AI Solution Architect · Sydney

Fransiscus Setiawan

Azure · .NET · Agents & RAG · Enterprise integration

I build AI systems for Australian enterprises — agents, MCP, RAG on Azure and .NET. Multi-tenant, ACL-filtered, audited, and still standing after go-live. I write down what broke and what I changed.

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rag-pipeline.cs — ~/work

var hits = await retriever.SearchAsync(query, new RetrieveOptions { TopK = 8, Hybrid = true, Acl = AclFilter.For(principal) }); // Refuse before the model gets a chance to invent // a policy clause it can’t cite. var grounded = hits.AboveScore(_minGroundingScore); if (grounded.Count == 0) { _metrics.RetrievalMiss(query.TenantId); return Answer.Refuse(“no grounded evidence”); }

What I work on

Agents & MCP

Tool calling, multi-tenant MCP gateways, auth boundaries, and eval loops for when the model gets real side effects.

RAG & enterprise AI

Chunking, hybrid retrieval, citations, ACLs, Azure OpenAI / AI Search — the parts that break after the golden-set demo.

.NET, Azure, EV charging

C# services, event-driven integration, OCPP platforms, and the ops detail behind “it works in prod.”

From the blog

Recent writing

All articles

Practical notes with code, tables, and trade-offs — written for engineers and the people who own the delivery risk.

Code
Tables
Trade-offs
Production notes

Shipping Price Decisions on Azure ML: Jobs, Storage Handoffs, and Gaps I’d Fix FirstSeptember 14, 2026
Parts 1–3 built the commercial loop: demand curve, 5¢ grid, dual change gate. This post is the shipping layer — how those jobs actually run on Azure without…
Model-Agnostic AI Architecture: Swap LLMs SafelySeptember 13, 2026
Model-agnostic AI architecture means the model is a replaceable part. Keep contracts, tools/MCP boundaries, retrieval with ACL, an eval harness, and observability stable. Swap the model, prompt pack,…
Transform Once, Deliver Many: transformation, apidelivery, and webhookdeliverySeptember 10, 2026
Partners still drop CSVs. Downstream still wants JSON records, paged REST, or a webhook that never skips a batch. I do not hide that work in one mega…
Scoring a Shelf-Price Grid: Margin, Shortfall, and Competitive AnchorsSeptember 7, 2026
Part 1 said I do not predict a sticker. Part 2 built the demand curve. This post is the commercial layer: how I turn that curve into a…
Building EV Integration with Greenflux CPMSSeptember 5, 2026
I built a .NET SDK for EV integration with Greenflux CPMS. A typical charging-app session on Charge Assist is: register an app token, attach a payment method, start,…

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If you’re stuck on an AI or integration design review

I can talk through architecture, security boundaries, and delivery constraints. Based in Sydney.

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