Software engineer, Ruby on Rails & Hotwire.
Senior software engineer, 15+ years of experience. I build complete solutions — from the Rails / Hotwire backend to native iOS & Android mobile — down to self-hosting, DevOps and shipping to production.
Latest articles
NVIDIA DKMS Fails on Proxmox Kernel 7.0 — And How to Fix It
If you run a Proxmox VE node with an NVIDIA GPU and recently ran apt full-upgrade, there's a good chance your system is now in a broken state. The new...
ONCE by 37signals: Self-Hosting Without the DevOps Tax
Every month, the SaaS invoice pile grows a little taller. Slack, Notion, Linear, Loom — individually reasonable, collectively brutal. At some point the math...
GitButler and the Evolution of Version Control
A Practitioner’s Perspective on AI-Era Workflows GitButler recently raised $17M with a simple but ambitious idea: rethink version control for the era of...
Projects
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Where I've built
Testimonials
Pierre is probably the most flexible and polyvalent engineer I encounteer. He's a true fullstack engineer since he has a solid knowledge in native development, frontend development, backend develop and dev-ops. And in the case you ask him to do something he never did, he always find an elegant way to get it done. He's also a fantastic human being with whom discussion is easy and pleasant. If you're looking for a founding engineer or a senio fullstack engineer with a strong experience, this is definetly the profile you need.
Pierre spent four years at Heloa as a Senior Developer. He played a significant role in building our product in a startup environment, where speed, adaptability, execution, and strong security standards are all critical (especially in healthcare). Versatile and hands-on, he consistently delivered quickly and effectively. Thank you for your contribution, and I wish you all the best in what’s next.
Pierre is an outstanding person. As an ops, he'll be your go-to person to ensure everything runs smoothly. In regular product-development context, he's proven to be more than a regular senior, providing better solutions than the originally designed through proper communication. The skillset Pierre possesses is not far from the web swiss army knife, representing a proper Full stack knowledge. Ultimately, if it's not a topic he's directly comfortable with, he'll figure it as he goes and get it done regardless. Humanly, he's a fantastic person with whom to work with day to day, asking the right questions and capable of adapting to a changing perspective or organization's direction.
I highly recommend Pierre as a Ruby Developer. I had the privilege of managing him, and he consistently delivered great results, showcasing a strong expertise in Ruby and software architecture. Pierre is a dedicated and collaborative team player with excellent problem-solving skills, making him an asset to any organization.
I had the pleasure to hire and work with Pierre while working on Malo. Pierre is a great developer with many areas of expertise: Ruby on Rails / Mobile development (Android & iOS) / DevOps. He was able to quickly take a lot of subjects out of my plate, and perform various migrations (React Native => Turbo Native, AWS => Scalingo) and improvements on our platform, while keeping the systems fully operational. He also has good communication skills and is able to organize, review, and deliver work while working with, and supervising, different team members. And most importantly, he is a nice person to work with, and I would definitely recommend him for any project.
Au-delà de ses compétences techniques, c'est une personne toujours à l'écoute des autres et qui sait se rendre disponible. Passionné par son travail, c'est un développeur qui apporte dans son équipe de belles qualités humaines, en plus de son expertise technique. Travailler avec Pierre a été un plaisir et un honneur, je lui souhaite le meilleur pour la suite !
A Rails, Hotwire or mobile project in mind?
Let's talk. I'm available for freelance work, technical consulting and team support.
qStudio
May 2025 — Present HeloaA back-office platform for building and managing medical questionnaires with conditional logic, rule-based decision trees, and flow-based workflows for pediatric health assessments.
Heloa (Backend)
Mar 2022 — Present MaloA mobile-first health tracking app for parents to monitor their children's development through personalized medical questionnaires, content recommendations, and professional health advice.
Heloa (Android)
Mar 2022 — Present MaloA hybrid Android app built on Hotwire/Turbo that wraps a Rails web application, bridging native features like subscriptions, push notifications, Google Sign-In, and file downloads into the web experience.
Heloa (iOS)
Mar 2022 — Present MaloA hybrid iOS app that wraps a web-based parenting platform using Hotwire/Turbo Native, with native integrations for authentication, subscriptions, push notifications, widgets, and analytics.
Decision engine for sports bettors (oddscore.app). End-to-end: product, backend, PWA, infrastructure, deployment. With Pierre Bouas.
IC Ruby/Rails: pub/sub notifications for Apple/Google in-app purchases, Turbo Navigator, self-hosted monitoring (Grafana, Prometheus, Sentry), Elasticsearch content recommendations, Kamal deployments.
Technical lead of the Malo squad alongside the CTO: product security, API & mobile releases, from-scratch rewrite of the Android/iOS apps in Turbo Native.
Web & mobile application development (GESTLEASE ING, STARCRANE). Rails, PostgreSQL, AWS SES/S3, Scalingo, Heroku.
Messaging team: implementing features on a Rails application and Node.js microservices.
Rails backend for a platform connecting brands, influencers and consumers. Android app, GraphQL, AWS, ops (unix/aws).
Lead developer of the Genero Android client (since 2014). Owned product quality (Jenkins, JUnit, Espresso) and integration.
Getting started with Ruby on Rails and agile methods (eXtreme Programming, Scrum), continuous integration platform and systems administration.
Pierre FILSTROFF
I'm Pierre, a senior software engineer based in Strasbourg. With over 15 years of experience, I specialize in Ruby on Rails and Hotwire, with deep expertise in native Android and iOS mobile development.
I like simple stacks that last: Rails, Hotwire, a bit of well-written SQL, and infrastructure I control end to end. Self-hosting and DevOps are part of my daily routine.
When I'm not writing code, I write articles about what I learn — usually concrete field reports rather than theory.