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Web Development Services

Websites judged on what they measure.

Most web design pages describe taste. This one describes acceptance criteria. Seninweb builds WordPress websites, custom websites and web applications, e-commerce stores, and websites connected to your CRM, payment platform and other systems through APIs. Every build is handed over against numbers you can check yourself: performance, accessibility and a scope agreed in writing.

WordPress • Custom Development • WooCommerce • APIs • CRM Integrations • SEO-ready Architecture

Custom web application built from layered layout and component blocks

What Can We Build For Your Business?

From a high-performance company website to a fully integrated web application, we build around what your business actually needs to accomplish. Our website development services cover WordPress, custom development, e-commerce and the integrations that connect a site to the rest of your business.

Business Websites

Professional websites for companies that need credibility, leads and measurable business results, built to be judged on what they deliver rather than how they look in a mockup.

WordPress Development

Custom WordPress websites, themes, functionality and content structures that stay manageable after launch, so your team can edit content without calling a developer.

Custom Web Development

Web applications and custom systems built around your specific business processes instead of forcing the business into an off-the-shelf solution.

E-Commerce Development

WooCommerce and custom e-commerce development for products, subscriptions, payments, catalogues and the integrations a store depends on.

API & CRM Integrations

Connect your website to CRMs, ERP systems, payment platforms, marketing tools and telephony through our API integration and CRM development services.

Website Modernization

Improve, rebuild or migrate an existing website without unnecessarily replacing the parts that already work. Redesigns and migrations are scoped against what the current site does well.

Your Website Should Solve a Business Problem

Most of the projects we take on start with one of the situations below. You do not need to describe the technical cause. Tell us what is not working and we will find it.

"Our website gets traffic but not enough leads"

Traffic without enquiries usually points to slow pages, unclear next steps or forms that fail on mobile. We look at how visitors actually move through the site, then fix the path to contact rather than redesigning for the sake of it.

"We need to replace an outdated website"

We rebuild on WordPress or a custom stack, keep the URLs and content that already earn traffic, and hand over a site your team can maintain. Redirects and search visibility are part of the plan, not an afterthought.

"Our WordPress site has become difficult to maintain"

Plugin sprawl, page-builder lock-in and undocumented customisations are common. We reduce the site to what it needs, document what remains and make editing safe for non-technical staff.

"We need our website connected to our CRM"

Form submissions, quotes and customer accounts can flow directly into your CRM with two-way sync where it matters. See our CRM development and API integration services.

"We need an online store or customer portal"

WooCommerce or custom e-commerce for products and subscriptions, or a login-protected portal where customers see orders, documents and account details. Payments are handled through our payment integration work.

"Our site is slow, hard to manage or technically outdated"

We measure before we change anything: Core Web Vitals on a real phone, plugin and script audit, hosting and caching review. Then we fix the causes, whether that is a performance pass or a planned rebuild.

WordPress or Custom Development?

Not every project needs custom development. The question is not which technology is more impressive but which one your site can be maintained on in three years. This is the first thing we settle in discovery.

Suitable for most business sites

WordPress

WordPress development is the right choice when the site is mainly about content, credibility and being easy for your team to update.

When the site has to run a process

Custom Development

Custom web development earns its price when the website has to do something a CMS cannot do cleanly, or has to carry logic that is specific to your business.

We do not recommend custom development simply because it costs more. We choose the technology based on what the project actually needs, and many projects that arrive asking for “custom” are better served by well-built WordPress.

Why we will sometimes tell you to use a website builder

A three page brochure site with no integrations, no catalogue and no plans to grow does not need us. A builder will do it in a weekend for a fraction of the price, and we will say so rather than quote for it.

Custom work earns its price when the site has to do something: connect to your other systems, carry a catalogue that changes, compete for search terms with real competition, or survive being edited by several people without breaking.

A computer monitor and keyboard on a clean desk

Connect Your Website to the Systems You Already Use

A modern business website rarely stands alone. It has to pass enquiries to a CRM, take payments, sync stock, trigger emails or talk to a phone system. We build those connections as part of the website rather than bolting them on afterwards. Where a platform offers a native connector we use it; where it does not, we build the integration and tell you which is which.

CRM & business software

CRM, ERP, helpdesk and accounting systems. Leads, quotes and customer records flow between the website and the tools your team already works in. See CRM development and Zoho integration.

Payments & commerce

Payment gateways, subscriptions, invoicing and stock. We build on WooCommerce, and work with Shopify and PrestaShop through extensions and custom modules. Details on the payment integration page.

Marketing & email platforms

Email marketing tools, automation platforms, analytics and tracking, so campaigns and forms share the same data instead of separate lists. See our email marketing service.

Telephony & VoIP

Click-to-call, call logging against CRM records and screen pops from the website. We integrate FreePBX and Asterisk-based systems and build custom VoIP features.

REST APIs & webhooks

Custom endpoints, webhook receivers, authentication (OAuth, API keys, SSO), retries and error handling. This is the plumbing behind most of the categories on this list. See API integration.

Booking, inventory & portals

Booking and scheduling systems, inventory and stock feeds, and customer portals where clients log in to see orders, documents or account details.

Built With SEO in Mind

SEO should not be something added after development. Site structure, templates, speed and markup are decided during the build, and they are expensive to change afterwards. We build the technical foundation that allows your SEO strategy to work properly. We do not promise rankings; nobody honest can. We make sure the website is never the reason a ranking is held back.

Structure and crawlability

Speed and technical foundations

Performance Is Part of the Build

Performance is not a tuning step at the end. It is a launch criterion we agree with you at the start, measured on a phone over a mobile connection, and listed below in the numbers we actually sign off against.

Fast on Mobile

Most visitors to a business website arrive on a phone, often on a slow connection. We test on mobile first because that is where a slow site loses enquiries, and desktop results follow.

Core Web Vitals

We measure loading, interactivity and layout stability against Google's Core Web Vitals thresholds rather than describing the site as "fast" or "optimized". You can run the same test yourself.

Efficient Code & Assets

Unnecessary scripts, excess plugins, oversized images and badly implemented third-party embeds are what usually slow a site down. We keep them out of the build and audit what has to stay.

Two monitors set up side by side on a desk

What the site has to pass before we invoice

Core Web Vitals green on mobile rather than desktop: largest contentful paint under 1.8 seconds on a 4G connection, interaction to next paint under 200 milliseconds, cumulative layout shift under 0.05. You can run the same test we do, on your own site, from your own phone.

Accessibility to WCAG 2.2 AA, checked with automated tooling and then by hand with a keyboard and a screen reader, because automated scans catch under half of the failures that matter.

Accessibility Isn't an Afterthought

An accessible website is a responsible build, and it is also simply a better one: clearer structure, forms that work, pages that can be used with a keyboard. We build to WCAG 2.2 AA and check it by hand, because automated scans catch under half of the failures that matter.

What Is Included in a Web Development Project?

The exact scope depends on the project and is agreed in writing before work starts. A typical website development project from us includes the following.

How We Build Your Website

Five stages, each with a defined output. The order matters: decisions about technology and structure are made before development starts, not discovered during it.

Step 1

Discovery

We understand your business, your users, the requirements and the systems the site has to work with. This is where we tell you whether WordPress, custom development or a website builder is the right answer.
Step 2

Architecture

We define the site structure, the technology, the integrations and the content plan, and agree the scope and price in writing.
Step 3

Development

We build the website and its functionality against the agreed scope on a staging environment, with placeholder content where yours is still being written.
Step 4

Testing

Performance on mobile, responsiveness, accessibility, forms, integrations and the critical business functions are tested against the criteria set in discovery.
Step 5

Launch & Handover

We deploy the website, verify the production environment, set up analytics and Search Console, and hand over the system with documentation your team can use.

How Long Does Website Development Take?

Most typical projects take approximately 4 to 10 weeks, depending on scope, integrations, content readiness and feedback cycles. We do not promise an exact delivery date before discovery, because until then nobody knows the scope. After discovery you get a schedule with your dependencies and ours stated separately.

What affects the timeline

01

Project complexity

02

Number of pages and templates

03

Custom functionality

04

Integrations with other systems

05

Content availability

06

Client feedback cycles

07

Migration requirements

The bottleneck is content, and we plan around it

Projects rarely run late because of code. They run late waiting for text, photographs and a final answer on pricing. We agree what we need and when, and we build against placeholder content so the site is finished and waiting rather than blocked.

A typical build runs four to ten weeks depending on scope. Where content is still being written we will say plainly which parts of that timeline are ours and which are yours.

A desk with two computer monitors and a keyboard

Web Development for Different Business Needs

The right build depends on what the website has to do for the business. These are the project types we take on most often, and where a dedicated service page exists we link to it.

Corporate Websites

Company sites that need credibility, clear structure and a CMS several departments can edit safely.

Service Business Websites

Local and regional service companies that need enquiries, booking and calls to reach the right person.

B2B Websites

Longer sales cycles, gated content, lead capture that feeds a CRM and pages a sales team can actually use.

E-Commerce

WooCommerce and custom stores with catalogues, subscriptions and payments. See e-commerce solutions.

Customer Portals

Login-protected areas where clients see orders, invoices, documents or support tickets pulled from your systems.

Membership Websites

Paid or gated content, member accounts, renewals and access rules handled cleanly on WordPress or custom.

Booking Websites

Appointments, reservations and scheduling connected to your calendar, payments and confirmations.

Web Applications

Custom applications built around a business process rather than a page layout, with proper testing and handover.

CRM-connected Websites

Forms, quotes and accounts that sync with your CRM. See CRM development.

API-driven Websites

Sites that pull from or push to other systems through REST APIs and webhooks. See API integration.

Multi-language Websites

Language and region structures that search engines can crawl and editors can maintain without duplicating work.

Website Rebuilds & Migrations

Moving platforms or hosts while keeping URLs, content and search visibility intact.

Technologies We Work With

A short list, on purpose. These are the technologies we build and support in production.

CMS

Backend & Custom

Frontend

Infrastructure & Integration

Selected Web Development Projects

Real projects, real numbers. Each entry lists the problem, the solution, the technology and the result.

Client / project name

Business type

Client / project name

Business type

Client / project name

Business type

Not Sure What You Need?

You do not need to know which framework, plugin or architecture your website needs. Tell us what you want the website to accomplish and we will help determine the appropriate technical approach, including whether you need us at all.

What Kind of Website Are You Planning?

Pick the closest match, then tell us what the site has to do. Project type, rough page count, required integrations, your existing website URL, the launch timeframe you have in mind and the main business objective are the most useful things to include. We do not display prices because an estimate before discovery is a guess.

Web Development FAQs

Straight answers to the questions we are asked most before a project starts.

Web design decides how a website looks and how its pages are laid out. Web development builds the working site: the code, the CMS, the forms, the integrations and the performance behind it. Most business websites need both, and on our projects design decisions are made against what the site has to do rather than as a separate exercise.

It depends on scope, which is why we do not publish prices or quote before discovery. A content site on WordPress, an online store and a custom web application are very different amounts of work. After discovery you get a fixed price for an agreed written scope, so the figure at the end matches the one at the start. If a website builder would serve you better, we will say so instead of quoting.

Most typical builds take four to ten weeks. Complexity, number of pages, custom functionality, integrations, migration and how quickly content and feedback arrive all move that. We give a dated schedule after discovery and state which dependencies are ours and which are yours.

WordPress for content-driven, marketing and service business sites and for WooCommerce stores, because it is easy to manage and widely supported. Custom development when the site has to run a specific business process, act as a customer portal or web application, or carry integrations and logic a CMS cannot handle cleanly. We do not recommend custom work because it costs more; see the comparison above.

Yes. A redesign starts with what the current site does well: which pages earn traffic, which URLs must be kept, what content is worth preserving. We then rebuild on WordPress or a custom stack with redirects, performance and accessibility handled as part of the project.

Yes. Enquiry forms, quotes, bookings and customer accounts can be pushed into your CRM, and in many cases synced both ways. See our CRM development and Zoho integration pages for how that work is scoped.

Yes. REST APIs, webhooks, authentication and third-party services are a normal part of our builds, with retries and error handling designed in. If your website needs to communicate with an external CRM, payment platform or business application, see our API integration service.

Yes. We build WooCommerce stores and custom e-commerce solutions covering catalogues, subscriptions, payments and stock integrations, and we develop extensions for Shopify and PrestaShop. See e-commerce solutions and payment integration.

Yes. Platform and hosting migrations are planned around keeping content, URLs and search visibility intact: full redirect mapping, content audit, staging verification and a launch checklist before DNS changes.

The technical foundation will be: crawlable structure, semantic HTML, clean URLs, metadata structure, fast mobile pages and Search Console set up at launch. That is what allows an SEO strategy to work. We do not promise rankings, because rankings also depend on content, competition and factors outside the build.

Usually, and we measure first. A performance pass looks at Core Web Vitals on mobile, plugins, scripts, images, hosting and caching, then fixes the causes. Where the underlying build is the problem we will tell you that a rebuild is the honest answer rather than sell repeated tuning.

Yes. Every project is handed over with documentation so you are not dependent on us, and ongoing maintenance, updates and support can be agreed separately if you want them.

Yes. We build custom applications in PHP and Node.js around a defined business process: customer portals, dashboards, internal tools and integration layers. Scope, testing and handover are agreed in writing before development starts.

Have a Website Project in Mind?

Tell us what you are trying to build, improve or integrate. We can help you determine the right technical approach before development begins.

No obligation. We will first understand the project and tell you what approach makes sense.