Bohdan V.

3E develops advanced electro-optical systems used in defense and industrial sectors.

• Managed end-to-end development of a large custom ERP from scratch, streamlining manufacturing, logistics, HR, and support workflows for thousands of daily operations.
• Created and implemented high-load modules, including quality control, invoicing, quotations, customer support, HR management, purchase and sales orders, and payment processing.
• Designed and optimized MySQL and PostgreSQL schemas to support hundreds of concurrent users and millions of records with fast response times.
• Developed real-time communication features, such as internal chat using Socket.io, enhancing coordination across departments.
• Integrated Elasticsearch to enable fast search queries over large product inventories, increasing query speed by over ten times.
• Applied caching and queue-based patterns (Redis, RabbitMQ) to handle heavy workloads and eliminate bottlenecks in reporting, syncing, and background tasks.
• Improved CI/CD processes and Docker-based deployments on DigitalOcean, increasing release frequency and minimizing downtime.

Digital Basis builds Trak, a leading end-to-end job management platform used by hundreds of trade and service businesses across Australia and New Zealand.

• Developed and maintained core platform modules that powered project management, invoicing, accounting, scheduling, timesheets, and field operations.
• Implemented data import/export pipelines that enabled clients to migrate large datasets into the Trak platform seamlessly.
• Built custom reporting tools and dashboards that were used daily by operational managers across multiple industries.
• Integrated payment processing solutions and automated billing workflows to streamline cash operations for end users.
• Improved system scalability by optimizing SQL queries, refactoring Yii controllers, and introducing Redis-based caching layers.
• Supported AWS-based infrastructure improvements and automated deployment processes.

Agiveo developed a mobile-optimized free-to-play football manager game that grew organically to over 15,000 registered players worldwide.

• Built the full game platform from scratch, including the backend, UI, admin tools, and operational infrastructure.
• Engineered the match generation and simulation engine, which handled high-load peak traffic during synchronized match events.
• Designed optimized MySQL schemas and caching strategies to support real-time game logic for thousands of active users.
• Implemented queue-based processing with RabbitMQ to manage heavy asynchronous tasks such as match updates, rewards, and event scheduling.
• Integrated multiple third-party APIs, including payment gateways, analytics, and social login, to support monetization and user engagement.
• Built a responsive web interface using JavaScript and jQuery, optimized for mobile browsers.
• Deployed and maintained production infrastructure on DigitalOcean, managing backups, monitoring, scaling, and load balancing.