Senior direction
Architecture, trade-offs and implementation stay developer-led.
Build better products faster with expert use of LLMs and AI.
Flat 18 is a digital product agency. We design and build software for teams dealing with dense workflows, technical systems and products that have to work.
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
Top reasons teams call us.
- 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.
Projects we've worked on
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.
View project
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.
View project
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.
View projectAI 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.
Technology we use
The technology behind the speed.
A focused modern stack for building products end to end. The tools change with the work; the judgement behind their use does not.
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Product design and web development
Choose the level of product help you need, from a focused MVP to an ongoing delivery partner.
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.
Pricing
Flexible for every kind of project
Choose monthly delivery for ongoing work, or a fixed project package for a smaller, clearly scoped task.
Per project
Short, scoped work
Useful for adding a feature, extending an existing product or getting a website shipped.
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.
Ready to get started?
Order straight away
Choose a route, enter your details and we’ll prepare a secure Invoice Ninja payment link.
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.