JOY MENDONCA
Lead Backend EngineerPune, India · Working globally

I build commerce systems that survive the real world.

I'm Joy - a Lead Backend Engineer working across Shopify, POS, integrations and automation. I turn messy business problems into reliable systems. Usually after someone says, “it should be simple.”

See selected work A little about me
SELECTED WORK01-04

01 / SELECTED WORK

Systems, not screenshots.

The best backend work is mostly invisible. Here are a few kinds of problems I enjoy making disappear.

01MULTI-STORE COMMERCE

One platform. 600+ stores. Plenty of ways to make it interesting.

Architecture and technical delivery for a large Shopify POS rollout: automated store provisioning, cross-store data flows, POS extensions, promotions, and the operational tooling needed to keep the whole thing manageable.

Shopify Plus · POS · Functions · Celigo · Playwright
02COMMERCE INTEGRATIONS

Connecting Shopify to everything Shopify was never meant to know about.

Reliable middleware for orders, products, customers, fulfillment and availability-designed around retries, idempotency, observability and the inconvenient fact that external APIs occasionally have opinions of their own.

Node.js · Laravel · GraphQL · REST · NetSuite
03EVENT-DRIVEN DELIVERY

From checkout to last mile, without crossing any fingers.

Event-driven order and fulfillment integrations that move commerce data through queues, serverless functions and delivery systems while keeping customer-facing status accurate.

.NET · AWS Lambda · EventBridge · SQS · DynamoDB
04SUBSCRIPTION SYSTEMS

Keeping recurring orders in sync-even when life is not.

Webhook-driven subscription middleware that coordinates parent and add-on subscriptions across frequency changes, skips, cancellations, quantities and next-charge dates.

Recharge · Google Cloud · Node.js · Cloudflare

02 / WHAT I DO

I live in the complicated middle.

A / ARCHITECTURE

Commerce systems

Shopify Plus, POS, Functions, subscriptions and multi-store platforms shaped around how the business actually operates.

B / ENGINEERING

Complex integrations

APIs, middleware and event-driven systems that move data safely across platforms, even when the happy path takes the day off.

C / DELIVERY

Technical leadership

Turning ambiguous requirements into a plan that engineers can build, clients can understand and production can live with.

03 / ABOUT

Lead Backend Engineer by title. Solutions architect by recurring calendar invite.

I'm a Lead Backend Engineer at Anatta, a Shopify Platinum Partner. My work sits where commerce platforms, business rules and operational reality collide-which is generally where things get interesting.

I've worked across Shopify, Laravel, Node.js, .NET, AWS and GCP, building everything from POS extensions to serverless middleware. The tools change. The job stays the same: understand the real problem, design for failure and keep the explanation human.

The more conventional career version is on LinkedIn

04 / OPERATING PRINCIPLES

A few things I believe.

  1. 01

    “Boring” is a compliment. Predictable systems make exciting businesses possible.

  2. 02

    Scale changes the shape of the problem. Six hundred stores is not one store copied six hundred times.

  3. 03

    Documentation is part of the system. If only the person who built it understands it, it is not finished.

  4. 04

    Keep the explanation human. Complexity is sometimes necessary. Confusion rarely is.

05 / WRITING

Notes from the complicated middle.

Practical writing on Shopify, integrations, architecture and the production lessons that rarely make it into the API documentation.

Read the notes

06 / SAY HELLO

Got a complicated commerce problem?

Excellent. Those are the fun ones.

joymendonca1999@gmail.com LinkedIn