Ecommerce development
Ecommerce development
We build and connect e-commerce: from a scalable storefront to the marketplace, payment and warehouse integrations and the numbers behind it. The code stays yours.
Clients rate us 4.9
- 6+ sources connected
- One live source of truth
- Fixed price up front
- Code stays yours
Built for, among others
The problem
What gets in the way
Most webshop agencies stop at the shop window.
Your numbers live everywhere and never on time
Revenue in the shop, costs at the marketplaces, the warehouse and advertising somewhere else. Every week you paste it together by hand, and by then it's already out of date.
A marketplace feed that stops is spotted too late
A connection with bol.com or Amazon that stops, a payment status that never comes back, stock that doesn't update. Without monitoring you only notice when a customer complains.
The platform doesn't grow with you
A shop that ran fine at 50 orders a week gets stuck at 500: plug-ins that clash, a checkout that stutters, and nobody who knows where it goes wrong.
You're stuck with the agency that built it
No access to the source code, everything runs through one party, and every change is a quote. In effect you pay a subscription for your own shop.
How we look at it
But that's where it starts. Because the moment you start selling, your numbers scatter: revenue in the shop, fees in the marketplaces, costs in the warehouse, ad spend in the ad platforms. And then nothing lines up anymore.
Read more
We build e-commerce from both sides. The storefront itself, on a platform that grows with you. And everything behind it: the integrations to marketplaces, payment providers and warehouse, plus a layer that pulls all those scattered numbers into one set you can actually steer on.
You're not tied to us and the price is fixed upfront. We think along with you: we listen first to what you want to achieve now and where you are heading, then choose the technology to match, for the most scalable and powerful result that is cost-efficient at the same time.
What we build
How we help
Shopify when it fits, custom when you need it. Fast, designed for mobile first, and built to grow from your very first order.
Sell on several channels without double work. We connect marketplaces such as bol.com and Amazon, so orders, stock and costs come together in one place.
We connect your payment provider and your warehouse system to the shop, with checks and monitoring. A missed payment status or a connection that stalls doesn't go unnoticed.
One dashboard with revenue, margin, average order value and the split across your sales channels. The figures are current and all your sources sit together.
The full source code is and stays yours, with no hidden dependency. We agree the price upfront.
What we built
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Reviews
What our clients say about us.
4.9 · based on client reviews
From spreadsheet to a real platform
“They turned our scattered spreadsheets into a full real-estate platform, including WWS calculations and an investor portal.”
Philippe van der MarkMastoneThought along, delivered fast
“A team that thinks along and delivers: quick to act, cleanly shipped and exactly what we had in mind.”
Nico WerkmanDecathlonA beautiful website our members love
“TopDevs delivered a beautiful, fast website where our members and new runners find their way around right away.”
Huub SteinmannLoopgroep Grave
Our approach
From idea to working software in four phases
Every project runs through the same four phases, so you always know what's happening, what comes next and what it costs, from first call to live software, usually in weeks rather than months.
- 01Phase 1Free intake
Understand & analyse
Everything starts with a good conversation. We map your goals, processes and the bottlenecks worth solving: no sales pitch, just an honest read on where the biggest win sits.
- 02Phase 2Free blueprint
Blueprint & quote
We turn the analysis into a blueprint: a clear plan showing exactly which steps we'll take and why, paired with one fixed quote. You know up front precisely what we build, what it costs and when it's done, so the bill can't surprise you afterwards. And that blueprint is free and without obligation.
- 03Phase 3Prototype in days
Build, test & deploy
Then we build, in short iterations. You see a working prototype in days and a finished product in weeks. We work on a modern, AI-native and secure stack, with data protection and GDPR in mind from day one.
- 04Phase 4100% your code
Implement & optimise
We launch, hand over the full codebase and keep improving on your terms. You get 100% ownership of the code we write. Hosting and maintenance are optional.
What you always get
Fixed price
Agreed up front.
100% code ownership
Your code, fully yours.
Live in weeks
Prototypes in days, finished in weeks.
Modern & secure
A scalable stack that always integrates with the latest tech. Secured by our in-house cybersecurity experts.
Tools & tech
We build on the tech that fits you
We build on the technology that fits you best. If you already work with a certain stack (.NET, PHP or something else), we simply build on it. Starting fresh? Then we draw on years of experience to pick the technology that's strongest for your situation. You only migrate when it gains you something.
- Webshop on a scalable platform (Shopify, headless or custom)
- Marketplace integrations (bol.com / Amazon)
- Payment and warehouse / WMS integrations
- KPI dashboard with channel split and alert centre
- Data pipelines with validation, deduplication and source-health monitoring
- 100% ownership of the full source code
Faster Delivery. Fixed price. Forever your code.
Traditional agencies make software feel risky. Topdevs makes the project clear before we build.
Frequently asked questions
Which platform do you pick: Shopify or custom?
It depends on where you are. For most shops Shopify is the fastest and cheapest start, and it scales a long way. Need special logic, a custom checkout or heavy integrations? Then we go headless or build custom on top of a commerce engine. We choose based on your volume and your roadmap.
Can you integrate with bol.com and Amazon?
Yes. We connect marketplaces like bol.com and Amazon through their APIs, so orders, stock and fees land in one place. All channels come together in one dashboard, with monitoring that warns you when a feed stops.
What does ecommerce development cost?
We work with a fixed price agreed up front. The price depends on the platform, the number of integrations (marketplaces, payment, warehouse) and whether you want the numbers behind it automated too. After a short talk about your situation we give you a concrete figure, not a vague hourly rate that can go any direction.
Will the webshop grow with me as I sell more?
That's what we build for. We pick a platform that scales and keep the integrations stable with validation, retry logic and source-health monitoring. Orders, refunds, fees and stock are processed continuously, even as volume climbs. Your shop won't choke at your first peak.
Do you also connect my payment provider and warehouse?
Yes, that's a core part. We plug your payment provider and your warehouse or WMS into the shop, with validation and retry logic so a missed payment status or stock that won't sync doesn't slip past unnoticed. Monitoring of every source tells you when an integration stops, before a customer does.
Who owns the webshop once it's done?
You do. You get 100% ownership of the source code and no hidden dependency on us. You can carry on yourself, bring in another party or stay with us, that's your choice and not something the build locks you into.
Contact
Ready to build?
Send us a message or book a call straight away. We're happy to think through the best approach with you.
