Feature Development

Website Feature Development for Existing Sites

Add powerful new functionality to your existing website without a rebuild | Custom modules, integrations, automations, dashboards and complex forms — built fast and clean

Describe Your Feature Feature Gallery

1–3wk

Typical feature delivery time

100+

Features delivered

All platforms

WordPress, Shopify, custom

Agile

Weekly delivery milestones

Website Feature Development for Existing Sites

Website Feature Development from Global One Digital adds powerful new functionality to your existing website without requiring a full rebuild. We ship custom modules, integrations, automations, dashboards and complex forms — preserving your current site, brand and content while adding what your team needs to serve customers better and operate more efficiently.

When feature development is the right move

Feature development beats redesign when your current site works for the bulk of users but lacks specific functionality. Common scenarios: adding a customer portal to a marketing site, integrating CRM forms with proper attribution, building a knowledge base or documentation hub, adding e-commerce functionality to a content site, building custom calculators or interactive tools, adding multi-language support, or shipping any feature that needs to live inside your existing user experience rather than as a separate application.

What is typically included in feature engagements

Standard scope covers feature scoping and technical design, implementation in your existing tech stack (we work with whatever you have, not what we prefer), integration with your CMS, CRM and analytics, accessibility compliance for the new feature matching the rest of the site, performance testing to ensure the addition does not slow existing pages, plus documentation for your team to maintain or extend.

Stack we work with

WordPress (most common): custom plugins, custom Gutenberg blocks, WooCommerce extensions, integration with HubSpot, Salesforce or other CRM. Drupal: custom modules, content type extensions, integration work. Headless CMS (Strapi, Sanity, Contentful) with React, Vue or Next.js frontend. Custom PHP, Node or Python applications: feature additions in your existing codebase. Static sites: feature additions via JavaScript or moving toward dynamic functionality where needed.

Where typical feature work struggles

Most agencies treat feature additions like new builds — full design, full architecture, full timeline. Real feature work respects what already exists: matches existing visual patterns, follows your code conventions, integrates with current data models rather than creating parallel ones. We onboard with a one-week audit of your existing site and codebase before designing the feature, ensuring the addition feels native to the rest of the experience.

Realistic timelines

Small feature (form integration, simple new page type): one to three weeks. Mid-size feature (custom module, multi-page workflow, integration): four to eight weeks. Complex feature (full new section, multi-step workflow, deep integration): eight weeks or more.

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Three tiers, transparent ranges

from 4,000

project

Discovery + design system
Up to 5 page templates
CMS setup (WordPress/Strapi)
Mobile responsive
1 month post-launch support

Get started

from 12,000

project

Custom design system
Up to 20 templates / dashboard screens
Headless CMS or custom backend
API integrations (CRM, ERP, payments)
Performance + accessibility tuning
3 months post-launch support

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from 30,000

project

Multi-language and multi-region
Enterprise integrations
Advanced security and compliance
Performance at scale (CDN, edge)
Long-term retainer for evolution

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Describe your project — we'll reply within 24 hours with a detailed proposal.

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What you get with Global One Digital

Senior engineers and specialists

No juniors learning on your project. Every engagement is led by people who have shipped 30+ similar projects.

Transparent process and reporting

Weekly updates, monthly reviews, clear scope. You always know what is being done and why.

B2B and SaaS focus

We work with growing businesses — not enterprise bureaucracy, not consumer apps. Our process fits your scale.

USA, EU and CIS markets

Time zones overlap with US East and Central Europe. We deliver in English and Russian.

Modern stack, no legacy traps

React, Next.js, Laravel, Node, Python and modern WordPress. No vendor lock-in, no proprietary framework dead-ends.

Long-term partnership, not project flings

Most clients work with us for 2+ years. We document everything, hand off cleanly and stay reachable for what comes next.

Who we build for

B2B SaaS founders

Growing B2B teams

DTC and ecommerce operators

Russian-speaking entrepreneurs

How we build websites and web apps

Discovery call

Audit and proposal

Build / implementation

Launch and handover

Ongoing optimization

Frequently asked questions

How long does a typical project take?

A landing site: 4-6 weeks. A mid-size web app or ecommerce platform: 8-12 weeks. Complex multi-language platforms: 16+ weeks. Discovery call narrows it down for your specific scope.

What technology stack do you use?

For frontend: React, Next.js, Vue, Nuxt. For backend: Node, Laravel, Python, PHP. For CMS: WordPress (mature) and Strapi (headless). We pick the stack that fits your project, not the other way round.

Will you work with our existing developers?

Yes. We frequently embed into existing engineering teams, work in your repository, follow your code review process and hand off cleanly when our work is done.

Do you provide design or just development?

Both. We have senior designers who specialise in B2B and SaaS. If you already have design (Figma, Sketch), we work directly from your files.

What does post-launch support look like?

Every project includes a bug-fix window (1-3 months depending on tier). After that we offer maintenance retainers from $400/mo. Most clients stay on a retainer for ongoing iteration.

Can you migrate our existing site to a new platform?

Yes. Migrations are a regular part of our work — WordPress to headless, Wix to Shopify, custom CMS to modern stack. We preserve content, redirects and SEO equity.

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