Author & founder

Vadim Zhuk

Software architect and founder of Sellbyx, focused on systems where architecture, performance and operational reliability materially affect the business.

VZFounder / CTO / Software Architect

Experience

Engineering judgment shaped by production responsibility.

Vadim has more than 14 years of software engineering experience and five years in CTO roles for companies operating licensed trading and fintech platforms. His work spans end-to-end digital products, Go and distributed backends, real-time systems, cloud infrastructure, databases and search, financial workflows and applied AI.

Expert-Vetted shown on UpworkTop Rated Plus shown on Upwork6,800+ hours completed on Upwork100% Job Success shown on Upwork

Public profile checked July 12, 2026. Upwork metrics may change.

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Areas of expertise

Products, systems and domains.

End-to-end B2B and B2C product engineering
Fintech and trading platforms
Scalable Go and distributed systems
Cloud, Kubernetes and delivery platforms
Databases, search and data architecture
Voice and applied AI

Publishing standard

How technical claims are published.

Primary technical sources
Explicit assumptions
Measured constraints
Visible publication dates
Corrections and updates

Direct access to the delivery team

Tell us what you need to build, scale or recover.

Discuss a project