Sergii Safonov
Technical Lead at mono
Ukraine
Summary
👤
Senior🎓
Top SchoolSergii Safonov is a technical lead based in Germany with 20+ years of hands-on software experience and a decade in senior roles delivering robust fintech and payments platforms. He currently leads the Acquiring Stream at mono, focusing on quality, reliability and security for high-throughput financial systems, and previously shaped core fintech infrastructure at Solidgate using Go, Postgres and message platforms. His background spans low-level embedded C for POS terminals through Delphi/C# 3D graphics to modern Node.js and TypeScript microservices, giving him rare cross-domain depth from hardware to cloud. Sergii excels at building product creation processes, CI/CD and developer workflows that scale teams and reduce risk, having led teams of 10–20 and run end-to-end architecture decisions. He prefers fast-paced, feedback-driven products with large user bases and brings a pragmatic penchant for optimizing for observability and operational resilience that isn’t always visible on resumes. Trained as an electronics engineer, he combines systems-level thinking with practical delivery across fintech, crypto, gaming and industrial domains.
10 years of coding experience
19 years of employment as a software developer
Igor Sikorsky Kyiv Polytechnic Institute
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (50)
protocol-buffers9
event-sourcing9
cqrs9
joi9
message-queue9
dm9
serialization9
rpc9
rabbitmq9
protobuf9
stream9
jq8
message-bus8
kafka8
protoc8
Programming languages (6)
Github contributions (5)
DragFAQ/JavaRush2
Feb 2017 - Jun 2017
Contributions:166 pushes, 1 branch in 4 months
DragFAQ/koa-joi-swagger-ts
Oct 2018 - Oct 2019
koa-joi-swagger router on typescript
Contributions:46 commits, 1 PR, 46 pushes in 1 year
koajoiroutertypescriptswagger
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