What We Offer

Software Development & Cybersecurity Services

What we build, end to end — custom CRMs, Stripe and licensing infrastructure, Next.js apps, and full-scope penetration testing.

Build & Ship

Custom software, CRMs, Next.js apps, cloud infrastructure, and algorithmic trading systems — production-grade work shipped end to end.

Custom Business Software

CRMs, dashboards, work orders, internal tools

Internal platforms shaped around your workflows — not the other way around. Shipped across 4+ industries.

In production across 4 industries

Custom CRM Development

Pipeline software for the way you actually sell

Custom CRMs built on Next.js + PostgreSQL. Pipeline, automation, reporting. You own the code — no per-seat tax.

8 to 16 weeks to production

Next.js Web Applications

SaaS apps, client portals, platforms

Full-stack web applications built on Next.js and deployed on Vercel with global CDN. Built for real use, not demos.

Full-stack web apps in production

Cloud Infrastructure & DevOps

Deploy, monitor, scale — without the 3am pages.

Docker, Nginx, CI/CD, auto-scaling, Sentry monitoring on DigitalOcean, Fly.io, and Vercel. Zero unplanned outages.

Zero unplanned outages

Algorithmic Trading Systems

Live trading bots running real money

MA Supertrend, VWAP, momentum, multi-strategy setups. Real-time market feeds, configurable risk, 24/7 uptime.

5 live systems deployed

Payments, Subscriptions & Licensing

Stripe Checkout, Stripe Billing, subscription lifecycle, license keys, JWT validation, and seat management — wired into your product, not bolted onto it.

Stripe Integration

Production-grade Stripe Checkout, Billing, and webhooks

Stripe Checkout, Stripe Billing, subscription lifecycle webhooks, customer portal, and tax handling — wired into Next.js the right way.

Founder-led Stripe builds

Subscription Billing

Recurring revenue infrastructure that doesn't leak

Plan tiers, metered usage, proration, dunning, churn recovery, revenue dashboards. Stripe Billing or custom — your call.

Recurring revenue done right

Software Licensing System

License keys, JWT validation, seat management

License servers with JWT validation, usage tracking, machine fingerprinting, and seat management for desktop, SaaS, and bot distribution.

Licensed bot and SaaS distribution

Payments, Invoicing & Licensing

Get paid. Manage access. Ship software.

The combined parent service — Stripe, ACH, auto-invoicing, revenue dashboards, license servers, and seat management.

Live payment and licensing systems shipped

Cybersecurity & Pentest

Full-scope penetration testing — network, web app, Active Directory, and MITRE ATT&CK-aligned engagements. Real attacks, real evidence, real remediation.

Penetration Testing

We break in so someone else doesn't.

Full-scope pentests across network, wireless, web app, and Active Directory. Custom 11-module red team toolkit, mapped to MITRE ATT&CK.

Custom red team toolkit with 11 attack modules

Web Application Pentest

Real exploits, not just Burp scan output

OWASP Top 10, IDOR chains, broken auth, business-logic bugs, API security. Manual exploitation against staging or production.

Manual exploitation, real payloads

Network Pentest

Internal and external network attack simulation

Perimeter assessment, internal pivot testing, lateral movement, credential abuse, and detection-evasion playbooks for your blue team.

Internal + external scopes

Active Directory Pentest

Kerberoasting, ADCS abuse, Domain Admin path

Full AD attack chain: Kerberoasting, AS-REP, ADCS (ESC1–ESC11), delegation abuse, credential dumping, and the path to Domain Admin.

Standard user to Domain Admin

MITRE ATT&CK Assessment

Map your defenses to real adversary TTPs

Threat-emulation engagements that exercise documented APT/ransomware TTPs and produce a defended/missed heatmap for your SOC.

ATT&CK-mapped purple team

Topic clusters

Pick a cluster, not a single service

Most QUANT LAB engagements span three or four pages of this site — a service, a comparison, a blog deep-dive, and a calculator. These five clusters bundle the pages that go together, so you can read the whole topic in a sitting.

Custom CRM Cluster

Pillar: Custom CRM Development

Sales pipeline software shaped around how your team actually closes deals — not a generic SaaS template.

Stripe & Payments Cluster

Pillar: Payments, Invoicing & Licensing

Stripe Checkout, Stripe Billing, license servers, and webhook infrastructure wired into Next.js the right way.

Penetration Testing Cluster

Pillar: Penetration Testing

Manual offensive security — web app, network, Active Directory, and MITRE ATT&CK-aligned engagements.

Build vs Buy Cluster

Pillar: Build vs Buy Decision Framework

When custom code wins, when SaaS wins, and how to model the three-year TCO for your specific call.

SaaS Engineering Stack Cluster

Pillar: Next.js Web Applications

Production-grade Next.js builds — multi-tenant data isolation, framework selection, and platform engineering patterns.

Where We Serve

Georgia-based, working with clients across 14 US metros. Engagements run remotely by default; in-person scoping and red-team work available in Atlanta and the Southeast.

Atlanta, GA Macon, GA Augusta, GA Columbus, GA Savannah, GA Miami, FL Austin, TX Dallas, TX Chicago, IL Seattle, WA New York, NY Charlotte, NC Nashville, TN San Francisco, CA

Industries We Build For

Deeper context on how our software and security work shows up in specific verticals.

Fintech

Trading systems, payments, brokerage integrations.

Construction

Estimating, lead routing, project tracking.

Insurance

Policy management, claims, agent portals.

E-Commerce

Custom carts, subscription billing, Shopify alternatives.

Healthcare

HIPAA-aware platforms, intake, scheduling, ops dashboards.

Compare

Trying to decide between a SaaS platform and a custom build? Read the head-to-head.

Custom CRM vs Salesforce

What you pay, what you own, and when each one is the right call.

Custom Storefront vs Shopify

Where Shopify wins, where it caps your unit economics, and when to leave.

Not sure which fits?

Most projects touch two or three of these. Book a free consultation and we'll figure out what the right build actually looks like — or tell you if there's a better off-the-shelf option.

Or talk to us directly: (770) 652-1282 · beltz@quantlabusa.dev