Custom Web & App Development

Software built for your business, not the other way around.

WEB & APP DEV

Fast, scalable web applications and custom software solutions built with modern, enterprise-grade technology. We design and develop tailored digital products that solve your specific business challenges and provide a seamless experience for your users.

Next.jsReactNode.jsTypeScriptPostgreSQLSupabaseVercelDocker

The problem

Off-the-shelf software forces you to adapt your processes to fit its limitations. When the tool doesn't fit the workflow, teams work around it, creating inefficiency, data loss, and frustration.

The result

A purpose-built digital product that works exactly the way your business works: scalable as you grow, and built on technology that won't become a liability in two years.

What's included

Everything you need. Nothing you don't.

Discovery & Requirements Scoping

A structured workshop to map your business requirements, user needs, and technical constraints before a line of code is written. This prevents scope creep, eliminates misalignment, and produces a clear project specification.

System Architecture & Database Design

We design the technical architecture of your application before building: data models, API structure, authentication flows, and third-party integrations. Decisions made here determine scalability and maintainability for years.

Frontend Development

A fast, accessible, responsive user interface built with React and Next.js. Whether it's a web application or a Progressive Web App (PWA) installable on mobile, the frontend is built for performance and usability.

Backend API & Business Logic

A robust backend that handles your application's data, rules, and processes, built with Node.js and PostgreSQL. APIs are documented, secured, and designed to support both your current needs and future growth.

Third-Party Service Integrations

We connect your application to the external services it depends on: payment gateways, CRMs, email platforms, SMS providers, shipping APIs, and more. Every integration is tested thoroughly before go-live.

QA Testing & Performance Optimisation

Systematic quality assurance across browsers, devices, and user flows before launch. Performance is measured and optimised: load times, database query efficiency, and server response times are all benchmarked.

Deployment & DevOps Setup

We deploy your application to production infrastructure (Vercel for frontend, managed databases for backend), with environment configuration, domain setup, SSL certificates, and monitoring in place from day one.

Documentation & Team Onboarding

Comprehensive technical documentation covering your system's architecture, API endpoints, and deployment processes. A handover session ensures your team understands how to use, manage, and extend what we've built.

See the work

Not just talk: browse the case studies.

View portfolio →

FAQ

Common questions about Custom Web & App Development.

How is custom app development different from a standard website?+

A website presents information and drives enquiries. A web application handles business logic, user accounts, data management, and complex workflows. Think booking systems, client portals, inventory management, or reporting dashboards: tools your business runs on, not just presents with.

What technology stack do you build on?+

We build web applications with Next.js and React on the frontend, Node.js on the backend, and PostgreSQL (via Supabase) for the database. This stack is modern, widely supported, and scalable from a handful of users to tens of thousands.

Can you take over or extend an application someone else built?+

Sometimes. It depends on the codebase quality, documentation, and technology used. We'll conduct a code audit before committing: if the existing code is maintainable, we can extend it; if it's not, we'll tell you honestly rather than inherit technical debt.

How do you handle ongoing maintenance after launch?+

We offer ongoing development retainers for clients who need continued feature development, bug fixes, and infrastructure management. We can also hand over to an in-house team with full documentation and a knowledge transfer session.

Get In Touch

Start your project.

CONTACT

Tell us about your business and what you're trying to achieve. No obligation, just a conversation to see if we're the right fit.

// We work with a small number of clients at a time. Every enquiry gets a considered response, not a template.

Emailhello@kenosonic.co.za
LocationJohannesburg, South Africa
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