Julien Monnier
Senior Software Engineer, Portfolio Valuations
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolJulien Monnier is a Senior Software Engineer based in London with 14+ years building mission-critical systems for banking and portfolio valuation platforms. He brings deep Java and Scala expertise, full-stack experience at S&P Global on IHSMarkit’s Portfolio Valuation services, and a history of consulting and hands-on roles across major financial institutions. Julien combines production-grade backend engineering with practical DevOps and scripting skills (Node.js, Python) and has contributed to open-source crypto trading infrastructure, improving robustness and cross-platform compatibility. Comfortable translating financial domain complexity into reliable, auditable systems, he also has entrepreneurial experience running his own consultancy.
13 years of coding experience
12 years of employment as a software developer
MSc, MSc at Université de Pau et des Pays de l'AdourBachelor in Economics, two terms exchange program (ERASMUS), Bachelor in Economics, two terms exchange program (ERASMUS) at University of LeedsMSc, MSc at Université Lumière Lyon 2
English, French
Github Skills (9)
javas10
trading-algorithms10
java10
trading-bot10
debug9
refactoring9
algorithm9
debugging9
algorithms9
Programming languages (5)
Github contributions (5)
timolson/cointrader
Aug 2014 - Feb 2015
Coin Trader is a Java-based backend for algorithmically trading cryptocurrencies. It provides data collection and export, complex event processing and triggering, and backtesting - paper trading - live trading.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 commits, 2 PRs, 27 comments in 6 months
Contributions summary:Julien primarily focused on improving the codebase for the cryptocurrency trading backend. Their contributions included fixing Windows-specific batch file syntax issues, and refactoring and updating code, by adding Java override annotations. They added diamond syntax in the Java code where applicable and added missing default cases in switch statements. Several of the commits also changed and updated the code by adding override methods.
fixprotocolcoinbasecomplex-event-processinghuobitrader
jule64/yahearnings
Jun 2012 - Mar 2014
Contributions:23 commits in 1 year 9 months
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