Trustonic are hiring a
Senior UI Developer
Company Description
Who we are...
At Trustonic, we make smartphones affordable for the many, enabling global access to devices and digital finance through the world’s most secure smartphone locking technology. We partner with mobile carriers, retailers, and financiers across 30+ countries, powering device financing solutions that drive economic inclusion, profitability, and growth.
We pride ourselves on living by the Trustonic culture code, a blueprint for our journey that recognises that great working environments don’t guarantee success, but bad ones almost always ensure failure.
Working here, you’ll find a company that celebrates its diversity and is looking to do the right thing: for each other, the community, and the planet. We believe in equal opportunities and take to heart the old African proverb ’If you only want to go fast, go alone. If you want to go far, go together’.
We work flexibly when and where we’re at our best, but regardless of how you choose to work, we’ll make sure you feel like one of the team.
Job Description
A bit about the role and what you’ll do…
We’re 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. You’ll create intuitive, high-performance user interfaces that power device lifecycle management at scale—working at the intersection of frontend engineering, real-time data, and secure cloud integrations.
This is a high-impact role where you’ll shape the user experience across a complex SaaS platform, collaborating closely with backend engineers and product teams to deliver seamless, scalable solutions. You’ll 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 you’ll 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 we’re 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 limit—take 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 people’s lives.
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.
