// US-based TypeScript developers · Ecommerce
Free project plan & cost estimate in 48 hours.
Senior TypeScript developers for ecommerce brands, based in the US
Engineers who know a slow checkout or broken inventory sync costs real revenue, and who build stores and back-ends that hold up on sale days.
- Interview engineers before you pay anything
- 100% U.S.-based, working your hours
- No brief or spec needed to get started
First 5 Dev Hours Free
Project plan. Roadmap. Cost & ROI estimation.
Real engineers. Real conversations.
Talk to an engineer. Not a salesperson.
Free · No commitment · Project-focused call
Most teams interview matched engineers within a week
Not the right fit? We bring in a replacement
Get your free project plan
Three quick steps. No brief needed.
Free · No commitment · Reply within one business day
// teams we've worked with
“NextGen scaled us from 2 to 7 dedicated engineers in under a quarter. Enterprise-grade capacity, zero agency drag.”
Sound familiar?
- Inventory drifts between your store, marketplaces, and ERP.
- Pages are slow and conversion suffers.
- Promos and sale days expose fragile code.
- Your agency's backlog means changes take weeks.
What our TypeScript engineers build for ecommerce brands
Commerce systems
Checkout, catalog, inventory, and order syncs that hold up under peak traffic.
Full-stack apps
TypeScript across the front-end and back-end with shared types.
JavaScript to TypeScript
Existing codebases migrated gradually without freezing feature work.
How it works
- 01
Pick a time
Book a 30-minute project call directly in our calendar.
- 02
Talk through the problem
Tell us what needs building, what's stuck and what success looks like. No spec needed.
- 03
Your plan in 48 hours
Get your project plan, roadmap, cost and ROI estimates. The plan is yours to keep.
- 04
First 5 dev hours free
Agree the scope with our team. Decide whether to continue before any paid work begins.
Common questions
Will this turn into a sales pitch?
No. The call is about your project: what needs building, what's stuck, and whether we have the right engineers. If we're not a fit, we'll say so.
What do I get for free?
A project plan, roadmap, cost estimate and ROI estimate within 48 hours of your project call. Your first 5 development hours are free, too. We agree the scope and any paid work with you before proceeding.
Do I need a spec or brief?
No. Tell us the problem in plain words and we'll help shape the scope with you.
Are the engineers really in the U.S.?
Yes. Every engineer lives and works in the United States. No offshore hand-offs, and that's in the contract.
What our clients say
"NextGen scaled us from 2 to 7 dedicated engineers in under a quarter. Enterprise-grade capacity, zero agency drag."
"Their R&D tax credit workflow platform paid for itself in the first filing season."
"AI-native from day one. Our IRS transcript pipeline runs 24/7 without a human in the loop."
"Property tax appeals used to take weeks. Their comp analysis tooling turned it into hours."
"The AI intake agent handles our tier-1 patient calls with a hand-off cleaner than our old call center."
"POS, inventory, ordering — all unified. We finally have one source of truth across every location."
"The procurement platform paid for itself in the first quarter of use."
"They shipped our matching engine in 6 weeks. Our old team would've taken 6 months."
"Enterprise-grade delivery without the enterprise-agency price tag."
"Their team plugged into our sprint on day one. Zero ramp time."
"NextGen scaled us from 2 to 7 dedicated engineers in under a quarter. Enterprise-grade capacity, zero agency drag."
"Their R&D tax credit workflow platform paid for itself in the first filing season."
"AI-native from day one. Our IRS transcript pipeline runs 24/7 without a human in the loop."
"Property tax appeals used to take weeks. Their comp analysis tooling turned it into hours."
"The AI intake agent handles our tier-1 patient calls with a hand-off cleaner than our old call center."
"POS, inventory, ordering — all unified. We finally have one source of truth across every location."
"The procurement platform paid for itself in the first quarter of use."
"They shipped our matching engine in 6 weeks. Our old team would've taken 6 months."
"Enterprise-grade delivery without the enterprise-agency price tag."
"Their team plugged into our sprint on day one. Zero ramp time."
Hire US-based TypeScript ecommerce developers from NextGen Coding Company for headless storefronts, catalog integrations, and checkout workflows. A useful project brief names the commerce platform and frontend: Shopify Storefront API with Next.js App Router, Hydrogen with React Router, or a Medusa backend. It should also identify the buyer-facing problem, such as stale inventory, incorrect variants, or a cart that loses state.
Commerce changes cross several boundaries: product data, customer sessions, payment providers, and fulfillment events. TypeScript helps describe those contracts, but Zod validation, webhook verification, and Playwright checkout tests address failures that static types cannot prevent. Our engineers live and work in the US, attend your standups, and follow your working hours. NDA and full IP assignment come before code access.
Frequently asked questions
- Should we use Next.js or Hydrogen for a TypeScript Shopify storefront?
- Choose based on your existing application and Shopify requirements. Hydrogen provides Shopify-oriented storefront tooling and React Router foundations. Next.js App Router suits teams already using Next.js across content and commerce. Compare hosting, caching, customer accounts, and Storefront API integration needs before choosing; TypeScript alone does not determine the better architecture.
- How do we prevent stale prices and inventory in a headless storefront?
- Define which system owns price and stock, then set caching rules around that source. In Next.js, tag-based revalidation can refresh cached product content after verified Shopify webhooks. Recheck availability through the commerce platform during cart and checkout operations, because a typed product object does not guarantee current inventory.
- Can TypeScript help prevent duplicate orders from payment webhooks?
- TypeScript can model payment events, but duplicate prevention requires runtime controls. Verify webhook signatures, store provider event identifiers, and process updates idempotently. With Stripe, distinguish successful payment confirmation from a browser redirect. Test retries, delayed events, and out-of-order delivery before connecting payment state to fulfillment actions.
- What automated tests should a TypeScript ecommerce project include?
- Use Vitest for pricing transformations and cart reducers, plus Playwright for product selection, discount application, and checkout entry. Exercise guest and signed-in sessions, unavailable variants, and payment failure paths. Run payment flows against provider test environments, and keep live credentials and real customer data out of test fixtures.
- How do we start hiring for a TypeScript ecommerce project?
- Book a 15-minute call with your platform details, storefront framework, and most urgent purchase-flow issue. Most teams interview matched engineers within a week of that conversation. Useful interview topics include Shopify API versioning, cart persistence, and webhook handling. If the fit is wrong, a replacement comes with a proper hand-over.
- Are your developers really based in the US?
- Yes. Every engineer lives and works in the United States. No offshore subcontracting and no hand-offs to another team. That's written into the contract.
- How fast can someone start?
- Most teams interview matched engineers within a week of the first call. Start dates depend on your interview process.
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- Senior engineer salary guide 2026
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- Resource library
Every guide and benchmark we publish.
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