Subscription compliance software scaling its product team
Client · FileForms
Stripe Subscription SaaS MVPsU.S.-Based Engineers · NYC HQ
Stripe Subscription SaaS MVPs.
Billing that works
on day one.
We design and build subscription SaaS MVPs with Stripe Billing wired in from the first sprint — Checkout, Customer Portal, trials, proration, dunning, metered pricing, and entitlements. Senior U.S. engineers, in your time zone, shipping to production in weeks.
deploy:Stripe Billing
install:Subscription MVP
Published rates from $5k/mo · senior U.S. engineers · no offshore handoffs · see full rates
Stripe Billing & CheckoutMetered + seat-based pricingWebhooks & reconciliation100+ Projects Delivered100% U.S.-Based TeamSaaS · Fintech · Healthtech
Stripe Billing, Checkout & Customer Portal
Seat-based, tiered, and metered pricing
100% U.S.-based delivery team
EST business hours support
MVP in production in weeks, not quarters
Flexible monthly engagements
SaaS, fintech, healthtech & AI products
"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."
// trusted by
// partners & platforms
// certifications & recognition
// conferences & events
Projects Delivered
100+
Typical MVP to Launch
6-10 Weeks
U.S.-Based Engineers
75+
Avg. Response Time
1 Day
// the problem
Hiring in-house software developers in 2026 takes months.
Fierce competition
Every company is fighting for the same shrinking pool of senior software developers.
Months to hire
Internal recruiting cycles take 3–6 months to land a single permanent developer.
Hundreds of hours lost
Tech leadership burns out screening, interviewing, and onboarding candidates.
But you still have roadmaps to deliver and deadlines to meet.
// the solution
Get our devs on your team within 2 weeks.
Software Developers
QA Engineers
AI / ML Engineers
Cloud Engineers
Project Managers
Hundreds of senior U.S.-based engineers at your disposal
EST time zone alignment for seamless real-time collaboration
Senior developers with 8+ years of production experience
// vetting process
We only hire the top 1% of tech talent. Here's how.
Click each step to see exactly what every candidate goes through before they ever touch your code.
// candidate funnel
→ Top 1% hired
Step 01 of 05
Job Application
We screen thousands of senior U.S. applicants every month.
Only resumes with 8+ years of production experience, prior senior or staff titles, and verified U.S. work authorization advance to round two.
// how we compare
Why teams pick NextGen over agencies, marketplaces & portals.
NextGen AI-Native · NYC | Dev Agencies Encora, BairesDev | Marketplace Toptal, Upwork | Hiring Portals ZipRecruiter, Monster | |
|---|---|---|---|---|
| CTO-led vetting | No | No | No | |
| We handle all upfront vetting — you only meet top 1–2 candidates | No | No | No | |
| Senior / staff-level engineers | Sometimes | Sometimes | Sometimes | |
| Flexible hiring models (single dev, pod, or full team) | No | No | No | |
| 100% U.S.-based, EST business hours | No | Sometimes | Sometimes | |
| AI-native — every engineer ships AI into your product | No | No | No | |
| Onboard within 2 weeks | Sometimes | No | ||
| Transparent monthly pricing | No | Sometimes | No |
// engagement models
Three ways to ship your subscription MVP
Add Stripe billing to an existing app, build the whole subscription SaaS MVP, or scale monetization past launch — all 100% U.S.-based, all on a monthly engagement.
// swim lanes
Compare plans, side by side
Full pricing details →// compare plans
Swim Lanes
Free Assessment
$0
Dedicated Engineer
$16K/mo
Most Popular
Engineering Pod
$32K/mo
Enterprise Pod
$75K/mo
Key Deliverables
Engagement Output
Engineering assessment & roadmap
1 engineer shipping in your sprints
Small squad owning a product area
Cross-functional pod owning a product
Engineer Capacity
—
~160 hrs/mo
~320 hrs/mo
~640 hrs/mo
Blended Bill Rate
—
$100/hr
$100/hr
~$117/hr
Onboarding Time
—
1 week
1–2 weeks
2 weeks
First Production Ship
—
Sprint 1
Sprint 1
Sprint 1–2
Engagement Length
One-time
Monthly
Monthly
Quarterly
Team Composition
Dedicated Engineers
—
1
2
4
Dedicated QA Specialists
—
Shared
Shared
1
QA Automation Engineer
Add-on
Add-on
Shared
Delivery Manager
—
Shared
Shared
Shared
Technical Lead
—
Shared
Shared
Shared
Cloud & AI Specialists
Add-on
Add-on
Capacity & Delivery
Sprint Participation
Architecture Reviews
Roadmap Execution
Release Management
Program Governance
QA Automation
Automation Framework Setup
Add-on
Add-on
E2E Test Suites (Playwright/Cypress)
Add-on
Add-on
API & Integration Tests
Add-on
Add-on
CI/CD Test Integration
Add-on
Regression Automation
Add-on
Performance & Load Testing
Optional
Visual Regression Testing
Optional
Test Coverage Reporting
Basic
Support & Reporting
U.S.-Based, EST Hours
NYC In-Person Available
Weekly Reporting
Monthly Executive Reporting
Priority Support
All plans include 100% U.S.-based talent, EST hours, and monthly flexibility.
Schedule Engineering Assessment →// capabilities
Five disciplines behind every subscription launch.
Stripe Billing Architecture
Products, prices, and plan hierarchies modeled so pricing changes later don't require a rewrite.
Subscriptions & Entitlements
A clean subscription data model in your own database that gates features, seats, and limits reliably.
Checkout & Customer Portal
Hosted Checkout or embedded Elements, self-serve upgrades, downgrades, cancels, and invoice history.
Webhooks & Reconciliation
Signature verification, idempotency keys, retry-safe handlers, and nightly reconciliation against Stripe.
MVP Product Engineering
React, Next.js, Node, and Python built by senior U.S. engineers — the product around the billing, not just the billing.
// how we work
A clear path from idea to production
Five steps, no mystery. You always know what we're doing this week, what ships next, and who's accountable.
- 01
Discovery
We map your goals, constraints, and tech landscape. Outputs: scope, roles, and a realistic timeline.
Week 1 - 02
Prototype
Clickable prototype or thin-slice build to de-risk the hardest parts before full investment.
Weeks 2–3 - 03
Build
Embedded engineers ship in weekly increments with QA built in — not bolted on at the end.
Ongoing - 04
Deploy
Production launch with monitoring, runbooks, and a clean handoff to your team.
Release week - 05
Support
Ongoing maintenance, iteration, and on-call coverage as your product scales.
Month 2+
// featured engagements
Embedded with software teams that ship revenue
All case studies →Recurring-revenue tax platform engineering
Client · TaxNow
Built cloud tax management workflows on AWS
AI product engineering with usage-priced workloads
Client · Perreign AI
Designed a regulatory intelligence assistant for compliance teams
Financial data workflows and reconciliation engineering
Client · Imperial Capital
Built document processing workflows for investment banking materials
// why billing first
<Ship Revenue, Not Just Software/>
Most MVPs launch without a real billing layer, then spend the next two quarters retrofitting one — untangling proration, chasing failed payments, and rebuilding a subscription model that was never designed. We invert that: subscription billing is part of the architecture from sprint one, so your first customer can pay you the day you launch, and your pricing can change without a rewrite.
// 01 / what we build
Everything a Stripe subscription product needs
Stripe subscription SaaS MVP development is more than a Checkout button. It's the price book, the entitlement model, the webhook pipeline, and the reporting — built by the same full-stack engineering team that builds the product around it, with AI development services available when your product is priced by usage.
Plans & Price Books
Flat, tiered, seat-based, and hybrid prices structured for experimentation.
Start project request →Trials & Onboarding
Free trials, card-optional starts, trial-end conversion, and grace periods.
Start project request →Proration & Plan Changes
Mid-cycle upgrades, downgrades, and seat changes with correct proration math.
Start project request →Dunning & Recovery
Smart retries, failed-payment emails, and involuntary churn recovery flows.
Start project request →Tax with Stripe Tax
Automatic sales tax and VAT calculation and collection at checkout and on invoices.
Start project request →Usage Metering
Meter events, aggregation, credit grants, and overage billing for usage-priced products.
Start project request →Invoicing & Receipts
Branded invoices, purchase orders, annual contracts, and finance-friendly exports.
Start project request →Entitlements & Feature Flags
Plan-driven access control enforced server-side, not just hidden in the UI.
Start project request →MRR & Revenue Analytics
MRR, ARR, churn, and expansion reporting your team and investors can trust.
Start project request →Legacy Billing Migration
Move subscribers off homegrown or legacy systems without dropping renewals.
Start project request →Test-Mode QA
End-to-end billing test suites in Stripe test mode, including webhook replay.
Start project request →Launch Hardening
Key rotation, least-privilege access, alerting, and runbooks before you go live.
Start project request →// 02 / who we build for
Teams launching recurring revenue
From first-paying-customer MVPs to multi-product catalogs with usage-based pricing — we've built subscription software for regulated and unregulated markets alike.
// 03 / the build
From pricing model to first paid invoice
Weeks 1-2
Pricing & architecture
We model plans, seats, usage dimensions, and entitlements, then map them to Stripe products and prices before a line of billing code is written.
Scope this phaseWeeks 3-6
Build the MVP + billing layer
Product features, Checkout or Elements, Customer Portal, trials, proration, and idempotent webhook handlers shipped in parallel each sprint.
Scope this phaseWeeks 7-10
Harden, test & launch
Test-mode QA across the full subscription lifecycle, dunning and recovery, MRR reporting, reconciliation, then production cutover.
Scope this phase// 04 / research
Before you scope the build
How much does it cost to build an app?
Read: Budget ranges →How long does it take to build an app?
Read: Timelines →How to choose a tech stack for a new SaaS product
Read: Stack selection →Engineering research and whitepapers from our delivery team
Read: All research →// 05 / our talent
Top talent. Relentless craft.
Our team includes engineers from Columbia, Harvard, and Oxford, alongside industry experience from Apple, Citi, and Wells Fargo. Payments, subscriptions, and financial workflows are core territory for us — the same rigor a bank expects, applied to your subscription MVP.
Past Experience
Universities
// faq
Frequently asked questions
- What is Stripe subscription SaaS MVP development?
- It's building the first shippable version of a SaaS product with recurring revenue wired in from day one: Stripe Billing price books, Checkout or an embedded payment flow, the Customer Portal, trials, proration, dunning, webhook handling, and entitlements that actually gate features. You launch with a product that can charge customers, not a demo you have to retrofit billing into later.
- How long does a Stripe subscription MVP take to build?
- Most subscription MVPs run 6-10 weeks from kickoff to production, depending on how many plans, pricing dimensions, and integrations are in scope. A billing-only engagement — adding Stripe subscriptions to an existing app — is typically 3-5 weeks. Engagements start within 7-14 days of the scoping call.
- How much does it cost?
- We work from published rates: a $16,000/mo dedicated senior engineer, a $32,000/mo two-engineer pod, or a $75,000/mo enterprise pod with QA. Fixed-scope work starts at a $1,000 Discovery Sprint. Annual prepay saves 15%. Full rates are on the pricing page.
- Can you do usage-based, metered, or hybrid pricing?
- Yes. We implement seat-based, flat-rate, tiered, metered, and hybrid models on Stripe Billing — including usage aggregation, idempotent meter events, credit grants, overages, and mid-cycle plan changes with correct proration. Usage-priced AI products are a common engagement for us.
- Should we use Stripe Billing or build our own billing system?
- For an MVP, almost always Stripe. Rolling your own subscription engine means owning proration math, invoice state machines, tax, retries, and reconciliation before you have product-market fit. We use Stripe for the money movement and keep a thin, well-modeled subscription/entitlement layer in your own database so you're never locked out of your own data.
- What about PCI compliance and security?
- Using Stripe Checkout or Stripe Elements keeps card data off your servers, which puts you in the lightest PCI scope available (SAQ A / A-EP depending on the integration). We build with webhook signature verification, idempotency keys, least-privilege API keys, and audit-friendly logging, and we can align delivery with an existing SOC 2 program.
- Do you migrate existing subscribers from another billing system?
- Yes — migrations off legacy or homegrown billing, including importing customers and payment methods into Stripe, mapping legacy plans to new price objects, preserving renewal dates, and running a reconciliation pass so MRR matches before and after cutover.
- What happens after launch?
- Engagements are monthly, so the same engineers stay on for post-launch iteration: pricing experiments, failed-payment recovery, new plans, revenue reporting, and scaling the product past the MVP. No handoff to a different team.
// related
Explore NextGen
// let's build something
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// what to expect
- Response within 1 business day
- 30-minute discovery conversation
- Recommended engagement model & pricing
- NYC-focused — in-person available
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