Web Application Development Services
Responsive, maintainable web applications, built with a modern stack and backed by cross-browser QA before every release.
Our web development service builds responsive websites and web applications using a modern, maintainable stack — the same kind of architecture powering this site. We pair development with cross-browser and cross-device testing throughout the build, so layout, functionality and performance are validated continuously.
Whether you need a marketing site, a customer-facing web application, or an internal tool, we build it with clean, well-structured code and a documented QA process behind every release.
Who This Service Is For
This service is a fit if you're:
- Launching a new website or web application
- Replacing a slow, outdated or hard-to-maintain site
- Building a customer portal, dashboard or internal tool
- Needing web development capacity backed by structured QA, not just code delivery
Problems This Solves
- Sites that look right in one browser but break in another
- Layout and functionality issues on mobile and tablet screens
- Slow page performance that hurts user experience and search rankings
- No structured testing process before changes go live
Benefits & expected results
A responsive site that works correctly across the browsers and devices your visitors use
Clean, maintainable code that's easier and cheaper to extend over time
Performance and accessibility validated as part of the build, not bolted on afterward
A documented QA sign-off before every release
What's included
Our process for this service
Understand
Review requirements, target browsers and devices before development starts.
Build
Develop in incremental, testable pieces with continuous review.
Test
Validate functionality, layout and performance across browsers and screen sizes.
Harden
Run full regression and accessibility passes ahead of release.
Release
Support deployment and final QA sign-off.
This mirrors our full 8-step QA process, scoped to this service.
Stack & tools
What you receive
- Production application source code
- Browser and device compatibility matrix
- Bug reports with reproduction steps and severity ratings
- Accessibility findings
- Final QA sign-off report
Why we combine development and QA
Browser and device fragmentation on the web is just as real as it is on mobile. Testing throughout the build — not only at the end — means layout and functionality issues are caught while they're still cheap to fix.
Example project
Our example project walkthrough includes a Next.js web application tested across Chrome, Safari, Firefox and Edge. It's a sample project used to demonstrate our process, not a claimed client outcome.
View Northlane walkthroughFrequently asked questions
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Ready to start a project?
Tell us about your app or website and we'll put together a plan for development, testing and release.
Start a Project