Systems thinking
Rust, Linux APIs, zero-cost abstractions, and precise domain modeling for software that remains predictable under pressure.
Systems skills
- Rust
- Linux
- Performance
- Type-driven design
Software engineer · Bordeaux, France
Correct, fast software.
I am Louis Saglio, a software engineer focused on building systems that are correct by construction while staying precise, maintainable, and as fast as possible.
About
Engineering with ownership and direct feedback.
I enjoy teams that value clarity, speed, technical ownership, and low bureaucracy. My work has ranged from financial SaaS products and actuarial tooling to Android apps, ERPs, teaching, and personal experiments around simulations, genetic algorithms, Kotlin, Python, and expert systems.
Expertise
A practical stack for reliable products.
My current focus is the intersection of strong correctness guarantees, efficient runtime behavior, and pragmatic product delivery.
Product engineering
Full-stack delivery across SaaS products, internal admin tools, data import/export workflows, and maintainable web interfaces.
Product skills
- Python
- Django
- PostgreSQL
- htmx
Technical leadership
Guiding technical decisions, reducing debt, mentoring junior developers, and turning product needs into durable implementation patterns.
Leadership skills
- Mentoring
- Architecture
- Workshops
- Ownership
Experience
Selected work.
A selection of professional roles and key outcomes from my career.
Dedomainia · Software Engineer · 2022–2026
Financial and actuarial SaaS products
Maintained and evolved Lisa, a longevity swap management platform; helped design Lisa 2.0 patterns; built account-management tooling; and contributed to Lassi, Lofac, and Alicia with a strong emphasis on performance, data workflows, and delivery quality.
Technologies
- Rust
- Python
- Django
- PostgreSQL
- Docker
- Linux
U'Wine · Software Engineer · 2021–2022
Android modernization
Maintained a wine cellar and e-commerce Android application while refactoring legacy Java code toward Kotlin, MVVM, Coroutines, and contemporary Android practices.
Waycom · Python Developer · 2019–2021
ERP performance and reliability
Improved core ERP pages by optimizing Django ORM usage, cutting load times by a factor of seven, and redesigned error management for clearer operations.
Ynov Informatique · Python Teacher · 2018–2022
Teaching and automated learning
Prepared and delivered Python courses, evaluated data visualization projects, and built educational software using automatically graded programming challenges.
Jestocke.com · Python Developer · 2017–2019
Customer-service tools and ML collaboration
Built internal management tools, redesigned email tracking, and collaborated with LaBRI on a machine learning algorithm for improved pricing suggestions.
Projects & interests
Curiosity beyond client work.
A selection of personal projects and technical explorations driven by curiosity and a desire to understand complex systems.
Physics simulation
A universe simulation powered by Newtonian mechanics, reflecting a taste for models that connect software architecture with scientific thinking.
Python
Games and Kotlin
JVM/Kotlin experiments include a Risk game implementation and neural-network training projects, combining typed design with algorithmic exploration.
Kotlin
Genetic algorithms
Personal repositories include a genetic algorithm engine, neural-network optimization, and compact problem-solving exercises focused on clean, efficient solutions.
Algorithms
Contact
Need robust software with sharp technical ownership?
I am based in Bordeaux, France, and open to conversations around systems, Rust, backend engineering, performance, product architecture, and teams that move quickly without sacrificing quality.