Denis Kolmykov

Optimized database performance (MySQL, PostgreSQL, MongoDB), reducing query execution time by 20–30%. Developed complex web applications using frontend (React, Vue.js) and backend (Node.js, PHP, Python) technologies. Integrated RESTful APIs and GraphQL for client–server communication. Automated deployment processes using Docker and CI/CD tools (GitLab CI, Jenkins). Worked on high-load systems, leveraging caching (Redis) and query optimization. Delivered modular and scalable applications in line with client requirements.

Information Technology, Systems Integration, Internet

- Internet company (search engines, payment systems, social networks, informational/educational and entertainment resources, website promotion, etc.)

- Software development

- Systems integration, automation of technological and business processes, IT consulting

Financial sector

- Debt collection

- Bank

Resume updated on May 14, 2025 at 20:52

Lead Developer

Training and Mentorship:

- Organized onboarding for new employees; delivered regular training in HTML, CSS, JavaScript, PHP, Python.

- Mentored on using Git and development tools, including Visual Studio Code and WebStorm.

Service Standards Development:

- Developed and implemented customer service standards, improving interaction quality and customer satisfaction.

- Built systems to monitor key performance indicators, ensuring quality control.

Data Analysis and Reporting:

- Collected and analyzed data using SQL and Python; prepared analytical reports to optimize business processes.

Customer Experience Improvement:

- Optimized the CRM system, enabling more efficient handling of complaints and claims.

- Developed strategies to increase customer satisfaction, leading to higher loyalty.

Process Automation:

- Led projects to automate customer service; implemented technologies to improve process efficiency.

Cross-Department Coordination:

- Collaborated with marketing, sales, and technical support to implement the company’s strategic plans.

Development Planning and Frontend Development:

- Planned and managed frontend projects using React, Angular, and Vue.js.

- Ensured adherence to quality standards and on-time delivery.

Key Achievements:

- Developed and implemented service standards, increasing customer satisfaction by 20%.

- Successfully led a customer service automation project, reducing request processing time by 30%.

- Trained and mentored 20 new employees, improving team efficiency and speeding up onboarding.

Moderation and Content Control:

- Built and maintained the backend of the moderation system to enforce platform rules using Python and Node.js.

- Integrated filtering and blocking algorithms for unwanted content (text, images, video) with machine learning to automate workflows.

Violation Handling:

- Implemented automated detection and blocking of users violating platform rules through behavior analysis via APIs and blocking by IP addresses and devices.

- Used MySQL and PostgreSQL to store user data and violation statistics.

Conflict Prevention:

- Developed algorithms to prevent user conflicts; implemented real-time session analysis through logging and monitoring.

- Implemented caching of violation and request data using Redis to improve performance.

Employee Training:

- Organized and conducted training for new employees on platform operations, moderation technologies, and content control systems.

Feature Development:

- Participated in planning and developing new platform features, including improved moderation and integration with external services to enhance quality.

- Designed and implemented RESTful APIs for interaction with the frontend.

Security and Improvements:

- Prepared regular reports on task execution and identified security threats; proposed system enhancements.

- Collaborated with the security team to identify vulnerabilities and minimize risks using tools such as Wireshark and Burp Suite.

Achievements:

- Implemented a moderation system, reducing complaints about unwanted content by 30%.

- Optimized the user blocking process, increasing violation processing speed by 40%.

- Trained and onboarded 5 new employees, accelerating their integration into workflows.

Key Technologies and Tools:

- Backend: Python, Node.js

- Databases: MySQL, PostgreSQL, Redis

- API: RESTful API

- Analysis Tools: Wireshark, Burp Suite

- Moderation and Automation: machine learning, logging, monitoring