Services

Four ways to work together

Every engagement starts with a written scope. You know what you are getting, when, and for how much before any code is written.

Shopify app & storefront builds

Custom Shopify apps, checkout and post-purchase extensions, Hydrogen storefronts, and the integrations around them.

Best for
Shopify brands and app companies that need a senior builder, not a team to manage.
Shape
Fixed scope, billed by milestone

What you get

  • Architecture and a written scope before any code
  • The app or storefront, deployed to production
  • Integrations with Stripe, Klaviyo, Zendesk or your ad platforms
  • Handover docs, or ongoing support on a retainer

AI & automation sprints

A working agent, MCP server, Claude-powered pipeline or creative generator, wired into the tools you already run.

Best for
Performance agencies, ad-tech teams and operators with a repetitive process worth automating.
Shape
2–4 week sprint

What you get

  • One workflow automated end to end, with guardrails and review steps
  • Evaluation harness so you can see when it fails
  • Runbook and cost estimate for keeping it running

Fractional CTO

Architecture, code review, roadmap and vendor decisions, plus a sane cloud bill, for founders without a senior engineer in-house.

Best for
Founders taking an idea to a running product, or teams between technical leads.
Shape
Monthly retainer with set hours

What you get

  • Architecture and roadmap decisions in writing
  • Code and pull-request review
  • Hiring help: role definitions and technical interviews
  • Infrastructure and cost reviews

Audit & rescue

A code, infrastructure, performance and cost review of an existing product, with a prioritized written fix plan.

Best for
Teams with a slow, fragile or expensive product and no clear picture of why.
Shape
1–2 weeks, fixed fee

What you get

  • Findings backed by measurements, file paths and screenshots
  • A prioritized fix plan with effort estimates
  • Optional: I fix the top items myself

Not sure which fits?

Tell me what you are building. If I am not the right fit, I will say so and point you to someone who is.

Get in touchmario.massad@mx3.io