How fast can you ship an MVP?

21 calendar days from kickoff to production deploy on the 21-Day MVP path. Custom Software builds run 6 to 26 weeks depending on scope.

How much does an MVP cost?

21-Day MVP from $5,000 USD. Custom Software Development from $11,000. AI Development from $7,000. Final quote depends on scope and integration count.

What stack do you use?

Default stack: Next.js, TypeScript, Node.js, Python, PostgreSQL, AWS, Stripe, Clerk, OpenAI, Anthropic Claude.

What services does Parallel Loop offer?

Three service lines: 21-Day MVP Development (from $5,000), Custom Software Development (from $11,000), and AI Development and AI Agents (from $7,000). Within these, 11 specialised service pillars including mobile app development, ecommerce, automation, CRM integration, cloud DevOps, and enterprise solutions.

How is the 21-Day MVP different from Custom Software?

The 21-Day MVP is productised with fixed scope, fixed price, and fixed 21-day timeline. It fits single-workflow products with off-the-shelf integrations. Custom Software is bespoke, sprint-based, and runs 6 to 26 weeks for products with multiple workflows, regulated scope, or enterprise integrations.

What stacks do you support?

Default stack: Next.js, TypeScript, Node.js, Python, PostgreSQL, AWS, Stripe, Clerk, OpenAI, Anthropic Claude. We can work in Java, .NET, Go, Ruby, PHP, Swift, Kotlin where the existing landscape requires it.

Do you offer AI development separately?

Yes. AI Development and AI Agents is a separate service line covering chatbots, generative AI, machine learning, computer vision, NLP, and AI consultation. From $7,000 for a chatbot MVP up to $35,000+ for a custom AI platform.

What is included in pricing?

Working software, full source code, CI/CD pipeline, staging plus production environments, runbook, monitoring setup, dual on-call cover for 2 weeks post-launch. We do not charge separately for architecture, design, or QA. They are part of every engagement.

Can you handle compliance and security?

Yes. We build HIPAA, PCI DSS, SOC 2 Type II, GDPR, ISO 27001, NERC CIP, IEC 62443 architecture where the build requires it. We do not issue audit certificates. We build the architecture and evidence collection that supports your audit firm.

Do you offer maintenance after launch?

Yes. Maintenance retainer from $2,200 per month. On-call cover, dependency upgrades, small features, security patching. SLA-backed. We do not require a retainer to do a build; we offer it as an option.

How fast can you start?

Typically 2 to 4 weeks from scoping call to kickoff. We do not double-book the team.

What is the average engagement length?

21-Day MVP: 21 calendar days. Custom Software: 6 to 26 weeks. AI Development: 4 to 20 weeks. Maintenance retainers run month to month.

How do I know which service line fits?

Book the free 45-minute scoping call. 30 minutes on your build, 15 minutes on which path fits. We tell you at the call if your build does not fit our service lines.

Do you build to Built-for-Shopify standards?

Yes. The Built-for-Shopify badge requires performance, accessibility, security, and UX standards. We complete the checklist by default on public app builds. The badge typically lifts install rates and ranking in the App Store.

What stack do you use?

Remix with TypeScript as the default framework (Shopify's preferred stack since 2024). Polaris for admin UI. App Bridge for embedded admin. GraphQL Admin API for data. Prisma for app-side data. Hosted on Vercel, Render, or Shopify-managed hosting.

What about Shopify Plus?

Plus-only features supported: B2B, Shopify Markets, Shop Pay Installments, advanced reporting, Flow, Launchpad. Plus checkout customisation via Checkout UI extensions and Shopify Functions. Many of our merchant clients are on Plus.

Can you build Checkout UI extensions?

Yes. Checkout UI extensions for Shopify Plus stores: post-purchase upsells, custom fields, delivery options, custom payment integrations. Server-side logic via Shopify Functions.

How do you handle Shopify webhooks?

Webhooks for orders, products, customers, fulfillment, app uninstall. Signature verification on every webhook. Idempotency on processing. Background queue for heavy work. Retry handling for failed webhooks.

Can you migrate apps from Node.js + Express to Remix?

Yes. Most older Shopify apps are Node.js or Ruby on Rails. We migrate to Remix while preserving installations and data. Common reason: Built-for-Shopify badge requires modern performance that older stacks struggle with.

What about App Store submission?

Yes. App Store listing copy, screenshots, demo store, review feedback handled end to end. Average submit to live: 5 to 15 days depending on reviewer workload and feedback rounds.

Shopify API App Development

Shopify API App Development. Apps that pass App Store review the first time.

Public Shopify apps for the App Store and private Shopify apps for one merchant. Built with Polaris design system, App Bridge, GraphQL Admin API, Checkout UI extensions, and Shopify Functions. Shopify Plus features supported. App Store review handled. Shipped in 6 to 14 weeks. USD pricing.

Book a Free Call →See how we work ↗

Tell us the app type, target merchants, and revenue model. Scoped plan plus quote within 3 business days. No deposit to talk.

6–14WEEKS TO SHIP

$7K+SHOPIFY APP

PolarisAPP BRIDGE

BFSREADY

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How we work

Overview: Three phases from Shopify Partner registration to live in the App Store or installed in your merchant store.
Step 1 — Scope and architecture: Two weeks scoping. App type (public vs private), Shopify Plus dependencies, target merchant size, revenue model (free, subscription, usage-based). Built-for-Shopify checklist mapped.
Step 2 — Build in sprints: 4 to 10 weeks build. Remix-based app with TypeScript. Polaris UI. App Bridge. GraphQL Admin API primary, REST where needed. Webhooks for events. Shopify Functions for checkout logic where applicable.
Step 3 — Harden and launch: 1 to 2 weeks hardening plus App Store submission (public apps). Performance test under load. App Store screenshots and listing copy. Review feedback handled. Built-for-Shopify badge applied where the engagement targets it.

Recent ecommerce builds

Recent Shopify and ecommerce platform builds.

Back2cartShopify abandoned cart app

Public Shopify app for abandoned cart recovery with multi-channel notifications, lifecycle automation, and reporting.

Read case study →

Adorable BowsEcommerce growth platform

Shopify Plus storefront with custom theme, custom apps for inventory and lifecycle, and conversion-optimisation programme.

Read case study →

Indi LivingLifestyle ecommerce

Multi-channel lifestyle brand storefront on Shopify Plus with PIM integration and custom inventory apps.

Read case study →

Full library on the case studies page →

What we deliver. Shopify App

Public Shopify apps for the App Store

Multi-tenant Shopify app with OAuth installation flow, per-shop billing via Shopify Billing API, Polaris UI for admin surface, App Bridge for embedded admin experience. Built-for-Shopify checklist completed.

Private Shopify apps for one merchant

Single-merchant custom app installed directly in your store. Faster timeline because no App Store review. Common for custom workflows, ERP integration, internal tools.

GraphQL Admin API and webhooks

GraphQL Admin API primary (REST is being deprecated). Webhooks for orders, products, customers, fulfillment, app uninstall. Bulk operations for large data sync.

Checkout UI extensions and Shopify Functions

Checkout UI extensions for Shopify Plus checkout customisation (post-purchase upsells, custom fields, delivery options). Shopify Functions for discount, shipping, and payment customisation that runs server-side.

Shopify Plus features

Plus-only features: B2B, Shopify Markets, Shop Pay Installments, advanced reporting, Flow automation, Launchpad. Multi-store management for merchants with multiple Plus stores.

App Store submission and Built-for-Shopify

App Store listing, screenshots, demo store, review feedback handled. Built-for-Shopify checklist completed (performance, accessibility, security, UX) where the engagement targets the badge.

Typical engagement ranges

Single workflow

From $7,000

Private Shopify app or simple public app with one core workflow.
Best for solving one specific merchant problem or extending your own store.
6 to 8 weeks.

Multi-system automation

From $9,500

Shopify app integrating with ERP, CRM, warehouse, or accounting.
Public or private. Connects Shopify into the rest of your stack.
8 to 12 weeks.

Commerce platform build

From $21,000

Full SaaS product on Shopify ecosystem with App Store listing.
Built-for-Shopify badge, multi-tier pricing.
12 to 18 weeks.

Maintenance retainer

From $2,200 / mo

Shopify API updates, webhook monitoring, App Store policy changes, on-call cover.

Indicative USD ranges. Final quote depends on app type, integration count, and Plus scope. Exact scope and pricing locked on the scoping call.

FAQ

Public Shopify apps go to the App Store and can be installed by any Shopify merchant. They have multi-tenant requirements and pass through Shopify App Store review. Private (custom) apps are installed in one specific merchant store, skip the App Store review, and ship faster. We pick at scoping based on your goals.

Need Shopify app?

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Shopify API App Development. Apps that pass App Store review the first time.

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Who we've built for.

How we work

Recent ecommerce builds

What we deliver. Shopify App

Public Shopify apps for the App Store

Private Shopify apps for one merchant

GraphQL Admin API and webhooks

Checkout UI extensions and Shopify Functions

Shopify Plus features

App Store submission and Built-for-Shopify

Typical engagement ranges

Single workflow

Multi-system automation

Commerce platform build

Maintenance retainer

FAQ

Need Shopify app?