Developio builds and scales web applications, SaaS platforms and APIs for companies across Europe — senior full-stack engineering across PHP, Node.js and modern JavaScript, delivered end-to-end from architecture through deployment.
End-to-end delivery — from architecture to deployment and ongoing maintenance.
Multi-tenant SaaS platforms and B2B web applications built with the right PHP framework for the job — Laravel, Symfony or a stack you already run — designed around SOLID principles and automated testing.
Modern, responsive interfaces with React, Next.js, Vue and TypeScript — or server-driven UIs with Livewire and Inertia.js.
REST APIs documented with Swagger/OpenAPI, payment integrations (PayPal, Mollie), OAuth2 logins and SMS gateways.
AWS deployment, Docker, CI/CD pipelines and hands-on Linux server administration — PHP, Nginx/Apache, mail and Redis.
Production features powered by the OpenAI API, plus an AI-assisted engineering workflow (Claude, GitHub Copilot) for faster, safer delivery.
Custom WordPress themes and plugins, WooCommerce stores and Shopify app development.
A pragmatic, production-tested toolbox — PHP-first, with full-stack range.
The engineering experience behind Developio — production systems delivered for clients across Serbia, Switzerland and Germany.
Subscription-based B2B SaaS with PayPal and Mollie billing, multi-tenant architecture and an Eloquent-optimized data layer.
API-driven tracking and reporting system for affiliate networks, documented with Swagger/OpenAPI and integrated with WordPress.
Advertorial marketplace connecting advertisers and publishers, with AI-assisted content generation built on the OpenAI API.
Custom plugins and WooCommerce extensions, plus performance tuning and modernization of legacy stores.
Developio is led by Vladimir Simić, a senior full-stack engineer based in Belgrade, Serbia. Over 12+ years he has shipped SaaS platforms, B2B applications and APIs for companies across Serbia, Switzerland and Germany — with full working-hours overlap across EU time zones.
PHP is home turf, backed by hands-on experience across React, Vue, Node.js, AWS and Linux infrastructure, and a disciplined, test-driven approach — OOP, SOLID principles, and unit/integration/functional testing.
Every Developio engagement also runs an AI-assisted workflow — plan, execute, review — using Claude and GitHub Copilot to move faster without cutting corners.
Tell us about your project — we usually reply within one business day.