Senior Shopify Engineering, AI-Accelerated

One Senior Engineer.
Direct Access. No Handoff Chain.

You talk directly to the person writing the code. No project managers, no ticket queues, no junior devs learning on your checkout. Senior commerce engineering for the systems tied to your revenue — shipped in days, not quarters.

Get Your Free 20-Minute Velocity Audit →See Our Sprints

1 person

Direct to the Engineer

14-day

Average Sprint Delivery

9+

Years Senior E-Commerce Experience

What We Build

Engineering for the systems tied to your revenue

Every engagement is led by senior engineers who've built and shipped at scale - now accelerated with cutting-edge AI development workflows.

01

Revenue-Critical Storefronts

Checkout, storefront performance, and conversion UX — the surfaces where a bad deploy costs real money.

  • Custom themes, sections, and UX flows for Shopify and Shopify Plus
  • Headless storefronts (Next.js, Hydrogen, Remix) wired to your existing stack
  • Performance optimization for Core Web Vitals, mobile speed, and conversion rate
02

Structured CRO Testing

3 tests, 4 weeks, measured results. We identify the highest-leverage conversion gaps, implement the experiments, and report the revenue impact.

  • Store audit to identify highest-leverage conversion opportunities
  • A/B tests across PDP, cart, and checkout with full statistical rigor
  • Results report with annualized revenue impact for every winning variant
03

Custom Integrations & Internal Tools

Connect the tools that run your brand so work flows instead of stalls.

  • 3PL, subscriptions, loyalty, and ERP integrations
  • Internal dashboards for ops, merchandising, and CX teams
  • Event-driven automations that cut manual work from your processes
04

Migrations & Re-Platforms

Big moves without the 12-month agency timeline.

  • Shopify / Shopify Plus migrations with zero-drama launches
  • Rebuilds from legacy platforms and brittle custom stacks
  • Step-by-step rollout plans to de-risk SEO, data, and operations
05

Ongoing Velocity Sprints

A flexible way to keep shipping without hiring a full team.

  • 1–4 week development sprints focused on a single revenue goal
  • Backlog triage and prioritization with your in-house team
  • Clear outcomes, fixed timelines, and async-first collaboration

One senior engineer. Direct access. AI-accelerated delivery that makes traditional agency timelines look like a rounding error.

Value Sprints

Outcome-based sprints, not open-ended retainers

Every engagement is scoped around a specific revenue outcome. Pick a sprint, get results.

Build

The Dev Sprint

1-4 Weeks

Custom Shopify development scoped to a single outcome. Features, integrations, migrations, or performance work.

  • Custom theme builds, sections, and checkout extensions
  • App integrations (3PL, subscriptions, ERP, loyalty)
  • Headless storefronts (Next.js, Hydrogen)
  • Performance optimization and Core Web Vitals
From $2,500
Scope a Dev Sprint →
Ongoing

Fractional CTO

Monthly

Continuous senior engineering support. Roadmap prioritization, architecture decisions, and sprint-based delivery.

  • Ongoing sprint-based development
  • AI-automation of internal workflows
  • Senior architectural oversight and code review
  • Direct Slack/async access to your engineer
From $5,000/mo
Explore Fractional CTO →
How We Work

Direct access to a senior engineer, start to finish

No account managers. No ticket queues. You message the person writing the code. That is the entire process.

STEP 01

20-Min Audit Call

We walk through your store, stack, and goals together. You talk directly to the engineer who will do the work. No sales team, no handoff.

Day 1
STEP 02

Scope & Sprint Plan

You get a fixed-scope proposal with clear deliverables, timeline, and price. No ambiguity, no open-ended retainers.

Day 2-3
STEP 03

AI-Accelerated Build

Senior-led, AI-augmented engineering delivering weeks of traditional agency work in days. You get async updates and can ping directly anytime.

1-4 weeks
STEP 04

Ship & Measure

Staged deployment with monitoring. For CRO work, you get a full results report with revenue impact. We stick around until results are verified.

Ongoing
Recent Work

Client results across Shopify builds and conversion optimization

Beauty / DTC

Shopify Plus migration with complex subscription and bundling logic

What we did

Full platform migration for a mid-market DTC beauty brand. Custom theme architecture, checkout extensions for subscription upsell flows, Shopify Functions for bundle and gift-with-purchase discount logic, and Storefront API integration for a headless product configurator.

Result

Completed in 18 weeks. 22% lift in checkout completion rate. Subscription attach rate up from 8% to 14%.

Fashion / Multi-Region

Checkout and performance overhaul across US, UK, and EU storefronts

What we did

Custom checkout extensions for region-specific payment flows and currency handling. Shopify Functions for automated discount logic that scaled through flash sale volume. Theme performance optimization that cut LCP from 4.2s to 1.8s. Storefront API build for dynamic collection pages with real-time inventory.

Result

57% faster checkout page load. Flash sale revenue up 31% YoY with zero discount logic failures. EU checkout conversion improved 12%.

Wellness / CRO

Structured A/B testing program to fix below-benchmark conversion rates

What we did

Built and ran a testing framework across PDP and checkout flows: add-to-cart placement, trust signals, shipping thresholds, cart drawer vs. cart page, and cross-sell positioning. Three rounds over 8 weeks with full statistical rigor. Delivered roadmap and built all winning variants.

Result

18% lift in PDP-to-checkout conversion. $420K in annualized revenue identified from shipping threshold optimization alone.

Our Approach

The person you talk to is the person writing the code

Most agencies sell you a PM who relays your requests to a junior developer you never meet. Marketplaces give you cheap hours with no architectural oversight. Neither model is built for speed or accountability.

Here, you get direct access to 9+ years of senior e-commerce engineering, augmented by AI workflows that compress timelines without cutting corners.

Faster feature delivery vs. traditional agency timelines, across checkout customizations, subscription flows, and analytics integrations.
$0 → Live
Full-stack internal tools - Slack bots, Jira integrations, automated standup workflows - built and deployed in days, not sprints.
“Incredibly versatile - consistently delivered high-quality work and took on the most challenging projects. It was truly a pleasure working with Will.”
Harobe S.
Digital Marketing & Program Manager | Subscription Growth & Omnichannel Retail
Why We Exist

The agency model is broken. You pay for a team of 8, but the senior engineer touches your project for 2 hours a week. The rest is coordination overhead, junior developers, and status meetings that exist because nobody trusts the process.

AI has changed the math. One senior engineer with the right AI workflows can now ship what used to take a team of four. The bottleneck is no longer velocity — it's judgment. Does the person touching your checkout, your subscriptions, your analytics actually understand the revenue consequences of what they're shipping?

I spent years inside high-growth DTC environments watching how slow, fragile delivery kills good ideas. Velocity Dev Labs exists to give operators a faster option: direct access to senior engineering, AI-accelerated execution, and fixed-scope pricing that ties to outcomes.

No layers. No handoffs. Just fast, senior-led engineering for brands that need to move at the speed their business demands.

Traditional Agency
  • Talk to a PM, not the engineer
  • 6-8 week lead times
  • $15-25k monthly retainers
  • Junior devs, senior prices
Marketplace Freelancer
  • Cheap hourly, unpredictable quality
  • No architectural oversight
  • You manage the project
  • Disappears after delivery
Velocity Dev Labs
  • Direct access to a senior engineer
  • 1-2 week fixed-scope sprints
  • AI-accelerated, senior-led execution
  • Fixed price, revenue-risk aware, measured results
Shopify PlusLiquidNext.jsHydrogenReactTypeScriptNode.jsVercelClaude Code
Let's Build

Book your Velocity Audit

I'll map out your 30-day roadmap - no pitch, just the plan.

Get Your Free 20-Minute Velocity Audit →

will@velocitydevlabs.com — or just email me directly.