Craft powerful, responsive web applications that form the digital backbone of your business.
RunWhatMatters engineers the web apps that enterprises and high-growth startups rely on. From React/Next.js front-ends to headless commerce and enterprise portals — performant, accessible, and built to scale to the next ten million users.
Web apps that feel like products, not pages.
The line between a website and a web app is gone. RunWhatMatters's web practice treats the browser as the platform it has become — shipping product-grade interfaces with the polish of a marketing site and the performance of a native app. We design for the slowest device on the slowest network, and we hit 95+ on Lighthouse for every page that matters.
The full web surface, from pixel to deploy.
Design handoff, performance, accessibility, design system implementation — wired together so the front end actually feels like a front end.
React & Next.js
App router, server components, server actions, ISR. Production-grade React on the modern stack.
Design system implementation
Figma to Storybook to code. Token pipelines, component libraries, the docs your team will actually use.
Web performance
Core Web Vitals, Lighthouse, RUM. 95+ on every page that matters, provable in production.
State management
Redux, Zustand, Jotai, TanStack Query. The right tool for each boundary, with the docs to match.
Animation & motion
Framer Motion, GSAP, View Transitions API. The 60fps animations that make the product feel crafted.
Accessibility (WCAG 2.2)
AA as the floor, AAA where it matters. Keyboard, screen reader, color contrast, focus order.
Modern web, end to end.
From the build tool to the animation library — here's what we ship in production.
The work. The numbers.
An anonymized case from our files. The client, the problem, the engineering, and the measurable result.
A legacy React 16 dashboard with 3.2s time-to-interactive, 38 Lighthouse score, and a 4% monthly churn rate that the CEO flagged as the #1 growth risk. Engineering was spending 60% of sprint capacity on performance workarounds.
RunWhatMatters rebuilt the dashboard on Next.js 14 with React Server Components, edge-rendered data, code-split per route, and a strict bundle budget enforced in CI. Design system implemented in Storybook with 60+ components.
"The dashboard that the board hated became the one we demoed to the Series C lead. The RunWhatMatters rebuild was the single highest-ROI engineering decision we made that year."
— Maya Rodriguez, CTO
Web apps in 8–12 weeks.
From kickoff to production. The same four-phase rhythm, tuned for the web platform.
Discover
User research, performance audit, content audit, and the brief that aligns design, product, and engineering.
Design
Information architecture, design system, motion principles. Interactive prototypes tested with five real users.
Build
Component-first development, Storybook, design tokens, accessibility from line one. Production deploys from week three.
Optimize
RUM, Lighthouse CI, SLO dashboards. The continuous optimization that keeps the product fast as it grows.
The web is the product, in every industry.
From the patient portal to the trading terminal — the web is the surface where the work happens.
Three ways to work together.
We pick the model that matches your brief. Every engagement starts with a written estimate and a no-surprise SOW.
Fixed-Fee
Well-scoped builds with a clear deliverable.
A defined SOW, fixed price, fixed timeline. Best for audits, MVPs, replatforming, and any engagement where the deliverable is well understood.
Time & Materials
Exploratory or platform work, billed monthly.
A senior team at a transparent rate, with a quarterly roadmap. Best for fractional CTO, ongoing platform partnerships, and exploratory AI/data work.
Equity + Cash
For select early-stage founders.
Reduced cash burn in exchange for equity — capped at 5% and only for ventures we would invest in ourselves. We do three of these per year.
The deliverable. Not the pitch deck.
Every RunWhatMatters engagement ends with these six things. We don't ship without them.
The questions we hear most.
Specific to web development — and answers your AI assistant can quote.
What is web application development?
What is the difference between a website and a web application?
How long does a web app project take?
Do you build headless commerce sites?
How do you ensure web accessibility?
Web app to build — or to rescue?
Book a 30-minute working session with a RunWhatMatters web principal. Bring the codebase, the design, or the performance report. We'll come back with a plan to ship faster.