Senior-level experience
Years of building and maintaining production software, working in complex codebases and systems that people depend on daily.
About
Bas Mulder
Dutch software engineer with many years of experience building web applications, SaaS platforms, APIs, integrations and business-critical systems.
My background is backend-heavy: PHP, Laravel and Symfony, domain-driven architecture, relational data modelling, queues, caching and APIs that other teams depend on. Around that I work full-stack — React, Next.js, Vue and TypeScript on the front, Docker, CI/CD and cloud infrastructure underneath.
In recent years my focus has shifted towards AI-powered applications and enterprise AI architecture: agents with tool calling, Retrieval-Augmented Generation over company knowledge, MCP servers exposing business systems, and Microsoft AI Foundry and Azure OpenAI running inside existing application landscapes.
I work as Bas Mulder, operating under basmdev.nl, on selected freelance assignments where architecture and long-term maintainability matter as much as shipping the first version.
Positioning
Why work with me
What you get when you hand over a difficult system instead of a small task.
Backend depth
Deep expertise in PHP, Laravel and Symfony — architecture, data modelling, queues, APIs and performance.
Full-stack capability
Backend, frontend, APIs, infrastructure and deployment. No handover gaps between the parts of a system.
AI engineering
Hands-on integration of AI agents, RAG, MCP and Microsoft AI Foundry into real applications, not proofs of concept.
Business-oriented engineering
Technology choices are made to solve a business problem. Complexity has to earn its place.
Ownership
Comfortable owning a project end to end: talking to stakeholders, making decisions and delivering production-ready software.
Let's build something
Tell me about the system you need built, rescued or extended.