Volodymyr Z.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I’m a seasoned software engineer and DevOps practitioner who loves building fast, reliable systems with Go (and I’m comfortable across other modern languages, too). I’m deep on Linux internals—namespaces, cgroups, KVM—and right at home with containers and virtualization. From day one I favor event-driven, clustered designs so we can scale horizontally early and skip painful rewrites later. I’ve shipped and operated high-performance, zero-trust, mission-critical apps across network security, finance, and blockchain. I care a lot about clean CI/CD, strong observability, and catching bugs and bottlenecks before users ever feel them. I run Kubernetes in the wild—managed (AWS, Azure) and self-managed—and I’ve used Docker Swarm when it fits. I thrive in remote-first, multinational teams and I’ve led them with a calm, transparent style (Scrum/Agile). I’m very customer-centric: at Skalex I worked directly with clients, flew on-site, and tailored the core product quickly to keep them happy. I love sharing what I learn. I’m writing A Practical Guide to Building, Profiling, and Troubleshooting High-Performance, Scalable Go Applications on Linux. And I’m always learning—right now it’s AI, IoT, and robotics. If we work together, you’ll get a pragmatic builder, a thoughtful teammate, and someone who genuinely cares about users.