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Expertise · Front-end engineering
Front-End Developer: Fast, Accessible Interfaces
A front-end developer’s work turns your users’ journeys into interfaces that are quick to understand and connected to the product’s services. At Etixio, our front-end engineers build these screens within a team supervised by a tech lead, including those that give access to your product’s AI features.
Understanding the technology
Front-end engineering in your project.
The front-end is the part of the software users interact with. It turns the available features into screens, forms and understandable feedback. Our work connects journey design, interface components and the contracts of the services that provide or store the data.
A high-quality front-end makes the product easier to adopt and simpler to evolve. Conversely, poorly split components and scattered styles slow down every new feature.
The right time
When should you bring in a front-end developer?
Front-end work comes into play at every stage of a product’s life, from the first interface to modernizing an application already in place.
Modernize an existing interface
A portal, back office or SaaS application whose usability, visual consistency or technical debt holds back users and the team.
Evolve the stack
Move from JavaScript to TypeScript, or from an older framework to a current stack, step by step and without interrupting releases.
Structure a design system
Create or evolve a library of reusable components to ensure consistency and speed up development.
Improve performance
Work on Core Web Vitals, load time and perceived smoothness, based on measurements.
Our scope of work
The work we take on.
Interface
Build components, screens and their various states from Figma mockups.
Integration
Connect APIs, handle errors and make actions understandable.
Usability
Check keyboard navigation, accessibility (WCAG), mobile responsiveness and end-to-end journeys.
Product collaboration
Work with designers, Product Owners and back-end developers, take part in code reviews and keep the design system alive.
Our front-end expertise
The front-end technologies we master.
Languages & frameworks
HTML, CSS, JavaScript and TypeScript; React, Vue.js, Angular and Next.js depending on the context and existing code.
UI & styles
Tailwind, Sass, CSS Modules or Styled Components to structure and maintain styles.
Testing & tooling
ESLint, Prettier, Storybook, tests with Jest, Testing Library, Cypress or Playwright.
APIs & data
Connections to REST, GraphQL or WebSocket APIs and management of browser-side data exchanges.
Performance & delivery
Bundle optimization, lazy loading, caching, server-side or static rendering when needed, CI/CD, monitoring and feature flags.
On the security side, see our article on securing a React application.
Front-end and AI
Making AI features usable.
A built-in assistant, search across your documents or an automatically generated suggestion are only valuable if users understand what they see: responses streamed as they are generated, viewable sources, loading states, explained errors, the ability to correct or approve before acting.
Our teams build these interfaces together with the back-end that calls the models, as part of our AI solutions for businesses and our AI agents and chatbots.
In the field
From technology to real-world use.
An approval request must show the relevant information, the possible actions and their outcome. We work on empty states, loading, error messages and keyboard navigation. The journey stays clear when an operation fails or when a user does not have the same permissions as a colleague.
The choices that matter
The choices to examine before building.
The framework is chosen after analyzing the product and the existing code. Shared components must cover genuinely repeated uses. We measure performance and test journeys across several screen sizes; a display that matches a mockup is not enough to validate the experience.
Engagement formats
How our front-end developers work with you.
Within a dedicated team
A dedicated team evolves your product over the long term, with front-end, back-end, QA and DevOps as needed, supervised by a tech lead.
On a fixed-price project
For an interface redesign or a new module with a defined scope, a fixed-price project commits to a result, a budget and a timeline.
Build & Run
Development, maintenance and continuous evolution of your interfaces and web applications.
From work to deliverables
Delivery your team can take over.
The scope of work specifies the components to build or take over and the acceptance criteria. We provide what is needed to understand the changes, verify them and continue the work.
- Documented components and states
- Interfaces connected to APIs
- Tests of user journeys
Frequently asked questions
Front-end developer: your questions.
What does a front-end developer do?
They build everything your users see and use. They turn mockups into fast, accessible and maintainable interfaces, connect them to APIs and ensure a consistent experience across the whole application.
When should you bring in a front-end developer?
To create a new interface, modernize an existing application, set up a design system, improve performance or deliver a product roadmap the current team can no longer absorb.
How do your front-end developers fit into a product team?
They collaborate with your designers, Product Owners and back-end developers, use your tools and take part in your rituals, with incremental releases and code reviews. The engineers are French-speaking, based in Madagascar and Mauritius, with a 1 to 3-hour time difference from Paris.
Which front-end frameworks do you master?
React, Vue.js, Angular and Next.js, as well as HTML, CSS, JavaScript and TypeScript. The choice depends on your existing code and the product’s constraints.
How do you ensure the quality of an interface?
Through documented components, unit and end-to-end tests (Testing Library, Cypress or Playwright), accessibility checks, performance measurements and code reviews before every production release.
How long does it take to get started?
The lead time depends on the skills and the scope. For a dedicated team, setup generally takes four to eight weeks, with a gradual ramp-up.
Can you build the interface for an AI assistant or AI feature?
Yes. We build the interface and the service that calls the model together — progressive display of responses, sources, user approval, error handling — for a feature that works in production.
Let’s talk about your technical context.
Tell us about the application, the issue to address and the known constraints. We will review the dependencies and the initial scope of work with your team.