Custom React and Next.js web applications engineered for performance from day one — for SaaS platforms, dashboards and high-traffic sites across India that can't afford a slow front end.
Most "slow React sites" we get called in to fix aren't slow because React is slow — they're slow because nobody enforced a performance budget: bloated bundles, unoptimized images, render-blocking scripts and client-side rendering done in a way that leaves Google unable to see the content at all. The result is the same whatever the stack: poor Core Web Vitals, weak organic visibility, and a web app that feels sluggish the moment a real visitor loads it on a real connection. In one Next.js performance rebuild for a SaaS company, that exact combination was dragging homepage load time to 9 seconds — we rebuilt it properly and cut load time to 1.4 seconds and bounce rate by 46%. Read the full case study →
Dashboards, portals and internal tools built as proper software, not a template stretched past its limits — component-driven, state managed cleanly, and built around your actual workflows.
Server-side rendering, static generation or incremental regeneration — chosen per page, so marketing and content pages get indexed and rank while app pages stay fast and interactive.
Your marketing team keeps the ability to edit content without a developer, while the front end stays as fast and flexible as a fully custom build.
Your React front end connected cleanly to whatever powers the business behind it — your own backend, a third-party API, or services we build alongside it.
Speed treated as a build requirement, not a post-launch fix — every project ships against a performance budget, not just a design mockup.
Built so the next feature — or the next developer — doesn't have to reverse-engineer your codebase to move forward.
Dashboards, portals and internal tools with real logic and state — the kind of interactivity a CMS theme was never built to handle.
When every extra second of load time has a measurable cost — in bounce rate, in ad Quality Score, in trial signups — and a WordPress theme's overhead isn't acceptable.
Custom code rewards teams that can maintain it. If you have (or plan to hire) engineers, a custom stack gives you far more room to grow than a plugin-dependent build.
If you just need a content-led marketing site your own team can edit day to day, WordPress is usually the simpler, cheaper choice — see our Business Website Design services.
"Most agencies vanish post-launch. ZielDigital set up training, handed us full ownership of the code, and their support plan means fixes happen same-day."
This is the same Next.js performance rebuild referenced above — a full front-end rebuild, Core Web Vitals pass and a documented code handover so the client's own team could take over confidently. Read the case study →
Requirements, data sources, integrations and a rendering strategy per page (SSR, SSG or ISR).
UI design in Figma with a component system defined up front, not improvised mid-build.
Development in sprints, with code review and Core Web Vitals checked continuously, not bolted on at the end.
QA across devices and networks, documented handover, and real-user monitoring after go-live.
A focused marketing rebuild on Next.js typically ships in 6–8 weeks; full web applications run 10–16+ weeks depending on scope. We scope and fix the timeline after discovery, before any code is written.
Custom React and Next.js builds like this are scoped individually based on complexity — they sit above our standard fixed-price tiers. See our website packages & pricing →
React is a JavaScript library for building user interfaces — it handles components and state, but leaves routing, rendering strategy and build tooling up to you. Next.js is a framework built on top of React that adds all of that: server-side rendering, static generation, routing and performance optimizations out of the box. Most new projects we build use Next.js precisely because it solves the SEO and speed problems plain React apps often struggle with.
A plain client-side-rendered React app can genuinely hurt SEO, because search engines may struggle to see content that only appears after JavaScript runs in the browser. Next.js solves this by rendering pages on the server or at build time, so Google gets fully-formed HTML just like it would from any other site. Used correctly, a React/Next.js site can rank exactly as well as a traditional CMS — the framework isn't the risk, the implementation is.
Only if non-technical people need to edit content without a developer. If your site is mostly application screens with little editable content, plain code is often simpler. If marketing pages, blog posts or product listings need regular updates, we wire in a headless CMS so your team keeps editorial control while the front end stays fast and custom.
Yes — this is a large part of what React and Next.js are actually for. Dashboards, customer portals, internal tools and SaaS front ends are all things we build regularly, connected to your own backend or third-party APIs as needed. If your project needs real functionality and state, not just pages of content, this is the right stack for it.
Through discipline that has to be built in from the start, not retrofitted later: a documented, reusable component library, consistent coding conventions, sensible folder structure, and a proper handover so your team (or the next developer) isn't reverse-engineering the codebase. You own the code and documentation from day one — there's no dependency on us to keep it running.
Tell us what you're building — we'll review your requirements, recommend the right rendering and CMS approach, and send a fixed quote with timeline within 24 hours. No obligation.
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