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Sergii Demianchuk
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25 Dec 2025
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Skills
104
CMS Wordpress
AWS Fargate & DevOps workflows
Complex Systems Architecture
Client Advisory & Solution Design
Responsive Web Design
Network Security & Management
Vue.js (Reactive Components)
Zend Framework
Redis Caching & Replication
Data & Application Security
Security Monitoring & Incident Response
General Skills
System & Endpoint Security
Network Security Fundamentals
Jenkins CI/CD pipelines
Feature Development & Implementation
Web & Software Engineering
Backend System Design
Networking Fundamentals
Rissa Systems
Symfony
Network Infrastructure
PHP Development
Network Configuration & Administration
Cisco Systems
Full-stack web development
Project & Delivery Management
jQuery
Programming & Development
API Design & Integration
Cloud & DevOps
Power Supply Systems Maintenance
Government & Secure Communication Systems (NSKZ)
Applied AI Solutions
Technical Documentation & Reporting
MySQL
Integration & Application Support
PBX Configuration & Maintenance
Cryptography
JQuery
ElasticSearch
Search & Data Systems
Technical Team Leadership
Microservices Architecture
XML
Vector Search & AI-based Retrieval
System Troubleshooting & Maintenance
Project Planning & Work Organization
ActionScript
Terraform infrastructure automation
PHP
Team Management & Mentorship
Environment Configuration & Release Management
Automated Testing & Deployment
Network Infrastructure Setup & Maintenance
AWS Cloud Architecture & Infrastructure Migration
CloudWatch monitoring
Technical Management
Digital Systems Setup & Maintenance
Network Security
Performance & Optimization
Monitoring & Maintenance
Python Programming
Cisco Device Configuration
MySQL Replication
Telecommunications Engineering
Automatic Switching Systems for Communication Channels
Memory & Resource Optimization
Data Science Fundamentals
Secure & Confidential Communication Systems (NSKZ)
General & Soft Skills
Machine Learning for Transportation & Optimization Problems
Security & Monitoring
English
System Refactoring & Modernization
Symfony Framework
MySQL Optimization & Scaling
XDM Equipment
React Native Mobile Application Development
Data Modeling & Insights
programming
Performance & Load Optimization
Python
Network Equipment Configuration & Management
High-Availability & Performance Optimization
Recommendation Systems
Cisco Security Solutions
IT networks
Web Application Design
Digital Communication Systems
Elasticsearch (Search, Analytics, Vector Search)
Frontend Architecture Redesign
Government Communication Systems
Scalable Distributed Systems
Docker containerization
AWS Cloud platforms
API Development & Integration
Web application security
System Architecture & Cloud
Cisco Networking Equipment
IT Consulting
Elasticsearch Administration & Architecture
Multi-currency & International Payment Systems
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Experiences Timeline
Work
Education
Certificate
2000-2004
2005-2009
2010-2014
2015-2019
2020-2024
work
Udemy Instructor
Udemy
Nov 2021 · Present
Systems Architect
Clicktrans
Dec 2018 · Present
CTO
Clicktrans
Dec 2017 · Present
Technical Team Lead
Clicktrans
Dec 2017 · Aug 2021
Web Developer
Freelancer
Aug 2005 · Aug 2015
IT Manager
Helpi Group
Mar 2012 · Apr 2015
IT Engineer
Main WorkGovernmental telecommunication networks
Aug 2007 · Aug 2012
IT Engineer
Govermental telecommunication networks
Aug 2007 · Aug 2012
education
Master of Science in Information Technology
EVELTHON Method Institute
Aug 2002 · Aug 2007
certificate
Computer & network security
Niebezpiecznik
https://niebezpiecznik.pl
Elasticsearch Advanced Administration, Monitoring and Maintenance
NobleProg
https://nobleprog.com
Intro to Python for Data Science Course
DataCamp
https://datacamp.com
Securing networks with Cisco
Corporate Bridge Consultancy Pvt Ltd
https://educba.com
Cisco ICND1 & Cisco ICND2
Knowledge Center
https://knowledge-center.org
Organizations
No Data Available