Website Speed Optimisation Services

Pass Core Web Vitals, score 90+ on Lighthouse, and recover lost rankings. LCP, CLS and INP fixes for WordPress, Shopify, Magento, React, Next.js — by senior engineers.

Book a Free Strategy Call Get a Custom Proposal

120+ Projects
4.9★ Google Reviews (180+)
9+ Years in Business
WCAG 2.2 AA Compliant
90+ Lighthouse Default
24/7 Support

What do we do?

Pain points we solve

Is Your Speed Optimisation Costing You Customers Every Day?

Most businesses lose customers every day to speed optimisation that does not perform. If any of these sound familiar, you are losing revenue right now:

• Failing Core Web Vitals affecting Google rankings
• Slow mobile load times (LCP > 4 seconds)
• High Cumulative Layout Shift (CLS) frustrating users
• Slow interactivity (INP > 500ms) hurting engagement
• Heavy theme + plugin combos dragging WordPress speed
• Third-party scripts (chat, analytics) blocking page load

Every one of these is solvable. Most are solvable inside the first 8 weeks of the right engagement.

Learn More →

Services

What this service includes

Our website speed optimisation services — 8 Lightning Solutions

We deliver website speed optimisation services for SaaS startups, ecommerce brands, healthcare providers, fintech and growing professional services firms. Every engagement is led by senior engineers — never juniors — and ships with conversion optimisation, SEO and accessibility built in from sprint one.

What you get under one roof:

1. Core Web Vitals audit (LCP, CLS, INP)
2. Image optimisation and modern formats (WebP, AVIF)
3. JavaScript and CSS optimisation
4. Server-side caching and CDN setup
5. Database and query performance tuning
6. Critical CSS and resource hints
7. Third-party script audit and reduction
8. Real User Monitoring (RUM) setup

Every deliverable is documented, transferable and yours to keep.

Outcomes

Benefits you can expect

What You Get When You Hire Coding Flex

We measure success by what your business gains, not by what we ship. Clients typically see:

• 2–4× more qualified leads from organic search
• 90+ Google Lighthouse scores on launch day
• Higher conversion rates from CRO-tested layouts
• WCAG 2.2 AA compliance that opens enterprise procurement
• Faster shipping — weekly releases instead of quarterly
• Full code, repository, hosting and domain ownership from day one
• Senior engineers in your Slack — not pitch-and-switch
• Predictable maintenance costs and a documented roadmap
• Long-term ROI: lower TCO, higher revenue per visitor

How it works

How we work together

Discovery Call

We map your goals, current stack, audience and constraints. You leave with a written summary inside 24 hours — even if you do not hire us.

Free, 30–60 min

Research & Strategy

Competitor audit, content audit, technical spike, written architecture document and a fixed-scope proposal.

Week 1–2

Design / Plan

Wireframes, mood boards, prototypes, accessibility review and stakeholder approval before any code or campaign launch.

Week 2–6

Build / Execute

Fortnightly sprints with named senior specialists, daily Slack, live staging, code review and automated testing.

Week 5–14

QA, Review & Launch

Lighthouse, axe-core accessibility, manual QA, security review, zero-downtime cutover and a documented handover.

Week 12–16

Optimisation & Ongoing Support

6 weeks of free post-launch fixes, weekly performance reviews and an optional retainer for continued improvement.

Why choose us

Why choose Coding Flex

Why 120+ Businesses Choose Coding Flex for Speed Optimisation

• 9+ years building production systems for SaaS, ecommerce, healthcare and B2B
• Senior-only delivery — every team member averages 8+ years of experience
• Fixed-scope quotes inside 24 hours of the discovery call
• WCAG 2.2 AA accessibility baked into every deliverable
• Direct Slack access to your team — no account managers, no ticket queues
• Monthly executive reports tied to traffic, conversions and revenue
• Full IP, repository, hosting and domain transferred on day one
• 85%+ client retention rate (industry average is around 60%)

Case studies

Portfolio & case studies

Recent Speed Optimisation Wins

Case Study 1 — SaaS dashboard rebuild
Stack: Next.js + Laravel + Postgres
Result: Lighthouse 38 → 96, organic traffic +180% in 6 months, sign-ups +42%

Case Study 2 — DTC headless storefront
Stack: Hydrogen + Shopify Plus
Result: Page speed 1.2s → 0.4s, conversion rate +28%, AOV +12%

Case Study 3 — Healthcare booking system
Stack: Laravel + Vue + AWS
Result: WCAG 2.2 AA compliant, 4× faster appointment flow, -60% support tickets

No portfolio items published yet.

See the full portfolio with 30+ before/after metrics → →

Testimonials

Client testimonials

What Our Clients Say

“Coding Flex delivered our speed optimisation in 9 weeks. The results spoke for themselves — sign-ups up 42% and paid CAC down by a third. The only agency that has felt like a real partner.”
— Sarah Linton, Co-founder, TimelyLabs (B2B SaaS)

“We hired Coding Flex for speed optimisation after two other agencies disappointed. Our conversion rate jumped 28% in the first quarter. Fast, senior, honest about trade-offs.”
— Marcus Bailey, Head of Ecom, North&Wilde (DTC fashion)

“Accessibility audits used to terrify us. Coding Flex made our system WCAG 2.2 AA compliant and faster at the same time. Best engineering partner we have worked with.”
— Dr. Anya Kapoor, Director, ClearPath Health

No testimonials published yet.

Verticals

Industries we serve

Industries We Serve with Speed Optimisation

We adapt craft and tone to each industry while keeping the rigour identical:

• SaaS & B2B Technology
• Ecommerce & DTC Brands
• Healthcare & Telemedicine
• Real Estate & Property Tech
• Fintech & Financial Services
• Education & EdTech
• Hospitality, Travel & Restaurants
• Law Firms & Professional Services
• Manufacturing & Industrial B2B
• Non-Profits & Government Suppliers

Pricing plan

Indicative pricing

Transparent, Outcome-Based Pricing for Speed Optimisation

We publish three indicative pricing tiers so you can self-qualify before booking a call:

Every quote is fixed-scope. No hourly surprises. No hidden fees. Custom retainers available for ongoing optimisation.

FAQ

Do you have any questions?

Frequently Asked Questions

Can you fix our slow WordPress site?

Yes. Most WordPress speed issues come from heavy themes, bloated plugins, un-optimised images and weak hosting. We address all four.

How fast can a site really be?

Lighthouse 90+ mobile is achievable for most sites. 95+ is achievable for well-architected ones. 100 mobile is achievable for static sites.

How long does speed optimisation take?

Audit: 1 week. Quick wins: 2–3 weeks. Full optimisation programme: 6–10 weeks.

How much does speed optimisation cost?

Audit only: USD 1.5–4K. Full optimisation programme: USD 6–25K. Ongoing performance retainer: USD 1–3K/month.

Will this improve SEO rankings?

Often yes — particularly for borderline-ranking pages where Core Web Vitals are a tie-breaker. Direct SEO impact varies by niche.

Do you work with all platforms?

Yes — WordPress, Shopify, Magento, WooCommerce, Webflow, Wix Studio, React/Next.js, custom builds.

Get started

Ready to Grow With Speed Optimisation?

Let's discuss your goals on a free 30-minute strategy call. You will leave with a written roadmap — whether you hire us or not.

Book My Free Strategy Call →Get a Custom Proposal →See Live Projects →

Insights

Website Speed Optimisation Services for Growing Businesses

Website speed optimisation services have become essential as Core Web Vitals consolidate their role in Google's ranking algorithm. Sites failing LCP, CLS or INP thresholds see compounding ranking pressure, while sites that pass with margin pick up tie-breaker advantages in competitive SERPs. Beyond rankings, slow sites cost conversion rate — Amazon's classic data showed every 100ms of latency cost 1% in sales, and the impact only intensifies for mobile users on slower connections. Coding Flex runs website speed optimisation engagements for WordPress, WooCommerce, Shopify, Shopify Plus, Magento, Webflow, Wix Studio, React, Next.js and custom-built sites. Every engagement starts with a Core Web Vitals audit covering Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP), plus broader Lighthouse performance, accessibility, best practices and SEO scores. We use real-user monitoring data from Chrome User Experience Report (CrUX) where available, supplemented with synthetic testing across mobile and desktop. The audit identifies the specific bottlenecks: render-blocking resources, large unoptimised images, heavy JavaScript bundles, slow server response times, layout shifts from unset image dimensions, slow third-party scripts (chat widgets, analytics, ad tags), inefficient database queries, missing browser caching, missing CDN distribution. Remediation includes image optimisation (WebP/AVIF conversion, responsive serving, lazy loading), JavaScript optimisation (code splitting, deferring, removing unused code), CSS optimisation (critical CSS extraction, removing unused styles), server-side caching, CDN deployment (Cloudflare, BunnyCDN, AWS CloudFront), third-party script audit and reduction, font optimisation (preloading, subsetting), and platform-specific tuning (WordPress object caching, Shopify Liquid optimisation, Magento Varnish caching). Every optimisation engagement ends with verifiable performance metrics — before-and-after Lighthouse reports, Search Console Core Web Vitals confirmation after the 28-day field-data refresh window, and ongoing Real User Monitoring setup so performance is tracked permanently.