Yurii Soproniuk

End-to-end development of a high-load CS2 skin gambling platform (case opening, battles, upgrades, and other game modes): ~20k daily visitors, ~40k new registrations per month, and ~5M requests per day, with traffic peaks above 400 rps.

• Building product features end to end: interactive game modes, real-time multiplayer over WebSockets, A/B-tested user flows, and admin/CMS tooling
• Integrated 10+ payment and payout providers (crypto, Visa/Mastercard, P2P, and in-game skin deposits) across multiple currencies, with an in-house anti-fraud system working together with the providers' own checks
• Managing 15+ regional domains with their own languages, redirects, and DDoS protection; integrating third-party APIs and bots (Steam, Facebook, Telegram, email platforms, and more)
• Migrated production PostgreSQL from a self-managed VPS to a cloud cluster with zero downtime, using live replication
• Owning infrastructure and observability: Docker Swarm with Traefik, GCP, CI/CD pipelines, Prometheus, Grafana, Loki, and ClickHouse analytics
• Improving platform security: backend audits, vulnerability fixes, log-based incident investigation, and DDoS mitigation

• Developed websites, CRMs, and applications from scratch using NestJS, Strapi, and Next.js
• Designed and implemented scalable architectures and design patterns; deployed solutions using cloud platforms (AWS/GCP) or custom setups (Nginx, Docker)
• Set up CI/CD pipelines for efficient development workflows, utilizing tools such as GCP Cloud Build, Artifact Registry, GitHub Actions, and Docker registry
• Monitored environments and analyzed logs using Amazon Athena, GCP Cloud Monitoring, Prometheus, Loki, and Grafana; integrated analytics setups
• Optimized website performance with CDNs like CloudFront and Vercel, and enhanced server efficiency using GCP load balancers

Throughout my work, I contributed to numerous projects, including: Kyiv IT Cluster, Trinity Car Rental Boutique, Chronicles of Power, BURSAhotel, Wetrade Exchange, Creative States, Enso Investment and many others.

• Developed features for Novyny Live, a high-traffic national news site: article and category pages, live-news updates, and ad and analytics integrations
• Built a shared component library reused across the group's sites (FFU, Gidna, Children Hub) and animated GSAP landing pages from Figma designs
• Brought Core Web Vitals into the green zone (Google's "Good" thresholds) and made multilingual (UA/EN) sites SEO-ready with SSR/SSG, structured data, sitemaps, and hreflang
• Migrated a legacy React 16 SPA to Next.js 14 (App Router) and helped migrate a legacy Symfony 3 backend to Django 5

I primarily worked with Next.js, Python/Django, and Vite/Webpack on projects including FFU, Novyny Live, TyKyiv, Levchyk, Gidna, Children Hub.

• Built responsive React/Next.js interfaces from Figma designs (Redux Toolkit, Material UI, SCSS Modules) and connected them to Django CMS APIs
• Refactored code, took part in peer reviews, and debugged features in close collaboration with backend developers and designers

Projects include Motormart, the PM-DT website, and several internal products.

• Developed internal ERPs and CRMs with TypeScript, React/Next.js, Node.js, and Firebase functions in an Agile (Scrum) team
• Implemented features and fixed bugs under senior code review; built web scraping and data-processing tools with Puppeteer

All projects were internal or under NDA.

Graduated in January 2025.

Graduated in 2023.

Successfully completed the SoftServe Academy course: Development, Design, and Architecture of Modern Software Systems Based on Object-Oriented Languages for the WebUI Developer position. The final project can be found on GitHub.

I have completed other courses and certifications:

Coursera: Object-Oriented Design, Algorithmic Toolbox, Introduction to Data Science in Python, GCP: Core Infrastructure, Essential GCP: Foundation, Essential GC Infrastructure: Core Services, Elastic GC Infrastructure: Scaling and Automation

Udemy: NestJS Microservices, Complete Guide to Elasticsearch

MongoDB University: MongoDB Basics, MongoDB Data Modeling, Basic Cluster Administration, MongoDB for JavaScript Developers