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Yevgeny — jekasumy  
System administration · Software and server configuration
Ukraine Sumy, Ukraine
Professional system administration. Linux/Unix.
9361
 435  0

My Skills and Experience I specialize in and work with various operating systems: Debian Ubuntu RHEL CentOS FreeBSD Windows I work with server hardware: IBM HP ProLiant Dell PowerEdge Supermicro I know how the following software should work: Web: Apache, Nginx, Lighttpd, OpenLiteSpeed Mail: Exim, Postfix, Dovecot FTP: ProFTPd, vsftpd, PureFTPd DNS: BIND, PowerDNS DHCP Gateway: NAT, traffic shaping Proxy: Squid Directory: LDAP AAA: FreeRADIUS VPN: IPsec-based, OpenVPN, PPTP, L2TP TFTP NTP Syslog TLS/SSL SNMP Virtualization: KVM, Xen, VMware ESX, OpenVZ, Proxmox Backup and Restore: RSYNC Revision Control Systems: CVS, SVN, Git File Sharing: NFS, SMB Software-Defined/Network-Based Storages: DRBD, Ceph, iSCSI, AoE Printing Systems: CUPS I am familiar with databases: PostgreSQL MySQL I have experience with monitoring systems: Zabbix Cacti Munin I also work with: Telephony: Asterisk (FreePBX, Elastix, MikoPBX) Routers: Mikrotik, All (Firmware OpenWRT, DD-WRT), hardware repair Billing systems for Internet Service Providers: Abills, Ubilling (building networks from scratch) Billing systems for hosting providers: BillManager, RootPanel, WHMCS Hosting panels: ISPManager, CPANEL, BrainyCP, VestaCP, ISPConfig, aaPanel, HestiaCP PON equipment (ONU, OLT): BDCOM Switches: Mikrotik, D-Link, TP-LINK, Cisco I have extensive experience in these areas. Feel free to reach out to me, I'll answer all your questions! Please note: I do not engage in website development.
  • abills
  • bgp
  • billing
  • CloudLinux
  • cPanel
  • hestiacp
  • ISPmanager
  • linux / windows
  • Mikrotik
  • nginx
  • routeros
  • VestaCP
  • Zabbix

1C · Application programming
Ukraine Dnepr, Ukraine
2550
 38  0

Sergii Yanov System Administrator, Programmer Skills Automation of accounting and finance. Business process development. Analysis and resolution of software issues, including 1C. Project development and technical documentation. Development and implementation of data analysis systems. Integration of software systems. Planning and deployment of network and technical infrastructure. Maintenance and repair of computer and server hardware. Deployment of monitoring and backup systems. Development, optimization, and implementation of network infrastructure. Configuration and maintenance of networking devices (including Microtik and Cisco). Virtualization system setup. Selection and optimization of hardware. Software development and customization. Work History Jun 2017 - Oct 2023 Freelancer Private Entrepreneur Yanov S.V., Dnipro My professional activities encompass a variety of projects related to equipping, optimizing, supporting, and implementing the information infrastructure of enterprises. I am also involved in servicing and repairing computer equipment, as well as server infrastructure based on Windows and Linux platforms. My work includes deploying monitoring systems and creating data backups to ensure the reliability and security of information. I design, implement, and integrate the network infrastructure of enterprises, as well as configure and maintain network equipment. In my toolkit, there is also the configuration and maintenance of virtualization systems, virtual servers, and workstations. I engage in selecting and optimizing hardware for various projects, such as accounting systems, CRM, and web products. Additionally, I develop and customize software, including CRM systems, web applications, and accounting systems. My professional scope also encompasses configuring network equipment, including devices from Microtik, Cisco, and other manufacturers. I have experience working with various models and brands of network equipment, ensuring its proper functioning and alignment with the infrastructure needs of enterprises. Mar 2016 - Jun 2017 Analyst-Programmer of Information Systems Biosphere Corporation, Dnipro In my previous role at Biosphere Corporation, I undertook a diverse array of pivotal responsibilities geared towards enhancing operational efficiency and the agility of corporate procedures: My contributions significantly bolstered operational efficiency, curtailed risks, and elevated corporate resource management. I was an integral part of a team fervently dedicated to the continual enhancement and innovation within the realm of information technology and corporate process governance. Furthermore, my responsibilities extended to strategic planning and the deployment of network and technical infrastructure meticulously tailored to the specific requirements of my projects. This task demanded not only the formulation of an optimal infrastructure to underpin business processes but also the assurance that each project boasted a dependable and high-performance technical foundation. Aug 2013 - Mar 2016 IT Director Exim Textile LLC, Dnipro My experience includes deploying server and network infrastructure, implementing, supporting, and enhancing the 1C ERP system, as well as automating warehouse operations. My responsibilities encompassed the following key aspects: All these tasks required a wide range of knowledge and skills in the fields of information technology, accounting, and business process automation. My work contributed to enhancing the company's efficiency and competitiveness by ensuring the reliability and accuracy of information systems, as well as optimizing resource and process management." Please note that this translation is provided for reference, and you may want to review it for any specific terminology or context adjustments depending on your needs. Mar 2003 - Jul 2013 Director Private Entrepreneurship (PE) SV-Service, Dnipro Technical IT Maintenance and Repair: Diagnostics and repair of computers, laptops, and tablets of various brands and models. Installation and configuration of operating systems (Windows, Linux, macOS) and application software. Replacement and maintenance of hard drives, RAM, motherboards, graphics cards, and other components. Collaborating with clients to identify and resolve technical issues, providing technical support and guidance. Installation and updating of antivirus programs and ensuring data security. Technical Maintenance of Office Networks: Regular technical maintenance of office computers and networks. Troubleshooting hardware and software issues to minimize downtime for employees. Managing computer equipment inventory and upgrading components as needed. Assisting users with computer and software setup and usage. Working with 1C Products: Selection and consultation of clients on suitable 1C products based on their needs and business processes. Active participation in sales, including product presentations, creating commercial proposals, and contract negotiations. Implementation and configuration of 1C products for clients, including user training and initial support. Project management for the implementation of 1C solutions, from requirements gathering to successful deployment. Website Development and Integrations: Website development using modern technologies and platforms. Customizing accounting systems to meet client-specific requirements. Developing integrations to optimize business processes and data exchange between various systems. Aug 2001 - Feb 2002 Systems Administrator State Enterprise "UkroptGroceries", Dnipro My professional activity focuses on ensuring the reliable and uninterrupted operation of the enterprise's information infrastructure, as well as on the development and improvement of software for financial and production management. My role includes the following key responsibilities: Windows Server Management and Administration: Optimization and support of Windows-based computers and servers to ensure high performance and reliability. Deployment and configuration of new servers, as well as data migration when necessary. Management and monitoring of server resources to prevent overloads and failures. Network Infrastructure and Security: Configuration and support of network devices, including routers, switches, and firewalls, to ensure reliable connectivity and security. Configuration and updating of software, including patch installation and security updates, to minimize vulnerabilities and risks. Data Management and Backup: Implementation of a data monitoring and automatic backup system to ensure data integrity and rapid recovery in case of failures. Development and implementation of data storage strategies for efficient resource management and data availability. Data Security and Network Security: Configuration and maintenance of firewalls and antivirus systems to ensure a high level of data and network security. Development and implementation of security policies, as well as monitoring and response to potential threats. User Support and Accounting: Providing technical support to employees, including troubleshooting technical issues and IT consulting. Installation, support, and customization of software for financial and production management to optimize business processes and improve efficiency. This comprehensive approach allows me to effectively manage and maintain the IT infrastructure, ensuring its stability, security, and alignment with the organization's goals Education Sep 1998 - Jun 2003 Specialist's Degree: Transport Process Management Dnipro National University of Railway Transport - Dnipro, Ukraine Sep 1987 - May 1998 High School School #139 - Dnipro, Ukraine Car repair and various electrical equipment repair Languages Russian: Native language. Ukrainian: Native language. English: Intermediate, actively learning.
  • delphi
  • odoo
  • PHP Backend Developer

Web programming · PHP
Ukraine Kyiv, Ukraine
501
 2  0

DEVOPS ENGINEERSUMMARY:Good knowledge of PHP, Bash, JavaScript;Good knowledge of working with virtualization tools (ESXI, VirtualBox);Good knowledge of working with Linux OS (Ubuntu, Debian, CentOS);Understanding of database concepts (MySQL);Basic knowledge of Python, OSI Model;Basic knowledge of working with Docker;Good skills of google search;Some experience to using GIT; PHP(WORDPRESS) DEVELOPER SUMMARY:Have 2+ years of experience in the web development;Have 2 years of experience in the WordPress development;Good knowledge of PHP, JavaScript, HTML, CSS;Understanding the principles of working with DOM;Understanding of database concepts (MySQL);Basic knowledge of working with objects in PHP;Basic knowledge of themes structure, templates, hooks;Experience in creating WordPress themes;Basic knowledge of creating WordPress plugins;Basic knowledge of Laravel framework;Basic knowledge of working with Gutenberg WordPress;Working experience with popular plugins (ACF, WPML, Woocommerce);Experience with WordPress sites' speed up;Some experience to using GIT;Basic knowledge front-end build tool (Webpack, Gulp); LANGUAGES: English: Intermediate; Ukrainian: native.
  • ajax
  • Bootstrap
  • DevOps engineer
  • jquery
  • Junior PHP developer
  • landing page
  • Parsing
  • sysadmin
  • Vue.js

System administration · DevOps
Ukraine Rovno, Ukraine
348

- Development, design, maintenance of the computer networks, computer equipment, network services, improvement and analysis of existing network, server, and service infrastructure; - Users’ technical and software support; - Setting up and maintaining Microsoft based operation systems WinXX, Windows Server 20XX; - Setting up and maintaining Linux based operation systems Debian, Ubuntu, CentOS, and Unix-like FreeBSD; - Administration of the: MTA(Dovecot, Postfix, Exim4, MS Exchange Server), FTP, SQL(MS SQL, MySQL, PostgreSQL, MongoDB), LAMP(Apache, Nginx, PHP), HAProxy, DNS, DHCP, NPS, DFS, NAS, VPN; - VoIP servers; - AD, LDAP, AAD; - Extensive experience with DigitalOcean, Amazon AWS, GCP, Vultr, Azure, and other cloud service providers; - Ubiquity, Mikrotik, Cisco, Dell, HP, Fortigate, SonicWall network equipment; - Intrusion detection/prevention services (IPS, IDS, SNORT, Suricata) firewall (routing, VLAN, ACL, Proxy, NAT, DMZ), CARP, HA; - HP, Supermicro, DELL, Fujitsu Siemens, IBM, Lenovo, EMC, NetApp equipment; - Website administration (WordPress, Joomla, PHP, HTML, css etc.); - Virtualization (Proxmox, Virtualbox, VMware, HyperV); - etc
  • Mikrotik
  • System Administrator
  • Windows Server

DevOps · System administration
Ukraine Kharkiv, Ukraine
I can manage with anything. If I don't know how to do something, I'll learn and complete it.
318

- I am a System Engineer with more than 20 years of extensive experience in systems design, administration, support including 5 years working as a DevOps Engineer. - My expertise encompasses effective planning, design, installation, configuration, maintenance, and optimization of IT systems for achieving high availability and performance. - I am skilled in working with cloud computing platforms such as Amazon Web Services, creating and configuring the infrastructure using IaC tools, and working with CI/CD process and source control tools. - Additionally, I have experience as a Chief Technology Officer and Head of IT Department with 6 immediate subordinates and general team of 12 employees. It helped me to develop good planning and organizational skills, so I am confident working independently or as part of a team. - work as an individual entrepreneur. CLOUDS - AWS: EC2, IAM, AMI, S3, VPC, SubNets, SecurityGroup, ACL, Routing, NAT GW, InternetGW, BastionHost, VPN, Route53, Lamda, ALB, ELB, Auto Scaling Group, Parameter Store, SNS, SQS, WAF, CloudFront, CodeCommit, Beanstalk, EKS, Kinesis, Redis OS FreeBSD, Linux (Ubuntu, CentOS, AWS Linux) VIRTUALIZATION Docker, Docker-Compose, Kubernetes ( K8s ), KVM, VMware ESXi MONITORING Nagios, Zabbix, Prometheus MySQL optimization, clustering (replication setup, configuration, recovering) IaC, Config control Terraform, SaltStack, Ansible Dev auto tools : Jenkins (groovy scripting), GitLab (CI/CD, configuring gitlab-ci.yml) Version control : Git Scripting : Bash, Python NETWORKING - NET : TCP / IP stack. CARP - Routing : OSPF, BGP - CISCO : vlan, trunk, ports aggregation LACP, static routes configuring, acl. FAILOVER RAID, link aggregation; redundant channels and STP, net interfaces aggregation, load balancing and traffic distribution at various levels of the OSI model (CARP, BGP, OSPF, Nginx, HProxyServer, CDN GeoDNS) TELEPHONY VoIP server Asterisk integrated with PBX (with PRI) PBX - Samsung iDCS 500 (PCMMC OfficeServManager 3.75) programming, cross patching and laying of SCS. Mitel 3300, wifi Mitel phones SATELLITE & GSM Seatel ACU, iDirect modem, FB250, Iridium, Internet/telephony/TV via satellite systems and a GSM operator. Misc ELK Stack (Kibana), Jira, FireWall (ipfw, pf, iptables), VPN (OpenVPN, mpd5, netgraph), Samba, Postfix, Exim, Apache, Nginx, php-fpm, FTP
  • Amazon AWS
  • ansible
  • DevOps engineer
  • docker
  • docker-compose
  • GCP
  • Gitlab-CI
  • jenkins
  • k8s
  • kubernetes
  • Networking
  • SaltStack
  • System Administrator
  • terraform

3D modeling · 3D modeling and visualization
Kazakhstan Almaty (Alma-Ata), Kazakhstan
222
  • 3D modeling
  • blender 3d
  • game design
  • Game designer

Web programming · System administration
Ukraine Sumy, Ukraine
187

Web development: - Creation, refinement and maintenance of CMS sites Joomla, WordPress, OpenCart, Magento, ModX, Drupal, 1C-Bitrix; - I work with PHP, CSS, HTML, JS, Ajax, jquery, Bootstrap, Laravel; - Work with hosting, servers, databases, domains, SSL; - Corporate mail and CRM systems; - Creation and support of Internet broadcasting (streaming); System administration: - Work with Windows (XP/7/8/10/11/2003/2008/2012/2016/2019/2022), Linux (Ubuntu, Debian, CentOS); - Work with servers and backup; - Virtualization (Hyper-V, Azure, Esxi); - Domain network, Terminal Server, Active Directory, IMAP, POP, SMTP, DNS, DHCP, FTP, VPN, SSH; - Working with MikroTik, D-Link, TP-Link, Ubiquiti, Cisco network equipment; - Installation and configuration of drivers, antivirus, multimedia, system, office and accounting programs (1C, MeDoc, Client-Bank, MS Office...);

Python · Machine learning
Netherlands Netherlands
71

SKILLS Cloud: Proficient in AWS(iam/roles/permissions, EC2, S3, ELD, EKS, etc), Hetzner, others including specialized like Twilio. Docker expert, Kubernetes, Ansible, Terraform. CI/CD. Networking, routing for secure services/API interaction. Infrastructure as code approach. Up, Down, Development, Test, Production config/templates/environments. AI, LLM, Machine Learning: NLP techniques and linguistic tree analysis at sentence/grammar or morphology features level. LLMs hosted pipelines, cloud GPU/on demand usage with Hugging Face, Runpod, Lambda labs, Tensordock. Vector databases such as Pinecone Cloud or hosted Millvus/S3/etcd distributed cluster database. RAG knowledge retrieval pipelines, LlamaIndex, LLM model evaluation within labeled dataset. Hybrid Search, multiple retrievers including graph(Nebula Graph), ranking(manticore), evaluating results. Prompt engineering, optimizing for token limits/costs with various models, including self-hosted. Post-Training optimization for production(quantization, vLLM, etc) for Large Language Models. Data Lake architecture: Apache Spark, Apache Metastore/Thrift, SQL, PySpark, Trino, Dbt, ELT/ETL pipelines. Luks encyption. OpenZFS filesystem planning, tuning, benchmarking/fio, snapshots management. Big Data storage/tables: Polars/DuckDB/Parquet tables, Delta Lake data, S3/MinIO/other backends. Distributed messaging: Apache Kafka ecosystem, configuration, benchmarking, Spring Boot, kafka-python integration. Redis Streams, pub-sub queus, pyhton Celery, nodejs Bull task managers. gRPC Distributed Microservices: low latency distributed gRPC systems, REST gateway endpoints(Envoy proxy, Gin HTTP, etc). Programming Languages: expert in NodeJS/React, Python3. Express, Prisma/GraphQL, python LLM frameworks such asLlamaIndex, Langchain utilities, Asyncio, polars/PyTorch/NumPy, FastApi/Flask/SQLAlchemy/Jinja2, Celery. C++. Java(Spring Boot, Kafka, etc), Maven, Scala. Frontend and Mobile Development: expert in NodeJS/TypeScript ecosystem, NextJS 13, React, React Native, Expo framework, frontend(MaterialUI, Mantine, Apache Echarts, etc), Apollo/GraphQL, experience with Ruby on Rails, python Django/Streamlit. Databases: SQL(MySQL, PostgreSQL, Spark SQL/Trino connectors), MongoDB. Big Data, Distributed databases: Apache Iceberg/Delta Lake Layer/Hive Metastore/S3 backends, Clickhouse. Elasticsearch, Manticore(Sphinx) for low latency fulltext Search and Ranking. Security: Knowledgeable in security practices and tools, including security scans, monitoring, virtualization,VirtualBox, Vagrant, VPN/Wireguard, iptables configuration and routing, TCP/IP analysis. HTTP/REST: NginX(lua), Apache, PHP tuning, SSL, OpenAuth, Authelia, Keycloak, OpenAPI/Swagger/Codegen. Infrastructure monitoring/reporting: Systemd, Graphite/statsd, Promeheus, Apache Superset, Grafana, ELK stack.