What we've built

Systems and AI integrations that run the back of a business, and websites that sell the front of it. All built from scratch.

Platform screens are mock-ups. Those clients are under NDA, so names and details are changed. Websites are public, so those are real screenshots.

Systems and AI → Website builds →

Mock-up of a generic platform map: customers, the app, admin screens, payments, an AI step with checks, email and a database — Mock-up of how a platform fits together. Click to enlarge.

Mock-ups · under NDA

Systems and AI integrations

Platforms, AI tools and data pipelines that do the work behind the scenes.

Mock-up of a property feasibility screen with a parcel map and a site score, made-up data

Latest

Property Development Feasibility Platform

A sample prompt from a real Cornerstone Devs build, client details removed. A land development business swapping spreadsheets and gut feel for a repeatable process that produces a client-ready report for each property.

Deterministic numbers
Versioned scoring engine

Next.js, Postgres RLS, Leaflet Read the prompt →

Mock-up of a contract review screen with flagged clauses and a risk score, made-up data

AI Contract Review Platform

Music industry. Flags risky clauses, lists obligations and refers to a lawyer.

Analysis in minutes
100+ hypothesis rubric

Next.js 14, SupabaseView case study →

Mock-up of a call desk with today's calls, call summaries and a daily health check, made-up data

AI Phone Receptionist

Tyre and auto workshops. Answers the phone, emails the shop and books the job.

Call summaries
Daily health check

Retell AI, n8nView case study →

Clinic Dashboard

Wellness clinic. A phone-first view of how the clinic is doing, plus a monthly brief.

Checked numbers
Monthly brief

Python, Next.js 16View case study →

Mock-up of a marketing dashboard with spend, return by channel and budget suggestions, made-up data

Marketing Analytics Platform

Marketing teams. Google Ads, Meta and Shopify in one dashboard, with budget suggestions.

Rule-based suggestions
Spending limits

Next.js 14, SupabaseView case study →

Mock-up of a data pipeline screen with broker records, checks and sources, made-up data

Customs Data Pipeline

Customs compliance. Public broker lists, cleaned and checked before they reach the CRM.

Anti-spam rules
Duplicate checks

Python, n8nView case study →

Mock-up of a subscription billing dashboard, made-up data

Payment Infrastructure Build

Subscription box startup. Failed payment recovery and a customer portal.

Recurring billing
Failed payment recovery

Stripe, Node.jsView case study →

Mock-up of a client portal with projects and files, made-up data

Consultant Client Portal

Strategy consultancy. Deliverables, invoicing and booking.

Client portal
Invoicing and booking

Next.js, Cal.comView case study →

Mock-up of a community feed with spaces and member tiers, made-up data

Community Platform Build

Education coach. Member tiers, content delivery and Stripe.

Member tiers
Paid subscriptions

Next.js, StripeView case study →

Mock-up of a member hub video library, made-up data

Wellness Retreat Member Hub

Retreat brand. Membership tiers, a video library and events.

Membership tiers
Video library

Next.js, MuxView case study →

Mock-up of a course platform with lessons and progress, made-up data

Course Platform Build

Wellness practitioner. Courses, video lessons and certificates.

Video lessons
Certificates

Next.js, VimeoView case study →

AI Workflow Command Center

Content and marketing agency. Saved AI workflows the team runs every day.

Saved AI workflows
Daily team use

Next.js, OpenAI API, Supabase, Vercel Cron

E-commerce Platform Build

Digital product creator. Shopify store with automatic delivery and license keys.

Shopify store
Automatic delivery

Shopify, Node.js, AWS S3, Stripe

More systems

FlowState Coach PortalClient intake, session notes and progress tracking for 1:1 coaches. Replaces spreadsheets and Notion workarounds.
SaaS Onboarding WorkflowsSignup, trial and upgrade flows with email and in-app triggers.
Smart Mac AssistantLocal AI automation for Mac. Files, calendar and scripts, with nothing sent to the cloud.
Boutique Wholesale B2B PortalOrder entry, minimum order quantities and invoices for wholesale accounts. Replaced manual PDFs.
Gym and Studio Booking StackClass scheduling, waitlists and membership check-in for fitness studios.
Lead Pipeline to CRM SyncForm submissions and discovery calls sent to HubSpot or GoHighLevel, tagged and shared out across the team.
Certification Exam PlatformTimed exams, question banks and certificates for professional certifications.
Recurring Invoice EngineRecurring Stripe invoices with payment links and failed payment follow-up for service retainers.

Real screenshots · live sites

Website builds

Brand sites and online stores, designed and coded by hand. Click through to see them live.

Screenshot of the cornerstonedevs.com homepage with the glowing system hub

Our own site

This website

We designed and coded cornerstonedevs.com ourselves. No template and no site builder. A live background, a scroll story on the homepage, and checkout built in.