FirstEngineer

Service

Storefronts and the logic platforms don't cover

Platform defaults get you ninety percent of a store. We build the last ten — the custom checkout rule, the catalogue sync, the integration that connects the shop to everything else you run.

Typically 1–4 weeks
Ecommerce
Where platform defaults run out

01

Where platform defaults run out

Shopify and its peers get you ninety percent of a store, and the last ten percent is where the revenue actually leaks. Custom checkout rules, catalogue quirks, the integration nobody planned for. We build on top of the platform rather than fighting it, so you keep everything it already does well.

  • Storefront or custom checkout work
  • Catalogue and inventory sync
  • Integrations to fulfilment, ERP or CRM
  • Live launch with rollback plan
Checkout logic that fits your business

02

Checkout logic that fits your business

Bundles, conditional shipping, subscriptions, deposits, trade pricing — the rules you already operate but the platform has never heard of. Checkout is the one screen where money either arrives or does not, so it gets tested hardest and changed most carefully.

Catalogue and stock in step

03

Catalogue and stock in step

Products, pricing and inventory kept in sync with the systems behind the shop, so the storefront is never confidently wrong about what is available. Overselling costs more than a missed sale, because a missed sale costs an order and an oversell costs a customer.

Launched without holding your breath

04

Launched without holding your breath

Staged rollout with a rollback plan, because a broken checkout costs money by the minute and is rarely noticed immediately. Changes ship behind flags where it makes sense, and we watch the funnel after release instead of assuming it is fine.

How it runs

Same four steps, every project

  1. 01

    Scope

    A call, then a one-page scope: what gets built, what it costs, what date it lands, and what is explicitly not included.

  2. 02

    Build

    The core of the thing first, on your infrastructure from day one. A working demo every Friday, whether the week went well or not.

  3. 03

    Harden

    The parts everyone skips — empty states, errors, retries, analytics, and the case where a user does something strange.

  4. 04

    Ship

    Live, with monitoring and a handover doc. Two weeks of support included, then you take it or we stay on.

Pricing

What this usually costs

The exact number comes out of the scoping call. These are the shapes it takes.

Standard

Monthly · pause or cancel anytime

$2,000per month

One active build at a time, delivered in order. The plan most founders start on — enough to get a product live and keep it moving.

Priority

Monthly · pause or cancel anytime

$3,600per month

Two builds running in parallel and a faster turnaround, for when there is a launch date someone else already committed to.

Embedded

Monthly · 1 month minimum

from $7,500per month

Dedicated capacity that behaves like a team member — in your standups, on your roadmap, accountable for a slice of the product.

Other things we build

Tell us what you need built

Thirty minutes, free, no proposal. You leave with a scope, a number, and a date — or an honest reason why we’re not the right people.