Особисті дані приховані

Oleg Guchok, CTO

I am a hardworking person who is always eager to learn and grow. I love facing new challenges and finding ways to solve difficult problems quickly. Each day, I strive to get better, polishing my skills and improving my approach to work.Being a tech fan, I keep up with all the latest developments and use them to make my work even better. My enthusiasm for technology encourages those around me, helping to create a teamwork and innovation-rich atmosphere. I have strong determination and discipline, which helps me do well in fast-paced environments and inspires my colleagues.In short, my drive to succeed, my skill with technology, and my dedication to ongoing learning make me someone who can make a strong contribution to any forward-thinking team.

Languages

Ukrainian - native, English - intermediate

Skills and expertise

Skills & Technologies
Python, Bash, Node,js, React, HTML/CSS
Ops
Docker, Kubernetes, AWS, Git, Linux Admin, Windows Admin, ArgoCD, Network
Databases
MySQL(MariaDB), Redis, Postgres
System Architecture
Amazon Web Services, Digital Ocean, Microsoft Azure, Hetzner
Project Management
Agile: Scrum, Kanban
Monitoring
Cloudwatch, Zabbix, Naggios

Education and Certifications

University

2018-2023
National University of Technologies and Design (KNUTD)
Master of Engineering - MEng, Computer and Information Systems Security/Information Assurance

Kyiv National University of Technologies and Design (KNUTD)
Bachelor of Engineering - BE, Computer and Information Systems Security/Information Assurance

Certifications

2024
Project Manager
2024
QA
2023
Основы AI
2022
Node.js - построение архитектуры приложений
2019
MTCNA, MTCRE, MTCUME, MTCSE, MTCTCE
2018
Python

Work experience

Project
Pautina.ua, System Administrator, Kiev 2016-2019
Technologies
Linux/Windows Server, FreePBX, Docker, ESXI/Hyper-V, Mikrotik, HP, Fortinet, AD,GPO, DNS, Veeam backup, Exchange, M365, Zabbix
Duration
3 years
Position
System Administrator
Tasks & Duties
Local network administration (total PC park of about '00 pieces + 23 Windows
Server, 3 linux);
Qaintenance and minor repairs of office equipment;
User training;
Connection, diagnostics, PC repair;
Huilding and ensuring the Functioning of IT infrastructure for many organizations
(hotels and restaurants, cafes); Planning and laying UTP, Xikvision video
surveillance
Server administration on Linux and Windows Server 2010, 2012, 2016, QS
Exchange, AD, GPO, medok support, league, helpdesk (servicedesk), Zabbix
monitoring services, nagios.
Completion and assembly oZ server e:uipment, moderni ation oZ PCs and laptops.
OpenVPN, Zail(Exchange, Vimbra), DNS, DHCP, Asterisk, AD, GPO, GRE, VPN,
HYPER-V, ESXI, IPSec, Firewall;
Managed network equipment Mikrotik, Ubiqiti, Huawei, dlink, HP, Edge-Core, EnGenius, Fortinet;
Support and maintenance of the company network (ethernet, wifi);
Audit and modernization of network infrastructure;
network design and deployment;
Analysis and troubleshooting;
Installation and support of servers;
Configuration and administration of Windows Server 2012R2/2016/2019/2022;
Maintenance of Lenovo server;
Participation in Cyber Security projects;

Project
AMACO Ukraine 2019-2020
Technologies
Linux, Docker, Node.js, Windows, FreePBX
Duration
10 months
Position
Devops Engineer & Network Architect
Tasks & Duties
Created a secure, comprehensive architecture from scratch for the company. Servers for Linux-based applications were set up, where software for diagnosing tractors and trucks was placed. The entire infrastructure for the operation of the entire office and various systems was also configured.

Designed a server part based on microservices using Docker, containers of which are securely stored in registry gitlab.
Maintained core relational database and in-memory data store using Redis-cluster for fast data retrieval.
Increased system security by configuring firewalls on public subnets for optimal performance and protection against unauthorized access.

Project
Activitis - Weagro & eDilo 2020-2024
Technologies
AWS, Docker, Redis, MongoDB, MariaDB, TeamCity, Advanced VPC - NACL
Duration
4 years
Position
Devops Engineer & Solutions Architect
Tasks & Duties
Developed an automation platform on AWS.

Implemented Docker for backend and frontend deployment phase using TemCity.

Managed MariaDB database for device and user data.

An improved VPC network structure has been developed to improve security.

Implemented cloud cost monitoring and optimization strategies using AWS tools.

Provided detailed cloud spend reports to project stakeholders, proposing cost-effective solutions.

Project
Rebail Capital/Actinia 2020-2024
Technologies
AWS, EC2, MariaDB, Amazon S3, Redis, CloudWatch, Docker, Rabbit MQ, Teamcity, Git, Rocky Linux 9
Duration
4 years
Position
Solutions Architect & Devops Engineer & CTO
Tasks & Duties
Architected and Managed AWS Infrastructure:
• Designed and implemented a robust system architecture on AWS to ensure high availability, scalability, and security.
• Utilized a variety of AWS services including EC2, S3, RDS, VPC, IAM.
• Implemented automated backup and disaster recovery solutions using AWS Lifecycle Manager to ensure data integrity and system resilience.
Containerization and Deployment:
• Deployed microservices architecture using Docker containers to ensure consistency across development, testing, and production environments.
• Managed continuous integration and continuous deployment (CI/CD) pipelines using TeamCity, enabling efficient and reliable software delivery.
• Automated deployment processes and orchestrated container management, ensuring seamless updates and rollbacks.
Security and Compliance:
• Implemented comprehensive security measures, including antivirus scans, rootkit detection, and intrusion detection systems (IDS), to safeguard against threats and vulnerabilities.
• Conducted regular security audits and vulnerability assessments to ensure compliance with industry standards and best practices.
• Configured and managed security groups, IAM roles, and policies to enforce least privilege access and protect sensitive data.
Payment System Development:
• Developed and maintained a secure and scalable front-end and back-end payment system for online transactions.
• Integrated multiple payment gateways to support various payment methods, including Apple Pay and Google Pay, enhancing user convenience and payment flexibility.
• Ensured PCI-DSS compliance for all payment processing activities to protect customer data and maintain trust.
Monitoring and Performance Optimization:
• Set up and configured monitoring tools and dashboards using Zabbix
• Analyzed performance metrics and logs to identify bottlenecks and optimize system performance.
Collaboration and Documentation:
• Worked closely with cross-functional teams, including developers, QA engineers, and product managers, to align on project goals and deliverables.
• Created detailed technical documentation and standard operating procedures (SOPs) to ensure knowledge sharing and operational continuity.
• Conducted training sessions and provided technical support to team members to foster a collaborative and efficient work environment

Project
Billing – FinansoUA 2024
Technologies
AWS, Amazon Cognito, API Gateway, Elastic Container Service (ECS), Simple Queue Service (SQS), MariaDB, S3, CloudFront, WorkMail, MQ, SSO, Grafana, Kubernetes, Rocky Linux 9
Duration
10 months
Position
CTO
Tasks & Duties
Managed user authentication via Amazon Cognito and integrated ECS tasks with API Gateway for handling immediate API requests and data aggregation.
Leveraged Amazon SQS for task queuing, and deployed ECS 'file processing' and 'separator' tasks to process the queued tasks, including handling of failed messages via Dead Letter Queue (DLQ), and data persistence with MariaDB.
Utilized Amazon S3 for handling large file uploads.
Developed an efficient system for extensive operations, segregating immediate and queued tasks for optimal performance.
Incorporated multi-part upload for large files in S3

Project
PaySystem - FinansoUA
Technologies
AWS, EC2, MariaDB, Amazon S3, Redis, CloudWatch, Docker, Rabbit MQ, Teamcity, Git, Rocky Linux 9
Duration
9 months
Position
CTO
Tasks & Duties
Architected and Managed AWS Infrastructure:
• Designed and implemented a robust system architecture on AWS to ensure high availability, scalability, and security.
• Utilized a variety of AWS services including EC2, S3, RDS, VPC, IAM.
• Implemented automated backup and disaster recovery solutions using AWS Lifecycle Manager to ensure data integrity and system resilience.
Containerization and Deployment:
• Deployed microservices architecture using Docker containers to ensure consistency across development, testing, and production environments.
• Managed continuous integration and continuous deployment (CI/CD) pipelines using TeamCity, enabling efficient and reliable software delivery.
• Automated deployment processes and orchestrated container management, ensuring seamless updates and rollbacks.
Security and Compliance:
• Implemented comprehensive security measures, including antivirus scans, rootkit detection, and intrusion detection systems (IDS), to safeguard against threats and vulnerabilities.
• Conducted regular security audits and vulnerability assessments to ensure compliance with industry standards and best practices.
• Configured and managed security groups, IAM roles, and policies to enforce least privilege access and protect sensitive data.
Payment System Development:
• Developed and maintained a secure and scalable front-end and back-end payment system for online transactions.
• Integrated multiple payment gateways to support various payment methods, including Apple Pay and Google Pay, enhancing user convenience and payment flexibility.
• Ensured PCI-DSS compliance for all payment processing activities to protect customer data and maintain trust.
Monitoring and Performance Optimization:
• Set up and configured monitoring tools and dashboards using Zabbix
• Analyzed performance metrics and logs to identify bottlenecks and optimize system performance.
Collaboration and Documentation:
• Worked closely with cross-functional teams, including developers, QA engineers, and product managers, to align on project goals and deliverables.
• Created detailed technical documentation and standard operating procedures (SOPs) to ensure knowledge sharing and operational continuity.
• Conducted training sessions and provided technical support to team members to foster a collaborative and efficient work environment

Personal Qualities

Responsible, diligence, quick learner, team player, creative approach to problem solving

Hobbies & Activities

Football, Volleyball, Swimming, Drift, Diagnostics, coding BMW