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Backend Developer · Barcelona, Spain

Rubén
Peñaranda

I build scalable backends in Go & PHP.

Backend engineer with 4+ years designing high-performance microservices and cloud infrastructure for high-traffic platforms — currently powering the backend behind Mytheresa.

4+
Years experience
3
Companies
100%
Backend focused
View my workDownload CV
Portrait of Rubén Peñaranda
GoPHP
ruben@backend

01 — About

Backend is where I live

I'm a backend developer with 4+ years of experience designing and shipping scalable, high-performance systems. My core stack is Go and PHP, where I build microservices and APIs that stay fast and reliable under heavy, real-world traffic.

I work across the whole backend lifecycle — from clean, well-tested domain code (Clean Architecture, TDD/BDD) to cloud infrastructure and deployments on Kubernetes, Helm, and AWS. Today I'm part of the engineering team behind Mytheresa, one of the world's leading luxury-fashion e-commerce platforms.

I care about reliability, maintainability, and continuously sharpening my craft — and I'm always happy to dig into a hard scaling problem.

02 — Skills

My tech stack

01Languages

  • Go
  • PHP
  • C#
  • TypeScript
  • JavaScript
  • SQL

02Frameworks

  • Symfony
  • Laravel
  • React
  • Redux

03Cloud & DevOps

  • Kubernetes
  • Helm
  • AWS
  • Docker

04Databases

  • PostgreSQL
  • MySQL
  • MongoDB

05Architecture & Practices

  • Microservices
  • Clean Architecture
  • REST APIs
  • TDD / BDD
  • Sentry
  • Agile (Scrum / Kanban)

03 — Experience

Where I've worked

  1. Backend Developer · LuxExperience

    Current

    Feb 2025 – Present

    Barcelona, Spain · Hybrid

    • Design and build high-performance microservices in Go, integrated with a large-scale Symfony ecosystem.
    • Orchestrate cloud infrastructure and deployments with Kubernetes, Helm, and AWS.
    • Optimize the architecture of a high-traffic luxury-fashion e-commerce platform for reliability and scalability.

  2. Junior Backend Developer · adnovation

    Apr 2023 – Feb 2025

    Barcelona, Spain · Hybrid

    • Built scalable web solutions with modern PHP and Symfony, handling complex payment flows and REST APIs.
    • Applied Clean Architecture principles, ensuring quality through automated TDD/BDD and error monitoring with Sentry.
    • Maintained data consistency across SQL and NoSQL (MongoDB) databases in an Agile (Scrum/Kanban) environment.

  3. Intern Full-Stack Developer · T-Innova Ingeniería Aplicada, S.A.

    Mar 2022 – Mar 2023

    Castelldefels, Spain

    • Engineered a comprehensive BackOffice web application using Laravel and React.js/Redux.
    • Maintained and integrated internal systems (Intranet, Sports Center Management) using C#, PHP, and front-end technologies.
    • Tuned SQL database performance via stored procedures and handled direct client technical requirements.

Education

CEFP Núria — Web Application Development (Higher Vocational Degree)

2021 – 2023

04 — Projects

Things I've built

portfolio

Static personal portfolio made with Astro.js

Astro

macrolift

The definitive gym + nutrition app

TypeScript

macrolift-api

The API for the definitive gym + nutrition app

Go

focus-police

I am watching you :)

TypeScript

terafight-api

Best MMA stats API of my home

Go

terafight

Best MMA stats website of my home

TypeScript
See all repositories on GitHub

05 — Contact

Let's build something

Looking for a backend engineer for your team or project? I'm always happy to talk about Go, PHP, and scalable systems.

rubenpenaranda21@gmail.com

Barcelona, Spain