Anthropic Claude · Europe · CET

Hire a Claude
developer.

I'm Ergini, a senior AI developer who ships production systems on the Anthropic Claude API - integrations, agents, MCP, tool use, and RAG. Working across Europe on CET, direct contract, no agency layer.

Book a 30-min Claude scoping callergin@ergini.com

What I build with Claude

Claude API integration

Streaming chat, tool-calling, structured outputs, and prompt caching wired into your product, behind a clean interface.

Claude agents and MCP

Agents built on Claude's tool-use fidelity, plus typed MCP servers that expose your systems to Claude cleanly.

RAG on Claude

Retrieval over your documents with Claude as the generation model - hybrid search, reranking, citation grounding, eval.

Migration to Claude

Move an existing OpenAI app to Claude, or to a routed multi-model setup with automatic fallback via the AI Gateway.

Cost and prompt audits

Audit your current Claude usage for cost, latency, and prompt quality, with prompt caching to cut spend.

Compliant Claude builds

Claude integrations that respect EU data residency and the AI Act, for teams that need both capability and compliance.

Stack

Anthropic Claude APIClaude Opus 4.7Claude Sonnet 4.6Claude Haiku 4.5Model Context ProtocolVercel AI SDKVercel AI GatewayOpenAI APINext.jsTypeScriptNode.jsPythonpgvectorQdrantSupabaseVercel

How engagements work

  1. 01

    Discovery call (free, 30 min). You describe the outcome, I ask hard questions, we both leave with a clear picture of what's needed.

  2. 02

    Written scope and quote (3 days). Fixed-scope where possible, milestones, deliverables, and a price you can sign.

  3. 03

    Build (2-10 weeks). Weekly demos. You see the system running every Friday, not at the end.

  4. 04

    Ship and handoff. Deployment, monitoring, docs. Optional retainer for ongoing changes at $100/hr.

Frequently asked questions

What does a Claude developer actually do?

Builds production software on the Anthropic Claude API: streaming chat, tool use and function execution, structured outputs, the Model Context Protocol, RAG over your data, and Claude-driven agents - with the evals, guardrails, and cost control that keep it reliable. Not prompt copywriting. Shipped systems.

Why pick Claude over GPT for my product?

Claude leads on coding, long context, tool-use fidelity, and computer use, which makes it the strong default for agents and developer-facing features. GPT leads on multimodal, voice, and the lowest price tier. I integrate both without vendor bias and route per task. See my Claude vs ChatGPT for developers breakdown.

Can you integrate Claude into our existing stack?

Yes. I meet your stack where it is - Next.js, Node, Python - and add a clean Claude layer behind an interface, so you can iterate the model without touching the rest of the app. Most clients keep their existing backend and database.

Do you build MCP servers and Claude agents?

Yes. MCP is one of the better things to happen to LLM tooling, and Claude has first-class support for it. I build typed MCP servers that expose your systems cleanly, and agents that use Claude's tool-use reliability with human-in-the-loop checkpoints on the actions that matter.

Where are you based and what hours do you work?

Pristina, Kosovo, on CET (UTC+1) - full overlap with the European working day and good overlap with North America. Remote-native, English-fluent, direct contract with no agency layer. EU clients get reverse-charge VAT handling.

How much does it cost to hire you for Claude work?

Fixed-scope Claude integrations typically range $3.5K-$45K, larger agent or AI MVP builds $12K-$60K. Hourly is $100/hr after launch. Every quote is set around your actual scope after a free 30-minute discovery call.

Related: Claude AI in Kosovo, Claude vs ChatGPT for developers, or my AI agent development service.