Bart Gambart.

Bart Gambart — AI builder & iOS developer · Copenhagen

I build AI systems and iOS apps, and I ship them.

Sage is my flagship; alongside it, native iOS apps and client websites — real, deployed, in daily use.

Self-taught, I direct advanced AI engineering tools end-to-end to design, build and ship real software — from a personal AI system to iOS apps in TestFlight, live in a client's home, and websites paid for and shipped.

LanguagesEN · FR · NL · DE
MethodSelf-taught · Claude Code, Codex & ChatGPT
AvailableCopenhagen, Aug 2026
01

Sage — my personal AI system

The project I lead with, and the one I use every day.

Sage
Swift — native iPhone + Mac · Python multi-agent backend · Railway · PostgreSQL
● Live

Sage is my evolving personal AI system and working partner — not a chatbot. She began on Telegram; today she runs as native iPhone and Mac apps I built, on a Python multi-agent backend.

She runs like a CEO: I speak to Sage, and she routes each request to the right specialist — research, career, mail, operations — then brings the result back. Each agent has defined boundaries; Sage coordinates rather than doing everything in one prompt. I'm the product owner and final decision-maker.

Sage's native iPhone app: her avatar rendered as a luminous blue network portrait, with a voice interface and a status of Ready.
Sage on iPhone — voice & text

● In the native apps

  • Voice and text. Conversation works now; fluid interruption while she's speaking is still in development.
  • Career support today — a broader local-first counsellor is in development.
  • Limited inbox access today; fuller mail triage and drafting are still in development.
  • Memory that carries context across sessions.

◆ Search & research

  • Quick web search. A Tavily-powered pass fetches current information; Sage returns a short, cited answer in the conversation. If synthesis fails she hands back real source links rather than inventing one; if search is down, she says so.
  • Deep Research. A dedicated agent plans focused sub-queries, searches several paths in parallel, weighs conflicting sources and re-plans once if a pass is thin — then returns a cited synthesis. It runs as a queued background job (minutes); the report lands in the app's Jobs list, with no completion alert yet.

◇ Built for honesty

Sage keeps an evidence-backed capability registry — every capability logged with its real dependencies, limits and status. A structural honesty tripwire catches routing, implementation and those registered claims drifting apart, so unsupported behaviour fails visibly instead of being passed off as working. Architectural honesty about what the system can do — not a promise that every answer is right.

Still evolving. Security-reviewed and continually hardened, with explicit boundaries and fail-visible behaviour by design; some findings remain open, including a production-auth foundation the career work surfaced. The backend is deployed; the native apps are founder-operated builds, not public consumer apps.

Not a bot — a personal AI system I designed, deployed, security-reviewed and keep hardening.

02

iOS apps

Native apps, built independently — one in testing, one sold and running, one paused.

Chef Library
iOS · Swift
TestFlight

A native iOS app for chefs, designed and built independently. It's in TestFlight, with a version submitted and awaiting App Review — not yet released on the App Store.

I conceived, built and submitted it end-to-end.

Zero to a real, submitted iOS app, start to finish.

Executive OS
iOS · private client
Sold · Live

A private-chef booking and household tool. It's sold — installed and running in a client's home right now.

Built, delivered, and in daily use by a paying client.

Sold and in production is the strongest proof there is.

BuildMate
iOS · Swift · RoomPlan · LiDAR
Paused temporarily

An iOS room-scanning app: it captures a room with LiDAR through Apple's RoomPlan, then lets you correct the scan by hand before export.

Built the core capture flow on Apple's newest spatial APIs. Paused for now — resuming soon.

Real work with cutting-edge iOS spatial tooling.

03

Client websites

Real sites for real businesses — designed, built, deployed, and in one case paid for.

Alpine Clear
Web · bilingual EN/FR · Netlify
Sold · Live

A full multi-page bilingual site for a Verbier window-cleaning and property-care company — services, commercial, gallery, reviews, FAQ and contact.

Design through deploy: before/after slider, photo-upload quote form, Google reviews, WhatsApp click-to-chat, and SEO pages for Verbier and Val de Bagnes search. Live on a custom domain — and paid for.

Chef Yosh
Web · Netlify
● Live

A site for a Verbier private chef — a one-page home plus About, real sample menus, and a lightbox portfolio.

Built and deployed to a custom domain in a day, from his CV and real chalet-week menus.

04

How I work

I'm the founder and final decision-maker: I define what gets built, why it matters and the standard it's held to, I test the real product, and I keep final authority. I direct several AI systems as an engineering team — rejecting weak plans, questioning unsupported claims and iterating on evidence until the result genuinely works. I hold the work to the finished-product standards I admire in leading AI and consumer-technology teams: measurable reliability, independent review, real-device testing and evidence before release.

01

Claude Code usually leads the build

Claude Code inspects the actual repository, creates the initial technical plan, leads substantial implementation, and runs the tests, builds and checks that produce evidence. Some contained tasks it completes on its own.

02

Codex scrutinises

For complex or risky work, the plan and implementation go to Codex for independent review — missing requirements, weak assumptions, hidden failure cases — and are revised until they converge. Codex can also plan or complete suitable work itself.

03

ChatGPT to reason

Before code, I use ChatGPT to explore the problem, understand handoffs and turn an objective into a precise prompt — and to judge whether a result actually answers it. It isn't forced into every task.

It's not an assembly line. A small job might be done by one system alone; a foundational one gets several rounds of planning, independent review and real-device testing before I sign off. The amount of process scales with what's at stake. My part is the vision, the judgement, the standard, and the persistence to keep going until the evidence holds.

05

Background

Before software, I spent twenty-one years in Verbier as a painter and independent builder — including running my own renovation company.

I came up solving real problems for real clients, in four languages, in a town where you fix it yourself or it doesn't get fixed. That's the instinct I bring to software: see the whole system before you touch it, work to a standard a client will pay for, and finish.

I taught myself to build, and now I direct Claude Code, Codex and ChatGPT as an engineering team and ship real software — deployed, security-reviewed, running. I'm based in Copenhagen and looking for an opportunity to transition into AI full time.

BasedCopenhagen, Denmark
LanguagesEnglish · Français · Nederlands · Deutsch
BackgroundTrades · hospitality · own businesses (incl. BG Rénovation)
FoundationsCS minor · self-taught builder
Bart Gambart, portrait — a professional headshot in a navy jacket.
Bart Gambart — Copenhagen, Denmark

Contact

Hiring, or need something built? Let's talk.

I'm looking for AI developer roles in Copenhagen from August 2026, and I take on app and website commissions. If you want to hire or commission me, get in touch.