Senior .NET Developer
& Software Architect
I design, build, and modernize backend systems in C# and ASP.NET Core — pragmatic architecture, clean code, and systems that stay available when it matters.
Services
Whether it’s a single component, the architecture of your whole platform, or the website that represents your business — here’s how I can help.
Backend Development in C# / ASP.NET Core
I build robust, testable backend services and APIs with ASP.NET Core — from greenfield projects to extending existing systems. You get maintainable code your team can build on, not a black box only I understand.
Software Architecture
Architecture should serve the product, not the diagram. I design pragmatic, clean, and scalable application architectures — typically domain-driven designs with rich domain models and an onion architecture, so your business logic stays independent of frameworks and infrastructure. Right-sized for your team and your growth, with clear boundaries that keep change cheap.
System Architecture & High Availability
Individual components are only half the story. I design how services, data stores, and infrastructure fit together into systems that scale and stay up — component design, integration, and the “glue” that makes distributed systems reliable.
Legacy Modernization & Refactoring
Old codebases slow teams down and make every estimate a gamble. I refactor and migrate legacy .NET solutions step by step — without a risky big-bang rewrite — so your team ships faster and regressions become rare instead of routine.
WordPress Websites & Custom Plugins
Beyond backend systems, I build WordPress sites that go further than off-the-shelf themes allow — including custom plugin development when your requirements don’t fit an existing solution. You get a site that’s tailored to your business and engineered with the same care as my backend work, not a fragile stack of third-party plugins.
AI-Assisted & Agentic Development
I actively work with agentic coding tools and integrate them into professional workflows — with the engineering judgment to know where they accelerate a team and where they create risk. I can help your team adopt these tools productively and safely.
Not sure exactly what you need? That’s what a first conversation is for. Get in touch and we’ll figure out together where I can help.
About Me
I’m Phillip Djurdjevic, a senior software developer and architect from Vienna, Austria, with many years of experience building backend systems in the .NET ecosystem.
Most of my work sits where it matters most to a business: the systems behind the product. I’ve designed architectures for high-availability platforms, untangled legacy codebases that nobody wanted to touch, and built services that are still running — and still maintainable — years later. Alongside that, I increasingly help businesses with their web presence — WordPress sites and custom plugins, built with the same engineering standards.
My background in control systems engineering — including several years of embedded software development — shapes how I work: I think in feedback loops, failure modes, and the behavior of the whole system, not just individual components. When you’ve written software for hardware that can’t just be restarted, you design cloud systems differently, too. That’s why clients bring me in when reliability and scalability aren’t optional.
I’m equally comfortable in a technical deep-dive and in a meeting room. I translate between management goals and engineering reality, so decisions get made with a clear view of cost, risk, and value — no jargon walls in either direction.
Currently, I’m putting significant time into agentic, AI-assisted development — because the teams that learn to use these tools well will outbuild the ones that don’t.
Contact
Maybe you need an extra senior pair of hands, an architecture review, a plan to get your legacy system under control — or a new website. The first conversation is without obligation, and usually enough to know whether we’re a fit.
Based in: Vienna, Austria – working remotely across the DACH region and beyond