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Solvios is the leading IT company in the business to give you growth, revenue, and a global platform.
We're a US-based AI-augmented frontend development company helping startups, scale-ups and enterprises build fast, accessible and conversion-optimised web interfaces React.js, Angular, Progressive Web Apps, headless frontends and custom UI engineering delivered by senior frontend engineers who understand that a great interface isn't just what users see, it's what they feel when the page loads in 1.2 seconds, the component responds before they've finished clicking and the design system holds together across every screen size they didn't test in the brief.
Years of Experience
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Whether you're building a customer-facing product from scratch, re-engineering a legacy UI that's become a bottleneck, migrating to a modern framework or layering AI-powered interface capabilities onto an existing web application, our frontend development services cover every layer of the work. React.js, Angular, PWAs, headless frontends and design systems all engineered to the same standard: fast, accessible, maintainable and built to scale without a rewrite every eighteen months.
React is the dominant choice for product teams that need component-driven architecture, a rich ecosystem and the flexibility to build everything from a single-page application to a full-scale enterprise portal without outgrowing the framework. We build React applications the way production-grade engineering actually demands: strict TypeScript, well-structured component hierarchies that don't collapse under team growth, state management chosen for the actual data complexity rather than the pattern everyone used last year and the performance discipline that keeps React bundle sizes honest and render cycles predictable. Custom hooks built for reuse, not repetition. Code-splitting and lazy loading configured properly, not as an afterthought when the Lighthouse score embarrasses someone.
Angular is the right choice when the application is complex enough to need an opinionated framework that enforces consistency across a large team. Enterprise portals, complex dashboards, multi-module B2B applications Angular's dependency injection, strict typing and module architecture are features, not constraints, when the team and the codebase are both growing. We build Angular applications that stay maintainable as they scale: well-structured NgModules and standalone components, RxJS patterns used where reactive streams actually earn their keep rather than where they add complexity for its own sake, Angular Universal for SSR where SEO and load performance justify it and the testing discipline that means new features don't silently break existing functionality.
Progressive Web Apps close the gap between web and native without the App Store review cycle, the dual codebase maintenance burden or the 40MB download ask that loses two thirds of mobile users before first launch. We build PWAs engineered for the full specification service workers that make offline genuinely useful rather than just technically present, Web App Manifest configured for proper home screen installation, push notification architecture that respects user consent and the performance engineering that makes a PWA feel native on mid-range Android hardware, not just on the latest iPhone in the demo. For product teams where mobile reach matters and a native app budget doesn't exist yet, a well-built PWA is the honest engineering answer.
Design systems are the engineering investment that makes every subsequent sprint faster, every new feature more consistent and every designer-developer handoff less of a negotiation about whether that button is 14px or 16px. We build UI component libraries and design systems that work in production atomic components built on a consistent token architecture, accessibility baked into the component contract rather than audited after the fact, Storybook documentation that reflects the actual component behaviour rather than the idealised version, versioning strategy that lets the library evolve without breaking every application consuming it and the governance model that means the design system gets maintained rather than forked twelve times by teams who found it easier to copy the component than to contribute back.
When the content layer, the commerce layer and the frontend need to evolve independently or when a single backend needs to serve a web app, a mobile app and a third-party integration simultaneously headless architecture is the right foundation. We build headless frontends on Next.js, Nuxt and Remix that consume content from headless CMS platforms, commerce APIs and custom backends with the rendering strategy matched to what the content actually needs: static generation for pages that don't change, server-side rendering for pages that need to be fresh on request and client-side rendering for the interactive surfaces where SEO doesn't matter but response time does. The architecture that lets marketing move at marketing speed and engineering move at engineering speed, without either one blocking the other.
The frontend codebase that made sense in 2017 jQuery-heavy, tightly coupled to server-rendered HTML, no component architecture, no TypeScript, deployment via FTP is now the thing slowing down every sprint, scaring every new developer and making every feature request a risk assessment. We migrate legacy frontends to modern frameworks in structured, incremental phases that keep the existing application running while the architecture underneath it gets rebuilt: strangler fig pattern for large existing applications, component-by-component extraction where the codebase structure allows it and full rebuild where the technical debt is deep enough that incremental migration costs more than starting clean. The approach is always defined by the risk profile of what's running, not by what's most convenient to build.
Most frontend agencies treat AI as a feature to bolt onto the interface a chatbot here, an autocomplete there. We treat AI as a layer that changes how interfaces are built, how they adapt to users and how frontend engineering itself gets done. Every layer below uses AI to personalise, accelerate and optimise so the interfaces we ship are smarter from the first load and faster from the first sprint.
ML-driven personalisation of content, navigation, component visibility and interaction patterns so the interface each user sees reflects how they actually use the product, not the average behaviour of all users combined.
Highlights:
ML-driven personalisation of content, navigation, component visibility and interaction patterns so the interface each user sees reflects how they actually use the product, not the average behaviour of all users combined.
Highlights:
Frontend development isn't one capability. It's a category that spans component architecture, state management, rendering strategy, performance engineering, accessibility compliance, design system governance and the AI layer that separates interfaces that engage from interfaces that merely function. Here are the capabilities we deliver and the engineering bar we hold ourselves to on each one.
Component Architecture & State Management
Component hierarchies designed for the actual team size and codebase complexity not copied from a tutorial. Atomic design principles applied where they earn their keep. State management through Zustand, Redux Toolkit, Jotai or Pinia matched the actual data flow requirements rather than the pattern the previous team was most comfortable with. Shared state versus local state decisions documented in the architecture, not left to individual developer preference.
Rendering Strategy & SSR/SSG Engineering
Server-side rendering, static site generation, incremental static regeneration and client-side rendering matched to what each route actually needs. Next.js App Router and Pages Router, Nuxt, Remix and Astro used where the rendering model fits the content and the SEO requirements. The architecture decision that means your marketing pages rank and your application surfaces respond.
Performance Engineering & Core Web Vitals
LCP, CLS and INP targets set before development begins and validated against real device profiles throughout. Code splitting, lazy loading, image optimisation through next-gen formats and CDN delivery, font loading strategy, third-party script management and the build tooling Vite, Turbopack, configured for the production bundle sizes that real users on real connections actually download.
Accessibility & Inclusive Design Engineering
WCAG 2.1 AA compliance built into the component contract, not reviewed at the end of the project. Semantic HTML as the baseline. ARIA attributes used correctly, not liberally. Keyboard navigation tested on real devices. Screen reader compatibility validated with NVDA, VoiceOver and JAWS. Colour contrast, focus management, skip navigation and the inclusive design discipline that enterprise procurement teams and regulated industry clients are increasingly requiring before sign-off.
Frontend Testing & Quality Engineering
Unit testing through Jest and Vitest. Component testing through Testing Library with user-behaviour-centred assertions rather than implementation detail assertions. End-to-end testing through Playwright or Cypress covering the critical user journeys, not the ones easiest to automate. Visual regression testing through Storybook and Chromatic for design system components. The test coverage that means a new engineer's first PR doesn't silently break the checkout flow.
API Integration & Data Layer Engineering
REST and GraphQL API integration with proper error handling, loading states, optimistic updates and the data synchronisation discipline that keeps UI state consistent with server state. React Query, SWR, Apollo Client and tRPC matched to the API architecture. Real-time interfaces through WebSockets and Server-Sent Events where the use case justifies the complexity. The frontend data layer that doesn't accumulate race conditions and stale state problems six months after launch.
Animation & Interaction Engineering
Motion and interaction design implemented in code Framer Motion, GSAP, CSS animations and the Web Animations API used for the transitions and micro-interactions that make an interface feel polished rather than clinical. Performance budgets respected throughout: GPU-composited animations only, jank eliminated before it reaches production and the discipline that means 'add some animation' doesn't translate to a CLS regression in the next Lighthouse run.
Frontend Security Engineering
XSS prevention through Content Security Policy and output encoding. CSRF protection in form and API call architecture. Secure token storage patterns no access tokens in localStorage. Dependency vulnerability scanning integrated into CI. The frontend security practices that protect user data and keep your application off the breach-notification list built in, not reviewed as a pre-launch checklist.
We're not just another frontend development company. We're the AI-augmented frontend engineering partner you bring in when Core Web Vitals, accessibility compliance, component architecture and interface performance aren't acceptable to leave unsolved and when the current frontend codebase has become the thing slowing every other team down.
AI-powered UI personalisation, intelligent search, accessibility automation and generative interface patterns are built into how we approach frontend engineering not added to the proposal as a separate line item after the architecture is already decided.
You work directly with engineers who've built production frontend architectures at real scale design systems consumed across multiple applications, React and Angular codebases that survived team growth, PWAs serving millions of sessions and the headless frontend integrations that expose every data synchronisation assumption you made in week one. Not juniors learning TypeScript generics on your retainer.
React.js, Angular, Next.js, Nuxt, Remix, Astro deep on each, not pushing the one the team is currently most comfortable with. The framework recommendation you get is based on your product requirements, your team's capability and your long-term maintenance reality, not on which technology we're trying to staff.
Core Web Vitals targets set before development begins. WCAG 2.1 AA compliance built into the component contract. Both treated as engineering constraints that shape the architecture, not audits that happen after the launch when it's expensive to fix.
Clear sprint cadence, honest status, no surprise scope creep. Component deliveries demoed against real design specs, not wireframes. You always know what's shipped, what's blocked and what the next sprint contains.
We architect for server components, edge rendering, AI-native interfaces, composable frontend architectures and the patterns shaping the next generation of web experiences not the webpack configuration your last team spent three weeks debugging.
Most frontend projects don't fail because the engineers couldn't write the code. They fail because the component architecture was never designed for the team size that ended up working in it, the design system was never formalised so every developer invented their own abstractions, or the performance and accessibility requirements were treated as post-launch concerns rather than day-one engineering constraints. Our AI-augmented frontend development services follow a structured delivery methodology that surfaces those problems in week one.
Here's exactly how it works.
We audit your current frontend codebase, performance baseline, accessibility posture, component architecture, design-to-code consistency and the accumulated technical debt that's slowing your team down. For greenfield projects, we map your design system, API contracts, user journeys and performance requirements before any component gets written.
We define the component architecture, state management strategy, rendering approach, design token system, testing strategy and the AI integration points where intelligent interface capabilities earn their keep. Trade-offs documented with the reasoning so the decisions made in week two don't become the constraints nobody can explain in month six.
We build the token architecture, base components and Storybook documentation before the feature development begins. The foundation that makes every subsequent sprint faster, every component more consistent and every designer handoff less ambiguous. Accessibility baked into every component at the contract level.
We build application features in structured sprints against the component foundation API integrations, state management, routing, animation and interaction engineering with performance budgets enforced per sprint, not audited at the end. CI/CD pipeline with automated testing, bundle analysis and visual regression checks running from sprint one.
Cross-browser and cross-device testing on real devices, not just emulators. Core Web Vitals validated on real connections. Accessibility audit against WCAG 2.1 AA. End-to-end test coverage across critical user journeys. Security review of frontend attack surface. The pre-launch validation means the launch is a non-event, not an incident.
We monitor performance regression, dependency vulnerability alerts, accessibility drift and design system version updates after launch and continue feature development, component library evolution and the architecture reviews that keep the frontend compounding in quality rather than accumulating the kind of quiet debt that makes every new feature a three-day investigation.
Frontend engagements don't fit a single template: a greenfield product build, a design system overhaul, a legacy migration and a performance optimisation sprint all have different scope shapes and different risk profiles. The right engagement model depends on your timeline, your in-house team's capacity and how clearly the scope is defined on day one. Three models, all built for the delivery speed and engineering quality modern product teams actually need.
You're running a multi-quarter frontend build or modernisation, scaling a product across multiple surfaces, building out a design system for organisation-wide adoption or augmenting your in-house frontend team without the cost and lead time of permanent headcount.
Hand-picked React or Angular engineers, a UI/UX engineer, an accessibility specialist and a delivery lead working only on your product. Sprint planning, design reviews and component deliveries run on your calendar and your tooling. AI-augmented development is built into how the team delivers.
Monthly retainer. No surprise invoices, no scope-creep billing. Team composition flexes as your frontend roadmap evolves.
2-6 engineers
6-month minimum
Scales with 30-day notice
Most product teams start with one and evolve into another as the codebase and roadmap mature. Let's figure out the right starting point together.
Building AI-Augmented Frontend Foundations for the Businesses That Will Define the Next Decade. The product teams investing in production-grade, AI-augmented frontend engineering now won't be the ones explaining Core Web Vitals regressions, accessibility audit findings and replatforming bills two years from now.
Frontend challenges look different across industries: the performance tolerance, the accessibility requirements, the regulatory constraints on data displayed in the browser and the user expectations all change the engineering. These are the verticals where we've built production frontend architectures and understand what real users on real devices actually demand.
Honest answers to the questions every product manager, CTO and head of engineering asks before they hire a frontend development company. If something isn't covered here, our solution architects will walk you through it on a discovery call, no sales pitch, no fluff.
Look beyond the Dribbble shots and the framework logos. The right frontend development company asks more questions than it answers in the first conversation about your Core Web Vitals baseline, your accessibility requirements, your current component architecture and what a slow or inaccessible interface is actually costing you in user retention and conversion. Evaluate engineering depth in the discovery phase, transparency about performance and accessibility trade-offs, framework-agnostic thinking and whether they push back when the design brief implies a CLS problem nobody wants to acknowledge. Anyone who recommends React before they've understood your rendering requirements and your team's capability isn't the right partner.
End-to-end frontend development services cover frontend architecture design, UI component library and design system engineering, React.js or Angular application development, state management implementation, API and data layer integration, performance engineering and Core Web Vitals optimisation, accessibility compliance engineering, PWA development, headless frontend implementation, frontend testing and QA, and post-launch support and optimisation. The best engagements also include a codebase and performance audit before any development begins because the decisions made in week one define the technical debt your team will be managing in year two.
A focused frontend engagement component library build, PWA conversion or framework migration for a scoped codebase: $15,000-$60,000. A mid-complexity frontend application with design system, API integration and performance engineering: $60,000-$200,000. A full-scale enterprise frontend platform with multiple applications, AI-powered interface features and ongoing design system governance: $200,000-$600,000+. Ongoing frontend support and feature development typically runs $5,000-$25,000 per month. We provide detailed estimates after a codebase and requirements audit.
A focused component library or PWA build: 6-12 weeks. A mid-complexity frontend application with design system and API integration: 3-6 months. A full-scale enterprise frontend platform or major modernisation: 6-12 months, delivered in phases. We provide milestone-based timelines before development begins with release dates your product roadmap can actually commit to.
React for product teams that value ecosystem breadth, component flexibility and the ability to adopt new rendering patterns Server Components, streaming, edge deployment as they emerge. Angular for enterprise teams that need an opinionated full-framework structure enforcing consistency across a large codebase and a large team, where the cost of architectural inconsistency is higher than the cost of framework constraints. Both are production-proven at scale. The decision depends on your team's existing expertise, your codebase's complexity and how much architectural flexibility vs. architectural guardrails your organisation actually needs. We make the recommendation after understanding your situation, not before.
AI-augmented frontend development means building interfaces where AI is a structural layer personalisation engines that adapt content to individual user behaviour, semantic search that understands what users are looking for, accessibility automation that catches WCAG violations during development rather than in the audit and conversational UI patterns that reflect how AI-native users now expect to interact with software. If your competitors are shipping AI-powered interface features and your product isn't, the engagement gap is measurable. The frontends worth building now are the ones designed for the AI-native interaction patterns that are already becoming user expectations.
Performance is an engineering discipline built into the architecture, not a Lighthouse run at the end of the project. We set LCP, CLS and INP targets before development begins, enforce performance budgets per sprint through automated CI checks, optimise image delivery through next-gen formats and CDN, implement code splitting and lazy loading properly rather than as an afterthought, manage third-party scripts with the discipline that prevents them from dominating your Total Blocking Time and validate performance against real devices on real connections before every release.
WCAG 2.1 AA compliance is built into the component contract from the first component, not reviewed at the end of the project. Semantic HTML as the baseline. ARIA attributes used correctly, not added to silence linting warnings. Keyboard navigation designed and tested before visual design is finalised. Screen reader compatibility verified with NVDA, VoiceOver and JAWS. Colour contrast, focus management and skip navigation tested on real assistive technology. AI-driven accessibility scanning integrated into our component development workflow to catch issues during development rather than in the audit.
Yes. We conduct a codebase audit first component architecture, performance baseline, accessibility posture, test coverage, dependency health and the accumulated technical debt that's slowing your team down. We give you an honest picture of what you've inherited and a clear recommendation for what to do about it. Sometimes the answer is to extend and improve. Sometimes it migrates to a modern framework. Sometimes it establishes the design system governance that the codebase needs but was never built. We work in your existing stack before recommending a change.
Yes it's one of our core frontend engineering capabilities. We build UI component libraries and design systems that work in production: atomic components on a consistent design token architecture, accessibility baked into every component at the contract level, Storybook documentation that reflects actual component behaviour, versioning strategy that lets the library evolve without breaking consuming applications and the governance model that means the design system gets maintained and adopted rather than forked and ignored. We also extend and improve existing design systems when the foundation is solid but the governance or documentation has drifted.
Three models: Dedicated Frontend Team (for multi-quarter product builds, design system programmes and ongoing frontend roadmap execution), Time & Material (for iterative development, discovery phases and evolving design specs) and Fixed Cost (for well-scoped frontend projects with stable requirements). When you hire frontend developers from us, we recommend the right model based on your actual situation not based on which model is most convenient for us to staff.
Yes. Post-launch frontend support includes performance regression monitoring, dependency vulnerability alerts and patches, browser compatibility updates, design system version management, accessibility drift monitoring, feature development and quarterly frontend architecture reviews. You can hand over the full maintenance responsibility or run it alongside your in-house team. SLAs are defined per engagement and reported every month.
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Solvios is a leading software development company crafting innovative solutions for businesses. We Specialize in custom software, web & mobile app development, and digital marketing. Partner with us to transform your vision into reality and achieve digital success.
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