IrenicTech

Custom websites and web apps.
Engineered for performance and conversion.

Custom website development agency IrenicTech: marketing sites, web apps, headless CMS, and ecommerce stores engineered for Core Web Vitals, SEO, and accessibility
  • React
  • Flutter
  • Swift
  • Kotlin
  • Next.js
  • TypeScript
  • Node.js
  • Tailwind CSS
  • Express
  • PostgreSQL
  • MongoDB
  • Redis
  • OpenAI
  • Anthropic
  • Hugging Face
  • LangChain
  • PyTorch
  • TensorFlow
  • AWS
  • Google Cloud
  • Microsoft Azure
  • Vercel
  • Cloudflare
  • Docker

IrenicTech web development at a glance

Web development as an engineering discipline. Not a brochure build.

Most agency websites are a theme, a stock photo library, and a Friday-afternoon deploy. They look fine on day one. By month three the Lighthouse score has cratered, the CMS is fighting every customisation, and the SEO depends on whichever plugin was current when the build shipped.

We build custom web development as an engineering discipline. Semantic HTML, schema.org in the data model, Core Web Vitals budgets defended in CI, accessibility verified to WCAG 2.2 AA, and a stack picked for the task instead of for the theme marketplace. The result is a site that stays fast as content grows and stays portable past the next redesign.

The teams we work with want more than a typical custom website development agency that hands over a theme and disappears. They want web software that ranks, converts, and survives the next Google algorithm update without a rebuild.

Productized engagements

Fixed-scope web sprints. Buyable, not negotiable.

Time-boxed, fixed-price, performance-budgeted. Pick the shape that matches what you are scoping. Every sprint hands you the code, the design system, and the deploy pipeline on day one.

  • For founders

    Brand Site Sprint

    From wireframes to a launched marketing site, in four weeks.

    • Brand discovery, IA, and copy structure
    • Design and dev in a single team, no handoff
    • Schema, CWV, and SEO pass before launch
    Book a discovery call
  • For operators

    Web App Sprint

    From spec to a live web app with real users.

    • User flows and technical scoping
    • Vertical slice on your real stack
    • Production deploy with monitoring
    Book a discovery call
  • For legacy stacks

    Migration & Modernization Sprint

    Rebuild from a 2018 stack to a 2026 one without losing rankings.

    • Audit of existing rankings, URLs, redirects
    • Content port + canonical redirect map
    • CWV-tuned rebuild on a stack you actually own
    Book a discovery call

Our web deliverables

  • Brand & marketing sites

    Marketing sites and brand microsites engineered for Core Web Vitals, semantic SEO, and conversion. Custom design system, not a theme.

  • Web apps & dashboards

    Production web apps with auth, role-based access, state management, real-time updates, and the operational plumbing that makes the app safe to ship.

  • Headless CMS builds

    Editorial workflows on Sanity, Strapi, Contentful, or Payload, with a Next.js frontend tuned for ISR, preview, and editorial speed.

  • Ecommerce stores

    Shopify, BigCommerce, or Medusa storefronts with custom theming, headless commerce architecture, conversion funnel tuning, and analytics designed in.

  • Customer portals & dashboards

    Login experiences, account dashboards, subscription portals, and B2B partner surfaces, built on the same stack as the rest of your product.

  • Redesigns & migrations

    Replatform from WordPress, Webflow, or legacy CMS to a modern stack without losing rankings. Redirect maps, content port, parity tests, the lot.

  • Accessibility audits

    Manual + automated WCAG 2.2 AA audits with the remediation work prioritised by user-impact and shipped against a measurable budget.

  • Performance + SEO audits

    Lighthouse, PageSpeed Insights, and Chrome DevTools traces with a remediation backlog ranked by Core Web Vitals impact and search-rank lift.

Template build vs engineered build

Why most websites stop performing six weeks after launch.

Two ways to ship a website. One holds up past launch week. The other does not.

The default pattern

Template-based agency build

A theme, a page builder, and a Friday-afternoon deploy. Looks fine on day one, then drifts as plugins and content stack up.

  • Theme fights every meaningful customisation; the design system is whatever the theme vendor shipped.
  • Lighthouse scores cratered six weeks after launch as plugins stacked up and image budgets slipped.
  • SEO depends on a plugin; the underlying HTML is whatever the page builder generated.
  • Accessibility treated as a v2 task that never lands; WCAG audits surface dozens of violations.
  • Page speed degrades as the content team adds heavier assets; nobody owns the performance budget.
  • You are tied to the CMS the theme was built for; migrating out is a rebuild, not an upgrade.

How we ship

IrenicTech engineering studio

Code-owned stack, CWV budget in CI, schema built into the data model, accessibility verified, performance defended through launch.

  • Code-owned stack chosen for the task: Next.js, custom React, WordPress headless, Shopify, or whatever the brief actually wants.
  • Core Web Vitals budget tracked in CI; LCP, CLS, and INP regressions block deploy the same way failing tests do.
  • Schema.org structured data built into the data model from sprint one; not bolted on by a plugin at the end.
  • Accessibility to WCAG 2.2 AA verified with axe-core in CI and manual screen-reader passes on critical flows.
  • Performance budget defended through launch: image budgets, JS budgets, font budgets, third-party budgets.
  • CMS-agnostic content model; your content stays portable past any future replatform.

Where web development earns its place.

  1. 01 · Marketing

    Landing pages that convert

    Single-purpose landing pages with conversion-tuned IA, schema markup, sub-second LCP, and analytics that tells you which sections actually moved a visitor.

  2. 02 · Product

    MVP web apps for founders

    Auth, account dashboards, payments, and the production plumbing (logging, error tracking, environment promotion) wired in from sprint one so the MVP is investor-demo ready.

  3. 03 · Publishing

    Headless CMS for scale

    Editorial workflows on Sanity, Strapi, or Payload with a Next.js frontend tuned for ISR, preview, and the publishing speed an editorial team actually needs.

  4. 04 · Commerce

    Ecommerce flagships

    Shopify, BigCommerce, or headless Medusa storefronts with custom theming, conversion funnel design, and the merchandising tools the operations team uses every day.

  5. 05 · Operations

    B2B portals and dashboards

    Customer portals, partner surfaces, and internal admin tooling built on the same stack as the marketing site so the design system and auth stay coherent.

  6. 06 · AI-enabled

    AI-native web products

    Web surfaces with AI built in: copilots, retrieval, intelligent search, document upload + analysis. Same engineering discipline as the rest of the stack.

Featured builds

Two web builds. Both shipped to production.

Foodiver food-delivery web platform by IrenicTech, customer app + rider app + backend with live Mapbox tracking

Case study · Marketplace platform

Foodiver

Two-sided food-delivery ecosystem: customer-facing web + mobile, rider app, and an operations backend with live Mapbox tracking. Shipped end to end.

Read case study
Irenicverse browser-native WebGL workplace by IrenicTech, Three.js scene with meeting rooms and team avatars

Case study · WebGL product

Irenicverse

Browser-native WebGL office built in Three.js. Walk through meeting rooms, meet team avatars, and explore project showcases without leaving the tab.

Read case study

Voice of the customer

From founders and engineering leads who own their stack.

  • “The redesign cut LCP from 3.8s to 0.9s. Organic traffic doubled in the next quarter. We have not had to touch the CSS once since handover.”

    Tomás Vega

    Co-founder, Veridia

  • “We took the codebase to our in-house team six months after launch. Zero questions during the handover. Tests passed, CI green, the docs we needed were already written.”

    Hannah Cole

    CTO, Selene Logistics

  • “Three product surfaces shipped at the same release cadence: marketing site, customer portal, internal admin. One stack, one design system, one team. The cohesion shows in the metrics.”

    Jonas Kowalski

    VP Engineering, Cinderhouse

How we ship custom web development.

Six steps from first call to a live website or web app. The discovery brief validates scope before any production code ships; the CWV and accessibility pass gates the launch.

  1. 01

    Discovery & scope

    Stakeholder interviews, brand and content audit, IA workshop, success metrics defined. We leave with a one-page brief, a sitemap, and a scoped vertical slice.

  2. 02

    Design + prototype

    Wireframes, design system, key flows prototyped in Figma. We pressure-test the design against accessibility and performance budgets before any production code ships.

  3. 03

    Vertical slice

    One page or one flow built end to end on the real stack, with CWV, schema, and analytics already wired in. Sets the engineering pattern for the rest of the build.

  4. 04

    Build

    Production build of every page and flow. Component library, CMS schema, design tokens, content authoring tools, and the deploy pipeline.

  5. 05

    CWV, SEO, A11y pass

    Lighthouse + PageSpeed pass against the budget, axe-core accessibility audit, schema validation, redirect map for migrations. Regressions block the launch.

  6. 06

    Launch & ongoing

    Production deploy with monitoring, on-call runbook, content team training, and an ongoing performance + SEO retainer for sites that need it.

Web standards, performance, and accessibility, built in.

WCAG 2.2 AA, Core Web Vitals, OWASP Top 10, schema.org, GDPR cookies, Lighthouse, and MDN-baseline semantic HTML built into the architecture. Not added before a regulator letter or a Lighthouse plummet.

Performance + accessibility audits available as standalone engagements. Bring your live site, leave with a prioritised remediation backlog.

Common questions, answered.

  • What does a custom website cost?

    Brand sites start around $15K for the four-week Brand Site Sprint. Custom web apps run $40K to $250K depending on scope, auth complexity, and the number of integrations. Migrations and replatforms are scoped against the existing site's surface area and ranking risk. Every engagement starts with a fixed-price discovery brief so the bigger number is never a surprise.

  • How long does a typical web build take?

    Brand Site Sprint: four weeks. Web App Sprint: eight to twelve weeks. Migration sprint: six to ten weeks depending on URL count and SEO risk. Production-grade builds with multiple flows and integrations: three to nine months. Continuous improvement: ongoing performance + SEO retainer after launch.

  • WordPress, Next.js, or fully custom: which should we use?

    Depends on the brief. WordPress headless when the content team needs a familiar editor and the site is mostly editorial. Next.js when performance, custom interactivity, or AI integration matter. Shopify when it is commerce-first. Custom React when none of those fit. The discovery brief picks the answer; we just build the architecture to make the choice cheap.

  • Who owns the code and the design files?

    You. From day one. We push to your GitHub organisation, deploy to your infrastructure, hand over Figma in your workspace, and document everything in your wiki. No proprietary platform you cannot leave; no ongoing dependency on us unless you want one.

  • How do you handle SEO and Core Web Vitals?

    Schema.org structured data in the data model, semantic HTML, server-side rendering for indexable content, Core Web Vitals budget tracked in CI, image and font budgets defended through launch, redirect maps for migrations. SEO is engineering work, not a plugin you install before launch.

  • What about ongoing maintenance after launch?

    Three options. Standalone post-launch retainer (security patches, dependency upgrades, content updates). Performance + SEO retainer (quarterly CWV audit, search-rank monitoring, conversion improvements). Or full ongoing product team if the site is a continuously-evolving web app. Pick the shape that matches what is shipping next.

  • Can you migrate our existing site without losing search rankings?

    Yes. Discovery starts with a URL audit, rank-tracking baseline, and a redirect map covering every indexed page. Parity tests verify content survived the move. Staged rollout with monitoring of organic traffic for the first 90 days. The default plan assumes rankings hold or improve; the migration sprint is built around that.

  • Why work with an engineering studio over a freelancer or a big agency?

    Freelancers ship one surface and disappear; big agencies bill for the staffing layer and offshore the build. We are a senior in-house team that ships the surface and stays accountable for it. Same engineers in the discovery call as on the production push. You get the velocity of a freelancer with the engineering rigour of a studio.

Start a conversation

Tell us what you’re building.

Share the essentials and we’ll reply within 4 hours with a real next step, not an auto-responder.

What happens next

  1. We reply within 4 hours, from a real person, not an auto-responder.
  2. A short scoping call to understand the goal, constraints, and timeline.
  3. A fixed-scope discovery sprint: a working prototype and a written estimate.
Email
[email protected]
Phone
+1 504 732 9446
Office
Austin, TX, United States
Hours
Mon–Fri · Async + scheduled calls

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