# Custom application development for web and mobile

> Custom web and mobile application development for Canadian businesses: discovery, UX, AI-assisted development, integrations, QA and launch support.

Source: https://npcoding.ca/services/application-development/

We design and build web applications, iOS and Android apps, eCommerce platforms and customer portals. You get clean code, AI-assisted engineering under senior review, a security-first mindset and a team that treats your product like its own.

Part of the [Software & App Development](https://npcoding.ca/services/ai-software-engineering/) capability.

## Overview

A great application isn't just code. It's the bridge between your business and the people who use it — customers, staff and partners. We start with deep-dive discovery to map your workflows, then build in short, iterative sprints so you see working software early and can change direction without waste.

Whether it's a high-performance web portal, a cross-platform mobile app or a back-office tool that replaces a tangle of spreadsheets, we handle the full journey: UX and interface design, front-end and back-end development, integrations, cloud infrastructure, QA and release. AI agents speed up the implementation; engineers review every change, and after launch we can keep running and improving the app.

## Is this the right service?

Choose Web & Mobile App Development when:

- You know the workflow the software must support: a portal, an internal tool, an app for existing customers
- Requirements can be specified up front, even if they evolve sprint by sprint
- Success means people who already need the software adopting it

Consider instead:

- [Software Product Engineering](https://npcoding.ca/services/software-product-engineering/) when you're validating a new product idea and still finding what customers will pay for
- [Enterprise Application Integration](https://npcoding.ca/services/enterprise-application-integration/) when the main job is connecting systems you already have

## What's included in web & mobile apps

- **Web applications:** Browser-based platforms, dashboards and SaaS products that run anywhere — no installation required.
- **iOS & Android apps:** Native and cross-platform mobile apps, from specification and UX to App Store and Google Play release.
- **Customer & partner portals:** Secure self-service portals with role-based access, private pricing and per-partner content areas.
- **eCommerce platforms:** Stores designed to convert, connected to payments, automatic invoicing, inventory and ERP.
- **Internal tools & automation:** Back-office systems that remove manual work and connect the tools your team already relies on.
- **Plugins & extensions:** Custom plugins that add capabilities — members clubs, promotions engines and more — to existing platforms.

## How AI assists app development.

Where AI helps:

- Scaffolding screens, APIs and data models from agreed specifications
- Implementing features in small, reviewable changes
- Drafting unit and end-to-end tests for each feature
- Keeping API documentation and READMEs in step with the code

What our experts own:

- Platform choices: web, native or cross-platform
- Reviewing and approving every change
- Security and data-handling decisions
- App Store and production release decisions

## How NPCoding delivers it

1. **Discover:** Workshops to map your workflows, users and goals. You get a precise specification and a realistic plan.
2. **Design:** User flows, prototypes and interface design, validated with you before production code is written.
3. **Build:** Agile sprints: engineers scope the work, AI agents help implement it and every change is reviewed, with a working demo at the end of each sprint.
4. **Test & secure:** Automated and manual QA, security review, accessibility and performance checks on real devices.
5. **Launch & support:** A controlled release with monitoring, then ongoing support for fixes, upgrades and new features.

## Connected capabilities

- [Product Design & UI/UX](https://npcoding.ca/services/product-design-ux/): Flows, screens and states are designed and validated before development, then handed over with acceptance criteria.
- [QA & Release Assurance](https://npcoding.ca/services/qa-testing/): Each release is tested against those criteria on the browsers and devices your users rely on.
- [DevOps & Managed Operations](https://npcoding.ca/services/devops-managed-operations/): Pipelines, monitoring and store or hosting releases are set up from the first sprint, not the week before launch.

## How we build with AI

Build your web or mobile app with Claude Code and Codex, or in a private AI environment when your data calls for it.

- [Private / Local AI Engineering](https://npcoding.ca/services/private-ai-engineering/): AI-powered software delivery in a controlled processing environment.
- [Claude Code & Codex Engineering](https://npcoding.ca/services/claude-code-codex-engineering/): AI-accelerated delivery with Claude Code and OpenAI Codex, directed by experienced engineers.

## Why NPCoding

- **Built around your workflow:** Software shaped to your processes — not the other way around — so adoption is fast and friction is low.
- **A senior, accountable team:** You work directly with the people building your product, with full transparency at every step.
- **Foundations that scale:** Clean architecture and documented code that is ready for new features, new markets and more users.

## Tools and technologies

TypeScript, React, Next.js, Node.js, PHP, Flutter, React Native, Swift, Kotlin, PostgreSQL, MySQL, Shopify, WordPress, AWS, Google Cloud

## Industries

- [eCommerce](https://npcoding.ca/industries/e-commerce/)
- [Startups](https://npcoding.ca/industries/startups/)
- [Fashion](https://npcoding.ca/industries/fashion/)
- [Education](https://npcoding.ca/industries/education/)

## Related work

- [Gato: one fashion brand, three storefronts — web, mobile apps and a private wholesale portal](https://npcoding.ca/case-studies/gato/): An online store, two native shopping apps and a password-protected wholesale catalog for a contemporary fashion brand that sells to both consumers and trade buyers.
- [Hebrew University: a researcher portal powered by the university's own systems](https://npcoding.ca/case-studies/hebrew-university/): A fully custom English portal that shows researchers every instrument available for rent across departments and areas of expertise — with data pulled live from the university's systems through an API.
- [Yifat: three mobile apps for a media-intelligence group](https://npcoding.ca/case-studies/yifat/): Native iOS and Android apps for the Yifat group: Vigo for managing communication crises, Info Buzzer for real-time media alerts, and Tenders Mobi for tracking public tenders.
- [Nature's Chef: a farm-to-door store wired into the Priority ERP and weighing carts](https://npcoding.ca/case-studies/natures-chef/): An eCommerce site for a third-generation fruit and vegetable farmer, connected to the Priority ERP and to weighing carts so the business knows exactly what was ordered, weighed and shipped.

## Frequently asked questions

### How much does custom application development cost?

It depends on scope, platforms and integrations. Most projects begin with a specification phase that produces a detailed scope, timeline and estimate, so you know the investment before development starts. For ongoing work, you can also keep a dedicated team on a monthly basis.

### How long does it take to build an app?

A focused first release can often ship within a few months, while larger platforms are delivered in phases. Because we release working software every sprint, you can launch the most valuable features first and grow from there.

### Should we build a native or a cross-platform mobile app?

Cross-platform frameworks such as Flutter or React Native let one codebase serve iOS and Android, which lowers cost for most business apps. Native development makes sense when you need deep device features or maximum performance. We recommend the right option after understanding your product.

### Can you take over an existing project?

Yes. We start with a code and architecture review, stabilize what's there and then improve it. One tourism company came to us with a stalled, expensive project — we continued the existing code, rebuilt the product's weak foundations and led it to a successful launch at a significantly lower cost than continuing the old way.

### Do you work with clients outside Toronto?

Yes. We work with clients across Canada and internationally. Collaboration runs through video calls, shared boards and regular sprint demos, so distance never slows the project down.

Discuss your app: https://npcoding.ca/contact/?topic=build&service=engineering#enquiry

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NPCoding · AI-powered software & app development · Toronto, Canada · support@npcoding.com · https://npcoding.ca/contact/