NATIVE EXTENSIBILITY
Shopify Functions (Rust / WASM)
Custom discount logic, payment method reordering, shipping delivery rules, and cart transformations running natively in under 5ms.
use shopify_function::prelude::*;
#[shopify_function_target(first_party = "run")]
fn run(input: input::ResponseData) -> Result<FunctionResult> {
let discounts = calculate_tiered_pricing(&input.cart);
Ok(FunctionResult { discounts, targets: vec![] })
}
#[shopify_function_target(first_party = "run")]
fn run(input: input::ResponseData) -> Result<FunctionResult> {
let discounts = calculate_tiered_pricing(&input.cart);
Ok(FunctionResult { discounts, targets: vec![] })
}
Target WASMwasm32-wasi • 18kb
Execution Time2.1ms (<5ms SLA)
Polaris 12App Bridge 3.0 Native
<3ms
WASM Exec Speed
0
Server Infra Cost
100%
Bug-Free Logic SLA
01
Native WASM Runtime
Zero third-party servers. Runs directly inside checkout edge infrastructure.
02
App Bridge 3.0
Native embedded Polaris interface for seamless merchant store administration.
03
Automated CI/CD
Full GitHub Actions pipelines with automated staging and version control.
✨
BESPOKE RUNTIMES & NATIVE EXTENSIONS
Bespoke Custom App & Native Function Engineering
Engineered with Shopify Functions, WebAssembly (WASM), and App Bridge 3.0. Replace expensive third-party apps with ultra-fast, native custom logic running directly on platform checkout edges.
1. SELECT EXTENSION RUNTIME
Shopify Function / Checkout Extension 2-3 WEEKS
$3,200
Fixed Sprint
Native WebAssembly checkout rules, custom discount engines, payment customization, or validation functions running at edge speeds.
MOST POPULAR
Full Bespoke App & Polaris Admin 5-7 WEEKS
$6,800
Fixed Sprint
Full-scale custom app with Polaris admin UI, automated order processing, custom customer portals, and proprietary API connectors.
Enterprise Custom Architecture 8-12 WEEKS
Custom Quote
Enterprise Engine
Complex custom apps handling millions in GMV with custom webhook ingestion pipelines, high-speed Redis queues, and multi-store federation.
Sub-5ms Execution Time
100% Native Edge Reliability
90-Day Full SLA & Patch Warranty
ZERO-LATENCY ARCHITECTURE
Modern Custom App & Native Function Stacks
We build native apps that eliminate recurring monthly SaaS app subscriptions while dramatically improving checkout speed.
CONVERSION ENGINEERING
Checkout UI Extensions
Post-purchase upsells, custom form fields, address validation, and loyalty rewards injected directly into the one-page checkout.
MERCHANT EXPERIENCE
Admin Action & Block Extensions
Custom modal actions and data display widgets directly inside the order and product admin screens.
NEW CUSTOMER ACCOUNTS
Customer Account UI Extensions
Self-service order management, return requests, warranty claims, and loyalty points inside native customer portals.
FULL-STACK FRAMEWORK
Remix & Polaris 12 Admin Apps
Production apps built on the official Shopify Remix stack with SQLite / Postgres and automated session tokens.
HIGH-SPEED TELEMETRY
Webhook Handlers on Edge Workers
Instant event ingestion and asynchronous dispatch using Cloudflare Workers with automated replay safeguards.
DETERMINISTIC SPRINT ROADMAP
4-Phase Deterministic Sprint Delivery
From GraphQL query modeling to Rust WASM compilation and production deployment.
PHASE 01
Requirements & Logic Modeling
Defining business rules, discount matrices, input queries, and schema boundaries.
PHASE 02
Function & Extension Engineering
Writing high-speed Rust / TypeScript code, compiling to WASM, and integrating Polaris components.
PHASE 03
Checkout Benchmarking & Testing
Simulating heavy traffic, verifying edge latency under 5ms, and testing edge cases with automated unit suites.
PHASE 04
Production Rollout & Documentation
Staging deployment, production activation, GitHub repository transfer, and recorded staff walkthrough.
⚡
ENTERPRISE CLIENT CASE STUDY
Apex Logistics: High-Throughput B2B Custom Discount & Tier Engine
Apex Logistics was paying thousands monthly for bloated third-party discount apps that slowed checkout load times to over 4 seconds. RivioApps engineered a bespoke Shopify Function in Rust running natively on the checkout edge. Execution time dropped to 1.8ms with zero server maintenance costs.
1.8ms
Calculation Latency
100%
Native Edge Uptime
$3.4M
Monthly B2B GMV
RESPONSIVE STOREFRONT PREVIEW
● 99/100 SPEED SCORE
Native Rust WASM Function Engine
1.8ms Execution Latency at 100% Native Edge Uptime
Mobile-First PDP
Instant Checkout
FREQUENTLY ASKED QUESTIONS
Custom App & Function FAQs
Common technical questions on bespoke functions, WebAssembly, and embedded Polaris applications.
Why choose Shopify Functions over traditional scripts?
Shopify Scripts are deprecated. Shopify Functions run on WebAssembly at the edge, scaling effortlessly to flash sale traffic with sub-5ms execution times and zero server infrastructure required.
Can a custom app replace my expensive monthly subscription apps?
Yes. Most stores spend hundreds or thousands per month on bundle apps, tiered pricing apps, and custom form builders. A one-time custom build eliminates recurring SaaS fees entirely.
Do you handle Shopify App Store submissions?
If you want a private custom app for your store only, no store submission is needed. If you want a public listed app, we handle full security compliance, partner verification, and store review submission.
How do you protect data security and compliance?
All apps use official OAuth 2.0 flows, encrypted session tokens, and strict GDPR webhooks to ensure full data privacy compliance.
⚡ ACCELERATE YOUR CHECKOUT
Ready to build native Shopify Functions or a bespoke custom app?
Connect directly with our technical lead to scope your logic requirements and calculate your potential SaaS cost savings.