WordPress Development Services
We are an enterprise WordPress development agency. We build custom WordPress and WooCommerce sites, integrate them with your business systems, and maintain them long-term — for B2B and enterprise clients across the EU, UK and Nordics.
- Custom WordPress development — no templates, no plugin sprawl
- WooCommerce development services with B2B & ERP integrations
- Headless WordPress with React / Next.js front-ends
- WordPress migration, speed optimization and security hardening
- WordPress maintenance services and support under SLA
- 20+ years experience · 200+ projects · EU, UK and Nordic clients
Our WordPress Development Services
End-to-end WordPress and WooCommerce engineering — from architecture and build to long-term maintenance.
Custom WordPress Development
Bespoke themes, ACF-driven Gutenberg blocks, custom plugins, REST/GraphQL APIs — engineered to your business, with no template bloat or plugin sprawl.
Fast, secure, fit-to-purpose
WooCommerce Development Services
Custom WooCommerce stores, B2B pricing, subscriptions, ERP sync, multi-currency and multi-language commerce, complex checkout and shipping flows.
Enterprise-grade e-commerce
Headless WordPress Development
WordPress as a headless CMS with a React or Next.js front-end via WPGraphQL — better performance, better Core Web Vitals, easier app integrations.
SPA performance, familiar editor
WordPress Migration Services
Migrate from other CMS platforms, change hosts, upgrade core versions, consolidate plugins and refactor legacy code — with zero downtime cutovers.
Safe migration, no downtime
WordPress Speed Optimization
Core Web Vitals tuning, image and CDN optimisation, caching architecture, query refactoring and plugin audits.
PageSpeed 90+ and stronger SEO
WordPress Maintenance & Support
Core, theme and plugin updates, security monitoring, backups, uptime checks and on-call fixes under a clear SLA.
Reliable, secure, hands-off
About Synergy Effect
- Lithuania-based enterprise technology agency, founded in 2003.
- 20+ years of experience in WordPress, WooCommerce and custom web engineering.
- 200+ delivered projects and 50+ enterprise clients across Lithuania, the EU, the UK and the Nordics.
- In-house team of architects, full-stack engineers, DevOps, security specialists and AI engineers.
- GDPR-aligned hosting, signed DPAs and SLAs available in English.
- Offices in Vilnius, Kaunas and London — full European business-hours coverage.
When to choose us
- You need a long-term WordPress / WooCommerce partner, not a one-off job
- You want custom functionality (B2B pricing, ERP sync, AI features) that no plugin covers
- Security, GDPR and enterprise-grade SLA matter to you
- You need headless WordPress or a React / Next.js front-end engineered properly
- You value a documented process: discovery → build → UAT → SLA
When NOT to choose us
- You need a cheap template install in a few days — a freelancer will be cheaper
- You want a single "fix this plugin" job with no follow-up scope
- You only need hosting — we are an engineering team, not a host
Freelancer vs generic agency vs Synergy Effect
How WordPress and WooCommerce service levels differ by partner type.
| Capability | Freelancer | Generic agency | Synergy Effect |
|---|---|---|---|
| Custom WordPress development (no templates) | |||
| WooCommerce with B2B pricing and ERP sync | |||
| Headless WordPress (React / Next.js) | |||
| SLA with guaranteed response time | |||
| GDPR / DPA documentation | |||
| 24/7 uptime monitoring and on-call | |||
| Security incident response | |||
| AI features integrated into WordPress | |||
| Team > 1 person (architect + dev + DevOps) |
Yes · Partial · No
WordPress glossary
Short definitions of terms that come up in WordPress and WooCommerce projects.
- Headless WordPress
- An architecture where WordPress is used only as a content management system (CMS), while the public front-end is a separate React or Next.js app consuming data via WPGraphQL or REST API.
- WordPress SLA
- Service Level Agreement — a contract that fixes incident response time, uptime guarantee, update cadence and backup restore window for a WordPress site.
- Core Web Vitals
- Google's user-experience metrics (LCP, INP, CLS) that directly affect WordPress SEO rankings and conversion rates.
- WAF
- Web Application Firewall — a security layer in front of WordPress that blocks SQL injection, XSS and brute-force attacks before they reach PHP.
- WooCommerce B2B
- A WooCommerce configuration for business buyers: role-based pricing, quote requests, credit terms, ERP-driven price lists and multi-buyer accounts.
- ACF Gutenberg Blocks
- Editor blocks built on Advanced Custom Fields that let editors compose pages without breaking the design system.
Our WordPress Tech Stack
Read more: Headless CMS: React, Next.js and WordPress