Your WordPress site should win you customers, not load slowly, break on mobile, or look like every other template. I build fast, high-converting WordPress and WooCommerce sites for businesses across the EU and US, and I can go full-stack (React, Laravel, headless) when a project needs more than a page builder.
I'm Jari, an EU-based developer in the Netherlands with an engineering degree and 5+ years building and fixing WordPress, WooCommerce, custom themes and plugins, Laravel apps and Magento stores.
✅ 𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼
• Custom WordPress and WooCommerce sites that are fast, clean and easy to manage
• Speed and Core Web Vitals optimization (real fixes, not just a caching plugin)
• Conversion-focused builds and redesigns that drive leads and sales
• Headless WordPress (WP + React/Next.js) and custom PHP/Laravel when you need it
• Bug fixes, rescue jobs, migrations and ongoing maintenance/care plans
✅ 𝗪𝗵𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗵𝗶𝗿𝗲 𝗺𝗲
• I find the real problem first. I don't bolt on 15 plugins to fix what one clean solution handles.
• EU-based, so you get full timezone overlap with European clients, afternoon overlap with the US, and your data stays under EU/GDPR jurisdiction by default.
• Native Dutch, fluent English, conversational French and German, so communication is clear and fast with no language friction.
• Engineering background, verified ID and military-veteran reliability. I scope clearly, deliver on time, and stick around for support.
✅ 𝗥𝗲𝗰𝗲𝗻𝘁 𝗽𝗿𝗼𝗼𝗳
"Jari worked fast and reliably to fix a critical issue I had with my WordPress contact form. He knew exactly where to look and checked everything. Within less than 24 hours the form worked like a charm. Would definitely work with him again!" (Ronnie L.)
"Excellent service from Jari at Rengelmedia. He updated the portfolio on my website exactly according to my wishes. Communication was clear, he made sure we were on the same page, and he was transparent about the time needed and the final price. Very happy with the quality of the work. Highly recommended!" (Ricardo V.)
"Outstanding experience every single time. Consistently above and beyond my expectations, delivering high-quality work with great attention to detail. Communication is smooth, deadlines are always met (often even earlier), and the results truly speak for themselves. I highly recommend to anyone looking for reliable and top-tier service!" (Patrice E.)
✅ 𝗧𝗲𝗰𝗵 𝗜 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵
WordPress, WooCommerce, Elementor, custom themes and plugins, PHP, Laravel, React, Next.js, Vue, Node.js, Tailwind, MySQL/PostgreSQL, Git, Docker. Core Web Vitals, page-speed and on-page SEO baked in.
If you need a WordPress site that's fast, reliable and actually converts, or a developer to rescue one that isn't, send me a message with your goals and I'll tell you honestly how I'd approach it.
WordPress
WordPress Customization
WordPress Optimization
WordPress Bug Fix
WordPress Plugin
WordPress Development
WooCommerce
PHP
Elementor
WordPress Theme
Website Optimization
JavaScript
Website Migration
WordPress Website
Web Development
Page Speed Optimization
Laravel
React
Conversion Rate Optimization
WordPress e-Commerce
Elahe S.
Amsterdam, Netherlands
$17/hr
5.0
1 jobs
I am an Data Analyst with a background in Computer Engineering. I love digging into the "why" behind the numbers, using tools like Power BI, SQL, Python, and Azure to turn complex data into clear insights.
I’m a social person who thrives in fast-paced environments. I am a very fast learner—a great example is my Dutch language journey: I've followed an intensive program and reached the B2 level (NT2-II) in just 16 weeks!
Python
Microsoft Power BI
Test Results & Analysis
Data Analysis
Information Analysis
SQL Programming
Microsoft Azure
Tatev G.
The Hague, Netherlands
$40/hr
4.9
25 jobs
🚀 Full Stack Developer | WordPress, React & AI-Enhanced Web Solutions
I can help businesses transform ideas into fully functional digital products — from initial strategy, wireframing, and UI/UX design to full-stack development, optimization, and successful launch.
I’m a Full Stack Developer with 8+ years of experience building modern web applications, high-converting e-commerce platforms, and scalable digital solutions.
I specialize in frontend development, WordPress ecosystems, API integrations, and AI-enhanced workflows that help businesses improve user experience, automate processes, and grow faster.
I combine clean code, responsive UI/UX design, and modern AI-powered development tools to create fast, efficient, and conversion-focused websites and applications.
WordPress Development
JavaScript
React
WooCommerce
CSS 3
Bootstrap
PSD to HTML
Material UI
SEO Performance
Tailwind CSS
Webflow
GitLab
Figma
API Integration
Roy V.
Groningen, Netherlands
$65/hr
4.7
304 jobs
Hey, a real person will read your message, ask useful questions, and stay involved in the work - not just send you an AI-generated reply.
I’m a Full Stack Developer, SaaS Developer and Backend Developer focused on building production-ready software that holds up under real-world usage. My work sits at the intersection of software developer, web developer, and SaaS platform builder, with a strong backend-first mindset and deep attention to scalability, performance, and long-term maintainability.
As a Full Stack Developer, I take ownership of systems end-to-end, pairing robust backend architecture with clean, modern interfaces. My frontend work is typically React-based and I often collaborate with or replace traditional React developer or web developer setups by owning both frontend and backend in a single, coherent system. While I’ve previously worked as a WordPress developer and integrated WordPress-based sites into custom platforms, my current focus is on custom SaaS and API-driven systems rather than CMS-centric builds.
As a SaaS Developer, I help companies design, build and scale SaaS products, internal tools and API-driven web applications intended for long-term use. My experience as both a Backend Developer and software developer allows me to think beyond features and focus on architecture, reliability and operational stability from day one. Many of the platforms I build support internal teams, customer dashboards and multi-role workflows where permissions, data integrity and business rules are critical.
In my day-to-day work as a Backend Developer, I design and implement backend services, APIs and data models that power SaaS platforms, complex web applications and mobile-connected systems. I regularly work with Node.js and Python, drawing on my background as a Python developer to build scalable services, background jobs and asynchronous workflows that perform reliably in production.
As a Full Stack Developer, I ensure these backend systems integrate cleanly with frontend applications, mobile extensions and third-party APIs. When required, I support frontend and mobile app developer workflows using React and React Native. This end-to-end ownership is a key reason clients bring me in as a Full Stack Developer rather than splitting work across multiple roles.
A significant portion of my work as a SaaS Developer and Backend Developer involves building internal platforms, dashboards and API-first systems that integrate external services. In these projects, I often collaborate closely with product, growth, or analytics teams, including teams focused on SaaS marketing by designing clean data pipelines, event tracking and backend logic that supports experimentation, reporting and lifecycle insights.
When projects require AI-powered functionality, I bring hands-on experience integrating AI into backend systems. While my primary role remains Full Stack Developer and Backend Developer, I regularly implement AI-enabled workflows, data processing pipelines and LLM-driven features inside SaaS platforms. This allows me, as a SaaS Developer, to deliver AI functionality that is reliable, observable and cost-controlled rather than experimental.
Clients typically work with me when they need:
- a Full Stack Developer who can own frontend and backend
- a SaaS Developer who understands long-term scalability constraints
- a Backend Developer experienced with real production systems
- mobile app developer and React developer experience as a software developer
- backend services built with Node.js or Python by an experienced Python developer
- web applications with complex workflows and business rules from a senior web developer
- API-driven architectures and third-party integrations
- SaaS platforms designed to support growth, analytics and SaaS marketing data needs
- MVPs that can realistically evolve into long-term SaaS products
A large part of my work as a Full Stack Developer, SaaS Developer and Backend Developer focuses on:
- multi-role dashboards and internal tools
- authentication, authorization and permissions
- API-first backend system design
- integrations with external platforms, including legacy CMS or WordPress-based systems when required
My core work as a Backend Developer and Full Stack Developer covers:
- backend services built with Node.js and Python
- APIs, background jobs and integrations
- databases such as PostgreSQL
- modern stacks using tools like Supabase
- AI-enabled backend features where they add real business value
I regularly work on MVP builds and early-stage products as a SaaS Developer, with strong focus on solid backend foundations and sensible scaling paths. Based on scope and timing, I work hands-on as a Full Stack Developer, SaaS Developer and Backend Developer and when useful, involve specialists from my team.
Long-term results come from clarity and intentional system design. I focus on delivering software that teams can confidently run, maintain and scale.
WordPress
Full-Stack Development
React
Node.js
Python
JavaScript
Web Application
API
API Integration
Web Design
MySQL
HTML
Vue.js
PHP
Bootstrap
Software Architecture & Design
Software Development
Git
Laravel
Next.js
Paul B.
Haarlem, Netherlands
$130/hr
5.0
329 jobs
AI First Software Engineer | 300+ completed projects | 80% repeat clients | No Cure, No Pay | Experience with high-traffic platforms
I use AI to go super fast and have the technical skills to fix issues where it gets stuck.
I design and build reliable software: websites, applications, integrations, and AI-powered systems that improve operations, user experience, and conversion.
Interested? Send me a message, and let’s discuss your project.
What I Commonly Work On:
Custom software and functionality
Laravel application development
AI engineering and ChatGPT-powered solutions
AI-assisted development for faster delivery
Rapid prototyping and product iteration
AI agents, development loops, and automated workflows
Software factory design and implementation
API design and integrations
Business process automation
Full website and application builds
Plugins, modules, extensions, and themes
Legacy codebase cleanup and modernization
Performance, reliability, and scalability improvements
Server, application, and infrastructure maintenance
Troubleshooting and bug fixing
Technical consulting and solution architecture
Identifying practical ways AI can improve your business
Skills and Expertise:
AI engineering and generative AI
Large language model integrations
AI agents and workflow orchestration
AI-assisted software development
Software factories and automated development pipelines
Laravel
PHP, JavaScript, TypeScript, HTML, and CSS
API design and integration
Backend and full-stack development
Automation and systems integration
WordPress and WooCommerce
Subscription and marketplace platforms
Timber and Twig
Elementor, Divi, WP Job Manager, and content aggregation systems
High-traffic websites and scalable applications
WordPress
WordPress Plugin
WordPress Development
PHP
Web Development
JavaScript
API Development
Plugin Development
Elementor
WooCommerce
Website Customization
Theme Customization
Plugin Customization
Ecommerce Website Development
API
Luc D.
Dordrecht, Netherlands
$35/hr
5.0
9 jobs
I help growing and established businesses maintain, scale, and optimize WordPress platforms that need to be fast, reliable, and easy to manage long-term.
I specialize in WordPress development for companies that:
– Outgrow their initial setup
– Require ongoing maintenance and improvements
– Value performance, scalability, and technical stability
– Prefer fixed monthly retainers
My work is focused on clean architecture, maintainable code, and predictable delivery. I develop, extend, and optimize (existing) platforms so they keep supporting business growth instead of slowing it down.
What I typically handle:
– Custom WordPress & WooCommerce development
– Performance optimization and technical debt reduction
– Ongoing maintenance and feature development
– Platform stability, updates, and security
– Long-term technical ownership
Retainers & availability:
I work with a limited number of clients on monthly retainers. This includes dedicated hours, priority availability, and clear response times via SLA. Ideal for companies that want a reliable technical partner instead of a one-off freelancer.
This setup works especially well for:
– E-commerce businesses
– Service companies with ongoing development needs
– Agencies looking for a long-term technical partner
Typical engagement:
– Monthly retainer (8–40 hrs)
– Fixed monthly fee
– Clear scope & SLA
– Long-term collaboration
If you’re looking for a WordPress developer who thinks beyond individual tasks and focuses on long-term stability and scalability, we’re likely a good fit.
WordPress
WooCommerce
Elementor
Web Development
Adobe Photoshop
Adobe Illustrator
Responsive Design
Website Redesign
UX & UI
JavaScript
HTML5
CSS 3
PHP
jQuery
API
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