Storewell Parking Booking Dashboard
WordPress admin React SPA with custom REST API. Booking dashboard, calendar, role-aware screens. South African client.
Remote delivery across South Africa
Single page app developer in South Africa for
React, Next.js and embedded business tools.
Remote delivery across South Africa, Cape Town based. Focused React and Next.js single page apps for South African business workflows. Browser-only tools that keep tool data in the user browser. API-connected SPAs for live data. Embedded SPAs for WordPress, WooCommerce, Shopify, and CRMs the business already runs on.
2017
Shipping single page apps since
8
Public browser tools live
ZA
POPIA-friendly browser-only tools
SA
Remote delivery, ZAR pricing
Three Shapes
Three kinds of single page apps
Browser-only SPAs (POPIA-friendly by default)
Calculators, estimators, document generators, public lead-magnet apps, internal staff tools. IndexedDB or localStorage for state. JSON export for backup. PDF or print for output. No backend, no upload, no account. Right when the data is short, private, and personal to the user.
API-connected SPAs
React or Next.js front ends that read and write through external APIs. WordPress REST, WooCommerce Store API, Shopify Storefront, CRM and ERP APIs, REST or GraphQL on Node or PHP. Right when the workflow needs live data or write-back to a system of record.
Platform-embedded SPAs
WordPress shortcode apps. WooCommerce product selectors. Shopify configurators. CRM admin screens. Internal dashboards. The SPA renders inside the platform the business already runs on. Right when the missing piece is one focused screen, not a new platform.
Built for South African workflows
ZAR pricing, VAT, UIF and BCEA fields where useful. South African payment gateway mix on comparison tools. WhatsApp and tel handoffs on lead-magnet tools. The eight public tools at /tools show the pattern in production.
South African Tools
Built for South African business workflows
Free Billing App
Browser-only invoices, quotes, credit notes in ZAR with VAT. IndexedDB storage, JSON backup, PDF print. No signup. Used by micro to large businesses.
Try the Billing App›Free Payslip Generator
Payslip generator for micro businesses and informal-segment employers. BCEA fields, UIF, gross-to-net. IndexedDB, JSON backup, PDF output. Browser-only.
Try the Payslip Generator›Free Profit Margin Calculator
Margin, markup, and pricing analyzer with VAT, sales tax, landed cost, and scenarios. Built as a browser-only single page app.
Calculate Margins›Free Project Estimator
PERT estimating, risk register, milestones, printable estimates. Spreadsheet logic in a browser-only SPA.
Estimate a Project›Payment Gateway Fee Comparator
Compare South African payment gateway fees side by side. Decision-support SPA, computed in the browser.
Compare Gateways›Email Signature & Template Generator
Drag-and-drop visual editor for email signatures and templates. Email-safe HTML compiler, IndexedDB storage. Browser-only.
Build a Signature›Projects
Public tools you can open now
Next.js | IndexedDB | localStorageFree South African Billing App
Browser-only invoices, quotes, credit notes in ZAR with VAT. IndexedDB, JSON backup, PDF print.
Open the Billing App›
Next.js | IndexedDB | UIF computeFree South African Payslip Generator
BCEA Section 33 payslips, UIF calculation, JSON backup, PDF output. For micro businesses and informal-segment employers.
Open the Payslip Generator›Next.js | localStorage | scenario compute
Free Profit Margin Calculator
Margin, markup, pricing analyzer with VAT, landed cost, scenario compare. Browser-only.
Open the Calculator›
Next.js | PERT compute | A4 PDFFree Project Estimator
PERT, risk register, milestones, printable A4 estimates. Spreadsheet logic in a browser-only SPA.
Open the Project Estimator›
Next.js | @dnd-kit | custom compilerEmail Signature & Template Generator
Drag-and-drop visual editor with a custom block-tree-to-email-safe-HTML compiler. IndexedDB storage.
Open the Signature Designer›Next.js | computed comparison
Payment Gateway Fee Comparator
Compare South African payment gateway fees side by side. Computed in the browser from published inputs.
Open the Comparator›
Next.js | amortisation computeCompound Interest Calculator
Loan repayment, service fees, amortisation table, interactive graph. Stateless browser-only SPA.
Open the Calculator›Next.js | QR generation
PayPal.Me Link Generator
PayPal.Me link from handle, optional amount and currency. QR code, share by WhatsApp or email.
Open the Generator›Client SPAs
Client single page apps already shipped (API-connected and embedded)
Eight client SPAs in production across WordPress, WooCommerce, Shopify and custom APIs. Real systems, real data, real users.
Optivest Price Calculator SPA
WordPress React single page app with secured API data feeding a price calculator inside the existing site.
Optivest MedXpert SPA
Medical aid plan selection inside WordPress. Embedded React SPA, REST API, multi-step decision flow.
ICA Custom Course/Product Selector
Public and admin React SPAs inside WordPress with custom MySQL and REST API. Course and product selection journey.
Truly Essential Shopify Credit System
Embedded React SPA in Shopify pages with Node API and ERP integration. Credit logic, customer portal, write-back to ERP.
Proficient Auto VIN Lookup App
JavaScript single page app inside a WordPress plugin. External VIN API lookup for an auto-transport workflow.
School Lookup App
React search single page app inside WordPress, using the Google Custom Search JSON API as the data layer.
Find-a-Surgeon-in-Your-Area App
React search SPA with PHP APIs, SQL, geolocation and map APIs. Practical pattern for "find one near me" tools.
POPIA Posture
Browser-only when the data should stay on the device
Browser-only tools that keep data in IndexedDB or localStorage do not transmit personal data to a server. That is the cleanest POPIA posture available, because there is no server processing on my side at all. The user owns the data and the JSON backup. This is the right shape for personal financial calculations, payslips, invoices, and any workflow where customer data should not leave the device. It is not the right shape for shared state, audit trails, or write-back to another system. Honest tradeoff, named up front.
Testimonials
What Clients Say
“Excellent effort and work on a tricky project. Clear communication.”
Andy Hogg
“Anton is always willing to go above and beyond to make sure everything is right. Thanks!”
Michael Honeycutt
“Anton is very knowledgeable and great at explaining technicality in a straightforward way.”
Ushi Patel
Process
How It Works
1
Tell me about the workflow
Email, phone, or WhatsApp. Two sentences are usually enough to confirm whether it is browser-only, API-connected, or embedded.
2
Free scope call on Google Meet
Remote across South Africa. One-page scope and fixed quote in ZAR.
3
Build in two-week cycles
Live preview each cycle. Handover with source, deployment notes, and a runbook.
Timeline
Typical Engagements
Most SPA work for South African businesses falls into three engagement shapes:
- Browser-only SPA: 2-6 weeks. POPIA-friendly tools where data stays in the user browser.
- API-connected SPA: 4-10 weeks. React or Next.js front end against an existing or new REST/GraphQL API.
- Platform-embedded SPA: 4-10 weeks. Shortcode app inside WordPress, configurator inside Shopify, admin dashboard inside a CRM.
Direct Access
Bigger than that?
Multi-user platforms with auth, billing, and admin live on /services/custom-platform-applications. Backend APIs and integrations live on /services/api-servers-microservices.
FAQ
Frequently Asked Questions
Is data on a browser-only tool POPIA-friendly?
Browser-only tools that keep data in the user browser (IndexedDB or localStorage) do not transmit personal data to a server. That is the cleanest POPIA posture available, because there is no server processing on my side at all. The user owns the data and the JSON backup. This only applies to the browser-only lane.
Can a single page app connect to payment gateways or existing APIs?
Yes, if the API exists and access is permitted. Payment gateways, CRMs, ERPs, WordPress, WooCommerce and Shopify integrations usually sit in the API-connected or embedded SPA lane.
Can you build this in Next.js?
Yes. The current set at /tools is Next.js with IndexedDB or localStorage. API-connected SPAs use Next.js routes or a separate Node or PHP API.
Can an SPA start free and become a paid platform later?
Yes. The browser-only version proves demand and ranks for keywords. The paid version adds accounts, an API, and shared state.
Will the SPA work offline?
Browser-only SPAs work offline once loaded. API-connected SPAs need the API to be online. Embedded SPAs need the host platform to be online.
Do you work with clients outside Cape Town?
Yes. Remote delivery across South Africa is the default. Cape Town in-person only if useful.
Need a single page app developer in South Africa?
Tell me about the workflow in two sentences. I review every enquiry personally and I will say up front whether the shape is browser-only, API-connected, or embedded.