Frontend development services build the part of a website or web application that people see and use: the layout, buttons, forms, menus and the code that makes them respond. Brainguru turns designs into fast, accessible, responsive interfaces with frameworks such as React, Angular and Vue, and connects them to your back end and APIs.
What our frontend development services cover
The front end is where a visitor decides whether your product is easy to use. Our work usually includes:
- Custom web applications: Dashboards, portals, booking flows and internal tools built around your workflows rather than a template.
- Single page applications (SPAs): Interfaces that update content without reloading the whole page, for products where people move between screens often.
- Progressive web apps (PWAs): Web apps that can be installed on a phone, cache key screens and keep working on a weak connection.
- Design to code: Converting Figma or Sketch designs into clean, reusable components that match the design closely on every screen size.
- Responsive layouts: Mobile-first pages with fluid grids, flexible images and breakpoints tested on real devices.
- Performance tuning: Finding what makes an existing site slow and fixing it, from oversized images to heavy scripts.
- API integration: Connecting screens to REST or GraphQL services, with secure sign-in using standards such as OAuth.
Why the front end matters to your business
A slow or confusing interface costs sales and support time, even when the back end works perfectly. Two problems are common across the web, and both are front end problems.
Speed on phones: According to the HTTP Archive Web Almanac 2025, 48% of websites had good Core Web Vitals on mobile in 2025, against 56% on desktop. More than half of mobile sites still give users a slower or less stable experience than Google recommends.
Accessibility: The WebAIM Million 2026 report found detected WCAG 2 failures on 95.9% of the top one million home pages. The most common was low contrast text, found on 83.9% of those pages. Most of these failures sit in front end code: colours, labels, headings and buttons.
Good frontend work fixes both at the source. It also makes the product easier to change, because a clean component library lets your team add a screen in days instead of rebuilding styles each time.
Which framework should you use?
There is no single right answer. The choice depends on how interactive your screens are, whether pages must be found in search, and what your team already knows. Popularity matters because a widely used framework has more maintained libraries and more developers you can hire.
In the Stack Overflow 2025 Developer Survey, 66% of all respondents used JavaScript and 43.6% used TypeScript. Among web frameworks, React was used by 44.7% of respondents, Angular by 18.2% and Vue.js by 17.6%.
| Option | Often a good fit when |
|---|---|
| React, with Next.js | You need a large ecosystem, many interactive screens, and pages that also render on the server for search |
| Angular | A large enterprise application needs a structured, opinionated framework and strong typing throughout |
| Vue.js | You want a gentle learning curve and want to add interactivity to an existing site step by step |
| Plain HTML, CSS and light JavaScript | The site is mostly content, and speed and simplicity matter more than app-like behaviour |
We recommend a framework after we understand the product, and we explain the trade-offs in plain terms. If you have already chosen React, our React.js development team can start from your existing codebase.
How we build fast interfaces
Performance is easiest to build in from the first sprint. Google's guidance on Core Web Vitals sets clear targets: Largest Contentful Paint within 2.5 seconds, Interaction to Next Paint of 200 milliseconds or less, and Cumulative Layout Shift of 0.1 or less, measured at the 75th percentile of page loads.
JavaScript is usually the biggest cost. The Web Almanac 2025 page weight chapter reports that the median mobile home page carried 632 KB of JavaScript. The 2024 JavaScript chapter found that about 44% of the JavaScript bytes delivered to a median mobile page went unused during page load.
Our usual practices:
- Ship less code: Split bundles by route, remove unused libraries and load non-essential scripts later.
- Prioritise the main image: Serve modern image formats at the right size and load the largest visible image first.
- Reserve space: Give images, ads and embeds fixed dimensions so the layout does not jump while loading.
- Keep interactions light: Break long tasks into smaller pieces so taps and clicks respond quickly.
- Measure real users: Track field data, not only lab scores from a fast laptop.
For a site that already feels slow, we start with an audit and a short list of fixes ranked by impact, and confirm the gains with performance testing under realistic load. Our article on Core Web Vitals for Indian websites explains the metrics in more detail.
Accessible by default
Accessibility is part of frontend quality, not an extra. We use semantic HTML, visible focus states, labelled form fields, sufficient colour contrast and keyboard support for every interactive element. We check components with automated tools and by hand with a keyboard and a screen reader. For a formal audit against WCAG 2.2, our accessibility testing service tests the finished product and reports each barrier with a fix.
Progressive web apps
A PWA uses a service worker to cache files and data, so key screens open quickly and can work offline. It suits field teams, ordering apps and content sites used on weak mobile networks. Adoption is still selective: the Web Almanac 2025 PWA chapter found service workers on 20.0% of all websites it measured. A PWA is worth it when people return often or need offline access, and not for every brochure site.
How a frontend project runs
- Discovery: We review your designs, users, devices, browsers and the APIs the screens depend on.
- Component plan: We break the design into reusable components and agree a design system with your designers.
- Build in short cycles: Screens are delivered in small increments with regular demos on a staging link.
- Testing: Unit tests for components, browser tests with tools such as Cypress that walk through key journeys, plus cross-browser and device checks.
- Release and handover: Automated builds, documentation of the component library, and support after launch.
Many products need design help first. Our UI/UX design team can produce the wireframes and prototype, and the same people stay involved during build.
Technologies we work with
- Frameworks and libraries: React, Angular, Vue.js and Svelte
- Languages: HTML5, CSS3, JavaScript and TypeScript
- Styling and components: Tailwind CSS, Bootstrap and Material UI
- State management: Redux, Pinia and the React Context API
- Build and performance: Webpack, Babel and Lighthouse
- Testing and quality: Jest, Cypress and ESLint
What affects the cost of frontend development?
We do not publish prices, because two projects with the same page count can differ widely in effort. The main factors are:
- Number of unique screens: Ten pages built from three templates cost less than ten different layouts.
- Interactivity: Filters, drag and drop, charts and real-time updates take longer than static content.
- Design maturity: Finished, consistent designs are faster to build than designs still changing.
- Integrations: Each API, payment gateway or third-party widget adds work and testing.
- Browser and device range: Supporting older browsers or many device types increases testing time.
- Accessibility and performance targets: Agreed targets need testing time, which is cheaper than fixing later.
Questions to ask any frontend provider
- Performance: Which Core Web Vitals targets will you work to, and how will you measure them after launch?
- Accessibility: Which WCAG level do you build to, and how is it tested?
- Code ownership: Will we own the repository and the component library?
- Testing: Which tests run automatically on every change?
- Handover: Could another team maintain the code from your documentation?
We are happy to answer each of these in a free consultation before any commitment.