01
Your AI-built prototype is cracking
AI tools helped you move fast. Now the build is brittle, inconsistent and hard to trust.
What we doWe turn the rough version into something shippable.
Ship better products faster with expert use of LLMs and AI
Flat 18 turns rough product ideas into polished MVPs, dashboards and full-stack systems.
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.
For products that are close, but not ready
You're probably here because...
- 02
Your MVP works, but people do not trust it yet
The core idea is there, but the onboarding, interface or credibility still feels unfinished.
What we doWe sharpen the UX, flows and product foundations.
- 03
The launch window is open, but the product is not ready
A deadline, demo, investor conversation or market opportunity is close, and slow delivery will waste it.
What we doWe use senior judgement and AI carefully to accelerate the right work.
- 04
Your backlog is bigger than your team
Features, bugs and experiments are piling up faster than your team can sensibly handle.
What we doWe prioritise and ship the work that actually moves the product.
- 05
Your first version has traction and needs to grow up
Users, leads or internal demand are showing up. Now UX, performance, data, billing or integrations need to mature.
What we doWe move products from working prototype to business foundation.
- 06
You need senior judgement before more code
More output will not help if the direction is wrong. You need sharper questions, risk spotting and technical judgement.
What we doFlat 18 brings senior product, design and engineering judgement.
If this sounds familiar, send the product, prototype or idea. We'll tell you what to fix first.
Work that proves it
Real product builds, not pitch-deck theatre.
Social Publisher
Publishing operations frictionTurns scattered publishing checks into channel variants, validation, calendars, logs and retries.
Turned scattered social publishing work into a structured product teams can operate with less manual checking.
Read case study
SignalMap
Actionable analyticsTurns privacy-limited browser signals into aggregate reporting and practical recommendations.
Turned browser signals into a readable product that points teams towards the next useful fix.
Read case study
Ledger
Informal money trustTurns fragile shared money records into balances, receipts and proof people can explain.
Turned informal money tracking into clear records for loans, shared costs, project budgets and read-only review.
Read case study
Workouts
Training decision frictionReduces training choice overload with guided schedules, logging, recovery context and progress review.
Built a practical product flow from onboarding to progress signals, with enough structure to support repeated use.
Read case study
Felt Weather
Local context gapShows how conditions feel locally by combining forecasts with nearby public signals.
Combined forecast data with local context so people can understand how conditions feel nearby.
Read case study
Natal Charts
Dense calculation clarityMakes birth data, time-zone logic, transits and relationship comparison easier to read.
Turned specialist astrological calculation into a product journey people can read and share more easily.
Read case studyAI speed. Senior control.
LLMs accelerate the work. Experienced developers make the calls.
Senior direction
Architecture, trade-offs and implementation stay developer-led.
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.
Three ways to build
Choose the level of product help you need.
MVP Sprint
For focused first versions.
- Product scoping
- UX/UI direction
- Full-stack MVP build
- LLM-assisted implementation
- Deployment support
Product Build
For serious end-to-end launches.
- Product planning
- Interface design
- Frontend and backend development
- Authentication, database and integrations
- Testing and release support
Monthly Studio
For ongoing product work.
- Feature delivery
- UX improvements
- Technical support
- Refactoring
- Product experiments
Not sure which route fits?
Send the goal, deadline and main risk. We'll suggest the leanest responsible route.
A simple gated process
Fast work, reviewed before it ships.
01
Scope
We turn the idea into a buildable plan.
Goal, users, workflows and risks
02
Draft
LLMs help produce fast UI, code and documentation options.
Interface, code, content and docs
03
Build
Senior developers shape, test and connect the product.
Frontend, backend, data and integrations
04
Review
We check quality, security and release readiness.
Quality, security, release and handover
Fast output. Senior review.
LLMs are the acceleration layer. Senior developers are the quality control.
Pricing
Pricing for serious product work
Clear routes for MVPs, builds and retained product support.
Curated MVP Sprint
2-6 weeks
Starting at
£3,500
For focused first versions.
Best forMVPs, demos and early user testing
- Product scoping
- UX/UI design direction
- Full-stack MVP build
- Deployment support
- Handover notes
Complete Product Build
6-12+ weeks
Starting at
£12,000
For serious end-to-end launches.
Best forDashboards, web apps and product systems
- Product planning
- Interface design
- Frontend and backend development
- Auth, database and integrations
- Testing and deployment
Monthly Product Team
Monthly
Starting at
£2,995/month
For ongoing product work.
Best forLive products with a steady backlog
- Monthly development capacity
- Feature iteration
- UX improvements
- Technical maintenance
- Product experiments
Final pricing depends on scope, integrations and release requirements.
Not sure which route fits?
Share your goal and constraints. We will recommend the leanest responsible route.
Tell us what you want to build
Share the goal, deadline and current state. We will 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.