Marketing sites and web apps that compound, not decay
We build storefronts, marketing sites, and web applications that ship fast and stay fast. Conversion-engineered from the page down to the data layer, with measurement baked in, not bolted on.
tengenx · web platform
LiveWeb platform overview
Storefront · CMS · Pages · Measurement
Storefront
Pages
Content model
Measurement
LCP target
<1.5s
Lighthouse
95+
A/B tests / mo
2–4
2M+
Records migrated on Promescent
5+
Sales channels unified
<1.5s
Target LCP on rebuild projects
Where this fits
Built for the moments you can't postpone
We don't take work just to take work. This service exists because the problems below are the ones we keep being hired to solve, and the ones we've shipped through more than once.
- Marketing site is slow, dated, and impossible for marketers to update without a developer
- Storefront sits on a heavy theme, every release feels risky and slow
- Built on Magento / WordPress legacy, paying maintenance tax for diminishing returns
- Funnels, lifecycle, and analytics live in islands no one fully owns
- Need a re-platform without losing SEO equity, redirects, or historical orders
- Roadmap stalls because every new page goes through engineering
What we ship
Solutions, not slide decks
Each line below is a real deliverable shipped on past engagements, with an honest scope and a metric where it makes sense.
01 / Scope
Marketing site rebuild
Component-driven build on Astro or Next.js with a content model your marketers can actually use. Edit, preview, ship, no PRs required.
02 / Scope
Storefront engineering
Shopify Plus or headless commerce with a conversion-engineered theme: PDP / cart / checkout flows tested against the buyer's actual path.
03 / Scope
Re-platform & migration
Magento → Shopify, WordPress → Astro, monolith → headless. We move data, redirects, SEO equity, and historical orders intact.
04 / Scope
Web applications
Customer dashboards, account portals, and authenticated tools, built on the same modern stack, with auth, billing, and roles wired in.
05 / Scope
Performance & SEO
Core Web Vitals budget, structured data (Schema.org / LD+JSON), image pipeline, edge rendering. The boring work that compounds.
06 / Scope
Landing-page system
A reusable template library so marketing can launch a new campaign page in hours, A/B test it, and roll it back without engineering.
How we work
A delivery rhythm you can forecast
No mystery sprints. Each phase has a real artefact at the end of it, and you'll always know what's coming next.
- 01 Week 0
Discovery
30-min call + a written architecture / scope brief. No deck, no handwaving.
- 02 Week 1–2
Design system
Tokens, layout grid, key page templates, component-by-component, not a theme.
- 03 Week 2–6
Build & integrate
Pages, CMS, integrations (commerce, CRM, analytics) shipped behind a staging URL.
- 04 Launch week
Cutover
Redirect map, SEO checks, perf audit, GA4 / GTM verification, then DNS flip.
- 05 Month 2+
Iterate
Monthly CRO + roadmap cycle so the site keeps earning, not just sitting there.
Engagement
Pick the shape that fits, we'll suggest the rest
We don't pretend one engagement model fits everyone. Pick the closest, and we'll right-size on the call.
Industries we ship for
Fixed-scope build
Best for a defined launch, a marketing site rebuild, a re-platform, a landing-page system. Scope is locked, milestones are written down, and we ship to it.
- Architecture + design system
- Build, CMS, integrations
- QA + cutover with redirects
- Lighthouse / SEO sign-off
Indicative
$25k–$120k
Timeline
4–10 weeks
Continuous delivery retainer
Once the site is live, we keep shipping. Pages, A/B tests, perf budgets, lifecycle integration, under one monthly envelope with a backlog you control.
- Pages + CRO sprints
- Perf + SEO maintenance
- Analytics + dashboard upkeep
- Quarterly roadmap review
Indicative
From $9k / mo
Timeline
Rolling, 3-month minimum
Audit + advisory
An honest teardown of the current site, perf, SEO, CRO, content model, dev velocity, and a written 90-day plan you can run yourself or hand back to us.
- Full audit document
- Prioritised 90-day plan
- Stakeholder readout call
- No upsell pressure
Indicative
From $4k
Timeline
1–2 weeks
Stack
The tools we reach for
We're not religious about tools, these are the ones we know deeply enough to ship and operate without surprises.
Frameworks
Commerce & CMS
Performance & SEO
Analytics & growth
Hosting & infra
Common questions
Honest answers, no sales theatre
Can you redesign our existing site without losing SEO equity?
Yes, that's the most common engagement. We build a redirect map from the existing URLs, preserve metadata and structured data, and keep historical content addressable. We've done this on sites with deep editorial archives and on commerce stores with millions of historical orders.
Do we have to switch CMS / commerce platforms?
Not unless the current platform is the bottleneck. We'll be honest about it. Sometimes the fix is a new theme on the existing stack; sometimes it's a re-platform. The audit is built to answer that question without you having to commit to a build.
Can the marketing team actually update the site afterwards?
Yes, that's a hard requirement on every build. Page templates are reusable, the CMS uses friendly fields (not raw markdown), and we hand over a short Loom + written guide. If your team can't ship a new page without us, we built it wrong.
How do you handle Core Web Vitals and SEO?
We treat Lighthouse and CWV as launch-blocking. Image pipeline, edge rendering, JS budget, structured data, sitemap, and Search Console wiring are part of the build, not a follow-up engagement. We'll show you a green Lighthouse report before we hand over.
Do you do A/B testing and CRO after launch?
Yes, usually as a continuous delivery retainer. Each test ships with a written hypothesis, a measurement plan, and a rollback path. We don't run experiments without an instrumented funnel underneath them.
Ready when you are
Let's ship a site that earns its keep .
Tell us what you're building or rebuilding. We'll come back with a clear scope, a phased plan, and a transparent estimate, usually within a couple of business days.