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Sergii Demianchuk
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25 Dec 2025
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104
IT Consulting
Responsive Web Design
AWS Fargate & DevOps workflows
Complex Systems Architecture
Client Advisory & Solution Design
Network Security & Management
Redis Caching & Replication
Data & Application Security
Vue.js (Reactive Components)
Zend Framework
Backend System Design
Security Monitoring & Incident Response
Feature Development & Implementation
Web & Software Engineering
General Skills
Jenkins CI/CD pipelines
Network Security Fundamentals
System & Endpoint Security
Networking Fundamentals
Cisco Systems
Symfony
Network Infrastructure
PHP Development
Network Configuration & Administration
Rissa Systems
Programming & Development
Project & Delivery Management
jQuery
Full-stack web development
MySQL
Integration & Application Support
Applied AI Solutions
Technical Documentation & Reporting
API Design & Integration
Cloud & DevOps
Technical Team Leadership
XML
ElasticSearch
Search & Data Systems
Microservices Architecture
System Troubleshooting & Maintenance
PBX Configuration & Maintenance
JQuery
Power Supply Systems Maintenance
Team Management & Mentorship
Environment Configuration & Release Management
PHP
Terraform infrastructure automation
Project Planning & Work Organization
Government & Secure Communication Systems (NSKZ)
Vector Search & AI-based Retrieval
ActionScript
Monitoring & Maintenance
CloudWatch monitoring
Technical Management
Network Security
Cryptography
Network Infrastructure Setup & Maintenance
AWS Cloud Architecture & Infrastructure Migration
Automated Testing & Deployment
Digital Systems Setup & Maintenance
MySQL Replication
Telecommunications Engineering
Automatic Switching Systems for Communication Channels
Performance & Optimization
Memory & Resource Optimization
Python Programming
Data Science Fundamentals
Cisco Device Configuration
Security & Monitoring
Machine Learning for Transportation & Optimization Problems
Secure & Confidential Communication Systems (NSKZ)
React Native Mobile Application Development
Data Modeling & Insights
MySQL Optimization & Scaling
XDM Equipment
System Refactoring & Modernization
Symfony Framework
General & Soft Skills
English
Cisco Security Solutions
IT networks
programming
High-Availability & Performance Optimization
Recommendation Systems
Python
Network Equipment Configuration & Management
Performance & Load Optimization
Government Communication Systems
Scalable Distributed Systems
Digital Communication Systems
Elasticsearch (Search, Analytics, Vector Search)
Frontend Architecture Redesign
Web Application Design
Web application security
System Architecture & Cloud
API Development & Integration
Elasticsearch Administration & Architecture
Docker containerization
AWS Cloud platforms
Multi-currency & International Payment Systems
html
CMS Wordpress
Cisco Networking Equipment
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