Your async backend & AI engineering partner — fast, reliable, fixed price.
We help SaaS founders and startups ship backend, AI features, and automations without hiring, managing, or waiting months.
Trusted by founders, startups, and product teams in 7+ countries
7+
Years of combined experience
15+
Products shipped
R$95K
Project delivered in 8 weeks
3/5
Dev Club spots available
You're burning runway on broken dev workflows
Freelancers disappear
You hired someone on Upwork. They delivered late, broke things, and ghosted. Now you're back to square one.
Agencies are slow and expensive
You're paying $15K/mo for a team that moves at their pace. Half the budget goes to PMs who don't write code.
Hiring takes forever
40 interviews later, you still don't have a senior backend engineer. Meanwhile, your product isn't shipping.
💡 The real cost isn't money — it's time. Every week without a reliable backend partner is a week your competitors are shipping and you're not.
One subscription. One engineering team.
Everything you need to ship.
You submit requests, we build — APIs, AI features, payment integrations, automations — and deliver production-ready code, fast.
No hiring.
No interviews, no onboarding, no payroll.
No meetings.
Async-first. Loom + Linear + GitHub.
No surprises.
Fixed monthly price. Cancel anytime.
Senior-level output.
Every delivery is production-ready, reviewed, and documented.
Simple pricing. No hidden fees.
Cancel anytime. Your code is always yours.
Tech Audit
Full code review, architecture analysis, infra assessment, security check.
- •PDF report + Loom walkthrough
- •3-5 business days
- •Async (Loom + email)
Best for: Before fundraising, scaling, or hiring
Project Sprint
One feature build, API integration, MVP module, or migration. Scoped sprint.
- •Production-ready code + docs + deploy
- •2-4 weeks
- •Async (Linear + Loom + GitHub)
Best for: Specific feature or integration
Dev Club
Unlimited dev requests (1 active at a time). Avg 48-72h turnaround. Pause or cancel anytime.
- •Continuous delivery via GitHub PRs
- •Ongoing (monthly)
- •Async (Linear + Loom + Slack/GitHub)
Best for: Continuous product development
🔥 Only 3 of 5 Dev Club spots available. Next price tier: $2,499/mo.
How it works
Subscribe
Choose your plan and pay via Stripe. No contracts. Get access to your Linear board within 24h.
Submit requests
Add tasks to your Linear board — API endpoints, bug fixes, AI features. One active at a time.
Get code
Receive production-ready code via GitHub PRs. Average turnaround: 48-72h. Loom walkthroughs included.
Iterate
Revision? New request? Just update the board. Pause or cancel anytime — your code is always yours.
Tools we use
Why Kactuz® Co.?
| Kactuz® Co. | Freelancer | Agency | Full-time | |
|---|---|---|---|---|
| Monthly cost | $1,999/mo | $3-8K/mo | $10-25K/mo | $8-15K/mo + equity |
| Time to start | 24 hours | 1-2 weeks | 2-4 weeks | 2-4 months |
| Seniority | Senior-level output, always | Varies wildly | Mostly juniors | If you can find one |
| Meetings | Zero (async) | Some | Many | Daily standups |
| Cancel anytime | ✅ | ⚠️ | ❌ | ❌ |
| Code ownership | 100% yours | Usually | Depends | Yes |
Our Stack
Modern, battle-tested TypeScript — end to end.
No PHP. No WordPress. No legacy.
| Layer | Technology |
|---|---|
| Language | TypeScript (end-to-end) |
| Frontend | Next.js / React |
| Backend | Fastify / NestJS / Next.js API Routes |
| ORM | Prisma |
| Database | PostgreSQL / Supabase |
| Auth | Better Auth / Supabase Auth / Clerk |
| AI | OpenAI GPT-4o / Claude / Vercel AI SDK |
| Payments | Stripe |
| Messaging | WhatsApp Business API / Twilio |
| Background Jobs | Trigger.dev / BullMQ |
| Infra | AWS / Vercel / Dokku / Docker |
| CI/CD | GitHub Actions |
What we build
REST & GraphQL APIs
Clean, documented, production-ready endpoints.
AI Features
Chatbots, RAG pipelines, embeddings, AI-powered search.
Payment Integrations
Stripe subscriptions, invoicing, webhooks, multi-currency.
SaaS Backends
Multi-tenant architecture, RBAC, onboarding flows.
Automations
Workflows, cron jobs, webhook handlers, event-driven systems.
Database Architecture
Schema design, migrations, query optimization.
WhatsApp & Messaging
Business API, chatbot flows, notification systems.
MVP Development
From idea to deployed product in 2-4 weeks.
Code Cleanup
Fix what Cursor/Copilot broke. Production-grade refactoring.
Selected work
GovTech Field Platform
Full-stack web app
Delivered in 8 weeks. Market estimate: 4 months. R$95K contract.
Fintech Billing Hub
Multi-tenant billing platform
Recurring billing, invoicing, and tax automation for multiple tenants.
SaaS Scheduling Platform
Booking system + WhatsApp
Full onboarding flow, real-time scheduling, automated WhatsApp reminders.
AI Automation Engine
WhatsApp + AI chatbot
Automated lead qualification, intelligent routing, 24/7 response system.
From the founder
I started Kactuz® Co. because I kept watching great founders waste months and burn runway on unreliable dev partners.
After 7+ years building fintech platforms, SaaS products, AI integrations, and automation systems, a pattern became impossible to ignore: startups weren't failing because the idea was bad. They were failing because they couldn't get reliable backend help fast enough. Freelancers ghosted. Agencies charged $20K/mo for junior devs. Hiring took months.
That's the problem Kactuz® Co. solves.
A dedicated engineering team. Async-first. Fixed price. Production-ready code in 48-72 hours. No meetings, no BS, no surprises.
We own every delivery. Your product is our reputation.
Gustavo Henrique
Founder, Kactuz® Co. · Belo Horizonte, Brazil 🇧🇷
FAQ
Ready to ship faster?
Dev Club — $1,999/mo
Unlimited requests · 48-72h turnaround · Cancel anytime
Only 3 of 5 spots available. Next price tier: $2,499/mo.