Oleh
Voloshyn.
I design and scale distributed systems in Node.js — event-driven, observable, and dependable under real production load.
Backend by craft, lead by responsibility
I build backend systems the way I'd want to inherit them — clear boundaries, predictable performance, and nothing that wakes you at 3 a.m. As Tech Lead at Nice Corp I own the architecture of an event-driven platform: deciding how services talk, where data lives, and how latency stays low while traffic climbs. And I still write code every day — the sharpest architecture calls come from people who ship, not just diagram.
Tools I reach for
A pragmatic Node.js toolkit, chosen per problem — not per hype.
Where I have worked
Lead the architecture of an event-driven microservices platform. Own service design, throughput and latency targets, and mentor a team of engineers toward cleaner, observable systems.
Built high-throughput APIs, event-driven pipelines and search integrations on Node.js, Kafka and PostgreSQL. Grew from feature delivery into system design and cross-team technical ownership.
Developed core service features, REST APIs and background jobs. Deepened expertise in Node.js, databases and server-side architecture fundamentals.
Selected work
Real systems — links connect to live repos and case studies.
Flowscore
Sports analytics mobile app delivering smart football match predictions powered by real-time data. Backend built for high-concurrency live score ingestion, player statistics pipelines and an AI-driven prediction engine.
HavaTV
Ad-free football streaming platform. Backend handles live video delivery, multi-sport match aggregation and real-time push notifications across iOS and Android.
TurboworkCRM
Full-featured CRM for Forex & trading companies — traders, deposits, withdrawals, affiliates and leads on a high-throughput event-driven core.
AISalesman
AI auto-dialing platform for outbound sales teams. Orchestrates AI voice agents across thousands of concurrent campaigns with real-time analytics and funnel reporting.
Brokery
Voice AI sparring platform for sales training. Backend powers live AI calls, a 7-skill scoring engine and multi-language client simulations in real time.
Impact by the numbers
Production figures from systems I have led or built.
What I bring
Let us build something that stays up
Open to Tech Lead and senior backend roles, plus architecture consulting.