Testing Medusa: What to Test, What to Skip, and How
Commerce code moves money, so untested checkout logic is a liability. A pragmatic test strategy — what earns its keep, and what is theatre.
We build commerce that actually ships.
Eryx is a small studio of engineers and designers building production software for commerce, content, and ops teams.
Oemline
Fielder
Maple
SaySo
MarketHaus
360Training
Helio
[ 01 / Services ]
What we build
E-commerce
Medusa.js storefronts, B2B portals, custom checkout, multi-region.
→
Web applications
Next.js, React, TypeScript. SaaS dashboards, marketplaces, internal tools.
→
AI systems
Agents, RAG, OpenAI/Anthropic integrations, custom workflow tools.
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Admin & CMS
Sanity, Payload, custom dashboards. Where ops teams actually want to live.
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Plugins & modules
Open-source Medusa modules, integrations, payment & shipping providers.
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Design systems
Tokens, components, Figma libraries. Stop rebuilding the same button.
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[ 03 / Process ]
How we ship
Discover
1 week — scope, audit, plan
Design
2 wk — wireframes → hi-fi
Build
4–8 wk — sprints, weekly demos
Ship + iterate
ongoing — measure, improve
[ By the numbers ]
Five years, counting.
80+
5 yrs
24h
92%
[ FAQ ]
The questions we always get.
How quickly can you start?
Usually within two weeks. Discovery can often start sooner — it is one week of scoping and does not need the full team.
Who owns the code?
You do, from the first commit. We work in your repository, on your infrastructure, with your accounts.
Do you work with existing teams?
Often. The Embed engagement exists for exactly that — a senior squad in your standups, your tools, your roadmap.
What happens after launch?
Thirty days of on-call is bundled into every build. After that it is a retainer or a clean handover, your call.
[ 04 / Stack ] WE WORK WITH
MedusaNext.jsSanityTypeScriptReactPostgresTailwindNodeBunDocker
[ 05 / Testimonial ]
Eryx ships like a senior in-house team. Transparent code, weekly demos, no surprises — we doubled our time-to-market on the rebuild.
[ 06 / Pricing ]
Engagement models
Sprint
$2k–10k
A focused 2-week burst
- +One clear deliverable
- +Daily Loom updates
- +Code in your repo
- +Async-first
Build
$6k–18k
8–14 week engagement
- +Discovery + design + ship
- +Weekly demos
- +On-call after launch
- +Knowledge transfer
Embed
From $8-15k/mo
Senior team for 3+ months
- +Dedicated squad
- +Your tools, your standups
- +Roadmap ownership
- +Cancel any month
[ 07 / Field notes ]
From the team
Observability for Medusa: Logs, Traces and the Alerts Worth Having
Self-hosting means owning the question 'is checkout working?'. Structured logging, tracing, the four metrics that matter and alerts that do not cry wolf.
Caching Medusa: What to Cache, Where, and What Never To
Four cache layers, one rule about carts, and the invalidation strategy that stops a price change taking twelve hours to appear.