Frontend Engineer
Posted Updated
Description
Location: Cardiff
Hybrid/Flexible Working
Salary: Up to £50,000 depending on experience, plus a potential bonus of up to £10,000
The Role
You'll join the Engineering team at LDMS as a Frontend Engineer, working within a team and reporting to an Engineering Team Lead. You'll own frontend delivery for the features your team ships, from design review through to production, working to the standards and patterns your team has set.
Our stack is React and TypeScript on the frontend with MUI, Java and Spring Boot on the backend, and PostgreSQL with schema-per-tenant multi-tenancy underneath, all cloud-hosted on AWS. Testing is Vitest, WebdriverIO and Playwright, running in CI.
You'll work within the frontend standards and patterns set for your team, and feed into them where you see a better approach. You'll be trusted to decide how a feature gets built, to push back on a design when the implementation cost does not justify it, and to keep moving when the requirements are still unclear. Supporting junior engineers is part of the job.
Key Responsibilities
These may change with the needs of the business, but the main areas are:
Technical Skills
Design and build small to medium frontend features end to end in React and TypeScript with minimal oversight
Make sound technical choices within established patterns and explain the trade-offs when asked
Work within the established component library and UI patterns, extending them properly rather than working around them
Write tests at unit, integration and end-to-end level, and argue for the coverage that matters
Consider performance and accessibility in your own code and deal with the obvious problems before review
Identify and raise frontend technical debt clearly, with a view on what it is costing
Delivery
Plan and deliver frontend work end to end, managing your own time and raising risks early
Pull out dependencies and unknowns at the start of work, particularly where the frontend depends on a backend contract that does not exist yet
Own the quality of what you ship through to production, then watch for regressions after release
Give reliable estimates at feature level and flag slippage early rather than late
Keep delivery moving when designs or requirements are unsettled, while chasing the clarity you need
Impact
Contribute consistently to your team's goals, to the point where your absence would be felt on delivery
Help junior engineers get better through informal mentoring on day-to-day frontend questions
Raise process improvements and follow them through when you take ownership
Share what works from your own delivery so the team picks it up rather than solving the same problem again
Communication
Adapt how you communicate to the audience, with technical detail for engineers and clear summaries for product and stakeholders
Contribute substantively to design reviews
Give specific, useful feedback in code review, and take it the same way
Work directly with product and design, and raise disagreements early and professionally rather than letting them sit
Write documentation other people can pick up and use without coming back to you
AI and Innovation
Review AI-assisted code to the same standard as hand-written code, and check that generated tests assert the requirement rather than the implementation
Use AI to accelerate delivery without transferring the cost to reviewers or to long-term maintainability
Keep design decisions with the engineer, and do not let generated code reshape component structure by default
Follow the team's agreed approach to AI-assisted work, and keep the rules and skills for your area current as things change
Take responsibility for what carries your name and what you commit to, whatever helped produce it
Requirements
Essential
Solid commercial frontend experience building and maintaining production React applications in TypeScript
Strong React and TypeScript fundamentals, including component composition, state management and typing that holds up under review
Experience building with MUI or a comparable component library
Experience working within a design system or established component library, including extending it properly rather than forking it
You can take a UI idea, whether a sketch, a design file or a conversation, and turn it into something buildable
You care about the detail. Not just whether it works, but whether it feels right. You take pride in UI and UX that is genuinely good
Solid across unit, integration and end-to-end testing, for example Vitest, WebdriverIO or Playwright
Comfortable with Git, and with builds and tests running in a CI/CD pipeline such as Jenkins
Able to make progress when requirements or designs are incomplete, while chasing the clarity you need
Clear communicator in writing and in person, with updates and technical explanations that people can act on
Desirable
Accessibility experience, including working to WCAG standards
Frontend performance work, including measuring against a baseline rather than guessing
Experience with Docker or other containerisation tools
Experience with cloud-hosted systems on AWS
An understanding of what it takes to build software in a financial or otherwise regulated environment
Experience using AI-assisted or agentic development well as part of day-to-day engineering
Experience supporting or mentoring graduate and junior engineers
Hybrid/Flexible Working
Salary: Up to £50,000 depending on experience, plus a potential bonus of up to £10,000
The Role
You'll join the Engineering team at LDMS as a Frontend Engineer, working within a team and reporting to an Engineering Team Lead. You'll own frontend delivery for the features your team ships, from design review through to production, working to the standards and patterns your team has set.
Our stack is React and TypeScript on the frontend with MUI, Java and Spring Boot on the backend, and PostgreSQL with schema-per-tenant multi-tenancy underneath, all cloud-hosted on AWS. Testing is Vitest, WebdriverIO and Playwright, running in CI.
You'll work within the frontend standards and patterns set for your team, and feed into them where you see a better approach. You'll be trusted to decide how a feature gets built, to push back on a design when the implementation cost does not justify it, and to keep moving when the requirements are still unclear. Supporting junior engineers is part of the job.
Key Responsibilities
These may change with the needs of the business, but the main areas are:
Technical Skills
Design and build small to medium frontend features end to end in React and TypeScript with minimal oversight
Make sound technical choices within established patterns and explain the trade-offs when asked
Work within the established component library and UI patterns, extending them properly rather than working around them
Write tests at unit, integration and end-to-end level, and argue for the coverage that matters
Consider performance and accessibility in your own code and deal with the obvious problems before review
Identify and raise frontend technical debt clearly, with a view on what it is costing
Delivery
Plan and deliver frontend work end to end, managing your own time and raising risks early
Pull out dependencies and unknowns at the start of work, particularly where the frontend depends on a backend contract that does not exist yet
Own the quality of what you ship through to production, then watch for regressions after release
Give reliable estimates at feature level and flag slippage early rather than late
Keep delivery moving when designs or requirements are unsettled, while chasing the clarity you need
Impact
Contribute consistently to your team's goals, to the point where your absence would be felt on delivery
Help junior engineers get better through informal mentoring on day-to-day frontend questions
Raise process improvements and follow them through when you take ownership
Share what works from your own delivery so the team picks it up rather than solving the same problem again
Communication
Adapt how you communicate to the audience, with technical detail for engineers and clear summaries for product and stakeholders
Contribute substantively to design reviews
Give specific, useful feedback in code review, and take it the same way
Work directly with product and design, and raise disagreements early and professionally rather than letting them sit
Write documentation other people can pick up and use without coming back to you
AI and Innovation
Review AI-assisted code to the same standard as hand-written code, and check that generated tests assert the requirement rather than the implementation
Use AI to accelerate delivery without transferring the cost to reviewers or to long-term maintainability
Keep design decisions with the engineer, and do not let generated code reshape component structure by default
Follow the team's agreed approach to AI-assisted work, and keep the rules and skills for your area current as things change
Take responsibility for what carries your name and what you commit to, whatever helped produce it
Requirements
Essential
Solid commercial frontend experience building and maintaining production React applications in TypeScript
Strong React and TypeScript fundamentals, including component composition, state management and typing that holds up under review
Experience building with MUI or a comparable component library
Experience working within a design system or established component library, including extending it properly rather than forking it
You can take a UI idea, whether a sketch, a design file or a conversation, and turn it into something buildable
You care about the detail. Not just whether it works, but whether it feels right. You take pride in UI and UX that is genuinely good
Solid across unit, integration and end-to-end testing, for example Vitest, WebdriverIO or Playwright
Comfortable with Git, and with builds and tests running in a CI/CD pipeline such as Jenkins
Able to make progress when requirements or designs are incomplete, while chasing the clarity you need
Clear communicator in writing and in person, with updates and technical explanations that people can act on
Desirable
Accessibility experience, including working to WCAG standards
Frontend performance work, including measuring against a baseline rather than guessing
Experience with Docker or other containerisation tools
Experience with cloud-hosted systems on AWS
An understanding of what it takes to build software in a financial or otherwise regulated environment
Experience using AI-assisted or agentic development well as part of day-to-day engineering
Experience supporting or mentoring graduate and junior engineers