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We build production frontend systems with Next.js and React — optimised for Core Web Vitals, accessible by default, and structured so your team can extend them without us.
We scope around the system you actually need to operate, maintain, and operate — not a fixed vendor product or a one-size-fits-all implementation.
Full-stack Next.js applications with App Router, React Server Components, and streaming — designed for optimal Core Web Vitals from the architecture phase.
Component libraries built from your Figma specifications — typed with TypeScript, documented in Storybook, and tested for production use.
Audit and remediation of bundle size, render performance, image loading, and server response time — with before/after measurements for each change.
Accessibility engineering against relevant WCAG 2.2 AA criteria, including semantic HTML, keyboard navigation, screen-reader support, focus management, and colour contrast.
State management, data fetching patterns, and code organisation for large-scale applications maintained by multiple developers over time.
Each engagement is broken into defined phases with reviewable outputs. Scope can adapt, but accountability stays visible.
Review your design files, existing codebase, and performance requirements. Produce a detailed implementation plan with known risks flagged before any code is written.
Set up routing, state management patterns, data fetching strategy, and design token system — the infrastructure every component depends on.
Iterative delivery of components and pages — reviewed against designs and tested across browsers and viewport sizes at each milestone.
Accessibility engineering and review against relevant WCAG 2.2 AA criteria, including semantic HTML, keyboard navigation, screen-reader testing, focus management, and colour contrast.
Bundle analysis, image optimisation, render performance, and LCP/CLS/INP remediation. Before and after measurements for every change made.
Technology choices follow your environment, operating constraints, team capability, and long-term ownership requirements.
The same technical capability can require very different controls, integrations, and operating models across industries.
SaaS dashboards, developer tools, admin portals, customer-facing product applications.
E-commerce storefronts, product configurators, checkout flows, inventory management UIs.
Trading interfaces, portfolio dashboards, compliance portals, customer account views.
Patient portals, clinical dashboards, scheduling interfaces, telehealth platforms.
The exact architecture and delivery plan depend on your environment. These answers describe how OSYSTIC approaches the work.
Yes. We work from your design specifications and advise on implementation feasibility. We are not a design agency — if designs are not ready we cannot start build.
Yes. We start with a codebase audit to understand the current structure and agree on a plan before making any changes.
LCP, CLS, and INP are the three metrics. We address image loading, font rendering, render-blocking scripts, layout shifts, and interaction responsiveness — with before/after measurements for each change.
Yes. Unit tests for logic, integration tests for data flows, and end-to-end tests for critical user paths. Coverage targets are agreed in scoping.
Share your design files and performance requirements. We will come back with an implementation plan and honest timeline.