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FRONTEND DEVELOPMENT COMPANY

Frontend Development Company for Fast and Accessible Web Apps

Citrusbug is a frontend development company building fast, accessible web applications with React, Next.js, Angular, and Vue. We develop new interfaces, modernize legacy UIs, improve frontend performance, and deliver maintainable code your engineering team can own.

Scope Your Frontend Build See Frontend Work
Hero Image
500+
projects delivered
98%
client retention

Certified

ISO 27001 ISO 27001
SOC 2 SOC 2
HIPAA HIPAA

Trusted By Industry Leaders

Bosch
Deloitte
eClinicalWorks
Epic Systems
Flipkart
McKinsey
HSBC
Softbank
Allianz
Airbnb
United Health
Phelic
Sun Pharma
Target
US Foods
Advinow

Certifications and Accreditations

HIPAA
GDPR
Compliance
ISO 27001
ISO 27001
ISO 27001
ISO 27001
ISO 27001
ISO 27001

Interface Problems Show Up in Support Tickets First

A checkout stalls on a mid-range Android phone. A dashboard freezes for a second each time a filter changes. An audit letter cites keyboard traps on the sign-up form.

Each one is a frontend problem, and each surfaces in churn reports and renewal calls long before anyone opens the repository. Citrusbug is a frontend web development company that builds and repairs that layer in React, Next.js, Angular, and Vue, and delivers custom frontend development solutions that new engineers can extend without a rewrite.

Frontend Development Services From Design System to Production

From new product interfaces to legacy UI upgrades, our frontend development services cover the architecture, components, integrations, performance, and accessibility needed to take a frontend from design through production. Each engagement is structured around your existing stack, product requirements, and engineering workflow.

React and Next.js Web Apps

Front-end web development services for SaaS products, customer portals, and admin consoles built on React 19 and Next.js 16, with server components used where they cut client JavaScript and client components kept for interactive views.

Angular Enterprise Interfaces

Structured Angular 22 applications for teams that want strict typing, dependency injection, and long-lived codebases, using Signal Forms and standalone components so form-heavy workflows such as claims intake or loan onboarding stay testable as the product grows.

Vue 3 and Nuxt Product Interfaces

Lighter dashboards, marketing sites, and internal tools written with the Composition API and Pinia so state stays predictable when a second team starts contributing, with Nuxt added wherever pages need server-side rendering to be indexed.

Frontend Design System and Figma Handoff

Responsive component libraries and design tokens that keep Figma and code in agreement, documented in Storybook so a new engineer can assemble a screen from existing parts and keep spacing, color, and states consistent across the product.

Progressive Web Apps

Installable web apps with service workers, offline caching, push notifications, and background sync, suited to field teams and low-connectivity users who need core tasks like form entry and record lookup to keep working when the network drops.

Legacy UI Migration

Phased replacement of AngularJS, jQuery, and template-rendered screens with React, Angular, or Vue components, planned screen by screen inside wider legacy application modernization work so feature releases keep shipping while the old interface shrinks with every release.

Performance and Accessibility Remediation

Fixes for slow, inaccessible interfaces already in production, working from field data on INP, LCP, and layout shift plus a WCAG 2.2 AA review, then shipping the changes straight to your codebase as small, reviewable commits.

API and Headless CMS Integration

Typed API clients for REST and GraphQL, plus headless CMS wiring for Contentful, Sanity, or Strapi, so editors publish without a deploy and engineers work from generated types that catch a changed response shape at build time.

Have a Slow or Inaccessible Interface to Fix?

Tell an engineer what’s slowing down your interface, where users are getting stuck, and what needs to change before your next release.

Schedule a 30-Min Call

Which JavaScript Framework Fits Your Product?

Framework choice sets hiring options, upgrade effort, and page speed long after launch, so the recommendation goes in writing before the first screen is built. Our React development team, Angular engineers, and Vue specialists each weigh in on your traffic profile, team skills, and release cadence.

Every engagement under our frontend development services opens with that recommendation, including the rendering strategy for each part of the product. A public catalog page that must rank and a logged-in dashboard that must respond instantly rarely want the same approach.
React 19 and Next.js 16

Marketplaces and SaaS storefronts that need search visibility and rich interactivity together fit this pairing. Next.js 16.3 adds Instant Navigation for app-like transitions, and React 19.3 was released in September 2026.

Angular 22

Angular 22, released in June 2026, suits large form-heavy applications with several teams in one codebase. It stabilizes Signal Forms and ships accessible Angular ARIA components, which trims custom widget code in onboarding and claims workflows.

Vue 3 and Nuxt

Small teams that want fast iteration on lighter dashboards and content-driven products lean on Vue 3. The Composition API and Pinia keep state readable, and Nuxt adds server rendering when public pages need to be indexed.

Shared Tooling Across All Three

Every framework choice above comes with TypeScript strict mode, ESLint, and a Vite or native framework bundler, so the quality checks stay the same whichever stack you pick, and a later switch keeps the same standards.

Engineering Standards for Production-Ready Frontends

Frontend and backend development stay in step when the interface layer runs on typed contracts, isolated state, and tests that execute on every change. Those standards apply to all front-end software development services we deliver, from the first commit.

Typed Contracts With Your Backend

  • Generated TypeScript clients from your OpenAPI or GraphQL schema make a renamed field fail at build time. Our backend development engineers align the schema with the frontend team whenever the API changes.

Isolated State and Data Fetching

  • Server state lives in TanStack Query or framework loaders, and client state stays in a small store such as Zustand or Pinia, so one screen’s refresh logic never reaches into another screen’s.

Observability From Release One

  • Error tracking, source maps, and session-level logging ship with the first release, so a production bug arrives with a stack trace, a browser version, and the steps that led to it.

Security at the Browser Boundary

  • CSP headers, output sanitization against XSS, CSRF protection on state-changing calls, and CI dependency audits are built into the development workflow, with security patches tracked as part of ongoing maintenance.

Test Layers Before Every Merge

  • Component tests, Playwright end-to-end flows across Chromium, Firefox, and WebKit, and visual regression snapshots run in CI, so a broken form field is caught before a reviewer sees the branch.

A Browser Matrix Agreed Up Front

  • A written browser and device matrix, including the oldest iOS Safari and Android WebView versions your customers still use, is agreed at the start and covered by cross-browser testing on real devices before each release.

BUILDING NEXT-GEN SOLUTIONS

Technologies and Platforms We Use

LangChain
Haystack
OpenAI GPT-4
Anthropic Claude
OpenAI GPT-4
Google Dialogflow
Google Dialogflow
RASA
Rasa
vapi
Vapi.ai
Microsoft Azure
Azure Prompt flow
DALL-E
DALL-E
Stable Diffusion
Stable Diffusion
tensorflow
TensorFlow
hugging face
Hugging Face Transformers
Amazon Glu
Amazon Glu
Pandas
Pandas
Numpy
Numpy
Redshift
Redshift
opencv
OpenCV
Tesseract OCR
Tesseract OCR

Core Web Vitals Built Into the Development Process

Google’s recommended thresholds are LCP under 2.5 seconds, INP under 200 milliseconds, and CLS under 0.1 at the 75th percentile. We define performance budgets before development and use automated testing and real-user data to identify regressions before and after release.

  • Check Icon

    Largest Contentful Paint: Hero images use modern formats and explicit dimensions, fonts are optimized and preloaded where appropriate, and above-the-fold content is rendered efficiently so the main content appears quickly.

  • Check Icon

    Interaction to Next Paint: Long-running tasks are split or moved off the main thread where appropriate, while hydration and client-side JavaScript are limited to interactive areas to keep clicks, taps, and keyboard interactions responsive.

  • Check Icon

    Cumulative Layout Shift: Images, embeds, and dynamic content reserve space before loading. Font fallbacks and fixed containers help prevent late-loading elements from shifting content or moving controls during interaction.

  • Check Icon

    Bundle and Rendering Strategy: Route-level code splitting, tree-shaking, and per-route JavaScript budgets keep applications lean. SSR, static generation, or partial prerendering is selected based on each page’s content and data requirements.

Frontend Development for Complex Digital Products

Interface requirements change with the industry, from screen-reader support in patient portals to streaming prices in trading dashboards.

• Patient portals and clinical dashboards
• Trading and banking interfaces
• Fleet tracking and dispatch views
• Checkout flows and storefronts
• Property listing and CRM screens
• Learning platforms and course players

WCAG 2.2 Accessibility Built Into Every Interface

Accessibility is considered at the component and workflow level, not added after development. Our frontend developers build interfaces toward WCAG 2.2 AA and validate key interactions through automated checks, keyboard testing, and screen-reader reviews. This also helps teams prepare interfaces for accessibility requirements such as those introduced by the European Accessibility Act.

  • Keyboard and focus management across interactive components and workflows
  • Screen-reader testing with NVDA and VoiceOver
  • Automated accessibility checks with axe alongside manual reviews
  • Focus visibility and target sizing checked across interactive elements
  • Forms and error states designed to remain understandable and operable with assistive technologies

Modernize Legacy Frontends Without Disrupting Releases

AngularJS to Angular 22 or React

A hybrid shell lets AngularJS screens and modern components run together while traffic moves across.

  • Screen inventory ranked by traffic and risk
  • ngUpgrade bridge or micro-frontend shell
  • Shared authentication and session state
  • Rollback path for every released screen
Outcome:
The AngularJS bundle shrinks with each release until the framework can be removed.

jQuery and Server Templates to React or Vue

Pages built from Rails, Django, or PHP templates with jQuery behavior gain component islands that mount inside the existing markup.

  • Islands mounted on high-traffic pages first
  • Server templates serve until each is replaced
  • Shared CSS tokens during the overlap
  • Accessibility fixes bundled into each rewrite
Outcome:
Pages gain components and tests one at a time, and no big-bang launch is scheduled.

Create React App to Vite or Next.js 16

Apps bootstrapped with Create React App move to Vite for single-page products, or to Next.js 16 where server rendering matters.

  • Build tooling swapped behind the same routes
  • React Router or App Router migration plan
  • Upgrade to React 19 and the React Compiler
  • Test suite ported to Vitest and Playwright
Outcome:
Builds get faster, dependencies are current, and the framework receives security updates again.

Monolithic UI to Micro-Frontends

Several teams sharing one release train split the interface into modules that deploy on their own schedules.

  • Domain boundaries agreed with each team
  • Module Federation or web-component shell
  • Shared design system and tokens
  • Contract tests between modules
Outcome:
Each team deploys its module without coordinating a full-site release or shared deployment window.

How Our Frontend Development Services Run From Kickoff to Handover

1

Discovery Before Code

User stories, wireframes, and a component inventory are written before implementation starts. On an existing product, the team also reads the repository, records bundle sizes and field Core Web Vitals, lists the browsers customers use, and ranks the riskiest screens. The output is a scoped plan with a rough timeline that a budget owner can review and challenge.

2

Design Tokens and First Components

Colors, spacing, typography, and interaction states become design tokens shared between Figma and code, and the first reusable components are built and documented in the component catalog. Designers approve each component once. Later screens assemble from approved parts, reviews focus on behavior and flow, and a brand refresh lands in one place.

3

Build in Vertical Slices

Engineers deliver one working slice at a time, such as sign-up, search, or checkout, running from UI through API call to test, and demo it on a staging URL. Daily updates reach your channel of choice, and regular demos let product owners redirect priorities while changes are still cheap to make.

4

API Integration and Authentication

Login flows connect to your identity provider, permissions map to visible UI states, and every request gets loading, empty, and error handling. Mock servers keep frontend work moving while backend endpoints are still being built, and mismatches between the design and the API surface while they are cheap to fix.

5

Staged Release and Monitoring

Releases go out behind feature flags to a small share of traffic first, with rollback ready and error tracking watching for new exceptions. The team compares field metrics before and after the release, and only then widens the rollout to every user, which keeps launch day uneventful for the support team.

6

Handover and Post-Launch Support

Before the engagement closes, the team walks your engineers and product owner through the architecture, the component catalog, the release process, and the open backlog. A frontend development company like Citrusbug can continue supporting the codebase through L1, L2, and L3 SLA options covering bug fixes, framework upgrades, and dependency patches after the first release.

Related Projects

View All Case Studies →

Client Testimonials (We're Rated 4.7 on Clutch)

THE PROJECT

Web & AI Development for Education Company

AI Development, Custom Software Development
Nov. 2024 - Ongoing
THE REVIEW
Their agile way of working, competence, and friendliness are impressive.
December 7, 2024
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

Citrusbug Technolabs handles a data extraction project for an education company. They're also responsible for managing an AI generation project for the client.

THE REVIEWER

CEO, Education Company

Johan Henrik

Education
1-10 Employees
Norway
Online
Verified
read-more Read More
THE PROJECT

Custom Automated System Dev for Veteran Medical Co

Generative AI, Application Testing, Custom Software Development
Aug. - Oct. 2024
THE REVIEW
Their communication and ability to capture exactly what I was asking for were impressive.
November 14, 2024
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

Citrusbug Technolabs built an automated system for a veteran medical company. The system needed to collect and store user data, generate customized letters based on surveys, and use AI to summarize reviews.

THE REVIEWER

Owner, Warrior Alliance

Jason Henry

Medical
1-10 Employees
Nashville, Tennessee
Online
Verified
read-more Read More
THE PROJECT

MVP Development for Freight & Capacity Marketplace

Custom Software Development
$10,000 to $49,999
Jan. 2024 - Feb. 2025
THE REVIEW
They were very calm and talented, and they did bring some of their own ideas.
January 28, 2025
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

Citrusbug Technolabs has developed an MVP for a freight and capacity marketplace. The team has created three different interfaces for three market segments.

THE REVIEWER

Founder, ActiveLanes

Harmanpreet Toor

Social Networking
1-10 Employees
Winnipeg, Manitoba
Online
Verified
read-more Read More
THE PROJECT

Web & Mobile App Development for Education Company

Custom Software Development, DevOps Managed Services
$10,000 to $49,999
THE REVIEW
What stood out most about them was their personalized approach and sense of ownership in every aspect of the project."
February 27, 2024
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

Citrusbug Technolabs built a Flutter cross-platform mobile app for an education company. They also developed two web apps and an admin panel and provided DevOps support for the client's infrastructure.

THE REVIEWER

Founder & CEO, YouHue

Ammar Khan

Education
1-10 Employees
Dubai, United Arab Emirates
Online Review
Verified
read-more Read More
THE PROJECT

Mobile App Development for Healthcare Company

Custom Software Development Mobile App Development UX/UI Design
$10,000 to $49,999
June 2023 - Jan. 2024
THE REVIEW
They didn't like the phrase "impossible to do", which made them very solution-oriented.
February 19, 2024
4.75
★ ★ ★ ★ ★
Quality4.5
Schedule4.5
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

A healthcare company hired Citrusbug Technolabs to design and develop a user-friendly application. The team provided tailored assistance to meet the client's requirements.

THE REVIEWER

CTO, Just Move Nordic

Mogens H

Healthcare
1-10 Employees
Denmark
Online Review
Verified
read-more Read More
THE PROJECT

Custom Web App Dev & Design for Financial Technology Firm

Mobile App Development UX/UI Design Web Design
Sep. 2023 - Ongoing
THE REVIEW
They're 100% on time and transparent throughout each stage of the project.
February 24, 2024
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

A financial technology company has hired Citrusbug Technolabs to build a custom web application. The team handles the development and design of the app.

THE REVIEWER

Founder, Financial Technology Firm

Kyle E

Financial services
1-10 Employees
Charlotte, North Carolina
Online Review
Verified
read-more Read More
THE PROJECT

Staff Augmentation for Singaporean Development Company

Mobile App Development
$10,000 to $49,999
THE REVIEW
"I do believe they are exceptional at where they stand."
5
★ ★ ★ ★ ★
Quality5.0
Schedule5.0
Cost5.0
Willing to refer5.0
PROJECT SUMMARY:

Citrusbug Technolabs took on a mobile app development project for a Singapore-based development house. They were provided with UX designs to execute. Currently, they're finalizing and fine-tuning the product.

THE REVIEWER

Director, Techzu Ichicode

Wayne N

IT Services
1-10 Employees
Singapore
Online Review
Verified
read-more Read More

Flexible Engagement Models for Frontend Development

Fixed-Price for Defined Scope

Known screens, integrations, and browser targets, as in a design system build or a single migration, suit a fixed scope.

  • Written scope and screen list
  • Agreed milestones and demo dates
  • Change requests estimated before work
  • Acceptance criteria per milestone
  • Handover documentation included

Time and Material for Evolving Products

Priorities that shift from sprint to sprint, as in an early SaaS product still finding its workflow, suit this model.

  • Sprint-based planning and reviews
  • Budget visibility every sprint
  • Scope reprioritized without contract changes
  • Backlog owned by your product manager
  • Monthly capacity adjustments

Dedicated Team for Ongoing Roadmaps

Continuous roadmaps call for engineers who learn the codebase and stay, or you can hire frontend developers to extend your own team.

  • Frontend engineers assigned full-time
  • Designer and QA added when needed
  • Your standups and tooling
  • Knowledge stays with the team
  • Team size adjusted as the roadmap changes

How Much Do Frontend Development Services Cost?

Frontend development costs vary with the number of screens, application complexity, integrations, accessibility requirements, and the amount of existing code that needs to be replaced. A business website may cost $3,000 to $10,000, while a complex web application can range from $15,000 to $40,000 or more. Share your requirements and current frontend to get a project estimate based on your scope.








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    Trusted By Many

    Why Choose Citrusbug as Your Frontend Development Company?

    Citrusbug brings 13+ years of software development experience to frontend projects, with a focus on architecture, performance, accessibility, and long-term maintainability. Our 4.7/5 Clutch rating reflects the experience teams bring to their development work.

    Prototype Before Commitment

    A clickable prototype or proof of concept validates the riskiest screen with real users before full build scope is set, so budget follows evidence.

    Stalled Project Takeover

    Frontend builds abandoned midway by another team get a code review, a stabilization plan, and a delivery date, so half-finished screens turn into shippable releases.

    Ownership Under NDA

    Source code, design files, and repository access belong to you at delivery, and every conversation about your product sits under NDA from the first call.

    Cost-Optimized Hosting

    Static assets, edge caching, and CDN settings are tuned to your traffic, which keeps hosting bills proportional to usage on Vercel, Netlify, or AWS CloudFront.

    FRONTEND ENGINEERING NOTES

    Framework Guides From Citrusbug Engineers

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    FAQs about Frontend Development Company

    How long does a frontend development project take?

    A static marketing site can take two to four weeks. Dynamic web applications with animations and API integrations usually take two to six months, depending on scope, review cycles, and testing.

    Which framework is best for a business web app in 2026, React, Angular, or Vue?

    React with Next.js suits products that need search visibility, Angular suits large form-heavy applications with many contributors, and Vue suits lighter products with small teams. Team skills and hiring plans should break any tie.

    Can you migrate our AngularJS or jQuery app without a full rewrite?

    Yes. Screens are replaced in phases behind a shared shell, so the old and new interfaces run side by side while releases continue, and each retired screen keeps a rollback path.

    How do I choose between front-end development companies?

    Ask for a written framework recommendation, browser and accessibility targets, sample pull requests, and references from products with similar traffic. Confirm who owns the code and how post-launch fixes are handled.

    Can you improve the speed and accessibility of a live website?

    Yes. Our frontend development services include fixing Core Web Vitals, accessibility gaps, and outdated dependencies in production interfaces, delivered to your repository with results compared against the starting numbers.

    Is WCAG 2.2 AA required for my website?

    It depends on where you sell and who you serve. The European Accessibility Act covers many EU consumer services, and ADA Title II web rules for US public entities phase in from 2027. Legal counsel confirms your case.

    Do you use AI tools in frontend development?

    Yes, within Citrusbug's Secure ADLC delivery process. AI assistants draft components, tests, and design-to-code conversions, and engineers review every change before it merges.

    Have a Frontend Project to Discuss?

    Tell us what you’re building, migrating, or fixing, and talk through the technical requirements with a frontend engineer.

    Talk to Frontend Engineers
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