Open to opportunities

Carlos Moreira

@carlosmoreira

Message

I build reliable multi-tenant SaaS and real-time platforms from business-critical operational experience.

Brazil

Message

What I'm looking for

I'm looking to build reliable, production-grade SaaS and real-time platforms where ownership, strong architecture, and business-aware engineering matter. I'm open to remote-first opportunities and relocation.

I've built and operated production SaaS platforms at HESEA Technology using NestJS, Next.js, TypeScript, and PostgreSQL, taking products from discovery through deployment. My work includes EvoNutri, AnestDrive, LocMoto, WellPlatform, and a production clinic-management SaaS.

I design multi-tenant systems with strict isolation, role-based access, and production observability. For EvoNutri, I delivered a white-label healthtech platform with OpenAI, Gemini, and Groq LLaMA fallback; for WellPlatform, I connected live industrial serial-device data to real-time pressure-physics calculations and WebSocket charts.

Previously at Santander F1RST Digital, I built Java and Node.js integration APIs and observability tooling spanning 5,000+ servers. I also mentor junior developers, set code-quality standards, and own architectural decisions across the stack.

Before software, I spent 15+ years leading high-risk offshore cementing operations for SLB across multiple continents. That experience shapes how I build: reliability-first, failure-aware, and grounded in how the business actually operates.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

HESEA Technology

Jan 2024 - Present (2 years 7 months)

Architect and operate multiple production SaaS platforms end-to-end using NestJS, Next.js, TypeScript, and PostgreSQL. Design multi-tenant architectures with strict data isolation and role-based access control, implement CI/CD pipelines, and mentor junior developers.

NestJS Next.js TypeScript PostgreSQL CI CD Docker Caddy Sentry RBAC

Cementing Supervisor / Offshore Engineer

Schlumberger

Jan 2011 - Jan 2025 (14 years)

Led high-risk ultra-deepwater cementing operations across South America, Africa, and Europe. Managed mission-critical equipment and real-time decision-making under pressure with multi-million-dollar daily rig-time stakes.

Offshore Operations Cementing Team Leadership Real Time Decision Making Client Management

Full Stack Engineer

Santander

Jan 2022 - Jan 2024 (2 years)

Built integration APIs using Java 11 and Node.js with AngularJS frontend for enterprise-scale banking infrastructure. Developed distributed observability tooling integrating Dynatrace, Zabbix, and ServiceNow across 5,000+ servers.

Java Node.Js Development AngularJS Dynatrace Zabbix ServiceNow REST APIs Agile

Backend / Full Stack Developer

HESEA Technology

Jan 2020 - Jan 2022 (2 years)

Built scalable REST APIs and refactored legacy systems using PHP, WordPress, and JavaScript. Improved system performance and reliability across multiple SaaS platforms in production.

PHP WordPress JavaScript REST APIs TypeScript