement.

You'll bring:

• 
  Strong TypeScript and React skills (state management frameworks such as Redux a plus).
• 
  REST API integration, HTML/CSS and Material UI experience.
• 
  Git best practice and an understanding of CI/CD workflows.
• 
  Excellent problem-solving and communication skills.

? Why apply?
Alongside cutting-edge architecture and a culture of learning, you'll enjoy one of the best reward packages around: 40 days annual leave , 8% employer pension contribution (plus 2% matched) , discretionary bonus, private healthcare and flexible benefits.
This is a chance to shape modern financial technology, learn from a talented team, and be proud of the impact you make.

Role Name : UI Developer (Gaming)
Location :Twycross, Leicestershire
Type : Hybrid - Preferred2 to 3 days onsite per week.
Contract Duration : 18 months

Job Description :

As a Game UI Developer, you'll be part of a team of friendly, highly talented developers who like nothing better than sharing their own challenges and expertise with you. Sitting alongside fellow engineers, designers and artists, you will be responsible for helping to build the core features and components used to implement various UI designs, along with extending and developing our UI toolchain to support the current and future needs of our projects.

We're big believers in high-quality engineering, and since we're developing our products as services, we aim for fast iteration but with a focus on robust methods. This means that we embrace modern development practices such as continuous delivery, automated testing, code reviews, pair programming and agile methods.

Key Accountabilities
Deliver high-fidelity web-based solutions to support Sea of Thieves and Rare's next games.
Build creative solutions to technical problems encountered.
Continuously work to minimise technical debt and maintenance hazards.
Champion quality in our development process, demonstrating our values and taking an active role in improvement of engineering at Rare.
Be part of Rare's culture; be inquisitive, try things out, break stuff, help people be even better, think like you own the place.
Liaise with other teams, help identify technical challenges and identify core player value.

Required Skills and Experience
Experience in modern JavaScript web development.
Solid understanding of design patterns and object-oriented design.
Knowledge of CSS and preprocessors such as PostCSS.
Understanding of the complexities of working on multilingual products.
A keen eye on rendering performance, and knowledge of how to profile.
Experience in working with Typescript.
Experience in writing unit tests in Jasmine or similar.
Experience in MVC and/or MVVM design patterns.
Experience and awareness of accessibility requirements.
Experience in working with a JavaScript framework such as React, Angular, Vue, SolidJS.

Senior TypeScript UI Developer (FTC)

Salary: 65,000
Contract: 18 months
Start Date: ASAP
Location: Atherstone, Warwickshire (Hybrid, 2-3 days onsite for onboarding, then 1-2 days per month. Remote may be considered)

About the Role
We are looking for a Senior TypeScript UI Developer to join a leading games studio and contribute to high-profile, large-scale projects enjoyed by millions of players worldwide. You will work alongside engineers, designers, and artists to develop core UI features, extend the UI toolchain, and deliver performant, accessible, and visually striking interfaces.

This role is ideal for a developer with strong coding foundations who thrives in collaborative, creative environments and enjoys tackling complex technical challenges.

Key Responsibilities

• Develop high-quality, web-based UI solutions for major gaming projects.
• Collaborate with cross-functional teams to deliver engaging player experiences.
• Optimise performance, minimise technical debt, and support robust engineering practices.
• Champion quality through code reviews, testing, and modern development approaches.
• Contribute to the wider engineering culture with fresh ideas and continuous improvements.

Essential Skills & Experience

• Strong experience in modern JavaScript/TypeScript development.
• Proficiency with frameworks such as React, Angular, Vue, or similar.
• Solid understanding of design patterns, MVC/MVVM, and object-oriented design.
• Skilled in CSS (including preprocessors like PostCSS).
• Experience with accessibility requirements and multilingual product development.
• Familiarity with unit testing (e.g. Jasmine) and performance profiling.
• Strong coding background (not a design-focused role).

Why Apply?

• Contribute to major, globally recognised gaming projects.
• Work in a supportive and collaborative studio environment.
• Opportunity to combine creativity and engineering excellence in a senior-level role.

Next Steps

Apply with your latest CV or reach out to Christian at TEC Partners.

Senior TypeScript UI Developer (FTC)

Salary: 65,000
Contract: 18 months
Start Date: ASAP
Location: Atherstone, Warwickshire (Hybrid, 2-3 days onsite for onboarding, then 1-2 days per month. Remote may be considered)

About the Role
We are looking for a Senior TypeScript UI Developer to join a leading games studio and contribute to high-profile, large-scale projects enjoyed by millions of players worldwide. You will work alongside engineers, designers, and artists to develop core UI features, extend the UI toolchain, and deliver performant, accessible, and visually striking interfaces.

This role is ideal for a developer with strong coding foundations who thrives in collaborative, creative environments and enjoys tackling complex technical challenges.

Key Responsibilities

• Develop high-quality, web-based UI solutions for major gaming projects.
• Collaborate with cross-functional teams to deliver engaging player experiences.
• Optimise performance, minimise technical debt, and support robust engineering practices.
• Champion quality through code reviews, testing, and modern development approaches.
• Contribute to the wider engineering culture with fresh ideas and continuous improvements.

Essential Skills & Experience

• Strong experience in modern JavaScript/TypeScript development.
• Proficiency with frameworks such as React, Angular, Vue, or similar.
• Solid understanding of design patterns, MVC/MVVM, and object-oriented design.
• Skilled in CSS (including preprocessors like PostCSS).
• Experience with accessibility requirements and multilingual product development.
• Familiarity with unit testing (e.g. Jasmine) and performance profiling.
• Strong coding background (not a design-focused role).

Why Apply?

• Contribute to major, globally recognised gaming projects.
• Work in a supportive and collaborative studio environment.
• Opportunity to combine creativity and engineering excellence in a senior-level role.

Next Steps

Apply with your latest CV or reach out to Christian at TEC Partners.