About
About Jonas Stenild
E-commerce developer with 20+ years of PHP experience. Building production-ready plugins for merchants across every major platform. Currently at Matas A/S in Denmark.
Jonas Stenild
I started writing PHP and building for the web back in 2005. What began as curiosity quickly became a career - and over the past two decades, I have worked my way through nearly every layer of the e-commerce stack. From storefront templates to backend APIs, from database optimization to deployment pipelines, I have built it all.
My deepest experience lies in Magento, Shopware, Symfony, and WordPress. I have spent thousands of hours inside these codebases - building custom modules, debugging complex business logic, and architecting solutions that hold up at scale. I understand how these platforms think, and I know where they break.
Today, my primary focus is building plugins that solve real problems for merchants and developers. I do not build bloatware. Every plugin I ship is lean, well-tested, and designed to integrate cleanly with the platform it runs on. I believe plugins should make stores faster, not slower - and that the best code is the code you do not have to think about after you install it.
I publish plugins to the Shopware Store, WooCommerce marketplace, Shopify App Store, and Adobe Commerce Marketplace. Covering four major ecosystems means I can reach merchants wherever they are and bring proven patterns from one platform to another.
When I am not building plugins, I work as a developer at Matas A/S - Denmark's largest health and beauty retail chain - where I build and maintain e-commerce features at scale using Shopware 6, Magento 2, Symfony, and Vue.js. Working at that scale keeps my skills sharp and my perspective grounded in what actually matters: performance, reliability, and code that the next developer can understand.
Career Timeline
Tech Stack
Technologies I Work With
The tools and platforms I use daily to build production-ready e-commerce plugins and applications.
Certifications
Professional Certifications
Verified credentials from industry-recognized platforms - covering development, databases, APIs, and AI.
SQL (Advanced)
Advanced SQL skills including complex queries, joins, subqueries, window functions, and database optimization.
Verify credential HackerRankJavaScript (Intermediate)
Intermediate JavaScript proficiency including ES6+, async programming, closures, prototypes, and DOM manipulation.
Verify credential HackerRankREST API (Intermediate)
Intermediate REST API skills covering HTTP methods, authentication, pagination, rate limiting, and API design patterns.
Verify credential HackerRankPython (Basic)
Python fundamentals including data types, control flow, functions, OOP basics, and standard library usage.
Verify credential Google SkillshopGoogle Analytics Certification
Google Analytics 4 proficiency - property setup, data collection, reporting tools, and measuring the effectiveness of online marketing efforts.
Verify credential Anthropic AcademyClaude with Google Cloud's Vertex AI
Deploying and integrating Claude models through Google Cloud's Vertex AI platform for enterprise AI applications.
Verify credential Anthropic AcademyBuilding with the Claude API
Building applications with Anthropic's Claude API - covering prompting, tool use, streaming, and production integration patterns.
Verify credential Anthropic AcademyClaude Code in Action
Hands-on certification for Claude Code - Anthropic's AI-powered development tool for code generation, debugging, and software engineering workflows.
Verify credentialWant to work together?
Whether you need a custom e-commerce plugin, technical consulting, or a dedicated freelance developer - I'm available for remote projects worldwide.