Senior direction
Architecture, trade-offs and implementation stay developer-led.
Turn fast-built prototypes into products you can trust.
We bring product thinking, design and senior engineering to rough or AI-built prototypes — making them ready to launch, learn from and improve.
Senior controlArchitecture, security and release stay in expert hands.
Weeks, not monthsLLMs speed up drafts, tests, docs and build decisions.
Code you ownRepository, roadmap and technical decisions included.
When Flat 18 fits
When a prototype needs a product.
- 01
Prototype needs to become a product
We make brittle first builds clear, stable and ready to ship.
- 02
Launch, backlog or product direction needs momentum
We focus the work and make the calls that get a credible release out.
- 03
You need a technical co-founder
We bring senior product and engineering judgement from first decision to release.
Send the product link, prototype or idea. We’ll tell you what to fix first.
Tiny audit
A focused review for founders with a rough or AI-built product. Get three practical fixes and a clear next step.
Get a tiny auditWork proof
Work that proves it
Real products, thoughtfully built.
Social Publisher
- Focus
- Turns scattered publishing checks into channel variants, validation, calendars, logs and retries.
- Evidence
- Channel variants · Validation, logs and retries
- Outcome
- Turned scattered social publishing work into a structured product teams can operate with less manual checking.
SignalMap
- Focus
- Turns privacy-limited browser signals into aggregate reporting and practical recommendations.
- Evidence
- Cookie-free tracking · Rule-based recommendations
- Outcome
- Turned browser signals into a readable product that points teams towards the next useful fix.
Ledger
- Focus
- Turns fragile shared money records into balances, receipts and proof people can explain.
- Evidence
- Receipt-backed records · Read-only sharing
- Outcome
- Turned informal money tracking into clear records for loans, shared costs, project budgets and read-only review.
AI speed. Senior control.
LLMs accelerate the work. Experienced developers make the calls.
Fast iteration
LLMs help explore UI, code, content and tests quickly.
Curated output
We refine, test and integrate. We do not ship raw AI output.
Production awareness
Data, permissions, deployment and maintainability are considered from the start.
Process
Build with confidence
Flat 18 / delivery mapLive sequence
Scope
We turn the idea into a buildable plan.
Goal · users · workflows · risks
Fast output. Senior review.
Nothing reaches release as raw AI output.
Pricing
Pricing for serious product work
Clear routes for MVPs, builds and retained product support.
See what each route includesPer project
Curated MVP Sprint
For focused first versions with a clear route from scope to handover.
Starting atUSD—
Discuss a projectWebsites
~ 1-3 weeks
API feature expansion
~ 1-3 weeks
Scoped integration or expansion
~ 2-4 weeks
Monthly
Monthly product delivery
For every kind of project that needs ongoing momentum: websites, features, APIs, integrations and product improvements.
- Feature delivery and iteration
- Websites, APIs and integrations
- Ongoing product and technical support
Starting at
Discuss monthly workUSD—/month
Pause or resume any month.
Discount is available for retainer commitments.
Fixed-scope review
Tiny Audit
For a rough MVP, early product or AI-built prototype that needs a clearer next move.
USD—Fixed fee · 3 working days
See what’s includedReady to get started?
Order straight away
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Tell us what you want to build
Share the goal, deadline and current state. We’ll reply with the best route and next step.
Ready to ship something better?
Flat 18 can help you shape, build and ship it faster with senior developers directing the LLM-assisted process.