Sergii Biienko
Senior Software Engineer at Auth0
Barcelona, Catalonia, Spain
Summary
🤩
Rockstar🎓
Top SchoolSergii Biienko is a Senior Software Engineer with 11 years of experience designing and delivering high-load, distributed systems and APIs across industries like travel, social, gaming, and data mining. He has driven migrations from monoliths to microservices, advocated event-driven architectures, and improved CI/CD and identity/auth infrastructure at companies such as Typeform and Auth0. Proficient in Go, PHP, Node.js, Python and a variety of data and messaging technologies (MySQL/Postgres/Mongo, Redis, RabbitMQ, AWS SQS/SNS), he combines low-level performance tuning with system-level architectural thinking. Sergii is comfortable leading teams or working independently, bringing a pragmatic application of SOLID, TDD and clean code principles to complex problems. Based in Barcelona, he pairs a Master’s in Applied Mathematics with hands-on experience in observability, machine learning pipelines and integrations, often choosing the simplest effective tool rather than the trendiest one. A fast learner with a track record of upgrading legacy platforms and shipping scalable APIs, he repeatedly turns performance bottlenecks into production wins.
11 years of coding experience
12 years of employment as a software developer
Master of Applied Mathematics, Computer Science, Master of Applied Mathematics, Computer Science at Dnipropetrovs'kij Nacional'nij Universitet
English, Ukrainian, Russian, German, Spanish
Github Skills (52)
authentication10
ws-federation9
idp8
assertion8
expressjs7
hacklang7
identity-provider7
php7
trace7
spid6
type-library6
virtual-machine6
middleware6
testing6
logging5
Programming languages (5)
Github contributions (5)
forrest-ua/auth0-extension-coffee-roulette
Oct 2019 - Nov 2019
Contributions:66 pushes, 1 branch in 4 days
forrest-ua/google-translate
Jan 2015 - Mar 2016
Contributions:5 pushes, 6 tags in 1 year 2 months
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