AI systems architecture · engineering · R&D
We design and build AI-native systems. In the open.
4C Digital is a technical R&D lab and on-demand engineering practice. We architect and build AI systems from first principles — open-source stack, sovereign infrastructure, and specs your team can own forever.
Architecture First
AI systems that survive contact with reality are designed from first principles — decomposed, interrogated, specified — before anyone writes a function.
Open by Default
We build in public and open-source our tools. Transparent methods, shared primitives, readable systems — the best architecture is the kind you can hand to your team and walk away from.
Operational Sovereignty
Your stack, your data, your inference. We design toward ownership at every layer, from model weights to deployment to your right to walk away from any vendor.
How we think
Architecture first. Open by default. Sovereignty always.
Every system starts with a hard look at requirements, dependencies, and data before anyone writes a line. We document what we build, open-source what we can, and ship to infrastructure you control. The method isn't a slide — it's how our own operation runs.
What we do
Architecture, engineering, and on-demand technical capacity.
Architecture & Design
Architecture engagementAI systems design from first principles
We design agent protocols, data flows, inference topology, and integration architecture before any code gets written. The output is a working spec — decisions recorded, dependencies explicit, tradeoffs argued — not a slide deck.
Engineering
Engineering retainer or projectWe build what we design
Full-stack AI engineering: agent crews, RAG pipelines, sovereign inference infrastructure, open-source integrations. Shipped to infrastructure you control, in repos your own engineers can read and extend.
On-Demand AI Architects
Sprint or monthly blockPrincipal-level technical capacity when you need it
Embedded, async-first technical capacity — architecture reviews, PR reviews, hard-problem pairing, technical diligence on vendors and models. Not hourly contracting; senior judgment, on call.
4C Shade — the agent-native delivery platform for software you can prove.
Our flagship platform: AI agents build the software inside a human-governed, fully auditable workflow. We're proving it now on GableLBM, ahead of general availability.
We eat our own cooking
We run on the same stack we design for clients — a human-gated agent crew, a sovereign inference layer with no per-token vendor billing, and tooling we built and open-sourced. The architecture decisions we recommend are ones we live with.
From the systems architect behind FutureBuild's open source ecosystem, Velocity by BuilderWire, and GableLBM.
Build something you own.
Whether you need a systems design, an engineering team, or a senior architect on call — let's figure out what fits.