Hello, I'm

Julien REO

Lead Backend Engineer & DevOps

Node.js Cloud Architecture Security FR · EN · ES
Julien REO
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01 — About

Background

Trilingual Lead Backend Engineer (French, English, Spanish) with 10 years of experience building scalable systems across advertising, digital marketing, sports, and video platforms.

I lead backend architecture and DevOps operations, with security integrated into infrastructure design. I favor mature, proven technologies over trend-driven ones, prioritizing scalability, reliability, and maintainability.

My background includes an unusual path: nearly a decade in international business development across Europe, Latin America, and Australia before transitioning into engineering. That experience gave me a strong understanding of how products scale internationally, both technically and operationally.

Name
Julien REO
Age
41 years old
Location
Biarritz, France
Languages
French, English, Spanish
Focus
Backend · DevOps · Security
02 — Expertise

What I do

Backend Engineering

Designing and building scalable APIs, microservices architectures, and data-intensive systems.

Node.js System Design Microservices ETL Data Modeling PostgreSQL

Cloud & DevOps

Building resilient cloud infrastructures with automated deployments and monitoring.

AWS Docker Kubernetes Terraform Ansible Linux

Security

Implementing security best practices across the stack, from secure coding to compliance.

Access Control Secrets Management Infrastructure Hardening Security Audits Monitoring
03 — Journey

Career path

2021 — Present
Lead Backend Engineer
Backend Architecture & DevOps Leadership
Leading backend architecture, large-scale migrations, and platform reliability. Designing cloud infrastructures and integrating security practices into development workflows. Mentoring developers and maintaining high engineering standards.
2017 — 2021
Backend Engineer
Advertising, Digital Marketing & Video Platforms
Built scalable backend systems across diverse industries. Gained deep expertise in Node.js ecosystem, database design, and API architecture.
2010 — 2017
International Business Development
Europe, Latin America & Australia
Led market entries and operations across multiple continents. Built partnerships, managed client acquisition, and developed a deep understanding of how products scale internationally.
04 — Contact

Let's connect

Happy to discuss projects or connect with fellow engineers.

Connect on LinkedIn