Improvements in CI/CD/CT solutions:• I created a custom Blue-Green deployments that improved the production stability up to 99% and CI/CD stability up to 100%;• I reduced costs of CI/CD/CT solutions in 15 times;• I created custom solutions for a quick rollback deployment/s in real-time and without downtime. This solution has repeatedly saved a ton of time;• I made the release process up to 95% faster than before• I Improved speed for CI/CD/CT solutions up to 70%;Optimization and resource cutting for the cloud environments:• I created a custom tuning for the Kubernetes clusters which reduce costs in 15 times per year;• I created a specific custom solution for cloud resources (AWS, GCP, DO) which reduce costs for 50% per year.Documentation:• I have written many guides that explain the complicated topics in very simple words and schemas for every employee. This solution helps other employees to understand the projects.

- Deploying and managing applications using VMs, Docker containers, and Kubernetes- Designing and implementing infrastructure architecture- Managing deployment automation using GitLab and CI/CD builds for reliable operations- Ongoing architecture improvements, scaling, and troubleshooting- Using Git for SDLC, including release management and version deployment- Database maintenance, troubleshooting, and support- Supporting production environment, messaging services, networks, and monitoring tools- Supporting the full cycle of development process- Experience with cloud integration, Node.js, Angular, and Blue-Green deployment- Implemented and executed various testing methodologies, including manual testing and automation tests, which significantly improved coverage- Experience with IaC using Ansible, Terraform, and monitoring tools such as Nagios and Datadog- Experience with Medical images handling using DICOM/HL7, Dimse, and Dicomweb protocols- Built over 25 microservices and used advanced technologies such as Vision Machine Learning with TensorFlow, loose coupling through PubSub Messaging, and auto-scaling microservices through Kubernetes- Utilized Node.js, Koa.js, Angular 7, PostgreSQL, BigQuery, Dialog Flow, and TensorFlow as part of the technology stack.

- Network & servers monitoring, administration and troubleshooting;- Developer and infrastructure support;- Support for: Linux Debian/Red Hat/Centos (Exim, Postfix, Bacula, Apache, Squid, Nagios, MySQL, Bash), ESXi, Citrix, Hyper-V, Cisco/Mikrotik network devices, Microsoft (Windows Server, Exchamge, MSSQL), technical documentation (creation, filling in, editing etc.);- Also used the next tools to automate work: Chef, Git, Python, Django, Powershell, 3CX, Unix FreeBSD, PostgreSQL, MongoDB, Zimbra.- Full support AWS and DO infrastructure.- Provided consulting services.

- Improving project architecture to handle heavier workloads;- Investigating and incorporating new technologies into ongoing projects;- Providing production support and resolving issues;- Managing the delivery process of applications and updating them;- Automating tasks that were previously done manually;- Creating data visualizations, organizing and analyzing project metrics.

- Support and configure new servers to Linux- Configuring/Optimization Monitoring for services- Analysis, optimization, elimination of system operation risks- Automation of routine tasks- Cooperation with developers- I Identified market opportunities and define product vision and strategy- Understood customer needs and gather product requirements- Developed and launch new products and enhance existing products- I Engaged closely with the engineering and marketing teams to help determine the best technical implementation methods as well as a reasonable execution schedule- Technology stack: Debian, Centos, AWS (EC2, RDS, Lambda, CloudWatch, Firehose), Ansible, Nginx, HAproxy, PHP-FPM, Mysql, Elasticsearch, Zabbix, Grafana, Graylog, Prometheus, Git, GitLab CI.

- Support and maintenance of existing company infrastructure;- Monitoring and managing IT systems;- Primary diagnostics of equipment malfunctions, ensuring the operability and safety of the company’s network;- Inventory of IT equipment;- Setting up servers and network equipment;- Prompt troubleshooting.

- Support and development of the L2/L3 network - more than 10 thousand units of active; - Edge-Core/BDCOM (PON) equipment, dozens of Juniper/Cisco root routers;- Implementation of new services and technologies to automate routine tasks;- Testing and integration of new equipment and new services;- Network Troubleshooting;- Implementing monitoring tools;- On-call