Billy Vlachos is a software engineer based in Amsterdam with over a decade of hands-on experience building web, back-end, and event-driven systems, currently working at GreenFlux. He has strong .NET expertise and a proven track record modernizing legacy platforms, migrating services to Azure, and implementing DDD/CQRS and event sourcing patterns. Billy has led onboarding and data migration initiatives, designing APIs and tools (like the Limbo app) that cut onboarding time by half and drastically reduced tenant setup coding effort. Comfortable across the stack—C#, TypeScript, Angular/React, SQL—he combines pragmatic engineering with a knack for operationalizing complex integrations (Commercetools, Segment, IdentityServer4). His background ranges from airline operations to clinical hypnotherapy, giving him uncommon strengths in process-driven problem solving and user-focused documentation. He’s a pragmatic, hands-on leader who mentors others while shipping resilient, business-focused software.
9 years of coding experience
14 years of employment as a software developer
European Baccalaureate Basic Skills and Developmental/Remedial Education, European Baccalaureate Basic Skills and Developmental/Remedial Education at Deskio Lykeio Pargas
Certificate Full Stack Web Development, Certificate Full Stack Web Development at Codaisseur
Basic Zumba, Basic Zumba at Zumba
Diploma Clinical Hypnotherapist, Diploma Clinical Hypnotherapist at Akadimia Psychotherapias kai Symvouleftikis (Academy of Psychotherapy and Counselling)
french, very well, english, native, greek, native, italian, medium
This is an OAuth 2.0 and OpenID Connect authentication/authorization provider implemented in node.js
Contributions:57 commits, 4 PRs, 20 pushes in 1 month
openidoidcauthorizationproviderpkce
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