Marcos Mendes
Marcos Mendes

hi, i'm marcos.

just a guy who really like to know how things works.

with a keep-moving-forward mindset.

a dev who cares about the product and user experience before the stack.

i also really like to improve, and read about communication.

a dev with product engineer mentality ;) i like this term.

no ego, no competition, just trying to be 1% better everyday.

btw, i love bike, deathstranding, and videogames architecture


work

Chatwoot logo

Chatwoot

Senior Software Engineer

  • Refactored mission-critical NestJS API endpoints using clean domain modeling, eliminating race conditions and ensuring 99.9% reliability for 10k+ daily business transactions.
  • Built and evolved frontend features using Vue.js, emphasizing usability, responsiveness, and long-term maintainability.
  • Contributed to omnichannel support capabilities, including centralized inboxes (live chat, WhatsApp, Instagram) and automation workflows used by support teams at scale.
Pluxee logo

Pluxee

Software Engineer

  • Scaled a mission-critical payments platform to handle 1M+ daily transactions by engineering the modernization of legacy components into Java/Spring Boot microservices.
  • Led a frontend team for an enterprise-grade system, owning feature delivery from discovery to production across critical business flows.
  • Implemented and scaled a multi-country frontend architecture with full internationalization support, enabling product expansion beyond legacy use cases.
Merck logo

Merck

Frontend Engineer

  • Engineered a mission-critical animal health platform from discovery to production, streamlining medical history and appointment management for 50+ clinics and 10k+ users.
  • Owned full-cycle feature development across frontend and backend boundaries, from implementation to testing and delivery.
  • Built and maintained scalable frontend foundations (shared components, validations, and project boilerplates) to accelerate development across multiple applications.
upcubo logo

upcubo

Software Developer

  • Built and scaled backend services (Node.js/PHP) for business-critical payment and scheduling systems, ensuring 99.9% uptime for core workflows.
  • Led the full-stack development and successful launch of multiple web and mobile applications (React/React Native), driving the product from initial concept to production.
  • Automated manual operational processes by integrating complex third-party APIs, saving dozens of hours of manual work monthly for internal teams.


projects

Focusly logo
Focusly

Get Things Done, as Planned.

SuperMario.js logo
SuperMario.js

Play super mario in the browser using a PlayStation 5 / Xbox controller.

Screen Size Helper logo
Screen Size Helper

A React Hook utility for identifying and working with screen sizes

Rust Http Server logo
Rust Http Server

Rust http server using Warp. Modular structure for easy scalability and configuration.


moments

Moments and vibes I enjoy along my journey.

14 habits of highly productive developers

One of my favorite books, 14 Habits of Highly Productive Developers

Building

Building 🤓

React Conf

React Conf 🎉

Love this vibe

Love this vibe

My cat being photogenic

My cat being photogenic

Running in the park

Running in the park 👟

Pizza Time

Pizza Time 🍕

My favorite weather

My favorite weather 🥶

Gym

Gym 💪


ʕ⊙ᴥ⊙ʔ Marcos Mendes © 2026