Performance Engineering

Make it 10x faster.

Deep Core Web Vitals engineering for sites and apps that need to feel instant, rank higher, and convert more.

Lighthouse — Mobile
Live
0
Score / 100
LCP
1.1s
-3.5s
TBT
80ms
-1120ms
CLS
0.00
-0.24
0+
Median Lighthouse
0x
Avg. speed gain
0%
TBT reduction
0+
Sites optimized
Real numbers

Before us. After us.

Actual measurements from a recent optimization on a live production e-commerce site.

Performance score
Before
36
After
96
167%
LCP
Before
4.6s
After
1.1s
76%
Total Blocking Time
Before
1200ms
After
80ms
93%
Cumulative Layout Shift
Before
0.24
After
0
100%
Time to Interactive
Before
6.8s
After
2.1s
69%
JS bundle size
Before
840KB
After
210KB
75%
Why it matters

Speed is a growth channel.

Performance isn't a technical concern, it's a revenue lever. Here's what changes when your site gets fast.

Higher rankings

Core Web Vitals are a Google ranking factor. Faster sites climb organic results, period.

More organic traffic

Better UX signals feed back into search and reduce bounce, compounding over months.

Better conversion

Every 100ms shaved off LCP compounds into more paying customers, real revenue impact.

The audit

Where we look, what we fix.

Every performance engagement walks this checklist. Not every site needs every fix, but nothing is skipped by accident.

Bundle & JavaScript
  • Route-level code splitting
  • Lazy-load below-the-fold
  • Remove duplicate deps
  • Ship modern ES only
  • Tree-shake aggressively
  • Compile without polyfills for evergreen
Images & Media
  • Modern formats (AVIF, WebP)
  • Responsive srcset per breakpoint
  • Priority hints on LCP image
  • Poster + lazy video
  • Blur-up placeholders
  • CDN with automatic resizing
Server & Caching
  • Edge caching + stale-while-revalidate
  • Compressed responses (Brotli)
  • HTTP/3 and preconnects
  • CDN for static assets
  • Streaming SSR where it wins
  • Cache-Control tuned per route
Runtime & Rendering
  • Prevent layout shifts
  • Debounced event handlers
  • Minimize re-renders
  • Font-display: optional
  • Web workers for heavy tasks
  • Idle-time hydration
Network waterfall

Every millisecond, accounted for.

Toggle before/after to see how we cut the request timeline in half or more, without breaking a feature.

document
780ms
app.js
640ms
hero.jpg
1240ms
fonts.woff2
420ms
analytics.js
380ms
api/products
720ms
Total load4.6s
Core Web Vitals

The three metrics Google actually ranks on.

LCP
< 2.5s
Largest Contentful Paint

How fast the biggest thing on screen shows up. Perception of speed.

INP
< 200ms
Interaction to Next Paint

How snappy the page feels when you click, tap, or type.

CLS
< 0.1
Cumulative Layout Shift

How much the page jumps around as it loads. Zero is heaven.

Process

How we get from kickoff to launch.

Day 1

Deep audit

Lighthouse, WebPageTest, real-user monitoring, and code review to find the real bottlenecks.

Day 2

Prioritized plan

Findings ranked by impact-per-hour. You approve the plan before we touch code.

Week 1–2

Ship the fixes

PR by PR, with before/after numbers on each. No 'refactor everything' theater.

Deploy

Zero-regression release

Canary rollout with real-user monitoring so we catch regressions before you do.

Ongoing

Monitor + guard

CI-integrated Lighthouse checks so every future PR keeps the numbers green.

Proof

Recent work in this practice.

FAQ

Performance questions, answered.

Ready to go faster?

Send us your slowest page. We'll tell you exactly what's costing you seconds.

60-minute discovery call. No slides, no sales pitch, just a working session.