Sergio Sebastián
Director Of Security & IT at マネーツリー・Moneytree
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolSergio Sebastián is a Tokyo-based Director of Security & IT with 15 years of experience uniting engineering, security, and product delivery across scale-up fintech environments. At Moneytree he has progressed from core engineer to director-level roles, leading SRE, API, data and professional services teams while driving ISO 27001 initiatives and pragmatic reductions in operational complexity. He blends hands-on technical chops (serverless microservices, AWS, performance tuning) with security-first leadership—socializing security culture, enabling internal teams, and managing risks before incidents occur. A lifelong tinkerer since age eight, he channels curiosity into CTFs, open source, trading bots, and technical content, pairing creative problem-solving with psychological-safety-minded team building. He also advises startups and mentors engineers, bringing a broad perspective that connects technical architecture to product, business strategy, and societal impact.
15 years of coding experience
13 years of employment as a software developer
UPC Universitat Politècnica de Catalunya
Spanish, Catalan, English, Japanese
Stackoverflow
404reputation
251kreached
6answers
5questions
Github Skills (40)
csv8
s3cmd8
monitoring7
backup7
time-series7
command-line-tool6
jenkins6
elasticsearch6
expressapp6
cli6
jenkins-plugin6
prometheus6
documentation-generator6
amazon-s36
rest6
Programming languages (8)
Github contributions (5)
m13/github-org-stats
Apr 2020 - Aug 2024
Script to visualize github repository key information (->json->csv)
Contributions:7 PRs, 5 pushes, 6 branches in 4 years 4 months
visualizecsvjsoncsv-json
m13/calendar2jobcan
Jan 2020 - Jul 2021
Sync Jobcan with Google Calendar or CSV
Contributions:5 reviews, 31 commits, 19 PRs in 1 year 5 months
csv
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