Custom SoftwareDevelopment
ERPs, SaaS, mobile apps, complex web systems and integrations. Scalable architecture, your code, zero lock-in — delivered by a team operating in production for over a decade.
What we build
Full-stack coverage: from high-load back-end to mobile app on the store, from internal CRM to ERP integration.
ERPs & business systems
Custom ERPs, CRMs, dashboards, BI, approval workflows, finance, HR, inventory and operations.
Complex web systems
Multi-tenant SaaS platforms, portals, gated areas, marketplaces and B2B software with dense business rules.
Mobile apps (iOS & Android)
React Native, Flutter or native. Stores publication under your company's name, push notifications and offline mode.
Tailored e-commerce
Stores with local tax rules, ERP integration, marketplace, shipping, payment and antifraud.
APIs & integrations
REST/GraphQL APIs, webhooks, integration with ERPs, CRMs, gateways, marketing platforms and SaaS tools.
Automation & AI
Bots, AI agents (Claude, GPT, Gemini), RPA, document processing and workflows on n8n and Make.
High-conversion landing pages
Pages optimized for Google Ads and Meta Ads with server-side tracking (GTM + CAPI) and native A/B testing.
SaaS & digital products
From MVP to mature product: recurring billing, multi-tenant, metrics, onboarding, analytics and scalable infrastructure.
Academic management systems
SMS, LMS, e-learning platforms with Moodle integration, certificates, enrollment and tuition control.
Tech stack
Modern and mature tools, chosen by problem fit — not by trend.
Back-end
- Node.js (NestJS, Fastify)
- PHP (Laravel, Symfony)
- Python (FastAPI, Django)
- Go
- .NET / C#
Front-end
- Next.js / React
- Vue / Nuxt
- Astro
- Svelte / SvelteKit
- TypeScript
Mobile
- React Native
- Flutter
- Swift (native iOS)
- Kotlin (native Android)
- Capacitor / Ionic
Data & infra
- PostgreSQL, MySQL, MariaDB
- MongoDB, Redis
- AWS, Cloudflare, Hetzner
- Docker, Kubernetes
- Vercel, Railway, GCP
AI & integrations
- Claude, GPT, Gemini
- n8n, Make, Zapier
- Webhooks, REST, GraphQL
- Stripe, ASAAS, Pagar.me
- Meta API, Google APIs
How we work
Lean process with weekly deliveries and full client visibility.
Diagnosis (1 week)
Discovery meeting to understand the real problem, flows, integrations and priorities. Detailed proposal in up to 5 business days.
Discovery & scope
Wireframes, architecture diagram, data modeling and clear MVP definition. You approve before a line of code.
Weekly sprints
Delivery every 1-2 weeks with live demo. You follow the backlog on Trello/Linear and talk to whoever codes it.
Tests & QA
Automated tests, OWASP security review, performance validation and accessibility audit.
Deploy & go-live
Provisioned infra (AWS, Cloudflare, Vercel), CI/CD, monitoring (Sentry, Grafana) and domains live.
Ongoing support
Optional monthly SLA for fixes, evolutions, 24/7 monitoring and support.
Why choose Agathas
15+ years delivering in production. No fine print, no hidden outsourcing.
Architecture first
Justified technical decisions — never trend-chasing frameworks.
Senior team
No opaque subcontracting. Whoever codes is who you talk to on WhatsApp.
Zero lock-in
Code delivered to your GitHub. Infra on your AWS/Cloudflare. You can leave anytime.
Weekly live demo
You see the system grow weekly — no end-of-project surprises.
Serious security
OWASP Top 10 covered, audited dependencies, managed secrets, LGPD/GDPR applied from day one.
Native observability
Structured logs, metrics, traces and alerts.
Who we work with
Established SMBs, scaleups, startups with traction and companies that need robust technology — not showcase.
Industry & operations
Systems connecting shop floor, ERP, BI and sales flows.
Education & e-learning
Moodle platforms, SMS, certificates, tuition control, branded mobile apps.
Retail & e-commerce
Sites with local tax rules, marketplace integration, ERP, shipping, antifraud.
Agencies & marketing
Internal platforms, landing pages, lead automation and campaign dashboards.
Health & legal
Systems with LGPD applied, electronic records, scheduling and legal CRM.
SaaS & startups
MVP in 6-12 weeks, recurring billing, multi-tenant, product metrics, scalable infra.
Frequently asked questions
How much does a project cost?
How long does it take?
Do you build in-house or outsource?
Do I own the code?
Do you maintain the system?
Do you serve clients outside Brazil?
Let's talk about your project?
Free 1-hour diagnosis. You leave the meeting with scope, deadline and investment estimated — no commitment.