Engineering
Front-End Development Services
Fast, accessible interfaces for your SaaS platform or web app, built on modern frameworks and a design system that keeps growing after launch, by the founders and senior engineers you talk to.
Talk to the foundersInterfaces that stay quick, clear and easy to change as your product grows
Your front end is the part of your product people actually touch. If it is slow, confusing or broken on their device, nothing behind it matters. We build front ends that load quickly, work for everyone and hold up on every screen size, from a budget Android phone to a wide desktop monitor.
You talk to the founders who build your project, never a salesperson, and a senior engineer leads the work from the first component to launch. AI helps us move faster on the routine parts, and an engineer reviews every line before it ships.
We build on components and clear boundaries, so new features slot in without a rewrite. The repositories, design files and deployment accounts are yours from day one, with nothing locked to us.
Service benefits
What a well-built front end does for your business
Good front-end engineering is mostly invisible to your users. They just notice that everything is quick, obvious and works on the device in their hand.
- 01
Ready for every screen and context
People start a task on their phone and finish it on a laptop, often on a patchy connection. We design layouts, touch targets and loading states for all of those situations, so the experience holds together wherever it is used.
- 02
Senior judgement, sped up by AI
Coding assistants handle boilerplate, scaffolding and first drafts of tests. That frees our engineers to spend their time on state management, edge cases and the user journeys that matter most to your business.
- 03
Cheap, safe experiments
When features are built as self-contained modules behind flags, you can try an idea with a slice of your users, measure it and remove it cleanly if it does not work, without touching the rest of the product.
- 04
Users who can help themselves
Clear flows, sensible defaults and helpful error messages let customers finish tasks without contacting support. That lowers your support load and gives people a reason to come back.
- 05
Content that machines can read too
Semantic markup and structured data help search engines, screen readers and AI assistants understand your pages correctly, so your product stays visible and trustworthy as the ways people find information change.
- 06
Speed that keeps people engaged
We set performance budgets for page weight and Core Web Vitals, and check them on every change. Fast pages are kinder to users on slow devices and give people fewer reasons to leave.
What we do
Our front-end development services
Custom front-end development
Web apps, customer portals, dashboards and booking or checkout flows with complex state, built from a component library and tuned for rendering speed on real devices.
Front-end takeover and rescue
If an existing JavaScript codebase has become fragile, we start with a review, stabilise the riskiest areas, add tests around them and bring releases back under your control without a big-bang rewrite.
Explore the serviceModernisation and micro-frontends
We move ageing front ends to a modern framework step by step, and split very large apps into independently deployable parts where separate teams genuinely need that, so builds and releases get faster.
Explore the serviceDesign systems and component libraries
Tokens, components and patterns documented in Storybook, shared by designers and engineers, so hundreds of screens stay consistent and new ones take hours rather than weeks.
Explore the serviceAccessibility and security reviews
Audits against WCAG, keyboard and screen reader testing, plus checks for common browser-side risks such as unsafe scripts, leaky tokens and outdated dependencies, with a prioritised list of fixes.
Explore the serviceTechnology selection
An honest recommendation on framework, rendering approach and tooling for your product, your team's skills and the people you will want to hire, written down with the trade-offs.
Want a front end that feels instant and is a pleasure to work on? Talk to the founders who will build it.
Contact usTechnologies
Front-end technologies we work with
We pick mainstream, well-supported tools, so your product is easy to maintain and easy to hire for. Here is what we reach for, and when.
React and Next.js
Our default for most products. React has the largest ecosystem and talent pool, and Next.js adds server rendering, static generation, routing and image optimisation out of the box. It suits marketing sites, SaaS dashboards and content-heavy products that need to rank in search and still feel like an app.
Vue and Nuxt
A gentle learning curve and a tidy structure make Vue a strong choice for teams that want to move quickly or already know it. Nuxt brings the same server rendering and routing benefits to Vue projects. We also extend and modernise existing Vue codebases, including moves between major versions.
Angular
For large, long-lived business applications with many contributors, Angular's opinionated structure, dependency injection and built-in tooling keep a big codebase consistent. We build new Angular apps and help teams upgrade older AngularJS or Angular projects in stages.
TypeScript everywhere
Every project we start is written in TypeScript. Types catch whole classes of bugs before they reach users, make refactoring safer and act as living documentation, which matters most when your own team or a new partner picks up the code later.
Styling and design systems
Tailwind CSS or CSS modules for styling, design tokens shared with Figma, and Storybook to document and test every component in isolation. The result is a library designers and engineers can both trust.
Testing and tooling
Vitest and Testing Library for components, Playwright for end-to-end journeys across browsers, visual regression checks, linting and formatting in CI, and Lighthouse runs that flag performance or accessibility regressions before they merge.
Rendering
Choosing how your pages are rendered
How and where a page is built has a big effect on speed, search visibility and hosting cost. Most products mix approaches page by page. These are the trade-offs we talk through with you.
| Static generation | Server rendering | Client-side app | |
|---|---|---|---|
| How it works | Pages are built ahead of time and served from a CDN, then refreshed when content changes. | Each request is rendered on the server with fresh data, then made interactive in the browser. | The browser downloads the app and builds the page itself, fetching data through APIs. |
| First load | Usually the fastest, because the page is ready before anyone asks for it. | Fast, with personalised or live data in the first response. | Slower to start, then very quick as people move around the app. |
| Search visibility | Excellent: crawlers see complete pages. | Excellent: crawlers see complete, up-to-date pages. | Weaker for public pages unless content is pre-rendered. |
| Hosting cost | Low, as files are cached at the edge. | Higher, because servers do work on every request. | Low for the app itself, with the cost in the APIs behind it. |
| Best for | Marketing sites, documentation, blogs and product catalogues. | Dashboards with live data, logged-in areas and personalised pages. | Highly interactive tools such as editors, builders and internal apps. |
Quality bar
The standards every interface we ship meets
These are the checks we hold ourselves to on every front-end project, whatever the framework.
Core Web Vitals budgets
Loading, responsiveness and layout stability measured on every change, not once before launch.
WCAG accessibility
Colour contrast, keyboard access, focus order and screen reader labels designed in and tested by hand.
Responsive by default
Layouts tested from small phones to wide screens, with touch and pointer input both considered.
Search-friendly markup
Semantic HTML, metadata and structured data so search engines and assistants read pages correctly.
Ready for other languages
Translation-ready text, locale-aware dates and numbers, and right-to-left layouts where you need them.
Cross-browser testing
Key journeys run automatically in the major browser engines before each release.
Privacy-aware analytics
Tracking that respects consent choices, with no third-party scripts loaded before users agree.
Error monitoring
Browser errors reported with context, so we can fix issues before most users run into them.
How we work
How a front-end project runs with us
Whether we start from a blank page or an existing codebase, the shape is the same: understand the users, lay the foundations, then ship in small slices you can see and test.
Customer feedback
Working with Authect transformed our digital infrastructure. Their engineering team delivered our complex trading algorithm platform two weeks ahead of schedule without sacrificing code quality or security compliance. The seamless communication and deep technical expertise made them a true strategic partner.
Dmitry SokolovHead of Product, FinTech SolutionsPlanning a new interface or fixing one that is holding you back? Talk to the founders who will build it.
Contact usCase studies
Our front-end work
FintechTradingArtificial IntelligenceSmartTraderSmartTrader: Technical Analysis & Automated Trading Platform100k+Active Traders< 20msLatency50+Smart Tools
EdTechEsportsGamificationThe Game (UAB)The Game Academy: Gamified Tech Education Platform500+Students Trained10+Courses85%Completion Rate
LogisticsE-CommerceCross-BorderSHPD GlobalSHPD: Cross-Border Shipping Platform for Spain & LATAM< 60sInstant Quotes3 StepsBooking Flow100%Trackable
Industries
Front-end development across industries
E-commerce
Storefronts, product listings, search and filters, baskets and checkout flows where every extra second or confusing step costs sales. We focus on fast product pages, clear pricing and a checkout that works on any phone.
Fintech
Onboarding with identity checks, account dashboards, payment and transfer screens, and charts that make balances and history easy to understand, with strong session handling and clear confirmations at every risky step.
Healthcare
Patient portals, appointment booking and clinician dashboards that must be accessible to everyone, readable at a glance and careful with sensitive data shown on screen.
Hospitality
Booking engines, availability calendars and guest apps that work on a phone in a hotel lobby, with real-time prices and a smooth path from browsing to confirmed reservation.
Media & Entertainment
Content-heavy sites and streaming front ends that load quickly, rank well in search, handle large image and video libraries and keep readers moving to the next story.
Government
Public services and forms that meet strict accessibility rules, work on older devices and slow connections, and guide people through complex applications one clear step at a time.
Why Authect
Why teams choose Authect for front-end development
- 01
You work with the builders
You talk to the founders and the senior engineer who build your interface, never a salesperson. Decisions about your product are made by people who understand the code.
- 02
Small, senior teams
A small team led by a senior engineer keeps communication short and quality consistent. Everyone on it knows your product, your users and why each decision was made.
- 03
Engineers who care about design
We sweat spacing, motion and empty states as much as architecture, and we work closely with your designers or ours to make sure what ships matches what was intended.
- 04
Yours to keep
Code, components and documentation live in your accounts from day one. Your in-house team or another partner can take over at any point, with no lock-in.
How we cooperate
Ways to work with us on your front end
Start with a fixed-price build, work in monthly sprints alongside your team, or hand us ongoing support and evolution once the interface is live.
- 01
Fixed-price project
A clearly scoped product delivered for an agreed price and timeline. Ideal for MVPs and well-defined projects.
- Our responsibility:
- the scope, plan, budget, quality and delivery of the agreed product.
- Your responsibility:
- business context, timely feedback and sign-off on the scope.
- 02
Monthly sprints
A dedicated team, led by a senior engineer, working in short sprints, billed monthly. Ideal when your priorities evolve as you learn from users.
- Our responsibility:
- the team, sprint delivery, engineering quality and transparent reporting.
- Your responsibility:
- the product vision and setting priorities with us each sprint.
- 03
Support and evolution
After launch, we keep your product fast, secure and up to date, and keep shipping improvements as your business grows.
- Our responsibility:
- monitoring, updates, fixes and agreed response times.
- Your responsibility:
- reporting issues and planning the next improvements with us.
Insights
NewsNew pages: our front-end, back-end and e-commerce development workView news 
R&DINP and Core Web Vitals: what actually moves the needle?View R&D post 
GuideWhat are web development services? A practical guide for buyersView guide 
GuideTypes of software development: a complete overviewView guide 
GuideFrontend vs backend development: what's the difference and what do you need?View guide 
GuideEcommerce software development: platforms, custom builds and headless explainedView guide
FAQs
FAQs about front-end development
What is front-end development?
Front-end development is building everything your users see and interact with in the browser: layouts, navigation, forms, animations and the logic that connects them to your back end. It turns designs into working, accessible interfaces and is responsible for how fast and reliable your product feels.
Why choose Authect as your front-end development partner?
You work directly with the founders and a senior engineer who build your interface, with no account managers in between. We use AI to speed up delivery, an engineer reviews every line, and everything we build lives in repositories and accounts you own from day one.
Which front-end technologies do you use?
Mostly TypeScript with React and Next.js, plus Vue, Nuxt and Angular where they fit your product or your existing team better. For styling and components we use Tailwind CSS, CSS modules and Storybook, and we test with Vitest, Testing Library and Playwright. We recommend a stack after understanding your goals, not before.
Do you build to WCAG accessibility standards?
Yes. We design and build to the WCAG guidelines from the start: proper contrast, keyboard access, visible focus, meaningful labels and semantic structure. We test with automated tools and by hand with a keyboard and screen readers, and we can audit an existing interface and give you a prioritised list of fixes.
How can I tell whether a front-end developer has the right skills?
Look beyond the framework on their CV. Ask how they would make a slow page fast, how they handle accessibility, how they structure state in a large app and how they test it. Strong front-end engineers talk about users, performance and maintainability, and can explain trade-offs in plain language. That is the bar we hire and work to.
Can you work with our designers or an existing design?
Yes. We can build from your Figma files and work alongside your design team, or our own product designers can create or refine the design with you. Either way, we agree a shared component library early so design and code stay in step.
Can you take over or improve an existing front end?
Yes. We begin with a review of the code, dependencies, performance and accessibility, then agree what to fix first. We usually improve things in place, step by step, so your users keep getting releases while the codebase gets healthier.