A37 — eCommerce marketing company logo
Conversion/Full-Stack Development

When off-the-shelf
stops being enough.

Custom software, headless commerce, apps, and integrations — built by senior engineers who ship. When your growth needs something a theme or plugin can't do, A37 builds it properly.

Book a consultation

TypeScript · Next.js · APIs · Senior engineers

Built on the platforms you already run

TypeScriptNext.jsReactNodePostgreSQLSQLite

Plugins run out of road. Then what?

Every growing brand hits the wall where the platform can't do the thing that matters: a custom checkout, a headless frontend, an integration between systems that don't talk, a tool your ops team needs.

The usual answer is a stack of apps duct-taped together — slow, fragile, and expensive at scale. Or a dev shop that disappears after launch and leaves you with code nobody can maintain.

A37 builds custom software the way we build growth systems: senior engineers, clean and documented code you own, and a build scoped to the outcome — not billed by the hour into infinity.

What we build, end to end.

Custom Builds

  • Headless commerce frontends (Next.js + Shopify/commerce APIs)
  • Custom checkout and subscription flows
  • Internal tools and dashboards for your team
  • Customer-facing web apps and portals

Integrations

  • Connect the systems that don't talk: store, ERP, OMS, CRM
  • Payment, shipping, and tax API integrations
  • Data pipelines and sync between platforms
  • Third-party and internal API design

AI & Automation

  • AI features wired into your product or ops
  • Automation of manual, repetitive workflows
  • Custom reporting and data tooling

Engineering Quality

  • Clean, documented, testable code you own
  • Performance and security built in, not bolted on
  • CI/CD and a real deployment pipeline
  • Handover, docs, and optional ongoing support

How we ship custom software.

01

Step 1

Discovery & scope

We map the problem, the systems involved, and the outcome — then scope a fixed, honest build, not an open-ended hourly bill.

02

Step 2

Architecture

Technical design reviewed with you: stack, integrations, data model, and how it stays maintainable.

03

Step 3

Build & test

Senior engineers build in reviewable increments with tests, so you see progress and nothing is a black box.

04

Step 4

Ship & hand over

Deploy, document, and hand over code you own — with optional monitoring and support after launch.

The stack we build on.

Core

TypeScriptNext.jsReactNode

Data

PostgreSQLSQLiteRedisPrisma

Commerce

Shopify APIsStripeHeadless

Infra

VercelCloudflareDockerCI/CD

Is this the right fit?

  • You need something a theme, plugin, or app stack can't do
  • Your systems don't talk to each other and it's costing you
  • You want senior engineers and code you actually own
  • You need a headless build, custom app, or real integration
  • Not the right fit for a standard themed store (that's WebStore) or a marketing site (that's Website). This is for genuinely custom engineering.

Scoped to the outcome, not the hour.

Project-based

Fixed-scope quote after a free discovery and architecture call.

Optional monthly retainer for ongoing development and support.

Book a consultation

Free discovery call · Fixed scope · You own the code

Let's talk about your growth.

Book a consultation with Sid, A37's founder — he'll review your brand and show you where the fastest wins are.

Book a consultation

Everything your eCom brand
needs to grow.

Book a consultation
Performance Marketing for eCommerce brands — Paid Ads, Conversion Optimization, Analytics & Reporting

Performance Marketing

  • Paid Ads
  • Conversion Optimization
  • Analytics & Reporting
SEO Services for eCommerce brands — Technical SEO, Keyword Strategy, Content, Rankings

SEO Services

  • Technical SEO
  • Keyword Strategy
  • Content
  • Rankings
Digital Marketing for eCommerce brands — Full-Funnel, Social Media, Email & WhatsApp, Analytics

Digital Marketing

  • Full-Funnel
  • Social Media
  • Email & WhatsApp
  • Analytics
Email Marketing for eCommerce brands — Klaviyo Flows, Campaigns, Segmentation, Deliverability

Email Marketing

  • Klaviyo Flows
  • Campaigns
  • Segmentation
  • Deliverability
WhatsApp Marketing for eCommerce brands — Broadcasts, Cart Recovery, Chat Automation, WhatsApp API

WhatsApp Marketing

  • Broadcasts
  • Cart Recovery
  • Chat Automation
  • WhatsApp API
Content Creation for eCommerce brands — Copywriting, Design, Production, Blogs & Articles

Content Creation

  • Copywriting
  • Design
  • Production
  • Blogs & Articles
Web Design for eCommerce brands — Next.js, Responsive Design, Prototyping, CMS

Web Design

  • Next.js
  • Responsive Design
  • Prototyping
  • CMS
UI/UX Optimization for eCommerce brands — CRO, A/B Testing, Checkout UX, Heatmaps

UI/UX Optimization

  • CRO
  • A/B Testing
  • Checkout UX
  • Heatmaps
Mobile Apps for eCommerce brands — iOS & Android, Push Re-engagement, Loyalty, One-Tap Reorder

Mobile Apps

  • iOS & Android
  • Push Re-engagement
  • Loyalty
  • One-Tap Reorder
Branding for eCommerce brands — Logo Design, Strategy, Style Guides, Visual Identity

Branding

  • Logo Design
  • Strategy
  • Style Guides
  • Visual Identity
Videos for eCommerce brands — Storyboarding, Reels & Shorts, Editing, Motion Graphics

Videos

  • Storyboarding
  • Reels & Shorts
  • Editing
  • Motion Graphics
AI & Automation for eCommerce brands — AI Funnels, Chatbots, CRM Automation, Personalization

AI & Automation

  • AI Funnels
  • Chatbots
  • CRM Automation
  • Personalization
Marketplace Mgmt for eCommerce brands — Amazon & Noon, Flipkart & Myntra, Listings & Ads, Buy Box

Marketplace Mgmt

  • Amazon & Noon
  • Flipkart & Myntra
  • Listings & Ads
  • Buy Box
Process Optimization for eCommerce brands — Order Flows, Fulfilment, Returns, SOPs & Dashboards

Process Optimization

  • Order Flows
  • Fulfilment
  • Returns
  • SOPs & Dashboards
eCom Consultants for eCommerce brands — Growth Audits, Advisory, Market Entry, Team Structure

eCom Consultants

  • Growth Audits
  • Advisory
  • Market Entry
  • Team Structure

Let's Work Together

Stop managing marketing. Start growing your brand.

Start your free 15-day trial. We'll show you exactly how A37 would run your brand's growth, no fluff, no pressure, no pitch deck.

Start 15-Day Trial

No card required · Cancel anytime · Custom plan for your brand

Custom software for when off-the-shelf stops being enough

When plugins run out of road

A37 builds custom software, headless commerce, apps, and integrations with senior engineers who ship. When your growth needs something a theme or plugin can't do — a custom checkout, a headless frontend, a system integration — it gets built properly, as clean documented code you own. This is the engineering layer beneath the conversion surface: the store and site sit on top, custom builds power what they can't do alone.

Integrations are a common trigger: the store, ERP, OMS, and CRM that don't talk to each other, silently costing time and margin — the same operational leaks the process optimization and AI automation services attack from the workflow side.

Scoped to the outcome, not the hour

Every build starts with discovery and architecture, then a fixed, honest scope — not an open-ended hourly bill or a dev shop that disappears after launch. Senior engineers build in reviewable increments with tests, deploy through a real pipeline, and hand over code you own. Optional retainer for ongoing work. Start with the 15-day free trial to get the growth system alongside the engineering.

Frequently asked questions

What kind of things do you build?

Headless commerce frontends, custom checkout and subscription flows, internal tools and dashboards, customer portals, system integrations (store/ERP/OMS/CRM), and AI features wired into your product or ops.

What's your stack?

TypeScript, Next.js, React, and Node on the core; PostgreSQL/SQLite/Redis for data; Shopify APIs and Stripe for commerce; Vercel, Cloudflare, and CI/CD for infrastructure.

How is this different from WebStore or Website?

WebStore builds a themed storefront and Website builds a marketing site. Full-Stack Development is for genuinely custom engineering — headless builds, custom apps, and integrations a theme or plugin can't do.

Do I own the code?

Yes — clean, documented, testable code you own outright, with a real deployment pipeline and optional ongoing support. No proprietary lock-in.

How do you price custom builds?

A fixed-scope quote after a free discovery and architecture call, so the price maps to the outcome rather than open-ended hours. An optional monthly retainer covers ongoing development.

Start 15-Day Trial