● Led the comprehensive development and management of a custom CRM platform (Live-Chat, Helpdesk, Analytics) to consolidate customer information, resulting in a 20% increase in sales and a 50% reduction in support workload. Coordinated cross-functional teams (front-end, back-end, and UI/UX) to ensure successful project delivery.● Directed the full-stack development of an integrated Live Chat feature with Analytics, scoring customers based on engagement metrics. This led to a 20% increase in sales conversions. Designed a user-friendly interface resembling popular messaging apps, including voice messaging, to ensure high user engagement and satisfaction (Java/AWS Translate API).● Managed backend optimization to support efficient data processing and real-time communication. Implemented Pusher for instant notifications, reducing response times by 30%. Transitioned cloud storage from Amazon S3 to Cloudflare R2, achieving cost-effective file management.● Enhanced the Help Desk system to improve operator response, incorporating automated solutions for frequent inquiries, reducing resolution time by 40%. Integrated multiple email services (Amazon SES, Postmark) for reliable email notifications, allowing users to respond via email directly into the ticketing system.● Coordinated the synchronization of the Analytics module with Live Chat and Help Desk, providing operators with comprehensive customer data, including purchase history, engagement scores, and country information. Improved support efficiency by 35% using JavaScript, browser storage, and Cloudflare Worker (NodeJS) for high performance and minimal site load impact.

● Developed a secure method to encrypt media file headers (C++) using AndroidBox hardware IDs and designed a video encryption program with an embedded algorithm in Kodi media player, enhancing content protection by 50% and ensuring exclusive playback on specific AndroidBox devices.● Contributed to Kodi media player enabling decryption and playback of encrypted media content (C Make).● Modified AndroidTV firmware (Java/C Lang) to meet project requirements, collaborating with a Chinese team to integrate customized firmware with their AndroidBox devices, ensuring seamless functionality.

● Designed a secure software lock integrated with customer hardware IDs, reducing unauthorized usage by 95%.● Enhanced anti-piracy measures and application responsiveness using Delphi and Assembly (Thread Management, Parallel Programming, Hooks, API Redirection, Anti Debugging, Anti Disassembling, Encryption Algorithms, Anti Memory Dumping, Anti Patching, Assembly Code Obfuscation).● Created a Java-based Restful API for online software lock verification, integrated with customer purchase systems.● Employed Redis for real-time data checks, leveraging in-memory operations for high-speed performance.● Deployed and managed scalable infrastructure with 5 geographically distributed servers, ensuring minimal latency and continuous availability with 99.9% uptime.● Used Cloudflare Load Balancers to manage and distribute incoming requests, improving system reliability and performance.● Established a master-slave database synchronization with Redis Sentinel, maintaining data consistency and providing automatic failover.● Implemented advanced security measures using Tomcat request filtering to protect data integrity, reducing security breaches.

● Designed and implemented an integrated accounting and CRM system (Delphi), reducing data entry errors by 40%.● Developed API integrations with national transportation services, eliminating over 10 manual order entry positions, resulting in a 25% cost reduction.● Engineered a high-performance, ACID-compliant database architecture (Firebird, SQL, NoSQL), managing millions of records efficiently and supporting over 100 daily users with minimal latency.● Implemented the software across the company's network, enhancing speed and accessibility, reducing downtime by 30%.● Established advanced user access controls (ACL) with role-based permissions, enhancing security and usability.

● Collaborated with bestselling computer book authors, receiving valuable feedback from over 100,000+ readers, significantly enhancing understanding of audience perceptions. Mentored and led a team of authors, resulting in the successful publication of 15 IT books.