Sean Duffy
Software Engineer at Millennium
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolSean Duffy is a seasoned full-stack software engineer with 13 years of experience building low-latency, reliable systems for financial services from London. He has a Master of Engineering in Computer Science from the University of York and a track record delivering production-grade APIs, matching engines, post-trade systems and trading UIs at firms including Millennium, GMEX Group and Morgan Stanley. His strengths include GC-free Java for high-throughput services, microservice architectures, comprehensive testing and pragmatic full-stack development in Java and C#. He balances deep backend performance work with user-facing web UI features, having built portfolio order APIs, market simulation/paper-trading integrations and monitoring dashboards. Colleagues would note his early experience with concurrent Go and Python tooling, reflecting a willingness to optimize for scale and memory as well as to learn across languages and domains.
12 years of coding experience
5 years of employment as a software developer
Master of Engineering (MEng), Computer Science, 2:1, Master of Engineering (MEng), Computer Science, 2:1 at University of YorkGCSEs, GCSEs at Broadgreen International SchoolA-Levels, A-Levels at Liverpool Blue Coat School
Stackoverflow
11reputation
3kreached
3answers
2questions
Github Skills (49)
scrape10
scraper10
scraperwiki10
dedicated-server9
dotnet8
plugin7
python7
iis6
powershell6
mercurial6
console-application6
devops6
windows6
teamcity6
flashing5
Programming languages (7)
Github contributions (5)
sean-duffy/sean-duffy.github.io
Feb 2019 - May 2023
Contributions:4 pushes, 1 branch in 4 years 3 months
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