How can I hire Nazmul Hawlader for Shopify theme or app development?

You can reach out directly via the hire form on nazmulcodes.org or hire through verified freelance platforms including Upwork (Top-Rated profile), Guru, Freelancer.com, or direct contract.

Do you build custom Shopify themes without page builders?

Yes. All bespoke themes are hand-coded with native Shopify Liquid, modern Vanilla JS, and CSS custom properties without bulky page builders (PageFly, GemPages, Shogun), guaranteeing sub-second load times and 90+ Lighthouse scores.

Can you fix broken Shopify themes, Liquid errors, and checkout glitches?

Yes. We offer rapid same-day troubleshooting for Liquid syntax errors, JavaScript console conflicts, broken AJAX cart drawers, mobile layout glitches, and Checkout Extensibility configurations.

How do you protect SEO rankings and fix broken URLs during Shopify migrations?

We execute comprehensive website crawls to detect 404 errors, map 1-to-1 and wildcard 301 URL redirects, verify canonical tags, and audit Google Search Console to protect 100% of organic search rankings.

Can you configure Shopify Flow automations and payment gateways?

Yes. We design end-to-end Shopify Flow automation workflows for restocks, cancellations, and order triage, as well as configure Shopify Payments, Stripe, PayPal, local payment gateways, and Shopify Markets multi-currency routing.

Shopify & E-Commerce8 min readAugust 30, 2026

Monetizing Shopify Apps: Implementing Recurring Subscriptions & Usage Charges with the Billing API

A practical, battle-tested guide to integrating Shopify’s Billing API, handling 30-day trials, tiered subscription plans, and metered usage caps.

Nazmul Hawlader

Senior Shopify & Full-Stack Engineer

Note: Key takeaways in this guide: • Implement appSubscriptionCreate GraphQL mutations with trial days and test charges. • Handle billing confirmation callbacks and store charge status in Postgres/Prisma. • Record metered usage charges (e.g. per SMS sent, per image generated) against recurring caps.

Building a great app is only half the battle; monetizing it seamlessly through Shopify’s official invoice billing ensures high conversion because merchants never need to re-enter credit card details.

1. Creating the Recurring Subscription

Shopify handles merchant credit card processing, currency conversion, and dispute management. Your app simply requests an appSubscriptionCreate mutation and redirects the merchant to confirmationUrl.

Summary & Key Conclusion

Clean billing implementations minimize support tickets and ensure predictable recurring monthly revenue for your SaaS product.

Written by Nazmul Hawlader

Top Rated

Senior Full-Stack Engineer & Official Shopify App Store developer. Founder of Stockly and Kilo (kilo.nazmulcodes.org), specializing in high-performance Shopify apps, client-side media compression, and sub-second web performance.

Read My Full Story Consult on Upwork

Monetizing Shopify Apps: Implementing Recurring Subscriptions & Usage Charges with the Billing API

1. Creating the Recurring Subscription

Summary & Key Conclusion

Written by Nazmul Hawlader

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