AI agents, built & shipped · on subscription

Your AI agents,
built for you.

A senior AI engineer on subscription. Starting from zero, or fixing what's already live — I design, build, and ship your agents and automations, one at a time.

$1,500 roadmap to start · ~2 weeks · credited in full if you continue

SHIPPEDsouthern sun · ref #001Agent builtshipped to productionTested & measuredbefore it went liveYou own itcode · docs · no lock-inNext one queuedone build at a timeLIVE ✓
10+
Years shipping production software
10M+
Users served by systems I've built
~2 wks
Start to your first shipped agent
100%
Code & IP you own
24h
Reply time. Always.
Who it's for

Two kinds of teams
hire me.

Starting from zero

You don't have AI yet

Competitors are already shipping agents
Ideas, but no in-house AI talent
No path from “we should” to “it's live”
Already live

Your AI is live but shaky

It hallucinates in front of customers
Costs are unclear and climbing
Stuck between a demo and something you trust

Either way, one senior engineer builds and ships it for you — one build at a time. You own everything. Pause or cancel anytime.

Why the alternatives stall

You've priced this out
already.

An AI agency$15–40k/mo retainers, junior devs on the keys, and a pitch deck before any code ships.
A freelancerA cheap rate and divided attention — you own the risk when it breaks in production.
A full-time hire3–6 months to find and ramp, $200k+ all-in, and no way to pause when the roadmap's quiet.
Building it in-houseYour engineers can ship a demo — hardening it (evals, cost, reliability) pulls them off the product.
Southern SunOne senior engineer who's shipped AI to 10M+ users. Flat monthly rate, pause anytime.
How it works

A roadmap first. Then the
machine runs.

01
Roadmap

I map what to build (or fix). Credited if you continue.

02
Subscribe

Flat monthly. Your backlog lives on a shared board.

03
Request → ship

One build at a time, shipped to production.

04
Pause / cancel

Pause a month anytime, or cancel. You keep everything.

Pricing

One subscription,
endless possibilities.

MONTHLY CLUB
Start today

Start with Southern Sun.

The subscriptionPause anytime
Lifetime discount · limited time
$5,500/month$9,000

Lock this rate for life.

Included
One build at a time
Unlimited backlog
Agents, RAG & automations
Shipped to production
Shared board
Direct line to me
Tested before ship
You own all the code
Start with a roadmap

Every subscription starts with the $1,500 roadmap · credited in full

The roadmap is your trial

$1,500, fixed. If it shows you don't need a subscription, you still walk away with a plan worth more than that.

No lock-in, ever

Pause between projects and billing pauses with you — you're not charged while paused. Cancel anytime; you keep all the code, docs, and IP.

What I build

Whatever moves the needle
with AI.

Customer-facing agents
Support, sales, concierge.
Internal copilots
Tools your team actually uses.
RAG & knowledge
Answers grounded in your data.
Workflow automation
The busywork, gone.
Reliability & cost fixes
For AI that's already live.
Integrations
Wired into the tools you run on.
Also from Southern Sun

AI reception for service businesses

A separate, productized service: an AI receptionist that answers every call — after hours, weekends, English and Spanish — books the job, and transfers the ones that need a human.

See Southern Sun Voice →
What you get

Everything you can
ask for.

Add anything on the list to your backlog — as much as you want. I work it one build at a time and ship each one to production.

Unlimited requests · one active build at a time
In scope
Agents & assistants
RAG & retrieval
Workflow automation
Reliability & cost cuts
Prompt & architecture reviews
Integrations & data plumbing
Visibility

See what's
shipping this week.

Your backlog lives on a shared board. Add requests anytime; watch them move from queue to live. No status meetings, no black box.

Backlog3
Agent
Customer support agent
Gqueued
RAG
Docs knowledge base
Gnext up
In progress1
Copilot
Slack sales copilot
Gshipping this week
Shipped2
Agent
Onboarding assistant
Glive
Automation
Invoice triage flow
Glive
The front door

Start with a
roadmap.

$1,500~2 weeks · fixed scopeCredited 100% to your subscription

New to AI? I map exactly what to build, and how.

Already live? I find what's broken and what it'll cost.

A prioritized, buildable roadmap
A straight answer on fit — before you commit
Book the roadmap
Work

Built.
Shipped. Real.

Production AI at scale, plus open-source tooling real teams use.

10M+ users · live
CellarTracker

10+ production AI systems for a platform with 10M+ users — including eval infrastructure with scoring, regression testing, and model comparison.

Start a conversation →
Shipped product
cuvée.club

Wine clubs matched by vibe with vector search, plus a multi-agent content pipeline (Writer, Editor, Scraper) generating content at scale.

Visit site →
Open source
biscotti

Prompt management and testing UI for AI agents — like Swagger UI, but for your agents. Non-technical teams iterate without touching code.

View on GitHub →
Gabriel Mongalo
About
I'm Gabriel — 10+ years shipping real software. I build the part most consultants skip: AI that's reliable, measured, and trusted in production.

Southern Sun is a solo practice — just me. No account managers, no junior handoffs. I design, build, and ship your agents one at a time, on a flat monthly rate.

Previously: CellarTracker · Uber · Carvana · Flashpoint
Multi-agent architectureRAG & retrievalVector searchEval infrastructureRegression & model testingPrompt toolingAzure AI FoundryPydanticAIFastAPIPythonTypeScript
FAQ

Questions,
answered.

I have no AI yet — is this for me?

Yes. Plenty of clients start from zero. The roadmap maps what to build first, and then I build and ship it — you don't need any in-house AI talent to begin.

What can I actually request?
How does “one build at a time” work?
How fast do things ship?
Can you fix or take over an AI system someone else built?
What if I run out of work?
Do I own everything you build?
Why start with a paid roadmap?
Who am I working with?
Start here

Get your roadmap.

A free 30-minute call to confirm fit, then we scope the $1,500 roadmap. No pitch, no deck.

G
Gabriel Mongalo
Intro call · 30 min · Free
30 minutes
No pitch. Just an honest conversation.
Remote · Google Meet

Booking runs on Cal.com. Their code loads when you click, not before.

or
Prefer async?
Tell me what's live and what's not. I reply within 24 hours.

Your name, email and message come straight to my inbox. I use them to reply and to talk about working together — no mailing list, never sold. How I handle your data.

Remote · Worldwide