Hello there! 👋
Julien Montagut
Making computers do cool things, fast. âš¡

About Me
Senior software engineer with a taste for performance, beautiful code, and distributed systems. Currently exploring Rust, tinkering with CLI tools, and occasionally debating the perfect keyboard layout.
With over 12 years of experience across fintech and AR/VR, I'm passionate about building complex systems and creating tools that make developers' lives easier.
Skills & Expertise
Languages
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Rust
Systems programming & CLI tools
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C#
Backend & Cloud Native
Frameworks
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.NET
Enterprise & Microservices
Tools
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Nix
System Configuration
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Neovim
Text Editing & IDE
DevOps
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Docker
Containerization
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Kubernetes
Container Orchestration
Work Experience
Senior Backend Developer
Betclic
2022-2023
Bordeaux, France 🇫🇷
Led performance optimization initiatives for the sports betting platform:
- Reduced end-to-end system latency from 8s to 2s
- Developed microservices using C# .NET 7/8
- Implemented distributed architecture with MongoDB, Kafka, Redis, and gRPC
- Managed deployments using Jenkins and Terraform
- Set up monitoring and logging with Datadog and AWS
Senior Software Engineer
Dekra
2021-2022
Bordeaux, France 🇫🇷
Architected and developed the new vehicle inspection platform:
- Led backend development using .NET and C#
- Designed distributed architecture with MongoDB and Azure Service Bus
- Implemented performance testing suite using k6
- Promoted TDD and continuous delivery practices
- Collaborated in an Agile/SAFe environment
Lead Developer
CDiscount
2020-2021
Bordeaux, France 🇫🇷
Led the development of a live-shopping platform:
- Managed video integration on product pages with performance optimization
- Implemented authentication using Keycloak
- Led technical team and provided mentorship
- Conducted performance testing with Gatling
- Facilitated Agile ceremonies and technical planning
Senior Software Engineer
WIIDII
2019-2020
Bordeaux, France 🇫🇷
Architected and maintained microservices platform:
- Managed 100+ microservices using .NET Core and C#
- Worked with MongoDB, RabbitMQ, and REST APIs
- Orchestrated containers with Apache Mesos
- Implemented monitoring using ELK and Prometheus/Grafana
- Mentored new developers and promoted DDD practices
CTO
Clezer
2017-2019
Bordeaux, France 🇫🇷
Led technical vision for a fintech startup:
- Developed MVP for group payment card platform
- Built web app with React and mobile app with React Native
- Created backend services using TypeScript and NodeJS
- Managed infrastructure on Google Cloud Platform
- Led development team and handled technical recruitment
Technical Lead
RE'FLEKT
2015-2017
Munich, Germany 🇩🇪
Led AR/VR development for industry clients:
- Created AR applications for clients like Audi, Porsche, BMW
- Developed iOS applications in Objective-C
- Built AR applications using Unity Engine and C#
- Managed international development team
- Conducted technical workshops in German
Featured Projects
dotfiles
Personal dotfiles for macOS, featuring a comprehensive Nix-based system configuration. Includes development environment setup and custom configurations.
Explore More Projects
Discover more of my projects, including experiments, tools, and open-source contributions. From system utilities to web applications, explore the complete collection.
Get In Touch
I'm always interested in hearing about new opportunities, whether it's a job opportunity, a collaboration, or just a friendly chat about technology.
Say Hello