Tech Lead · Fullstack Engineer · Rio de Janeiro, Brazil

Marcus Cartágenes.

Tech Lead and fullstack engineer building products that scale — from mobile apps to the cloud that runs them. Music lover on the side.

Swipe across the strings

01 Intro

Marcus Cartágenes music lover 🎧
Shipping code for
12+ years
Based in
Rio de Janeiro, Brazil
Currently at
ShrEDIT

Over a decade shipping software end to end: frontend, backend and the infrastructure underneath. At Globo.com I helped deliver content to millions of people at the same time with serverless, event-driven and realtime systems. Today I lead engineering at ShrEDIT, from product conception to mobile development and the whole cloud stack — with AI built into both the product and the way we work.

I care about teams moving in sync toward a common goal, and about software that stays fast, observable and reliable as it grows.

02 Tracklist

Every gig so far.

Full resume
  1. 01

    ShrEDIT Now playing

    Tech Lead

    Leading engineering end to end — from shaping the product to shipping the mobile app and owning the infrastructure behind it.

    • Part of product conception, turning ideas into features from discovery to release
    • Leading mobile development with React Native and Expo
    • Owning the entire cloud infrastructure on GCP and AWS: Docker, Kubernetes, scalability and reliability
    • Observability from day one: metrics, tracing and alerting with Grafana, Prometheus, OpenTelemetry and Sentry
    • Shipping AI-powered features: generated teleprompter scripts and performance insights on users' videos, built with Claude, OpenAI and Gemini on Vertex AI
    • Leading AI adoption across the team: AI-assisted development with Claude Code, Codex and Cursor, plus MCP servers and agents automating our workflows
    Oct 2024 – Present 2y
  2. 02

    Globo.com

    Software Engineer · Mid-level → Specialist

    Frontend, backend and infrastructure for Brazil's largest media portal, delivering content to millions of people at the same time.

    • Serverless infrastructure: event-driven architectures, messaging, FaaS and DBaaS
    • Realtime systems serving live content to millions of concurrent users
    • Microfrontends architecture
    • SEO optimizations
    • Performance tuned for low-end devices and slow networks
    • Frontend with JavaScript and Go (WebAssembly)
    Jun 2018 – Sep 2024 6y 3m
  3. 03

    Universidade Ceuma

    Fullstack Developer · IT Center (NTI)

    Where my career took shape: building the software behind an entire university — the systems students, faculty and staff relied on every day, from enrollment to finance.

    • Java backends and REST APIs powering the university's core academic and administrative systems
    • Solving real education problems, integrating different ecosystems across the whole institution
    • Web apps with React and Angular
    • Native Android apps with Kotlin
    • Deploy pipelines and CI with Jenkins and Ansible
    Jun 2016 – Jun 2018 2y
  4. 04

    Frade Tecnologia

    Fullstack Development

    Application developer for home automation and security systems with biometric authentication, remote communication and management with Java and C.

    Apr 2015 – Feb 2016 10m
  5. 05

    Ostensiva Segurança

    Backend Development

    Backend development with the Java environment (SE & EE), integration interfaces for external applications using REST. Hybrid mobile development using Ionic and NativeScript.

    Mar 2014 – Feb 2015 11m

03 Gear

What's on my pedalboard.

  • Go ✦
  • TypeScript ✦
  • React ✦
  • React Native ✦
  • Expo ✦
  • Claude ✦
  • AI Agents ✦
  • Kubernetes ✦
  • GCP ✦
  • AWS ✦
  • Docker ✦
  • Serverless ✦
  • Node.js ✦
  • Microfrontends ✦
  • Java ✦
  • Kotlin ✦
  • WebAssembly ✦
  • Event-driven ✦
  • MCP ✦
  • Vertex AI ✦
  • PostgreSQL ✦
  • MongoDB ✦
  • Redis ✦
  • Grafana ✦
  • OpenTelemetry ✦
  • Prometheus ✦
  • Sentry ✦
  • GitLab CI ✦

01 / Leadership & Product

  • Tech leadership: guiding architecture, technical decisions and the team's delivery
  • Product conception: from discovery and scoping to release
  • Agile: SCRUM and XP — events, tools and practices
  • Quality first: unit, acceptance, e2e and load testing

02 / AI Engineering

  • AI in the product: LLM-powered script generation and video performance insights with Claude, OpenAI and Gemini (Vertex AI)
  • AI-assisted development: Claude Code, Codex, Cursor and Copilot for coding, review, refactoring and debugging
  • Team adoption: defining AI workflows, tooling and best practices for the whole team
  • Automation: MCP servers and AI agents in CI/CD and day-to-day operations

03 / Cloud & Infrastructure

  • Cloud computing: GCP (primary) and AWS, owning infrastructure end to end
  • Docker and Kubernetes: containerized workloads, scalability and reliability
  • Serverless: event-driven architectures, messaging, FaaS and DBaaS
  • Observability: metrics, tracing and alerting with Grafana, Prometheus, OpenTelemetry, Cloud Trace, Sentry and PostHog
  • CI/CD: GitLab CI, Jenkins and Ansible

04 / Backend

  • Go, Node.js, Java and Kotlin (Spring)
  • Realtime systems for millions of concurrent users
  • APIs and integrations between different ecosystems
  • NoSQL / SQL: Redis, Cassandra, MongoDB, Postgres, MySQL

05 / Frontend & Mobile

  • React, React Native and Expo: web and mobile apps
  • Microfrontends architecture
  • Performance for low-end devices and slow networks, PWA
  • SEO: structured data, standards and best practices
  • Go (WebAssembly) on the frontend

Minor experience with Python and Ruby.

04 B-sides

Rarities & deep cuts.

Education

  • Bachelor in Information Systems — Uniceuma, 2018

Publications

  • Software for the purpose of promoting fine motor skills of autistic children aged 4–6 through playful and competitive activities. Computer on the Beach, 2016.

Awards

  • Application aimed at people with food intolerances (lactose, gluten…) to find places to eat more easily. Second prize at Startup Weekend 2017 — São Luís, Maranhão, Brazil.

05 Encore

Let's make
some noise.