Custom Apps · Internal Tools · API Integrations

The custom web app your business needs
when a template cannot do the job.

When your team has outgrown plugins, spreadsheets, and disconnected tools, you need a senior engineer to build the right system: owned, version-controlled, and integrated cleanly with your existing stack.

Book a 15-min Strategy Call See the case study

Node.js · React · Remix · Shopify CLI · Polaris · senior engineering since 2014

The Reality

SaaS subscriptions can't ship what you actually need.
Custom code can.

Every brand hits a point where their workflows are too specific for off-the-shelf tools. That's when the SaaS subscriptions multiply, the workarounds break, and a focused custom build starts paying for itself in weeks.

Where you are now

  • Paying for SaaS tools that do not talk to each other
  • A Zapier setup that breaks every time an API updates
  • Manual exports + spreadsheets + reuploads, 3 hours every Monday
  • Workarounds your team forgets exists when staff turns over
  • A feature request that's "on the roadmap" of three different vendors

Where I take you

  • +One bespoke tool that owns the workflow end-to-end
  • +Proper API integrations with retry logic and error alerts
  • +Source code you own — not a subscription that vanishes if the vendor pivots
  • +Documentation your team can actually onboard from
  • +SaaS bills that drop to zero — you only pay hosting
What I Build

Three categories. Same engineering standard.

01

Custom Shopify Apps

Private or public Shopify apps built on the modern stack — Remix, Polaris, Shopify CLI 3. Bundles, gifting flows, custom checkout extensions, B2B tools. Submission-ready if you want to list.

Remix · Polaris · App Bridge · Functions

02

Internal Tools & Dashboards

React/Next.js dashboards that pull from your Shopify, CRM, payment processor, and warehouse — in one screen. Built for your team's actual workflow, not generic admin UIs.

React · Next.js · Postgres · auth

03

Custom API Integrations

Bespoke connections between your stack — Shopify ↔ ERP, NetSuite ↔ Klaviyo, custom OMS ↔ 3PL. With retry logic, error alerts, and observability so you know when something breaks.

REST · GraphQL · webhooks · queues

Flagship Build

A custom warehouse tool. 15 hours/week, gone.

A US apparel brand on Shopify Plus was burning 15 hours/week manually reconciling orders between Shopify, their 3PL, and their accounting system. Three weeks later, a custom internal dashboard handled the entire flow — automated reconciliation, exception flagging, and one-click resolution for the edge cases.

"Adnan is great at what he does and always goes above and beyond. The custom tool he built paid for itself in six weeks — and our ops team genuinely uses it every day."

AP
Verified Client · Operations Lead
US Apparel · ✓ Verified Upwork Review
15hrs/wk

Ops time eliminated

3wk

Spec to production

6wk

Payback period

0

Extra SaaS layers

The Engagement

Three steps. From spec to production.

01

Discovery & Spec

We map the workflow, the integrations, the edge cases, and the constraints. You get a written spec, a written scope, and a hard timeline. No back-of-envelope estimates.

02

Build & Iterate

Sprints of 5–10 days with a working staging build at the end of each. You use it, find what's missing, and we refine. Source code in your Git from day one.

03

Deploy & Document

Production deploy, monitoring set up, team training session, and full written documentation. 30 days of post-launch tuning included on every project.

Book a Strategy Call

15 minutes. Real scoping. No fluff.

Submit the form and I'll review your workflow before we talk. On the call, I'll tell you what's worth building custom, what's better as a SaaS subscription, and what the realistic scope looks like.

  • Honest build-vs-buy recommendation
  • Realistic scope & timeline
  • A written scope — only if it fits

No newsletters. No list-rental.

Request received.

I'll review your workflow and reply within 4 hours.

FAQs

The questions every operator asks first.

How do I know if custom is worth it vs. just using a SaaS? +
Math. If your team is burning more than ~10 hours/week on a workflow no SaaS handles cleanly, custom usually proves its value in 3–6 months. On the strategy call I'll do that math with you honestly — and recommend a SaaS if that's the better answer.
What's your tech stack? +
For Shopify apps: Remix + Polaris + Shopify CLI 3. For internal tools: Next.js + Postgres + Tailwind. For integrations: Node.js + queue workers (BullMQ or similar). Always TypeScript. Always Git-versioned. Always documented.
Do I own the source code? +
Yes — 100%. Code goes into your Git repo from day one. No "preferred hosting" lock-in, no licensing tricks. If we stop working together, you own everything and can hand it to another developer without missing a beat.
What about hosting and maintenance? +
I'll recommend (and set up) the right hosting — usually Vercel, Fly.io, or Railway depending on the workload. Hosting adds overhead are modest and scale with usage. Most clients move to a lightweight ongoing support plan for ongoing updates after the 30-day support window ends.
What does a custom app effort? +
Shopify apps, internal dashboards, and API integrations are all scope-led, scoped to complexity. Exact number after the discovery call — no open-ended billing.
Book a free 15-min audit