Fulminous Software is a UK-focused eCommerce development company building high-converting online stores, B2B commerce portals and multi-vendor marketplaces. From Shopify and Magento to fully bespoke headless commerce, we design, develop and scale eCommerce platforms engineered for speed, security and sales.
Whether you are launching a D2C brand, moving a retail business online or building a complex B2B ordering portal, our team plans, designs and engineers your store around your products, customers and growth targets. As an experienced custom web development company, we build eCommerce platforms that are fast, search-friendly and easy to manage.
Projects Delivered
Years of Experience
Client Retention Rate
In-House Experts
A well-engineered online store is more than a catalogue with a checkout. It is a revenue engine built for conversion, retention and scale.
UX-led design, fast page loads and frictionless checkout flows reduce basket abandonment and turn more visits into orders.
Architecture that handles seasonal spikes, growing catalogues and international expansion without re-platforming every two years.
Clean code, structured data, Core Web Vitals optimisation and crawlable category structures that help your products rank.
PCI DSS aligned payment integrations with Stripe, PayPal, Klarna, Apple Pay and Google Pay — protecting customers and your reputation.
Automated inventory sync, order routing, shipping labels and ERP/CRM integrations that cut manual admin work dramatically.
Analytics, heatmaps and conversion tracking baked in from day one, so every design and marketing decision is backed by data.
We treat every store as a commercial product, not a design project. Every decision — platform, architecture, UX — is made against one question: will it sell more?
Product pages, navigation and checkout journeys designed around real buyer behaviour, tested and refined with analytics.
Sub-2-second load times, image optimisation, CDN delivery and caching strategies that keep mobile shoppers engaged.
ERP, CRM, POS, accounting, shipping and marketing tools connected through robust APIs — one source of truth across your business.
VAT handling, UK GDPR, Royal Mail and DPD integrations, Klarna and Clearpay — built for how British customers actually shop.
We recommend the platform that fits your business case — not the one we prefer to build. Shopify, Magento, WooCommerce or custom.
Most of our clients stay with us for years. We support, optimise and grow stores long after launch day.
Get a free consultation and a detailed project estimate within 48 hours.
From first-time founders to established retail groups, we tailor scope, platform and budget to where your business is today — and where it is heading.
Fast, affordable store launches on Shopify or WooCommerce with a clear roadmap to scale as your brand grows.
Bring your physical shop online with POS sync, click-and-collect, local delivery and unified stock management.
Complex catalogues, tiered pricing, quote workflows, credit accounts and ERP-integrated ordering portals for wholesale buyers.
High-end storefronts with 360° product views, bespoke configurators and secure checkout — including a dedicated eCommerce platform for jewellery businesses.
Multi-vendor platforms with seller onboarding, commission management, split payments and vendor dashboards.
Recurring billing, subscription management portals, dunning flows and churn-reduction features for box and SaaS-style commerce.
Everything you need to launch, run and grow an online store — under one roof, with one accountable team.
Fully bespoke storefronts and back-office systems built around your exact workflows, catalogue structure and customer journeys.
Store setup, custom theme development, Shopify Plus builds and app development from our specialist Shopify web development company team.
Enterprise-grade stores with large catalogues, multi-store setups and B2B modules, delivered by our Magento web development firm.
Flexible, content-rich stores on WordPress — ideal for brands that sell through storytelling. Backed by our WordPress web development services.
Native and cross-platform shopping apps synced with your web store, built by our mobile app development company team with push notifications and in-app checkout.
Zero-downtime migrations between platforms with full data transfer, SEO-safe redirects and post-launch monitoring.
Decoupled architectures with lightning-fast frontends and API-driven backends for maximum flexibility and speed.
Payment gateways, ERPs, CRMs, PIM, shipping carriers, marketplaces (Amazon, eBay) and marketing automation — all connected.
Proactive monitoring, security patching, updates and enhancements through our IT support and maintenance services.
Complementary services that keep your store competitive after launch.
Every store is different, but the fundamentals of great commerce stay the same. Here is a sample of what we deliver.
Before you sign with any agency — including us — check these things. They separate reliable partners from risky ones.
We win and keep clients on reliability, not just price. Here is what working with us actually looks like.
Defined scope, milestones and acceptance criteria in every agreement — no vague promises, no surprise invoices.
Daily standups and same-day responses during UK business hours. You always know exactly where your project stands.
Data processing agreements, secure development practices and privacy-first architecture on every engagement.
Low staff turnover means the developers who start your project finish it — and support it afterwards.
Stores architected so adding markets, languages, channels or product lines is an iteration, not a rebuild.
If a £5,000 Shopify store serves you better than a £50,000 custom build, we will tell you — and prove why.
Online stores handle payment data, personal details and order histories. We treat security as a core feature, not an afterthought.
Trust badges are only as good as the engineering behind them. We document our security measures so you can answer customer, auditor and payment-provider questions with confidence.
A proven six-step process that keeps projects on time, on budget and free of surprises.
We map your products, customers, competitors and operations, then define the platform, feature set and success metrics for the project.
Wireframes, user journeys and high-fidelity designs focused on conversion — reviewed and approved by you before a line of code is written.
Agile sprints with fortnightly demos. Storefront, backend, integrations and admin tooling built to the approved designs and specifications.
Products, customers, orders and content migrated and validated. SEO redirects mapped so existing rankings are protected.
Functional, performance, security and payment testing across devices and browsers — including full end-to-end purchase flows.
Controlled go-live with monitoring, then ongoing optimisation: CRO experiments, feature releases and performance tuning.
Every project is quoted individually, but these ranges give you an honest starting point for budgeting.
For new brands launching fast
For scaling brands & retailers
For complex, high-volume commerce
Send us your requirements and get a free, no-obligation platform recommendation with cost comparison.
Need to extend your in-house team instead of outsourcing the whole project? Hire vetted eCommerce specialists on flexible terms.
Storefront developers skilled in modern JavaScript frameworks from our ReactJS development company team, building fast, responsive shopping experiences.
API, integration and platform engineers — including experts from our Node JS development company practice for headless and custom commerce backends.
Designer, developers, QA and a project manager as one accountable unit — scaled up or down as your roadmap demands.
From first call to a working developer on your project in as little as one week.
Tell us your platform, tech stack, timeline and the skills you need. We respond within one business day.
We shortlist developers with directly relevant eCommerce experience and share CVs, portfolios and availability.
Interview candidates yourself and, if you wish, start with a paid trial sprint before any long-term commitment.
Your developer joins your tools and rituals, with our management layer ensuring quality and continuity throughout.
Choose the commercial model that matches your project's certainty, budget and pace.
Best when requirements are clear. Agreed scope, agreed price, agreed deadline — with milestone-based payments so you only pay for delivered work.
A stable, full-time team working exclusively on your product. Ideal for marketplaces and stores with continuous roadmaps.
Maximum flexibility for evolving requirements. Transparent hourly rates, detailed timesheets and monthly billing.
Proven technologies chosen for performance, security and long-term maintainability.
Real results from real eCommerce projects.
We architect stores so tomorrow's capabilities are an upgrade, not a rebuild.
Tell us about your products and goals. Within 48 hours you'll receive a tailored proposal covering platform recommendation, feature scope, timeline and a transparent cost estimate.
Straight answers to the questions we hear most from businesses planning an eCommerce project.
A template-based online store typically starts from £4,000–£10,000, a custom mid-sized eCommerce website ranges between £12,000–£35,000, and enterprise or marketplace platforms can go from £40,000 upwards depending on features, integrations and scale. We provide a fixed written quote after a discovery call.
A standard Shopify or WooCommerce store takes 3–6 weeks. A custom eCommerce platform usually takes 8–16 weeks, while large marketplaces or headless commerce builds may take 4–8 months depending on complexity.
Shopify suits fast launches and D2C brands, WooCommerce is ideal for content-driven stores, Magento (Adobe Commerce) fits large catalogues and B2B, and custom or headless builds are best when you need complete control, unique workflows or very high scale. We give a written recommendation with cost comparison before you commit.
Yes. We handle full re-platforming including product, customer and order data migration, URL redirects to protect SEO rankings, payment and shipping reconfiguration, and post-migration testing with zero-downtime cutover.
Yes. Every store we build follows PCI DSS guidelines for payment handling and UK GDPR requirements for customer data, including consent management, cookie policies, encrypted data storage and right-to-erasure workflows.
Absolutely. We integrate eCommerce platforms with ERPs, CRMs, POS systems, inventory management, Xero, QuickBooks, Sage, shipping carriers, payment gateways and marketing automation tools through APIs and middleware.
Yes. We offer flexible support and maintenance plans covering security patches, platform updates, performance monitoring, bug fixes, feature enhancements and 24/7 emergency support for critical issues.
Yes. We build native and cross-platform mobile commerce apps for iOS and Android that sync with your web store in real time, supporting push notifications, mobile wallets and in-app checkout.
Our offshore IT consulting services along with the AI-powered core helps top companies stay competitive, win new markets and increase shareholder value.
