01 — Specification
Approved specification
Goals, non-goals and testable acceptance criteria — in writing, in a version 1.0 approved by you.
Shopify · Spec-Driven Development · Spec Sprint
Specification first, then the shop.
Most projects don't fail because of code, but because of unclear requirements and wishes that change along the way. In the Spec Sprint we define together exactly what gets built — in writing, testable and approved by you. Afterwards everyone knows what they get and what it costs.
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What you get
A finished result with value of its own — as a page in your Confluence or as a PDF. The specification is yours and can be implemented by anyone.
02 — Estimate
Effort estimate per work package
Every work package with its effort in hours. You see what the project costs before implementation starts, and where scope can be saved.
03 — Issues
Issue list for implementation
The specification broken down into issues with acceptance criteria — the basis for implementation, by me or by anyone else.
How it works
Five steps from the first conversation to acceptance — the specification is done after step three and belongs to you.
- Step 01
Conversation
You describe the project, goals and constraints; I ask the questions that would get expensive later.
in the sprint - Step 02
Spec draft with open questions
I write the first draft with goals, non-goals, acceptance criteria and a list of open questions.
from €570 - Step 03
Clarification and approval of version 1.0
Open questions are resolved together, then you approve version 1.0 — with effort estimate and issue list.
included - Step 04
Implementation as a package or by effort
Based on the specification: a package or billed by effort, by me or by anyone else.
by scope - Step 05
Acceptance against the acceptance criteria
Acceptance is checked against the criteria in the specification — not against memories of conversations.
included
Sizes and prices
Three sizes, one hourly rate. Which one fits, we'll settle in the intro call.
- Size S
One feature or one section
One clearly outlined requirement, for example a new section, a set of checkout rules or a small automation.
€570 - Size M
Several features or one integration
Several related features or a connection to ERP, PIM or a payment provider.
€1,140 - Size L
Relaunch, migration or new app
A project with many stakeholders and dependencies — relaunch, platform migration or an app of your own.
from €2,090
Payment before the start. If you book the implementation with me, 50 % of the Spec Sprint is credited against it. All prices net.
Book an intro call Not sure which step fits? That's exactly what the call is for — 25 minutes, free of charge. Afterwards we'll both know whether it's a match.
Changes after approval
New wishes are welcome. They are assessed as a change request with effort and date and, once you approve, added to a new version of the specification. That keeps it clear what has been commissioned.
Openly documented
My process is open: phases, approval points and templates are published on GitHub.
Frequently asked questions
What if I don't implement with you afterwards?
You still have a finished result: the specification is yours, and any agency or developer can implement it.
Do I need an audit first?
Only for an existing shop with an unclear starting point. Otherwise we start directly with the Spec Sprint.
Why payment up front?
The Spec Sprint is a finished result with value of its own — you get a specification you can use independently of me.
Trusted by
I write the specification first, then the code.
25 minutes, free of charge. Afterwards you'll know whether I'm the right fit — and what the next sensible step would be.
- In the Shopify ecosystem since 2019
- 50+ delivered projects
- Process published on GitHub
- Specification free to reuse