Custom Shopify Apps: Build What Your Store Actually Needs

We develop powerful, scalable Shopify apps that extend your store’s functionality, streamline operations, and solve problems no off-the-shelf tool can.

  • Tired of Hacking Together Workarounds That Don't Scale?

    You’ve outgrown the app store. The features you really need? They don’t exist—or worse, require duct-taping together three clunky tools and a prayer.

    Maybe you’re stuck manually transferring data. Maybe you’ve been burned by agencies that overpromised and underdelivered. Or maybe you just need an app that fits your unique workflow like a glove—not someone else’s template.

    The truth? Shopify is built for the 80%.
    We build for the 20% who want to go further.

  • We Build Custom Shopify Apps That Do Exactly What You Need—No More, No Less.

    At FireNet Designs, we craft powerful, backend-first Shopify apps that automate your business, enhance customer experience, and unlock features Shopify forgot.

    Whether it’s syncing systems, automating operations, or building internal tools your team will actually use—we’re the team people call after the agency failed.

    What We Can Build:

    • Custom Admin Tools: Automate reporting, workflows, CSV exports & more
    • App Blocks & Theme Extensions: Power up your product pages with custom features
    • NFC / QR Code / API Integrations: Bridge physical and digital experiences
    • Shopify Checkout (Plus) Extensions: Customize checkout flows and customer logic
    • Backend Systems & Databases: Custom logic, voting systems, fulfillment tools—you name it

    Without Agency Bloat: No fluff, no middlemen, no vague timelines.
    Without Technical Debt: Built clean, scalable, and easy to maintain.

    Starter

    Get the foundation.

    Starting At:
    Starting At:
    $
    3500
    / month
    / month

    Ideal for merchants needing simple utility apps that live in the Shopify Admin and extend core store functionality.

    What's Included:

    • 1 UX Page in Admin
    • Basic App Scaffold (authentication, authorization, secure architecture)
    • 1–2 backend functions (Admin-only, no storefront access)
    • Admin API usage only (no storefront interaction)
    • 1 round of revisions
    • Initial QA Testing

    What You Can Build:

    • Internal admin tools
    • CSV transformers or data automation tools
    • Lightweight integrations with other back-office tools

    No theme code injections or storefront interaction

    Growth

    Solve real pain.

    Starting At:
    Starting At:
    $
    12000
    / month
    / month

    Built for brands needing an app that interacts with both the Shopify Admin and the storefront—without going full tilt into a custom product.

    What's Included:

    • Up to 3 Admin UX Pages
    • 2–4 Backend Functions
    • App Blocks or 1 Theme Injection
    • Admin API + optional storefront API usage
    • 2 rounds of revisions
    • Extended functionality (multi-step workflows, data lookups, sync logic)
    • Initial QA Testing

    What You Can Build:

    • Multi-functional tools that connect different Shopify apps
    • Custom forms, metafield editors, automation tools, etc.
    • Dashboard apps for managers or fulfillment teams

    Includes light frontend components with tight store integration

    Performance

    We’ll build whatever the f*ck you need.

    Starting At:
    Starting At:
    $
    38000
    / month
    / month

    For serious businesses with big ideas, complex logic, or public-facing apps that need enterprise-level polish.

    What's Included:

    • Unlimited UX Pages (Admin + optional public interfaces)
    • Complex Logic & Custom Workflows
    • Multiple Theme Injections or App Blocks
    • Advanced API & Third-Party Integrations (ERP, CRM, external APIs)
    • Custom App Hosting Architecture & DevOps Setup
    • Ongoing Maintenance Included (90 days)
    • Up to 3 rounds of revisions
    • Built to scale, with documentation & handoff training

    What You Can Build:

    • Public Shopify Apps
    • Wholesale/B2B Logic Apps
    • Payout, fulfillment, shipping, or logistics solutions
    • Full backend systems built around Shopify’s core data

    Think like an in-house dev team—but faster, focused, and already Shopify fluent.

    Starter

    Get the foundation.

    Starting At:
    Starting At:
    3500
    / month
    / month

    Ideal for merchants needing simple utility apps that live in the Shopify Admin and extend core store functionality.

    What's Included:

    • 1 UX Page in Admin
    • Basic App Scaffold (authentication, authorization, secure architecture)
    • 1–2 backend functions (Admin-only, no storefront access)
    • Admin API usage only (no storefront interaction)
    • 1 round of revisions
    • Initial QA Testing

    What You Can Build:

    • Internal admin tools
    • CSV transformers or data automation tools
    • Lightweight integrations with other back-office tools

    No theme code injections or storefront interaction

    Growth

    Solve real pain.

    Starting At:
    Starting At:
    12000
    / month
    / month

    Built for brands needing an app that interacts with both the Shopify Admin and the storefront—without going full tilt into a custom product.

    What's Included:

    • Up to 3 Admin UX Pages
    • 2–4 Backend Functions
    • App Blocks or 1 Theme Injection
    • Admin API + optional storefront API usage
    • 2 rounds of revisions
    • Extended functionality (multi-step workflows, data lookups, sync logic)
    • Initial QA Testing

    What You Can Build:

    • Multi-functional tools that connect different Shopify apps
    • Custom forms, metafield editors, automation tools, etc.
    • Dashboard apps for managers or fulfillment teams

    Includes light frontend components with tight store integration

    Performance

    We’ll build whatever the f*ck you need.

    Starting At:
    Starting At:
    38000
    / month
    / month

    For serious businesses with big ideas, complex logic, or public-facing apps that need enterprise-level polish.

    What's Included:

    • Unlimited UX Pages (Admin + optional public interfaces)
    • Complex Logic & Custom Workflows
    • Multiple Theme Injections or App Blocks
    • Advanced API & Third-Party Integrations (ERP, CRM, external APIs)
    • Custom App Hosting Architecture & DevOps Setup
    • Ongoing Maintenance Included (90 days)
    • Up to 3 rounds of revisions
    • Built to scale, with documentation & handoff training

    What You Can Build:

    • Public Shopify Apps
    • Wholesale/B2B Logic Apps
    • Payout, fulfillment, shipping, or logistics solutions
    • Full backend systems built around Shopify’s core data

    Think like an in-house dev team—but faster, focused, and already Shopify fluent.

  • From “Impossible” to Launched—Apps That Actually Work for You

    • Save Time & Automate the Grind
      Cut hours of manual work with automations tailored to your business.
    • Get Exactly What You Need
      Stop compromising. We build tools that match your systems—not the other way around.
    • Elevate Your Customer Experience
      Create magic moments your customers remember—with seamless, branded UX.
    • Improve Operations, Fast
      Whether it's finance, logistics, fulfillment or marketing—custom apps fix your bottlenecks.
    • Build Once. Scale Forever.
      Our apps grow with your store. No rebuilding required.
  • You Shouldn’t Have to Settle for Apps That Almost Work.

    • Off-the-Shelf Apps That Don’t Fit
      We build the exact tool you need—without the 10 features you don’t.
    • Endless Manual Processes
      From finance to operations, our automations replace repetitive tasks with one-click flows.
    • “We Can’t Build That” Agencies
      If others told you it can’t be done, it’s probably time to talk to us.
    • Scope Creep & Missed Deadlines
      You’ll know exactly what’s being built, when it’s coming, and what it’s for.

  • We Don’t Just Code—We Solve Business Problems

    From scoping to launch, every line of code is designed to eliminate friction and deliver results.

    You don’t need to be a tech expert to run a successful store. That’s where we come in. We learn your business and goals, then set up everything—apps, design tweaks, custom features—so your store runs exactly how you need it to.

    Feature Highlights:

    Custom Admin Dashboards & Tools Icon

    Custom Admin Dashboards & Tools

    Tailored functionality for your team—not the generic Shopify user.

    App Blocks & Theme Extensions Icon

    App Blocks & Theme Extensions

    Seamlessly inject new features into your storefront.

    Secure Hosting & Maintenance Icon

    Secure Hosting & Maintenance

    Apps are built to scale—and monitored for performance.

    Documentation & Training Icon

    Documentation & Training

    You get clean handoff, clear guides, and support if needed.

    Custom Admin Dashboards & Tools Icon

    Custom Admin Dashboards & Tools

    Tailored functionality for your team—not the generic Shopify user.

    App Blocks & Theme Extensions Icon

    App Blocks & Theme Extensions

    Seamlessly inject new features into your storefront.

    Secure Hosting & Maintenance Icon

    Secure Hosting & Maintenance

    Apps are built to scale—and monitored for performance.

    Documentation & Training Icon

    Documentation & Training

    You get clean handoff, clear guides, and support if needed.

  • From Idea to NFC-Integrated Reality—How We Helped Follow Your Legend Lead with Tech

    Client: Kevin McRoary, Shopify Plus Brand

    Follow Your Legend came to us after struggling to connect their new apparel line with their brand’s mission. They needed a way to bridge the physical (NFC-enabled apparel) with the digital (a voting platform, charitable impact, and app engagement).

    We built them a fully custom Shopify app that:

    • Enabled customers to vote on charities with a tap (via NFC)
    • Integrated directly with their Shopify backend for product and inventory sync
    • Handled vote tracking, donation calculation, and reporting
    • Prompted app installs & increased digital engagement
    • Created a seamless user experience from product to purpose

    The Results:

    • 80% of sessions included a submitted vote
    • 30% of users downloaded the app after interacting
    • 700+ votes in the first quarter
    • 2,500+ campaign products sold
    • And a deeper emotional connection between product, purpose, and brand.
    See If We Can Build Yours
  • Here’s How It Goes Down

    Steps:

    1

    Tell Us Your Vision

    You explain what you need, where the gaps are, and what success looks like.

    2

    We Scope It, Build It, Launch It

    We break the build into clear phases—starting with secure setup, functionality, then UX.

    3

    You Use It. Or Better Yet—Forget It Exists.

    Because it just works. Like magic. And if it ever doesn’t? We’re one call away.

    1

    Tell Us Your Vision

    You explain what you need, where the gaps are, and what success looks like.

    2

    We Scope It, Build It, Launch It

    We break the build into clear phases—starting with secure setup, functionality, then UX.

    3

    You Use It. Or Better Yet—Forget It Exists.

    Because it just works. Like magic. And if it ever doesn’t? We’re one call away.

    Book a Discovery Call
  • Meet the Team Behind the Results

    When yu work with FireNet, you're not passed off to some junior PM or left guessing who's doing the work. Yu'll work directly with our lean, high-skilled team—each one a specialist in their lane, focused entirely on your success.

    Justin Schellenberg
    Lead Developer & Founder of FireNet Designs

    Code Ninja. Builder. Project-Slayer.

    The engine behind your build. Justin leads every project hands-on—writing code, solving problems, and keeping everything moving fast and clean.

    Cole Denslow
    Technical Architect at FireNet Designs

    The Mind Behind the Machine

    The mastermind behind our systems. Cole designs scalable, bulletproof tech architecture—bringing deep stability to even the most complex builds.

    Michal Zarnowski
    Founder of Uptocode & FireNet's Full-Stack Powerhouse

    One Dev. Four Brains. Zero Bullsht.*

    For complex builds, Michal’s the guy. A full-stack machine who handles the hardest tech challenges—fast, deep, and with zero excuses.

    Elena Goren
    Senior QA Specialist at FireNet Designs

    Bug Slayer. Code Guardian. Midnight Debugger.

    Our in-house bug slayer. Elena makes sure your project launches smooth, clean, and crash-free—she breaks it before your customers ever can.

Starter

Get the foundation.

Starting At:
Starting At:
$
3500
/ month
/ month

Ideal for merchants needing simple utility apps that live in the Shopify Admin and extend core store functionality.

What's Included:

  • 1 UX Page in Admin
  • Basic App Scaffold (authentication, authorization, secure architecture)
  • 1–2 backend functions (Admin-only, no storefront access)
  • Admin API usage only (no storefront interaction)
  • 1 round of revisions
  • Initial QA Testing

What You Can Build:

  • Internal admin tools
  • CSV transformers or data automation tools
  • Lightweight integrations with other back-office tools

No theme code injections or storefront interaction

Growth

Solve real pain.

Starting At:
Starting At:
$
12000
/ month
/ month

Built for brands needing an app that interacts with both the Shopify Admin and the storefront—without going full tilt into a custom product.

What's Included:

  • Up to 3 Admin UX Pages
  • 2–4 Backend Functions
  • App Blocks or 1 Theme Injection
  • Admin API + optional storefront API usage
  • 2 rounds of revisions
  • Extended functionality (multi-step workflows, data lookups, sync logic)
  • Initial QA Testing

What You Can Build:

  • Multi-functional tools that connect different Shopify apps
  • Custom forms, metafield editors, automation tools, etc.
  • Dashboard apps for managers or fulfillment teams

Includes light frontend components with tight store integration

Performance

We’ll build whatever the f*ck you need.

Starting At:
Starting At:
$
38000
/ month
/ month

For serious businesses with big ideas, complex logic, or public-facing apps that need enterprise-level polish.

What's Included:

  • Unlimited UX Pages (Admin + optional public interfaces)
  • Complex Logic & Custom Workflows
  • Multiple Theme Injections or App Blocks
  • Advanced API & Third-Party Integrations (ERP, CRM, external APIs)
  • Custom App Hosting Architecture & DevOps Setup
  • Ongoing Maintenance Included (90 days)
  • Up to 3 rounds of revisions
  • Built to scale, with documentation & handoff training

What You Can Build:

  • Public Shopify Apps
  • Wholesale/B2B Logic Apps
  • Payout, fulfillment, shipping, or logistics solutions
  • Full backend systems built around Shopify’s core data

Think like an in-house dev team—but faster, focused, and already Shopify fluent.

Starter

Get the foundation.

Starting At:
Starting At:
$
3500
/ month
/ month

Ideal for merchants needing simple utility apps that live in the Shopify Admin and extend core store functionality.

What's Included:

  • 1 UX Page in Admin
  • Basic App Scaffold (authentication, authorization, secure architecture)
  • 1–2 backend functions (Admin-only, no storefront access)
  • Admin API usage only (no storefront interaction)
  • 1 round of revisions
  • Initial QA Testing

What You Can Build:

  • Internal admin tools
  • CSV transformers or data automation tools
  • Lightweight integrations with other back-office tools

No theme code injections or storefront interaction

Growth

Solve real pain.

Starting At:
Starting At:
$
12000
/ month
/ month

Built for brands needing an app that interacts with both the Shopify Admin and the storefront—without going full tilt into a custom product.

What's Included:

  • Up to 3 Admin UX Pages
  • 2–4 Backend Functions
  • App Blocks or 1 Theme Injection
  • Admin API + optional storefront API usage
  • 2 rounds of revisions
  • Extended functionality (multi-step workflows, data lookups, sync logic)
  • Initial QA Testing

What You Can Build:

  • Multi-functional tools that connect different Shopify apps
  • Custom forms, metafield editors, automation tools, etc.
  • Dashboard apps for managers or fulfillment teams

Includes light frontend components with tight store integration

Performance

We’ll build whatever the f*ck you need.

Starting At:
Starting At:
$
38000
/ month
/ month

For serious businesses with big ideas, complex logic, or public-facing apps that need enterprise-level polish.

What's Included:

  • Unlimited UX Pages (Admin + optional public interfaces)
  • Complex Logic & Custom Workflows
  • Multiple Theme Injections or App Blocks
  • Advanced API & Third-Party Integrations (ERP, CRM, external APIs)
  • Custom App Hosting Architecture & DevOps Setup
  • Ongoing Maintenance Included (90 days)
  • Up to 3 rounds of revisions
  • Built to scale, with documentation & handoff training

What You Can Build:

  • Public Shopify Apps
  • Wholesale/B2B Logic Apps
  • Payout, fulfillment, shipping, or logistics solutions
  • Full backend systems built around Shopify’s core data

Think like an in-house dev team—but faster, focused, and already Shopify fluent.

Your App Isn’t Going to Build Itself—Let’s Talk

We don’t work with just anyone—we only take on a few custom builds per quarter to keep quality high and timelines tight. If you’ve got a serious need and a clear idea (or want help shaping it), we should talk.

Book Your Free App Consultation Today