Fixed-scope engagement with clear deliverable and deadline
Scoped Build · 4–8 Weeks
Custom Web & Mobile App Development
Full-stack web applications and native iOS / Android mobile apps — scoped, shipped, and supported. Proven App Store and Google Play deployments, including a B2B partner portal in production for 7+ years.
4–8 weeks $12k–$40k
Limited slots · First-cohort pricing · Your competitors are already automating
Most "development" agencies have never actually shipped to the App Store. Apple rejects 40%+ of first submissions — and that's before you discover your backend can't handle the load. 9o4t Inc has shipped a multi-platform B2B partner portal to web, iOS App Store, AND Google Play, used in production for seven years by real B2B customers.
Our specialty is B2B internal tools, partner portals, field-facing mobile apps, and custom integrations — the software that runs a business, not consumer mobile games. We bring a Director's scoping discipline: no "this'll take 2 weeks" that turns into 6 months.
Standard engagements are 4 to 8 weeks, flat fee $12k–$40k. You get a shipping product, your source code, and a handoff package your future developer can actually work with. Build slots are limited and they fill — the teams that ship the portal or app this quarter are the ones quoting it to customers while everyone else is still writing a spec.
Deliverables
What You Get
- Full-stack web app (Next.js, React, TypeScript, Postgres)
- Native iOS and Android apps (React Native or native Swift/Kotlin)
- App Store and Google Play submission handling (incl. rejection recovery)
- Hosting setup on Vercel, Railway, or your existing infrastructure
- Authentication (Clerk, Auth0, or custom)
- Source code + documentation delivered to your repo
- 30 days of post-launch bug fixes and minor polish
Why 9o4t
Proven App Store Shippers
We've passed Apple and Google review and kept a B2B partner platform in production for 7+ years. Most shops claim mobile experience; we have receipts — real users, real reviews, real store listings.
Director-Level Scoping
Scoping is the #1 failure mode in custom development. Our founder led three engineering teams at a $150M company — project scoping was his day job. You won't get optimistic timelines; you'll get realistic ones with risk flags.
Business Fluent, Technically Deep
Dual MBA + MS Information Systems means we can absorb your business requirements without hand-holding. No week-long discovery engagements to understand what a 'partner hierarchy' is — we've already lived it.
Integrates with Your Existing Stack
Most custom apps are islands. Ours plug into NetSuite, Salesforce, HubSpot, Stripe, Slack, and your warehouse on day one. That's what 15+ years of enterprise CRM and ERP work buys you.
Fit Check
Ideal For
- B2B companies needing a custom partner portal or internal tool
- Field-service operations needing a mobile app for technicians or drivers
- Telecom agencies, MSPs, and master agents needing branded customer-facing apps
- Founders with a validated idea and 4–8 weeks to a shipped MVP
- Companies with existing NetSuite or Salesforce that need a custom UI layer
- Operators burned by offshore agencies that ghosted mid-project
FAQ
What tech stack do you default to?
Web: Next.js + React + TypeScript + Postgres, deployed on Vercel or Railway. Mobile: React Native for cross-platform, Swift or Kotlin for native when performance demands it. Auth: Clerk or Auth0. We'll use your existing stack if you have one; we won't force ours on you.
Do you do iOS, Android, or both?
Both. We've shipped to both App Store (Apple) and Google Play (Android) simultaneously for B2B partner apps. Most B2B mobile apps benefit from the same codebase via React Native; for performance-critical work we'll go native.
How do you handle App Store rejections?
First-submission rejections are ~40% industry-wide — we plan for them. Our submission checklist front-loads the common rejection triggers (in-app purchases handling, privacy disclosures, demo accounts, login flow). When a rejection happens we turn it around within 2–3 business days.
Who owns the code?
You do. Source lives in your GitHub or GitLab from day one. We write access is shared; we commit directly into your repo. No 'our proprietary framework' lock-in, no code delivered as a zip file at the end.
What about ongoing maintenance?
Included: 30 days post-launch. Optional retainer: $500–$2,500/month for bug fixes, App Store/Play update compliance, and minor feature work. Larger ongoing builds move to fractional CTO retainer for better economics.
Can you build on top of an existing NetSuite or Salesforce instance?
Absolutely — this is one of our strongest patterns. Custom UI layer (web or mobile) backed by NetSuite SuiteScript, Salesforce Apex, or direct REST APIs. Gets you the UX of a custom app with the data integrity of your system of record.
Don't Wait
Every Week You Wait Is Money Left on the Table.
Your competitors are already automating. David Cullum scaled a telecom brokerage from $50M to $150M — and he still ships code. Lock in first-cohort pricing on the $999 AI Assessment before the slots are gone.
Limited slots
Skip the line.
Tell David what's eating your week. You'll hear back within one business day — usually faster.