FULL-STACK SYSTEM ENGINEER & SECURITY RESEARCHER — Florianopolis, SC — Brazil — AVAILABLE FOR PROJECTS

We forge digital engines that thrive at the limits of scale.

Mission-critical software engineering, high-throughput financial APIs, traffic contingency architectures, and SaaS platforms forged with defensive and offensive security mindsets.

<50ms

API Latency

99.9%

Uptime

0.00

Bottlenecks

01 / TECHNICAL CAPABILITIES

Services & Solutions

No bloated templates or sluggish page builders. Every line of code is purpose-built to withstand massive traffic spikes with zero downtime.

(01) Payment Gateways, Instant PIX & Crypto

End-to-end payment gateway development: credit card acquiring APIs, real-time instant settlement (PIX/fiat), international payment processing, and crypto rails (USDT) with race-condition immune concurrency control.

(02) SaaS, CRMs & End-to-End Web Systems

Turnkey custom software architectures: multi-tenant SaaS platforms, proprietary CRMs, high-converting e-commerce engines, real-time analytics, and SQL/SQLite databases optimized for high transaction velocity.

(03) Server-Side Tracking & Traffic Analytics

Advanced measurement engineering: Facebook CAPI, TikTok Events API, and Google Enhanced Conversions. Persistent first-party UTM tracking, adblocker-resilient server-side pixels, and sub-second VSL pages.

(04) iGaming & Betting Engines

High-performance engines for casinos, crash games, and sports betting with anti-fraud defense layers and certified provider API integrations.

(05) Automations & WhatsApp API

High-throughput automated bots for abandoned checkout recovery, event-driven webhooks, and deep CRM bidirectional sync.

(06) Infrastructure & Traffic Contingency

Bare-metal and cloud server provisioning, Nginx/Redis performance tuning, forensic traffic cloaking, and resilient ad-platform contingency stacks.

02 / BACKGROUND & EXPERIENCE

Security-first software engineering.

The convergence of high-velocity full-stack engineering and offensive cybersecurity. Code engineered by someone who intimately understands how vulnerabilities are weaponized and neutralized.

Full-Stack System Developer & Security Researcher

ARQUITETURA DE SISTEMAS // APPSEC // BUG BOUNTY

Full-Stack Engineering & Turnkey Systems

Independent software developer and systems engineer based in Florianopolis, SC, designing complete end-to-end architectures: high-traffic web apps, SaaS platforms, internal CRMs, and low-latency REST APIs.

Specialized in multi-currency payment ecosystems (credit card gateways, instant settlement, international fiat, and crypto USDT), alongside deep server-side tracking (Meta CAPI, TikTok, Google Ads) and financial automation.

PHP 8+ Python SQL & SQLite APIs REST Gateways & PIX Cripto (USDT) Tracking Server-Side Linux Ubuntu

Cybersecurity, AppSec & Vulnerability Research

Hands-on penetration testing in authorized environments and vulnerability research focused on OWASP Top 10.

Proven track record of responsible disclosure in large-scale environments — including security findings reported to Meta (WhatsApp), payment processors, and third-party financial platforms.

Engineering advanced traffic intelligence engines with visitor classification powered by behavioral fingerprinting, network heuristics, and machine intelligence.

Web Pentest OWASP Top 10 Meta (WhatsApp) Research Gateways Security Fingerprinting & AI Race Condition Defense

03 / ARCHITECTURE & PHILOSOPHY

Precision engineering. Zero visual noise.

Robust software requires zero superficial gimmicks. We deliver audited, type-safe, low-memory architectures that ensure uninterrupted 24/7 mission-critical availability.

Idempotency & Resilience Event-driven webhooks and queues with smart retries that never duplicate transactions.

Edge Performance Multi-layer Redis caching for sub-millisecond response times under peak concurrency.

Forensic Defense End-to-end payload sanitization, strict boundary defense, and anti-crawler bot mitigation.

Continuous Deployment Strict version control and zero-downtime Linux production deployments.

04 / PRODUCTION STACK

Disciplines & Tools

Battle-tested technologies orchestrated for maximum development velocity and absolute reliability.

Backend & Core Logic

Modern PHP 8.2+ / OOP
Node.js & TypeScript
Python for Automation & AI
RESTful APIs & Webhooks

Databases & Caching

Optimized PostgreSQL & MySQL
Redis In-Memory Caching
RabbitMQ & Filas Assíncronas
Automated Backups & Replication

Infra & Security

Linux Ubuntu / Debian Server
Nginx High Concurrency Tuning
Docker & Containers Isolados
Cloudflare Enterprise WAF

PROJETOS & CONSULTORIA

Ready to build or bulletproof your systems?

Whether you need a custom payment gateway, a scalable multi-tenant SaaS, or an in-depth security audit, start a direct conversation to scope your project.

Request Quote via WhatsApp [email protected] LinkedIn Instagram