Romain Marino

Profile

An engineer who loves building things — turning a blank page into something useful, thoughtful, and alive. Three years of software engineering, DevOps and cloud architecture on payment platforms, after four and a half years of full-stack web development.

Experience

Software Engineer

Worldline — Seclin, France

Jan 2023 – Dec 2025

Built merchant and transaction services: ad delivery, receipt digitalisation, payment-terminal (POS) sync
Ran high-volume systems (up to 3,000 req/s, 99.99% availability target) on multi-region AWS
Backend services in Kotlin (Ktor) and Rust for performance-critical components
Terraform, containerised deployments, Grafana / OpenTelemetry observability and distributed tracing

Full-stack Developer

APIZR — Lille, France

Jul 2018 – Jan 2023

APIs, POCs and automation for about fifteen retail clients’ digital transition
SaaS product (front & back) to integrate and monitor client APIs
ELK monitoring and GCP (GKE) infrastructure to host and scale services
Guided about ten retail clients from needs analysis to production

IoT Developer

GreenMinded — Lille, France

2017 – 2018

Application & web development and embedded-system prototyping

Education

Master’s degree, Computer Science

FGES

2019 – 2021

Licence STS, Informatique

CNAM

2018 – 2019

BTS SIO — option SLAM

EFFICOM Lille

2016 – 2018

Selected Projects

Undosus undosus.com

Music-training web apps (rhythm, tempo, sight-reading, ear training), each a single static file with no framework. Installable, bilingual, offline.

Mealbox mealbox.undosus.com

Recipe manager, meal planner and shopping list as a PWA, with no account or server. Recipe import from ~24 sites, photo OCR.

Game jams nahalu.itch.io

Three game-jam titles built in Godot with a small team (Puppets Runner, Landlord, Alien Abduction), playable in the browser.