Senior UI Developer

A bit about the role and what youll do

Were looking for a Senior UI Developer to take a leading role in building and evolving our operator web portal for a next-generation telecoms platform. Youll create intuitive high-performance user interfaces that power device lifecycle management at scaleworking at the intersection of frontend engineering real-time data and secure cloud integrations.

This is a high-impact role where youll shape the user experience across a complex SaaS platform collaborating closely with backend engineers and product teams to deliver seamless scalable solutions. Youll play a key role in translating sophisticated platform capabilities into elegant usable interfaces for customers.

Please note this is a remote role with attendance required at our office in Winnersh from time to time.

What youll do

What youll do

Build Modern Web Experiences

Design develop and maintain a React 18-based operator portal delivering responsive and intuitive user interfaces.

Create Reusable UI Components

Develop and maintain scalable component libraries using Ant Design ensuring consistency and reusability across the platform.

Integrate with Cloud Services

Work with AWS AppSync GraphQL APIs and Cognito authentication flows to deliver secure real-time user experiences.

Own State & Data Management

Implement efficient data-fetching and state management patterns (e.g. React Query Zustand) for real-time device data.

Drive Frontend Performance

Optimise applications for speed and scalability through code-splitting lazy loading and caching strategies.

Collaborate Across Teams

Partner with backend engineers on API design and schema evolution and contribute to UX and design discussions.

Ensure Quality & Reliability

Write robust unit and integration tests using Jest and React Testing Library and contribute to code reviews and best practices.

Champion User Experience & Accessibility

Ensure applications meet high standards for responsiveness cross-browser compatibility and accessibility.

What were looking for

Experience & Expertise

• Strong commercial experience building production-grade React applications
• Proven experience working with GraphQL APIs (AppSync Apollo or similar)
• Experience implementing authentication flows (e.g. AWS Cognito OAuth2/OIDC)
• Solid experience using TypeScript in a React codebase
• Familiarity with component libraries such as Ant Design MUI or similar

Technical Strength

• Deep understanding of React 18 (hooks context performance optimisation)
• Strong skills in TypeScript including generics and scalable typing patterns
• Experience with modern tooling such as Vite or equivalent
• Knowledge of state management patterns (React Query Zustand or similar)
• Strong CSS/SCSS skills including responsive design (flexbox grid)
• Experience with testing frameworks like Jest and React Testing Library

Nice to Have

• Experience with multi-tenant SaaS platforms at scale
• Familiarity with AWS services (AppSync Cognito S3 CloudFront)
• Understanding of web performance optimisation techniques
• Awareness of accessibility standards (WCAG)
• Experience working with design systems and UX best practices

Ways of Working

• Thrive in a fast-paced collaborative engineering environment
• Strong attention to detail and passion for building high-quality user experiences
• Comfortable working across teams and contributing to shared solutions
• Proactive organised and able to take ownership of frontend systems
• Curious and motivated to continuously improve tools patterns and practices

Qualifications :

• A degree in computer science software engineering or equivalent experience
• AWS certification is desirable but not essential

Additional Information :

What we can provide you in return for your investment...

Competitive compensation

• A base salary that reflects your expertise and impact.
• Bonus scheme to share in our success.

Financial security & wellbeing

• Immediate participation in our pension scheme.
• Private medical insurance for you and your family from day one.
• Income protection and life insurance for peace of mind.

Flexibility & work-life balance

• Remote/hybrid working arrangements to support your lifestyle.
• An open holiday policy with no upper limittake the time you need when you need it.
• Support for volunteering and causes that matter to you.

Growth & development

• Opportunities for professional development and career progression.
• Exposure and interaction with global teams.

Inclusive supportive culture

• A commitment to diversity equity and inclusion.
• A collaborative environment where your voice is valued and your wellbeing is prioritised.

Impact & purpose

• The chance to work on technology that drives global economic inclusion and makes a real difference in peoples lives.

#LI-Remote

Trustonic is an equal opportunity employer.  We do not discriminate on any grounds. We empower engage enable and value differences between people including; different races ethnicities genders ages religions disabilities and sexual orientations with differences in education backgrounds skill sets experiences and knowledge.

Remote Work :

Yes

Employment Type :

Full-time