Andre GuelmannSpeed, stability, and scale that move business metrics.
Modern stack or legacy CMS - when performance, reliability, and SEO need a single technical owner, I optimize your delivery architecture and Core Web Vitals so pages load fast, stay up, and rank - without breaking the roadmap.
✗ LCP 4.1s on mobile
! CLS 0.22 - layout shift
! no CDN caching rules / edge config
→ image pipeline + code splitting
→ Cloudflare rules + RUM
✓ projected: LCP < 2.0s, CLS < 0.1
Slow, shaky pages cost you conversions and rankings on traffic you already earned.
Failing Core Web Vitals
Reliability & incidents
No clean deployment path
Accumulated technical debt
Diagnose the render path. Fix the architecture. Keep it from regressing.
Performance tuned for UX, search visibility, and business outcomes - not vanity scores.
Page speed
Image pipelines, responsive media, code splitting, prefetch/preconnect, and caching - targeting the metrics that actually move LCP, INP, and CLS.
CDN & edge
Cloudflare or Fastly setup, rules, WAF, and APO/Workers/Edge Config so the heavy lifting happens close to the user.
Front-end engineering
HTML/CSS/JS diagnostics, render-path analysis, and bundle hygiene to cut the weight browsers (and bots) have to chew through.
Observability & resilience
RUM, synthetic checks, error tracking, and dashboards - plus runbooks, alerting, SLOs, and post-mortems so issues are caught early.
Faster loads, resilient infrastructure, less firefighting.
- ✓ Core Web Vitals optimization (lab + field) with root-cause analysis
- ✓ Image pipelines, code splitting, caching, prefetch/preconnect
- ✓ CDN/edge setup (Cloudflare/Fastly), WAF, Workers/Edge Config
- ✓ Observability: RUM, synthetic checks, error tracking, dashboards
- ✓ Incident response: runbooks, alerting, SLOs, post-mortems
- ✓ “Fix-first” technical-debt backlog and scalability reviews
Performance pressure changes shape as you scale.
Build on a fast, stable foundation so performance never becomes the reason growth stalls.
Fix the Core Web Vitals and reliability issues that scaling traffic has started to expose.
Harden infrastructure for scale with observability, SLOs, and clean deployment paths across markets.
Operators I've done this kind of work for.
I have been jealous of Andre since we started to work together. As time went by, I realized that he was much more… he literally knew everything about everything… On-page, off-page, strategy, user intent, algorithm updates, content best practices, navigation and website structure, structured data best practices, canonical URL optimization, site speed, AMP, multilingual websites… And the worst thing, I couldn't share my frustration with anyone, because everybody loves Andre.
Andre is very well versed in multiple aspects of online marketing, which turned him into a key player for projects that go beyond SEO and content marketing. Andre excels at taking projects from beginning to end and assuring a high level of execution. I'm confident he'll be a great asset to whichever company or organization he will join.
Very insightful session, grounded advice, has paid off in the long-term for us. Thanks!
Slow or shaky site costing you?
Send me your URL. I'll tell you what's dragging your Core Web Vitals and what I'd fix first.
Book a performance call →