Ranieri Althoff

Senior Frontend Engineer · Stockholm, Sweden

Software Engineer with 8+ years of experience in scalable web development, secure systems, and cross-functional collaboration. Passionate about impactful software and open source.

About

I'm a software engineer based in Stockholm, currently building internationalized experiences at Volvo Cars. I care about thoughtful interfaces, healthy developer experience, and software that respects the people using it. My background spans front-end product work, low-level systems, and applied cryptography.

Skills

Languages
TypeScript, JavaScript, C++, Python
Frontend & mobile
React (Next.js), Svelte (SvelteKit), React Native
Backend
Express, FastAPI, REST, GraphQL
Tooling & build systems
Vite, Webpack, CMake, Yarn, pnpm
DevOps & infrastructure
Docker, GitHub Actions (CI/CD), Linux (systemd), Flatpak

Languages

Portuguese
Native
English
Fluent
Spanish
Elementary

Experience

Senior Frontend Engineer · Volvo Cars

2022 —

Stockholm, Sweden

  • Developed and maintained an internationalized B2B portal with dynamic content per market.
  • Built internal tooling, automated dependency management and patched vulnerabilities.
  • Streamlined CI/CD pipelines (Azure DevOps, GitHub Actions), reducing friction across teams.
  • Standardized processes to reduce maintenance overhead and improve focus on product delivery.
  • React
  • Next.js
  • TypeScript
  • Azure DevOps
  • GitHub Actions

Software Engineer · Klarna

2021 — 2022

Stockholm, Sweden

  • Contributed to new product features within Klarna's app ecosystem.
  • Built scalable services with responsive front ends using React Native and Node.js.
  • Implemented CI/CD pipelines and automated testing for high quality and reliability.
  • React Native
  • Node.js
  • TypeScript

Software Engineer · Doctype

2017 — 2021

Norrköping, Sweden

  • Led product development from concept to production for first-line clients.
  • Developed modular front-end applications and high-performance back-end systems.
  • Designed and optimized algorithms tailored to client-specific needs.
  • Implemented web scraping solutions to collect data from sources without official APIs.
  • React
  • Next.js
  • Redux
  • TypeScript
  • Go
  • Tailwind

Software Engineer (Internship) · Khomp

2015 — 2016

Florianópolis, Brazil

  • Worked on real-time software for embedded systems in telecom hardware.
  • Contributed to task scheduling, resource management, and hardware integration.
  • C++
  • JavaScript
  • Cryptography

Programmer (Scholarship) · Computer Security Laboratory

2015

Florianópolis, Brazil

  • Developed security libraries using hashing, encryption, and public key infrastructure.
  • Supported research in secure communication and digital certification.
  • C++
  • Cryptography

Education

B.Sc. Computer Science

2013 — 2018

Federal University of Santa Catarina

Thesis: implementation of a secure remote voting system.

Technician in Information Technology

2010 — 2012

Federal Institute of Santa Catarina

Projects

Stars, forks and language pulled from GitHub