Oleg Savelev

Engineered high-availability user interfaces and real-time monitoring systems for a global Infrastructure-as-a-Service (IaaS) provider.

• •Designed and built traffic control dashboards using React, Next.js, and TypeScript, giving network operators full visibility over global traffic.
• •Integrated WebSockets and telemetry streams to deliver live network updates under 50ms, allowing operators to resolve routing bottlenecks instantly.
• •Prevented UI freezes under heavy traffic spikes by processing telemetry feeds in Web Workers and batching state updates, reducing main-thread CPU load by 35%.
• •Partnered with network engineers to design lightweight API contracts, which reduced average payload size and improved system reliability.
• •Cut page load times by 30% by refactoring data-fetching logic and deploying a shared library of reusable UI components.

Engineered a regional marketplace platform linking physical storefronts with local buyers.

• •Scaled a Node.js and Next.js backend to handle geo-targeted listing searches for 50,000 monthly active users.
• •Built merchant dashboards in React and TypeScript that synced inventory changes via WebSocket connections.
• •Optimized spatial (geographic) database queries using PostGIS and R-Tree indexes, cutting search latency from 2.5s to under 150ms.
• •Integrated Mapbox GL to show nearby businesses on interactive maps, which raised user session times by 50%.
• •Defined technical goals and software architecture to transition the project from proof of concept to a stable commercial launch.

Maintained and updated web applications for a national postal service provider.

• •Created and supported React apps deployed across 1,000 branch offices to process thousands of daily postal transactions.
• •Developed an offline-first architecture for branch terminal applications with local storage buffering and background synchronization, preventing transaction loss during network outages.
• •Compiled shared frontend components and utility libraries, which boosted development velocity for internal tools by 40%.
• •Optimized C# and .NET Core backend services to process high volumes of transaction data and eliminate queue backlogs.
• •Streamlined system troubleshooting by writing detailed runbooks, which halved the average time needed to resolve server incidents.

Developed nationwide government and enterprise systems with high regulatory and reliability requirements.

• •Engineered backend services for the national EGAIS tracking system, optimizing data layers to process 100M+ daily transactions under high regulatory uptime requirements.
• •Built integration layers linking retail point-of-sale systems directly to federal database infrastructure, reducing data synchronization delays to under 2 seconds.
• •Developed qualified digital signature services in C# to automate manual document flows, reducing policy verification errors to zero.
• •Refactored monolithic legacy backend systems into decoupled microservices, lowering server CPU utilization by 25% during peak loads.

Designed and implemented desktop applications for insurance policy management.

• •Created a multi-user WPF desktop application that automated policy lifecycles and reduced average client intake time by 30%.
• •Programmed SQL Server reporting modules and risk calculators, cutting month-end report generation times from days to under 15 minutes.
• •Deployed the application to branch offices, enabling 50+ agents to manage policies with real-time inventory updates.