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Ecommerce Services
Modern commerce — engineered for speed, search, conversion and data.
We build on the platform that gives your business the biggest edge, then engineer it to perform: sub-second pages, SEO in the architecture, a checkout tuned for conversion, and every interaction feeding your data.
Sentry's Ecommerce service builds and manages stores on Shopify, WooCommerce, BigCommerce, Magento or a fully headless stack — chosen against your margin model rather than our preference — and engineers them for sub-second pages, search and checkout conversion.
What Ecommerce Services delivers
The right platform
Shopify, WooCommerce, BigCommerce or Magento — matched to your model, not sold to you.
Composable when it counts
Headless storefronts in Astro or Next.js over any commerce engine for maximum speed and design freedom.
Built to convert
Performance, search and experience engineered to compound — without quietly draining margin into fees.
Representative stack
Shopify
WooCommerce
Magento
BigCommerce
Next.jsKPIs we move — measured, owned, reported
Every KPI is tied to a named owner and a target agreed up front — so this service is accountable to outcomes, not activity, for every stakeholder who consumes the value.
Capability Maturity — we walk you up the five levels
Operated at Level 5 · Optimising — self-improving, measured and owned. We track this rank and raise it over time. See the five levels →
Five ways to sell — matched to your model
Shopify
Hosted SaaSThe fastest route to live in commerce. Hosting, payments and checkout are fully managed — minimal ops to carry — and we engineer it to convert.
Best for · DTC brands moving fast WooCommerce
WordPress · open sourceCommerce inside WordPress — total control and no licence fees, with the upkeep owned and managed by us.
Best for · Content-led stores on WordPress BigCommerce
Hosted · no transaction feesHosted like Shopify but open by API, with no transaction fees and strong B2B built in — engineered for scale.
Best for · Scaling & B2B catalogues Magento
Adobe Commerce · enterpriseOpen-source enterprise commerce — deep customisation for complex catalogues and large operations, built and managed to perform.
Best for · Complex, high-volume retail
Headless Commerce
ComposableAny front end over any commerce engine — a custom storefront in Astro or Next.js, content in Sanity, your commerce engine over API. Sub-second, edge-served, with total design freedom.
Best for · Performance & bespoke UXWhy this matters
Functional value, value-stream value — and why it can't be ignored.
Engineers modern storefronts for speed, search, conversion and data — edge-served, composable and measured end to end.
The point of exchange where the value stream is realised as revenue: marginal gains in speed and conversion here multiply across every order and compound the data that improves everything upstream.
In commerce, milliseconds are money — slow, generic stores haemorrhage conversion to faster rivals on every visit. The loss is invisible per session and brutal at scale: orders you already paid to acquire, walking away.
Going headless — when performance & experience are the edge
Composable storefront.
A custom front end in Astro or Next.js, content in Sanity, and your commerce engine plugged in over API — sub-second pages, edge-served, with total design freedom.
Sanity + CommerceContent + catalogue APIAstro / Next.jsStorefront build
CloudflareEdge + R2One data layer · measured & owned
Every service creates data — captured, measured, owned.
Ecommerce Services doesn’t just run — it generates signal. We land that data in one warehouse and turn it into live KPIs tied to a named owner, so performance is attributable and acted on, never trapped inside a single tool.
Data warehouse
Supabase
Snowflake
Keboola
BigQuery KPIs, dashboards & apps
Plotly
Retool
Apache Superset Platform-agnostic — we connect what you already use and add a warehouse only where it earns its place.
How we select technology
We choose technology last — for the outcomes it has to earn.
Never tech for its own sake. A tool joins the stack only where it measurably protects value, cuts cost or unlocks speed — fit to a designed system, owned where it counts, and measurable from day one. How we select technology →
Speed
Modern, edge-served stacks are sub-second. Slow surfaces cost conversion and SEO every single day.
Cost
Cut licence, hosting and per-task SaaS fees — pay for capability, not lock-in or idle enterprise tiers.
Security
Flat, edge architecture with almost nothing left to attack — fewer moving parts, smaller surface.
Ownership & no lock-in
Composable and self-hosted where it counts — you own the system, not rent someone else’s.
Measurability
Clean data and KPIs baked in — you cannot improve, automate or apply AI to what you cannot measure.
Fit to process
The right tool for a designed system — selected against process readiness, so it amplifies, not adds friction.
How we deliver · DMAIC
Every Ecommerce Services engagement runs on DMAIC.
Define the goal and its value, measure the baseline, analyse the real constraint, improve with a proven build, then control the gains — so results are predictable, repeatable and defensible, not down to luck.
Agree the goal, value, budget & timescale up front.
Baseline the KPIs above — current state, not guesswork.
Diagnose the real constraint and the solution needed.
Build the chosen solution; prove the uplift.
Lock in the gains; monitor and sustain them.
FAQ
Common questions
Which ecommerce platform should we be on?
Whichever gives your business the biggest edge — Shopify, WooCommerce, BigCommerce, Magento, or a headless storefront in Astro or Next.js over any commerce engine. Sentry matches the platform to your margin model rather than selling the one it prefers to build on, because platform fees quietly compound against margin for years.
Why does store speed matter so much in ecommerce?
Because milliseconds are money. Slow, generic stores lose conversion to faster rivals on every visit, and the loss is invisible per session and brutal at scale — orders you already paid to acquire, walking away. Sentry engineers for sub-second pages because that is where recovered margin actually lives.
When is headless worth it for a store?
When speed and design freedom are worth more to you than the simplicity of an all-in-one platform. Sentry builds composable storefronts in Astro or Next.js over an existing commerce engine, so the shopfront gets edge performance while the commerce logic stays where your team already runs it.
Do you handle SEO for an ecommerce site, or is that separate?
It is built into the architecture rather than added afterwards. Search performance, page speed and the data layer are engineered as part of the build, so that every interaction feeds your data and the store is measurable end to end from the day it ships.
We are already on a platform. Do you have to rebuild the store?
Not by default. Sentry starts with a free Discovery session and a Financial Value Model to establish what your current store is actually producing and where margin is leaking. Rebuilding something that converts is a cost, not a strategy.
What does managed ecommerce cost?
Sentry's managed services start at £3,000 per month, scoped to the work and including selected tool costs. Across an engagement, investment is typically 3–5% of turnover to protect existing value, 5–8% to improve performance and 8–15% to create new growth, anchored to a value model agreed first.
Start here · the free first step
Ecommerce Services starts the same way every engagement does: with Discovery.
Two distinct moves — a free, no-obligation Discovery Session to find your value at stake, then the Discovery & Blueprint: 14 structured outputs — value model, roadmap and business case — before a pound of delivery is committed.
Engaged alone or as one engine