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Services

What I can build for you

Three ways I help small businesses and startups — always with a fixed scope, a visible staging link, and no jargon.

Web application development

From a blank page to a working product: React front-ends on ASP.NET Core backends, deployed to Azure. You get something your customers can use — not a prototype that needs "one more phase".

  • Customer portals, dashboards, and internal tools
  • ASP.NET Core APIs and third-party integrations
  • Booking, quoting, and checkout flows
  • Azure hosting, CI/CD, and monitoring set up properly

AI, agents & copilots

AI that does a job, grounded in your own data. I build agents on Microsoft Foundry (formerly Azure AI Foundry) and Claude, wire them into your systems, and tell you honestly when AI is the wrong tool.

  • Microsoft Foundry agents grounded in your documents and data
  • Claude integrations — Agent SDK, custom skills, MCP servers
  • RAG search over company knowledge with Azure AI Search
  • Document processing and workflow automation

Care, rescue & modernisation

For products that already exist but hurt: slow pages, fragile deploys, a legacy .NET codebase nobody dares touch. I diagnose, fix, and leave things maintainable.

  • Migrating legacy .NET Framework apps to modern .NET on Azure
  • Performance audits and Core Web Vitals fixes
  • Bug-fix and small-feature retainers
  • Hosting and infrastructure cost cleanups

How we'll work together

  1. 01

    Intro call

    A free 30-minute conversation about your idea or problem. You leave with an honest read on whether it is worth building — even if the answer is "not yet".

  2. 02

    Fixed-scope proposal

    I write a plain-language walkthrough of the first version: what it does, what it costs, and when it ships. One price, no hourly meter running.

  3. 03

    Build in the open

    You get a staging link in week one and every week after. Progress is something you click, not a status report.

  4. 04

    Launch & support

    We ship the first version when it does its job well, then improve it based on what real users do. Support retainers available.

Tools I reach for

A proven core — .NET and Azure on the back, React on the front — chosen so your product is fast, easy to run, and cheap to host long after launch.

C# / .NETASP.NET CoreEntity Framework CoreReactTypeScriptSQL ServerAzureMicrosoft FoundryAzure OpenAIClaude Agent SDK & MCPDockerGitHub Actions

Common questions

How do you charge?

Scoped projects are fixed-price: you know the number before we start. Ongoing work and retainers are billed at a simple day rate. No surprises either way.

How long does a typical project take?

Most first versions ship in 3–8 weeks depending on scope. The proposal includes a real timeline, and the weekly staging link keeps it honest.

What technologies do you work with?

Primarily .NET and Azure — that's where I'm certified and where I spend my days (currently as a Microsoft vendor working on the backend of the Azure platform itself, and on the AI being integrated into it). But I'm not locked to one vendor: I've shipped production work in other stacks including Java, front-ends are React, and on the AI side I work with both Azure OpenAI and Anthropic's Claude, depending on the job.

Can you work with our existing team or codebase?

Yes. I regularly join existing projects for rescues, audits, or extra capacity — I adapt to your conventions rather than rewriting everything.

Have a project in mind?

Tell me what you're trying to build — you'll get an honest take on scope, timeline, and cost within two business days.

NZNick Zivkovic

I build reliable web applications and practical AI integrations on .NET, React, and Azure — Microsoft certified, currently a Microsoft vendor working on the Azure platform itself and the AI being built into it.

Microsoft Certified · Current Microsoft vendor — working on the Azure platform itself

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© 2026 Nick Zivkovic. All rights reserved.

Freelance .NET & AI Developer