Maksym – Python, React, Typescript

Real-money sports betting and live-betting platform operating across global markets, including customer-facing betting interfaces, an operator/back-office dashboard, and physical retail operations.

• Built sportsbook UI, live-betting flows, and a real-money operator dashboard from scratch;
• Developed desktop and POS applications with Electron.js, using Zustand, React Query, and AG Grid for client state, server state, and high-density market data;
• Engineered a front-end caching and merge layer to reconcile real-time Server-Sent Events (SSE) with local state without flicker, lag, or out-of-order rendering;
• Maintained responsive UI performance while processing 200+ events per second across hundreds of concurrent users and 150+ markets;
• Implemented front-end validation and collision-avoidance logic to prevent bets on expired or unavailable markets, events, and odds;
• Built Electron-based cashier and POS workflows with offline-tolerant transaction logging, receipt printing, and shift reconciliation for physical retail locations worldwide.

US-based web hosting and cloud services provider offering hosting, domain, and infrastructure solutions for small and medium-sized businesses and digital customers.

• Worked on the customer-facing Control Panel in a microfrontend and microservices environment, delivering features across React, TypeScript, Node.js, Python, AWS, and AI/LLM workflows;
• Owned end-to-end the OpenTelemetry rollout from zero and instrumented 20+ microfrontends and 25+ microservices;
• Integrated DataDog for traces, metrics, logs, and session replay;
• Built an AI Business Advisor with a Python data-ingestion microservice indexing internal docs, Zendesk, websites, and YouTube transcripts into vector storage with automated refresh and SSE streaming;
• Delivered an AI Business Planner with LangChain nodes for multi-step validation, business analysis, and structured plan generation, plus PDF export;
• Shipped an AI Website Builder and owned critical AWS Lambda functions for staging and production deployments;
• Integrated the Control Panel domain selector and orchestrated model ensembles;
• Built an AI Search Bar so users could describe an action in natural language and jump to the relevant Control Panel feature;
• Improved the Domains Dashboard, simplified dedicated-server provisioning from 7 steps to 2, and built reusable UI components and CPU/RAM/storage utilization indicators.

UAE-based AI-powered EdTech mobile platform designed to strengthen parent–child relationships through guided activities, personalized recommendations, and AI-generated stories.

• Built full-stack and mobile functionality using Flutter, Dart, Node.js, Python, React, Next.js, OpenAI, and a vector database;
• Implemented semantic activity search by converting activities into embeddings and exposing backend endpoints to retrieve the most relevant activities per query;
• Built an automated activity-processing pipeline that ingested recorded videos, generated descriptions, created embeddings, and indexed new activities for semantic discovery;
• Developed AI storytelling workflows generating coordinated stories, images, text, and audio as a complete interactive experience for children;
• Migrated 200+ activities and user records from a legacy CRM format to a new structure with E2E tests and A/B validation with zero data loss.

Technology company developing Ukrainian government digital services and citizen-facing solutions within the Diia ecosystem.

• Worked as a frontend-focused Full-Stack Engineer on regulated public-sector workflows for the timber industry;
• Coordinated frontend delivery within a 3–4 developer team, translating regulated service requirements into citizen- and business-facing interfaces;
• Built E-Drova, a government-secured timber marketplace connecting Ukrainian timber companies with customers;
• Developed E-Certificate frontend workflows for issuing logging and harvesting permits;
• Created a reusable private NPM UI component library aligned with government UX and accessibility requirements, reused across multiple public-service projects;
• Integrated frontend applications with government backend services, registries, and authentication mechanisms within regulated public infrastructure.