Sacha Hennaut Pomdapis

`◆ who`

constsacha={role: "fractional CTO + hands-on builder",timezone: "GMT+1 · works fully remote",focus: ["multi-tenant platforms","event sourcing","AI agents"],stack: [".NET 10","TypeScript","Next.js","Kubernetes","PostgreSQL"],shipping: ["Sassy Solutions","Nexus","Compendium"],loves: ["clean ports & adapters","boring tech under wild ideas","shipping"],};

I split my time between building my own platform (Sassy Solutions / Nexus / Compendium) and plugging into client teams as their CTO — usually 1 to 3 days a week, fully remote. I pick up architecture, hire technical talent, unblock delivery, and ship code alongside the team. No theatre, no slide decks, just a senior engineer with skin in the game.

`◆ what i'm building`

Sassy Solutions

An agent-building agency. We design, build, and ship custom AI agents on a multi-tenant platform we own end-to-end.

— Hexagonal .NET core — RAG + tool-calling out of the box — White-label deploys — Marketplace of skills & templates

agents-as-a-service

Nexus

The multi-tenant platform behind Sassy Solutions. Event-sourced, schema-isolated, Kubernetes-native.

— Per-tenant Zitadel + Postgres schema — Auto-provision in seconds (org → identity → DB → namespace → ingress) — Ships with SDK + MCP server + admin UI — Deploy-from-template pipeline

.NET 10 · CQRS/ES · K8s · private

Compendium

The event-sourcing framework underneath Nexus. Open primitives for aggregates, projections, multi-tenancy, and outboxes.

— Zero-dependency core — Multi-tenancy as a first-class concern — Result pattern, no exceptions for control flow — Published as NuGet

`◆ open ecosystem`

Compendium isn't a monolith — it ships as a tiny core + a growing constellation of adapters, so you only depend on what you actually wire in. Everything below is MIT-licensed, .NET 10, and built to the same conventions (adapter template).

🧠 AI providers

_{Chat, embeddings, tool-calling, streaming. Swap providers without touching domain code.}

🔎 Vector & search

_{Postgres-native or cloud — same IVectorStore port. RAG without ceremony.}

🗄️ Infrastructure

_{JSONB event store · idempotency + projection checkpoints · S3-compatible object storage.}

💸 SaaS plumbing

_{Billing · identity · transactional email — the boring-but-load-bearing stuff, wired up once.}

⚡ Also brewing →stream-ui · form-first LLM streaming for React & React Native

sassy-solutions/stream-ui — Type-safe streaming + parsing of structured LLM output, AG-UI + A2UI native, zero runtime deps. Built for the agent UIs we ship at Sassy.

`◆ work with me`

I'm a good fit if you're a founder, CTO, or scale-up team who needs one of these:


🧭	Architecture you can grow into — multi-tenant from day one, without over-engineering.
⚙️	A platform spine — event sourcing, CQRS, auth, provisioning, observability, wired right.
🤖	Agents that actually ship — not demos. Owned data, owned infra, owned roadmap.
🚀	Delivery acceleration — pair with your team, unblock, ship, hand back cleaner than I found it.

`◆ stack`

backend

frontend

platform & ai

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