Custom WordPress Development
Custom WordPress development engineered around your business — not around a template. Lean themes, ACF Gutenberg blocks, custom plugins and clean integrations with the rest of your stack.
- Themes and blocks engineered from scratch to your design
- Custom WordPress plugins for your business logic
- Integrations with CRM, ERP, payments and AI
- Tuned for Core Web Vitals and SEO out of the box
- Long-term maintenance and SLA available
What custom WordPress development covers
Custom Themes
Themes written from scratch to your Figma design — lean, semantic, tuned for Core Web Vitals.
Lighthouse 90+
Custom Plugins
Business logic that no plugin covers: workflows, dashboards, importers, exporters, internal tools.
Only what you need
Integrations
CRM, ERP, payments, shipping, AI, mailing — connected via REST, GraphQL and webhooks.
One clean data flow
ACF Gutenberg Blocks
An editor-friendly block library that lets your team build pages without breaking the design system.
Fast, on-brand publishing
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