Web Development
Fast, accessible, SEO-friendly web applications.
Fast, accessible web apps with React, Next.js and modern frontends.
export function Hero() {
return (
<section className="hero">
<h1>We ship fast.</h1>
</section>
)
}Performance
hiis.io · mobile · simulated 4G
What we deliver
React & Next.js SPA and SSR apps
Design systems & component libraries
Accessibility & Core Web Vitals performance
Headless CMS & API integrations
Use cases
Real problems we solve for teams like yours.
Marketing & landing pages
Edge-cached, sub-second pages tuned for conversion and Core Web Vitals from day one.
SaaS dashboards & portals
Complex data UIs with real-time updates, role-based views, and polished interaction states.
E-commerce storefronts
Headless commerce built on Next.js with personalised search, fast checkout, and full CMS control.
Design system implementation
Taking your Figma design system and turning it into a typed, tested, documented component library.
Why teams choose HIIS
Core Web Vitals obsession
We track LCP, INP, and CLS in every sprint. You ship with a Lighthouse score above 90 as a baseline.
Accessibility-first
WCAG 2.1 AA compliance, semantic HTML, keyboard nav, and screen-reader testing, never treated as an afterthought.
TypeScript all the way down
Type-safe components, prop validation, and zero any. Your codebase stays maintainable as it grows.
Full-stack capable
We pair the frontend with a Next.js API layer, edge functions, and server components so you ship one cohesive product.
See it in action
Live, interactive demos of what we actually build and operate.
Total initial JS
271kB gzip
Technologies we use
React
Fast, maintainable web apps with React and a modern component architecture.
Deep diveFrequently asked questions
Testimonials
Trusted across industries
From public institutions to crypto exchanges, teams choose HIIS to ship software that performs, and they say so.
- AI
“We carried decades of legacy systems. HIIS delivered secure, well-documented APIs and an AI document-classification pipeline in Python and Hugging Face that cut manual processing by 60%.”
Claire MensahHead of Modernisation · National Records AgencyGovernment “HIIS built our spot exchange, order book, wallets and KYC, to take real volume under load. We have run at sub-50ms order latency and 99.99% uptime since launch.”
Marco RossiFounder & CEO · Vertex ExchangeFinance & Crypto“Our headless storefront on Next.js loads in under a second and conversion is up 38%. HIIS sweated every Core Web Vital.”
Isabelle MoreauVP of Ecommerce · Lumière Retail GroupEcommerce- AI
“HIIS built offline-first farm-management tools that sync the moment our growers get signal, plus TensorFlow yield-forecasting models, output up 22% and waste down 30%.”
Aïcha TraoréChief Executive Officer · GreenField AgritechAgriculture “HIIS delivered a HIPAA-compliant telehealth platform, secure video, scheduling and e-prescriptions, that our clinicians actually enjoy using. Wait times fell 45%.”
Dr. Sarah ChenChief Medical Officer · Lumen HealthHealth
- AI
“The mobile banking app HIIS shipped in Flutter feels instant, and their real-time AI fraud-scoring models caught threats we were missing, dropping fraud losses by 40%.”
David OkekeHead of Digital Banking · Meridian Retail BankBanking - AI
“HIIS built a multilingual semantic search engine across 20+ African languages using RAG, OpenAI and a vector pipeline, sub-300ms over 100M+ documents.”
Olivier NkurunzizaFounder · Sahara AISearch - AI
“The AI recommendation engine HIIS built lifted our average order value noticeably, personalised discovery that genuinely converts.”
Mei LinChief Digital Officer · StyleNestEcommerce “Our core payments engine, re-engineered by HIIS in Scala and Kafka, clears five million transactions a day at sub-100ms latency. It has stayed rock-solid through every peak.”
Sophie LaurentChief Technology Officer · Atlas Commercial BankBanking
Other services
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