Services / Web UX Engineering
Interface Design & CRO

Beautiful interfaces only matter if they actually convert.

Most UX work stops at how it looks. We start from where users drop off — and engineer every screen, flow, and interaction to eliminate that friction and turn visits into revenue.

+74%Avg. conversion lift
0.8sCore Web Vitals target
ux.digitalzenith.world/audit/overview
UX Audit — Conversion Analysis
Live Session
LCP
0.8s
CLS
0.02
Conv. Rate
6.1%
Drop-off
−74%
CTA above fold — friction removed at checkout step 2
Form field reduction: 9 → 4 fields, +38% completion
+74%Avg. conversion rate lift
−62%Checkout drop-off
0.8sLCP target (Core Web Vitals)
< 6 wksTo first A/B test live
Digital Zenith UX engineering team reviewing wireframes and user flow diagrams
Heatmap Analysis Active
The UX Standard

Every pixel justified by data — not design opinion or client preference.

We don't redesign pages because they look dated. We redesign them because session recordings, heatmaps, and funnel data tell us exactly where users are leaving money on the table. The aesthetic follows from that evidence — not the other way around.

Evidence

Drives Every Design Decision

< 6 weeks

First Test Live
Our philosophy

Good UX is invisible. Bad UX shows up in your conversion data.

Most UX projects start with a mood board and end with a redesign that launches to applause — and then sits untouched for three years while conversion rates drift. We do it differently. Every engagement starts with a diagnostic: where are users dropping off, why, and what would need to change for them not to.

That diagnosis shapes everything. The design, the copy, the interaction patterns, the page speed targets — all of it is traced back to a specific drop-off point or friction measurement. We build what the data asks for, test it against the current version, and don't declare a win until the numbers confirm it.

Before vs After — Typical UX engagement
Conversion RateBefore: 1.8% → After: 6.1%
Checkout Drop-offBefore: 74% → After: 28%
Page Load (LCP)Before: 4.2s → After: 0.8s
Form Completion RateBefore: 31% → After: 69%
Mobile Usability ScoreBefore: 58/100 → After: 96/100

Aggregated across 11 UX projects in 2024–25. Individual results vary by industry, baseline conversion rate, and traffic volume.

What's included

From diagnostic audit to a tested, high-converting interface.

We don't hand off a Figma file and disappear. We build, test, and iterate until the metrics move — then document what worked so results compound.

UX Audit & Funnel Diagnostics

A structured teardown of your current user flows — heatmaps, session recordings, funnel analysis, and user testing — to identify the exact pages and friction points costing you conversions. Most audits surface 4–6 high-impact fixes within the first two weeks.

HeatmapsSession recordingsFunnel analysis

Information Architecture & Wireframing

We restructure page hierarchy, navigation patterns, and content prioritisation before a single line of production code is written. Low-fidelity wireframes reviewed and approved with you — so the build phase doesn't surface structural surprises.

IA mappingWireframingUser flow design

Responsive Interface Design

High-fidelity UI designed mobile-first, tested across device breakpoints, with component-level documentation for your dev team. Every design decision is traceable back to a finding from the diagnostic phase — not aesthetic preference.

Mobile-firstDesign systemComponent library

Core Web Vitals & Performance

We engineer page performance into the build — image optimisation, render-blocking elimination, lazy loading, and CDN configuration — targeting LCP under 1s and CLS under 0.05. Speed isn't a post-launch fix; it's a design requirement from day one.

Core Web VitalsLCP / CLS / FIDPage speed

A/B & Multivariate Testing

We instrument every significant change as a controlled experiment — headline variants, CTA placement, form length, checkout flow — and let statistical significance determine the winner. No HiPPO decisions; the data decides.

A/B testingMultivariateStatistical significance

Accessibility & WCAG Compliance

Accessible design isn't a legal checkbox — it's better UX for everyone. We audit and build to WCAG 2.1 AA, covering keyboard navigation, colour contrast, ARIA labelling, and screen reader compatibility, without compromising the visual design.

WCAG 2.1 AAScreen readerKeyboard nav
How it works

From diagnostic to a tested, live interface — exactly how we do it.

No redesigns launched on gut feeling. Every phase has a clear output and a clear reason to proceed before the next phase begins.

01

Discovery & UX Audit

We install Hotjar (or your existing analytics stack), pull session recordings and heatmaps across your highest-traffic pages, and map the drop-off points in your conversion funnel. Combined with a 90-minute kickoff to understand business context and conversion goals. Deliverable: a written audit with ranked findings and a hypothesis for each fix.

Session analysisHeatmap reviewFunnel mappingRanked findings
02

Information Architecture & Wireframes

We restructure page hierarchy and user flows based on the audit findings — before opening a design tool. Low-fidelity wireframes are reviewed with you and signed off before any high-fidelity work begins, so structural decisions don't get revisited in the final stretch when they're expensive to change.

IA restructureUser flow diagramsWireframesClient sign-off
03

High-Fidelity UI Design

Full visual design across all pages and breakpoints, built on a component system that your engineering team can implement and extend. Copy is written alongside design — not retrofitted afterward — so message hierarchy and reading flow are engineered together, not bolted on.

UI designComponent libraryDesign tokensCopy integration
04

Build & Performance Engineering

We build to production or hand off to your team with a detailed implementation spec. Either way, performance targets are set and enforced: every page is tested against Core Web Vitals before launch, and anything that misses the LCP target gets fixed before go-live — not scheduled as a post-launch task.

Production buildCore Web VitalsCross-device QAAccessibility audit
05

A/B Testing & Iteration

The launch is the beginning of the engagement, not the end. We run structured A/B tests against the original, track statistical significance, and iterate on losers fast. Most pages go through two to three test cycles before results stabilise — that's where the bulk of conversion gains come from.

A/B test setupStatistical trackingIteration cyclesWinner documentation
06

Handoff & Ongoing Optimisation

Everything is documented — design rationale, test results, component specs, and the data behind every decision — so your team can maintain the system and future designers or developers understand why choices were made. Ongoing CRO retainers keep testing running and compound the conversion gains past the initial engagement.

Design documentationTest results archiveCRO retainer optionKnowledge transfer
Recent work

What it looks like when UX and engineering actually work together.

Two projects — a SaaS product onboarding flow and an e-commerce checkout — where the design was led entirely by what the data said users needed.

SaaS · Onboarding Flow Redesign

Stackpath — SaaS Platform Onboarding

Session recordings showed 67% of new signups abandoning the onboarding wizard at step 3 of 7. Audit found step 3 required credit card entry before any product value was demonstrated. Redesigned to defer payment, compress steps from 7 to 4, and surface first value moment within 90 seconds of signup.

+91%Trial activation rate
−67%Onboarding drop-off
5 wksDesign to live
E-commerce · Checkout UX & Performance

Kroft & Vale — DTC Furniture

Checkout page loading at 5.8s on mobile; 78% cart abandonment rate. Rebuilt checkout as a single-page flow with progressive form validation, reduced fields from 12 to 5 using address autocomplete, and brought LCP to 0.9s. Ran A/B tests on trust signal placement across four variants over six weeks.

+74%Checkout completion
0.9sMobile LCP
6 wksTime to results

Tools & platforms we work with

We're tool-agnostic — we use whatever gives us the clearest signal about what users are actually doing, not what's easiest for us to report on.

Hotjar
FullStory
GA4 / GTM
Figma
Maze
VWO
Optimizely
PageSpeed Insights
Lighthouse CI
Webflow / React
Client stories

From the products we've made better

Every agency we'd tried before wanted to start with a mood board. Digital Zenith started with a Hotjar session of actual users struggling with our checkout. Within two weeks we had a list of problems more valuable than anything we'd ever got from a design brief.
LN
Lena Nguyen
Head of Product, Kroft & Vale
Our onboarding completion went from 33% to 63% in the first test cycle. The change they made — removing card entry from step 3 — seems obvious in retrospect. But we'd never have found it without someone actually watching users drop off and asking why.
JK
James Kowalski
CEO, Stackpath
Page speed was something we'd always meant to fix but never prioritised. Digital Zenith treated it as a design requirement, not a developer cleanup task. Our mobile LCP went from 5.1s to 0.9s and we saw a measurable bounce rate drop the week it shipped.
RA
Ria Anand
Growth Lead, Luminex Health
Investment

Project-based pricing. No vague retainer, no scope creep.

Each engagement is scoped to your current conversion problem — audit, design, build, or the full cycle. You know what you're getting before we start.

Audit Sprint
$2,200one-time

A two-week diagnostic of your highest-traffic pages — funnel analysis, session recordings, and a prioritised action plan you can execute yourself or hand to us.

Heatmap & session recording analysis
Funnel drop-off mapping
Core Web Vitals audit
Ranked findings + hypothesis doc
60-minute debrief call
Get started
Full Build
Let's scope it

Design and full production build — for teams who want a finished, tested, performant product without managing a separate dev agency.

Everything in Design & Test
Full production engineering
CMS integration & component library
Ongoing CRO retainer available
Priority support & handoff
Talk to us
FAQ

Questions we get before every engagement.

If your question isn't here, book a 30-minute call — we'll tell you honestly whether your conversion problem is a UX problem or something else.

Do we need to redesign the whole site, or can you fix specific pages?

Usually specific pages. A site-wide redesign is rarely the right answer when the problem is a specific drop-off in your checkout, onboarding, or landing page flow. We start with a diagnostic to find where the friction actually is — most of the time, fixing two or three high-impact pages delivers more conversion gain than rebuilding everything at once.

What if we don't have much traffic to run A/B tests?

Below around 1,000 monthly visitors on the page being tested, A/B tests take too long to reach statistical significance to be practical. In that case, we rely more heavily on qualitative methods — user testing sessions, session recordings, and expert heuristic review — which give strong directional signal even without high traffic volume. The diagnostic approach is the same; the evidence type changes.

How long does a UX engagement take?

The audit sprint is two weeks. A full Design & Test engagement runs eight to twelve weeks: two weeks for audit and wireframes, three to four weeks for design, two weeks for build and QA, then a rolling 60-day A/B testing program. The testing phase is where results compound, so we don't cut it short — but you'll typically see early conversion movement within the first 30 days after launch.

Do you build the designs, or just hand off to our dev team?

Either. Our Design & Test tier produces design files, annotated specs, and a component library your team can implement. Our Full Build tier includes production engineering — we hand you a tested, performant, live site. Most clients choose based on their dev team's capacity and timeline, not on which option they think is higher quality.

What if our brand guidelines are very strict — will UX testing override them?

Brand guidelines exist for good reasons and we work within them. What we test is structure, copy, hierarchy, and interaction — not logos, core brand colours, or typography. Our experience is that most conversion problems are structural, not visual: the wrong CTA placement, too many form fields, a trust signal missing at the critical decision moment. None of that requires breaking your brand.

Ready to find out where users are leaving?

Let's look at your funnel together and find out what's costing you conversions.

Book a 30-minute call. We'll review your current conversion data, identify the highest-impact pages to fix first, and tell you exactly what we'd audit — no obligation.