001About Me
João Vitor Waldrich

Senior Software Engineer

EU Citizen
Linux Enthusiast
contact@waldrich.lu

I build systems that create real value for the people using them. And I care more about whether it holds up under real load than about how clever the code looks.

What drives me: understanding what the client actually needs to scale into, designing the system to get them there, and closing the gaps before they become the client's problem. The best architectures I've built started as a client's growing pains, not a spec.

Today I'm a Senior Software Engineer at CloudPark, a hardware-enabled SaaS platform for parking management running across 850+ sites in Brazil, promoted from mid-level in half the company's average time. I re-architected the core data service onto serverless infrastructure, cutting compute costs by 94% while migrating 5M+ records with zero data loss. I also architected the company's official Linux distribution, now shipped on every device, cutting configuration errors by 85% and deployment time by 80%, and led the i18n and multi-currency rollout that unlocked 5 international enterprise clients and took the platform to 850+ customers. Before that, I built greenfield clinical microservices for cardiac monitoring at Philips, serving European hospital networks.

Most of my work sits at the intersection of backend engineering and infrastructure security: designing systems, hardening them, and making sure they scale without breaking the bank.

Day-to-day stack: Go, Python, TypeScript, AWS, Linux. Outside of client work, I built Ecclesiam, a free, non-profit app that helps Catholics find nearby parishes and Mass times (Django/GeoDjango, PostGIS).

EU work authorization via Luxembourg, open to remote roles across North America and Europe.

002Languages I Speak
PortugueseNative
EnglishAdvanced
GermanBeginner
003Work Experience
  1. Sep 2025 – Present

    Senior Software Engineer – Technical Reference

    CloudPark

    Hardware-enabled SaaS for parking management, running across 850+ sites.

    • Re-architected the core data service from EC2/MongoDB to serverless Lambda/DynamoDB, cutting compute costs by 94% while migrating 5M+ records with zero data loss.
    • Architected the company's official Debian-based Linux distribution, now shipped on every device, cutting configuration errors by 85% and deployment time by 80%.
    • Led the i18n and multi-currency rollout across six systems, unlocking 5 international enterprise clients and taking the platform to 850+ customers.
    • Implemented per-user ERP-backed SSO and at-rest encryption, replacing legacy shared credentials.
    • Designed an internal credential broker issuing 5-minute TTL STS credentials, following a security audit.
    • Engineered an automated ticketless entry integration handling 400K+ annual transactions.
    Python
    Go
    Django
    Flask
    React
    Angular
    Vue.js
    AWS
    PostgreSQL
    SQLite
    Linux
    CircleCI
  2. Sep 2024 – Sep 2025

    Mid-Level Software Engineer

    CloudPark
    Python
    Go
    Django
    Flask
    React
    Angular
    Vue.js
    AWS
    PostgreSQL
    SQLite
  3. 2023 – 2024

    Analysis and Software Development

    Unicesumar

    Brazilian private university.

    Sorting algorithms, Graphs, Searching algorithms, Software Architecture, Operating Systems, Computer Networks

  4. Jan 2022 – Sep 2024

    Entry-Level Software Engineer

    Philips Clinical Informatics

    Clinical informatics arm of the Dutch health-technology group; systems used by European hospital networks.

    Java
    Spring Boot
    TypeScript
    JavaScript
    Angular
    Oracle
    PL/SQL
    Azure
  5. Aug 2021 – Dec 2021

    Entry-Level Software Engineer

    CloudPark

    Hardware-enabled SaaS for parking management, running across 850+ sites.

    Python
    Go
    Django
    Flask
    React
    Angular
    AWS
    PostgreSQL
  6. Feb 2021 – Aug 2021

    Software Engineer Internship

    Wk Sistemas

    Brazilian ERP software company with 4k+ clients nationwide.

    C++
    C#
    Azure
    Windows Server
  7. 2018 – 2021

    Computer Science – Technical High School

    IFSC – Instituto Federal de Santa Catarina

    Public federal institute of technical education, Santa Catarina.

    Algorithms, Software Architecture, Operating Systems, Computer Networks, Embedded Software Development

004Core Technologies

Languages

Go
Python
TypeScript
JavaScript
Java
C++
C#

Backend

Django
Flask
Spring Boot
Node.js
REST APIs

Frontend

React
Next.js
Angular
Vue.js
Vite
Tailwind CSS

Databases

PostgreSQL
DynamoDB
MongoDB
SQLite
Oracle Database

Cloud & DevOps

AWS
Docker
Linux
CI/CD
Git
CircleCI

Practices

Microservices
Hexagonal Architecture
i18n
Security
OWASP

AI & Machine Learning

AI Agents
Claude Code
RAG
Machine Learning
Prompt Engineering