FRONT-END DEVELOPMENT SERVICES
Build custom front-end solutions with experts trusted by 1500+ companies.
Our front-end developers design and build web applications that stay fast and stable as your product grows. Work with vetted engineers who've shipped front-end solutions for leading global brands.
Sr. Front-End Engineer
Carlos M.
12 years of experience
Previous Client
Sr. UI/UX Designer
Valentina R.
10 years of experience
Previous Client
Sr. JavaScript Engineer
Miguel A.
14 years of experience
Previous Client
Sr. Front-End Architect
Diego L.
16 years of experience
Previous Client
Sr. Front-End Testing Engineer.
Andrés P.
11 years of experience
Previous Client
FRONTEND DEVELOPMENT SERVICES
No matter what you're building, we can help.
Our front-end development services are built for complex projects, where choices about architecture, state, and rendering shape how fast you can move. We support teams with everything from prototyping to performance optimization.
Front-End Architecture & Modernization
Legacy code is a liability that slows down every new feature. Rewriting a massive jQuery or AngularJS monolith from scratch is rarely a viable business strategy. We refactor monolithic front-ends into modern, component-based architectures incrementally, allowing you to ship value while paying down technical debt.
Our teams use the "Strangler Fig" pattern to migrate applications to React, Vue, or Angular piece by piece. We introduce build tools like Vite and Webpack, implement strict typing with TypeScript, and establish CI/CD pipelines. You get a modernized codebase that is testable and extensible, without the risk of a "big bang" rewrite.
Micro-Frontend Architecture
Scaling a complex front-end web development project on a monolithic codebase eventually creates a gridlock where engineers block each other. We decouple your application into independently deployable domains to restore development velocity.
We implement module federation to stitch distinct features together at runtime, allowing your teams to deploy updates without waiting for others. We establish governance models for shared dependencies to prevent bundle bloat while ensuring a cohesive user experience. The result is a unified interface that looks like a single product to the user, but deploys like a collection of microservices.
Component Library Development
Teams should not be rebuilding buttons and form inputs for every new feature. Inconsistent UI is a symptom of wasted engineering hours. We build reusable component libraries that enforce design consistency and speed up development across your organization.
Our engineers create documented component libraries using Storybook, backed by strict versioning and governance. We implement theming tokens and accessibility primitives at the root level. So your developers can stop debating pixels and start shipping features by assembling pre-validated blocks.
Next.js & Hybrid Rendering Architectures
The trade-off between search engine optimization and interactivity is a thing of the past. Traditional Single Page Apps sacrifice search rankings and initial load speed for interactivity. We build hybrid applications using frameworks like Next.js that deliver the best of both worlds.
We architect solutions using Server-Side Rendering (SSR) for instant first-paint and SEO, then hydrate into a fully interactive application on the client. We implement Incremental Static Regeneration (ISR) to serve dynamic content at static speeds. So you get an application that ranks on Google and feels instant to the user.
State Management & Application Architecture
Complex apps die when data flow becomes unpredictable. As features multiply, managing state across hundreds of components creates bugs that are impossible to reproduce. We implement robust state management architectures that ensure data consistency without performance penalties.
We select the right pattern for the job, whether that’s Redux for global transaction state, TanStack Query for server-state synchronization, or atomic state for high-performance UI updates. We decouple business logic from UI components to make your application testable, predictable, and easier to refactor as requirements evolve.
Front-End Performance Optimization
Performance is a feature, not an afterthought. Slow-loading pages drive users away and hurt search rankings. We optimize front-end performance by analyzing the critical rendering path, eliminating render-blocking resources, and implementing aggressive caching strategies.
Our engineers profile applications with Lighthouse and WebPageTest to target Core Web Vitals (LCP, CLS, INP). We implement code splitting, lazy loading, and image optimization pipelines. We reduce JavaScript execution time to improve Time to Interactive. So your application performs on low-end devices, not just developer workstations.
Front-End Test Automation
Manual testing is the bottleneck that kills release velocity. If you rely on humans to click through every screen before a deploy, you cannot maintain release velocity. We build automated testing pipelines that catch regressions before they merge, not after they launch.
We implement End-to-End (E2E) testing suites using Playwright or Cypress that simulate real user workflows. We integrate Visual Regression Testing to catch pixel-level layout shifts that unit tests miss. This shifts quality left, giving your developers the confidence to deploy to production confidently, even during high-risk windows.
UI/UX Design & Prototyping
Building without validation leads to expensive rework. We validate workflows before a single line of code is written. We create interactive prototypes and conduct usability testing to ensure the engineering effort is focused on the right problems.
Our designers use Figma to create high-fidelity mockups and documented developer handoffs. We conduct user research and analyze session data to iterate on designs. You get a user interface grounded in actual user behavior, not assumptions.
Front-End case studies
Hundreds of front-end projects delivered.
From initial builds to high-traffic optimization, we have the experience to build front-end solutions that deliver real value. It's why 500+ clients choose us as their front-end development company.
- MEDIA & ENTERTAINMENT
Redesigned Front-End and Improved UX for Univision’s 100M Users
Univision needed to pivot to mobile-first content delivery and improve usability for their audience. We provided 10 senior developers focused on front-end development and UX for their main website and apps. The engagement included a complete front-end redesign in React and a new mobile news app. Our 10-year partnership helped Univision modernize its digital presence.
- TRAVEL & HOSPITALITY
Migrated Website to React and Developed Mobile App for Great Wolf Resorts
Great Wolf Resorts needed to migrate from legacy PHP to a modern infrastructure and develop a companion mobile app. We provided a team of UX/UI designers, React developers, and QA analysts over a 5-year partnership. The team engineered a full migration to React and .NET Core. We also developed Android and iOS apps with improved front-end UX.
- FINANCIAL SERVICES
Redesigned Onboarding Experience That Helped Double Customer Base in 18 Months
Azlo needed UX/UI engineers to convert brick-and-mortar banking customers to their digital platform. We provided a team of front-end, back-end, and DevOps specialists over a 2-year engagement. On the frontend, the team refactored the onboarding application for better UX/UI and built CI/CD pipelines. After 18 months, Azlo doubled their customer count.
Retail and E-Commerce
Urban Outfitters accelerated their pivot to e-commerce. We optimized their website to support the shift.
- 4-Year Engagement
- 8 Specialists
- 10/10 NPS Score
When the pandemic shuttered brick-and-mortar operations, URBN needed to pivot to pure-play e-commerce for Urban Outfitters, Anthropologie, and Free People. They needed to optimize website performance to handle traffic spikes and boost online conversion rates under tight timelines. We provided a dedicated team of 8 senior specialists including front-end developers, QA, and DevOps engineers. The result was a stabilized high-volume platform that drove a 38% increase in profits and supported a stock rebound.
Maximized revenue by reducing checkout errors
Improved site speed and navigation on mobile and desktop
Helped increase e-commerce profit margins
Get expert help for your Front-End project.
“Their engineers perform at very high standards. We've had a strong relationship for almost 7 years.”
OUR FRONT-END TEAMS
Meet the front-end experts behind our best work.
Behind every successful front-end solution is a highly specialized team. That's why we have experts for every stage of front-end development, from UI/UX design and component architecture to performance optimization and accessibility implementation.
- React
- Next.js
- TypeScript
- Webpack
- Certified Professional in Accessibility Core Competencies (CPACC)
- Figma
- Adobe XD
- Sketch
- NN/g UX Certification
- Certified Professional in Accessibility Core Competencies (CPACC)
- React
- Vue.js
- Angular
- Node.js
- AWS Certified Developer – Associate
- React
- Next.js
- Webpack
- GraphQL
- Google Professional Cloud Architect
- AWS Certified Solutions Architect – Professional
- Cypress
- Playwright
- Jest
- React Testing Library
- ISTQB Foundation Level (CTFL)
- ISTQB Advanced Test Analyst
Onboard a front-end team in weeks, not months.
About BairesDev
Why work with BairesDev? We’re trusted by the world’s top tech teams.
BairesDev is a US-based company powered by LATAM dev teams. Since 2009, we’ve built software for companies of all sizes—from scrappy startups to Fortune 500 giants. In fact, we’re one of the fastest-growing software development companies in the world. If you’re looking for onshore quality with nearshore benefits, we’re the partner for you.
1250+
Projects
Delivered
4000+
Developers
On Staff
96%
Client Retention
Rate
500+
Active
Clients
How we work
Here's what makes us easy to work with and hard to replace:
From code quality to compliance, we’ve optimized every part of how we work to support high-performing engineering teams. For you, that means clearer communication and smoother delivery. Plus, get peace of mind from having a development partner you can depend on.
Work with our front-end development experts.
- Vetted Senior TalentWe hire the top 1% of over two million applicants, so you only work with the best.We give you engineers who’ve already proven they can deliver. Our rigorous evaluation process includes technical tests, English assessments, soft skill screening, problem-solving simulations, and more. Out of over 2 million applicants who apply yearly, fewer than 1% get the chance to join our team. This is how we ensure you get highly qualified developers who are experts in their fields.
- Timezone AlignedWe work your team’s hours, which creates faster feedback loops and fewer blockers.Our nearshore software engineers share your workday, answering Slack messages, joining daily stand-ups, and presenting demos in real time. Project management is streamlined, questions are answered quickly, blockers are resolved as they come up, and simple code reviews take minutes, not days.
- Proficient in EnglishOur engineers have strong English skills, so communication and documentation are clear.Our engineers have 8+ years of experience collaborating with US teams. They excel at articulating complex technical concepts to diverse stakeholders, producing meticulous documentation, and driving technical discussions. This eliminates the ambiguity common with global teams.
- Full-stack CapabilitiesWith expertise in 100+ technologies, we have every specialist your project requires.We cover architecture, development, testing, DevOps, and everything in between—reducing hand-offs and creating better architecture decisions for a smoother path from concept to production.
- Scalable TeamsOur bench strength lets you scale engineering teams to meet new demands in weeks.With 4,000+ engineers on staff and thousands more in our pipeline, we can spin up pods or scale multiple teams across your company in days—so you hit aggressive timelines without bottlenecks.
- Standard MSAs & SOWSWe’re easy to onboard because we work the way your legal team expects us to.Because we’re based in the US, we follow the same legal standards your team already trusts—using MSAs, SOWs, and documentation that fit your procurement process.
- NDAs & IP ProtectionWe take data and IP seriously, with full protection baked into every engagement.Every engagement begins with a mutual NDA and clear IP ownership terms. Our secure workflows and confidentiality protocols also protect existing codebases and proprietary data.
- Enterprise-grade SecurityOur devs follow security protocols that meet even the strictest enterprise standards.Our engineers work only within the systems they need, using strict access control, audit-friendly workflows, secure repository storage, and more—bringing enterprise-grade protection to every engagement.
- Managed DeliveryWe actively track our devs’ work to make sure they consistently meet expectations.Delivery managers monitor progress, resolve blockers, and report regularly, so you never have to chase updates or second-guess performance.
Work with our front-end development experts.
Flexible engagement models
Need front-end expertise?
Plug us in where you need us most.
We customize every engagement to fit your workflow, priorities, and delivery needs.
- Need a couple of extra software engineers on your team?
Staff Augmentation
Get senior, production-ready developers who integrate directly into your internal team. They work your hours, join your standups, and follow your workflows—just like any full-time engineer.
- Need a few teams to deliver several projects in simultaneously?
Dedicated teams
Spin up focused, delivery-ready pods to handle full builds or workstreams. Together we align on priorities. Then our tech PMs lead the team and drive delivery to maintain velocity and consistency.
- Want to offload everything to us, from start to finish?
Software outsourcing
Hand off the full project lifecycle, from planning to deployment. You define the outcomes. We take full ownership of the execution and keep you looped in every step of the way.
Kick off front-end projects in 2-4 weeks.
We have reps across the US.
Speak with a client engagement specialist near you.
- Discuss solutions and decide team structure.
Tell us more about your needs. We'll discuss the best-fit solutions and team structure based on your success metrics, timeline, budget, and required skill sets.
- Onboard your team and get to work.
With project specifications finalized, we select your team. We're able to onboard developers and assemble dedicated teams in 2-4 weeks after signature.
- We track performance on an ongoing basis.
We continually monitor our teams' work to make sure they're meeting your quantity and quality of work standards at all times.
FRONT-END SOLUTIONS
Build with front-end engineers who have experience in your industry.
We've delivered projects across 130+ industry sectors. You won't have to spend weeks getting us up to speed. Our engineers come in with a clear understanding of your industry's user experience requirements, compliance needs, and performance standards.
FRONT-END CAPABILITIES
We cover the front-end stack (and everything around it).
As a top front-end development company, we use a modern tech stack built for performance and scale, with a focus on proven tools. Our expertise spans 100+ technologies, so we're equipped to support your full roadmap: front-end and beyond.
HTML & CSS Frameworks
Build Tools & Module Bundlers
We optimize front-end assets using build tools that handle transpilation, minification, code splitting, and tree shaking to reduce bundle sizes and improve load times.WebpackViteRollupParcelesbuildBabelPostCSSState Management
We implement state management solutions that handle application data flow, prevent prop drilling, and maintain predictable state updates across complex component hierarchies.MobXZustandRecoilVuexPiniaNgRxContext APITesting & Quality Assurance
We validate front-end functionality using testing frameworks that cover unit tests, integration tests, and end-to-end scenarios to maintain code quality and prevent regressions.JestReact Testing LibraryPlaywrightVitestTesting LibraryEnzymeJasminePerformance Monitoring & Analytics
We instrument applications for performance tracking, error monitoring, and user analytics to identify bottlenecks and optimize user experience based on real-world data.Google LighthouseWebPageTestNew RelicDatadogSentryGoogle AnalyticsHotjarFullStoryUI Component Libraries
We leverage component libraries that provide pre-built, accessible UI elements with consistent design patterns, accelerating development while maintaining quality standards.Ant DesignMaterial-UIShadcn/uiHeadless UIRadix UIPrimeReactMantineAPI Integration & Data Fetching
We implement data fetching strategies using libraries that handle caching, background updates, and optimistic UI updates for responsive user experiences.AxiosFetch APIReact QuerySWRApollo ClientRTK QueryTanstack QueryVersion Control & Collaboration
We manage code using version control systems and collaboration platforms that enable code reviews, branch management, and automated workflows for consistent development practices.GitGitHubGitLabBitbucketGitHub ActionsGitLab CIDesign Tools & Prototyping
We create high-fidelity mockups and interactive prototypes using design tools that support component systems, collaboration, and developer handoff with specs and assets.FigmaAdobe XDSketchInVisionZeplinAbstract
FRONT-END DEVELOPMENT PROCESS
How we deliver front-end solutions that drive business value:
We've refined our front-end development services across hundreds of projects. Whether you need end-to-end execution or support for your in-house team, we step in wherever you need us to move projects forward without friction.
Requirements Gathering & Design Review
We work with stakeholders to define user flows, performance targets, and accessibility standards. This includes reviewing designs and identifying target browsers, devices, and constraints.
Prototyping & User Validation
We create interactive prototypes using Figma or Adobe XD to validate user flows before writing code. Early testing with target users identifies usability issues and reduces late-stage changes.
Component Architecture & Design System
We establish component hierarchies, naming conventions, and reusable patterns that form the foundation of maintainable code. We create design systems with tokens for colors, typography, and spacing.
Development Environment Setup
We configure build tools, linters, formatters, and testing frameworks to enforce code quality from the first commit. Standardized environments enable consistent practices across teams.
Iterative Component Development
We build UI components incrementally, starting with buttons and forms before assembling complex features. Each component includes unit tests, accessibility features, and documentation.
Responsive Design Implementation
We implement mobile-first responsive layouts that adapt across screen sizes using CSS Grid, Flexbox, and media queries. Testing on actual devices validates touch interactions and performance.
API Integration & State Management
We connect front-end interfaces to backend APIs using proven patterns for data fetching, caching, and error handling. State management solutions maintain consistent data across components.
Performance Optimization
We profile applications with Lighthouse and DevTools to identify bottlenecks in rendering, JavaScript execution, and network requests. Optimizations include code splitting, lazy loading, and caching.
Cross-Browser Testing & Compatibility
We test functionality across Chrome, Firefox, Safari, and Edge using BrowserStack and automated tools. Polyfills and progressive enhancement ensure core features work across all browsers.
Accessibility Audit & WCAG Compliance
We validate keyboard navigation, screen reader support, color contrast, and semantic markup against WCAG 2.1 AA standards. Automated and manual testing ensures interfaces work for all users.
Production Deployment & Monitoring
We deploy front-end applications using CI/CD pipelines with automated testing, staging environments, and rollback capabilities. Post-launch monitoring tracks performance metrics and error rates.
Client testimonials
Get front-end results you can stand behind.
Our work holds up in reviews, in production, and in front of the board.
Global companies have trusted us to build and scale custom front-end solutions for over a decade.
Excellence.
Our minimum bar for client delivery.
Over 130 awards, accolades, and achievements showcase our quality and commitment to client success.
- 1,250+projects
delivered - 130+industry
sectors
America's Fastest-Growing Companies 2025 by Financial Times Top 100 U.S. IT Innovators 2025 by CIO100 Awards Nearshore North America Top Software Developers 2025 by Clutch Top 100 Global Outsourcing Providers 2024 by IAOP Global Outsourcing 100
What tech leaders ask about our front-end development services:
How quickly can you staff a front-end development team?
We typically staff front-end teams within 2–4 weeks. Our 4,000+ engineer bench includes front-end specialists with React, Vue, Angular, performance optimization, and accessibility experience. This allows us to assemble the right team quickly based on your specific needs.
What level of experience do your front-end developers bring?
We screen over 2 million applicants annually and hire less than 1%. We only select senior engineers with 8-10+ years of proven experience. Our front-end developers have built responsive applications serving millions of users, optimized web performance to achieve sub-second load times, and implemented accessible interfaces meeting WCAG standards. They understand component architecture, state management, browser APIs, and the trade-offs between different frameworks and performance strategies.
Will your team work in our time zone and integrate with our processes?
Yes. Our nearshore front-end teams work US business hours, communicate in English, and participate fully in your standups, sprint planning, and reviews. We adopt your project management tools, follow your branching strategies and code review processes, and operate as an extension of your team from day one.
Can you work with our existing front-end codebase and tech stack?
Absolutely. Our engineers have worked with legacy jQuery applications, modern React SPAs, Angular enterprise systems, and everything in between. We audit existing codebases, identify performance bottlenecks and technical debt, and propose incremental improvements that don't disrupt ongoing development. Whether you need feature development, refactoring, or framework migration, we adapt to your current state.
Do you have experience building accessible, WCAG-compliant interfaces?
Yes. We're ISO 27001 certified and have delivered accessible front-end solutions for healthcare, finance, government, and education. Our implementations include keyboard navigation, screen reader support, ARIA labels, color contrast compliance, and semantic HTML. We've delivered projects meeting the latest compliance requirements without slowing delivery.
How do you ensure front-end performance meets our speed requirements?
We establish performance budgets during planning, monitor Core Web Vitals throughout development, and use tools like Lighthouse and WebPageTest to validate speed. Our optimization strategies include code splitting, lazy loading, image optimization, CDN configuration, and caching policies. We test on real devices and networks to ensure applications meet target load times under realistic conditions.
Can you integrate our front-end with existing backend APIs and services?
Yes. We cover the full SDLC, so we also build front-end applications that consume REST, GraphQL, and WebSocket APIs from any backend system. Our engineers handle authentication, error handling, retry logic, and caching strategies to maintain responsive user experiences. We work with your API documentation and collaborate with backend teams to optimize data contracts for front-end performance.
How do you maintain team stability over long engagements?
We're structured for long-term partnerships. Most engineers stay on front-end projects for 2+ years, and our 96% client retention rate shows organizations continue working with us year after year. When team adjustments are needed, our bench depth allows us to add specialists or backfill roles quickly while maintaining project momentum through documentation and structured handoffs.
Can you scale a front-end development team or add back-end specialists as our project evolves?
Yes. Our 4,000+ engineer bench lets us expand a dedicated development team quickly as scope increases. Most clients start with front-end development team members and add back end development, QA, or DevOps specialists. We provide both engineers who embed into your workflow and dedicated teams that own a defined scope.
Do you handle US-based contracts and billing?
Yes. We operate from US headquarters under US law and jurisdiction. All contracts, billing, and procurement flow through domestic channels, eliminating international complications.
Useful Front-End resources
See why the biggest names in tech choose our front-end development services.
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