Andrew Tkachenko Email & Phone Number

Toronto, On, Ca

Moscow, Russia

- Mentoring, coaching backend and mobile DevOps team of 5 persons. Introduced Code review practice,Changelogs and Readme for all Devops projects.Add practice of Post Mortem Practice after major prod incidents.- Refactor, rewrite or retire existing pipelines for backend and mobile apps. Decreased apps build time by almost half from 12 min to 4 min.Created and maintained AWS resources using Infrastructure as Code (IaC) tools such as Terraform, improving efficiency and reducing manual efforts.- Introduced new tool ArgoCD for CD process to accomplish gitOps of releasing backend services. Which reduced time to prod from two days to 10 minutes.Successfully deployed and managed Kubernetes clusters using Amazon EKS, enabling seamless containerized application deployments and auto-scaling based on demand.- Designed and implemented a highly available and scalable EC2 Auto Scaling group with custom Amazon Machine Images (AMIs) to support a mission-critical application, ensuring 99.99% availability and reducing downtime by 50%.- Migrated on-premises applications to AWS ECS using Docker containers, resulting in a 50% reduction in infrastructure costs and improved scalability and reliability.Developed and executed migration plans to move on-premises applications to AWS cloud, resulting in improved scalability, reliability, and cost savings.- Implemented AWS RDS (Relational Database Service) for managing and scaling MySQL and PostgreSQL databases, including configuring multi-AZ deployments, automated backups, and database monitoring using Amazon CloudWatch.- Designed and implemented a cost-effective backup and archival solution using S3 and Glacier, reducing data storage costs by 40% while ensuring data durability and compliance between different AWS Regions.

Moscow, Russian Federation

- Develop gitbaci pipelines for building containerised applications in Java (Spring Boot), JavaScript (React JS), C#. First introduction of new micro-services, Camunda BPMN technologies for backend office which leads to rapid grow of releases cycles of two releases per month.- Successfully deployed and managed Kubernetes clusters on VMware ESXi with 99% uptime and zero security breaches.Number of testing environments increased from 2 (Prod and Test) to almost 50+ environments with 150+ micro-services in each due to flexibility of deployment process.- Create from scratch new Helm charts (templates and libraries) to deploy apps under different environments.Streamlined and automated application deployments using Helm charts, reducing deployment time by 40% and minimizing human error in the deployment process.- Implement DevSecOps for micro services deployed in Kubernetes using SySdig and Aquasec products. Adopt Hashicorp Vault secret management for secure configuration management and Single Sign On mechanism for micro services using Keycloak.- Implemented Docker containerisation for a monolithic application, reducing application deployment time by 50% and improving application portability and scalability.- Logging and Log Analysis with ELK and Grafana Loki: - Participation in Saturdays releases cycles of the exchange backend office, preparation of release cards and installation manuals, ordering network access, approvals for Request for Changes, writing scripts and consulting on deploying details of PROD and UAT environments.-Implemented a robust logging solution using the ELK (Elasticsearch, Logstash, Kibana) stack and Grafana Loki. Created from scratch monitoring and observability using Prometheus and Grafana, reducing incident response time by 50% and improving application performance by 30% through proactive monitoring and alerting.

Paris Area, France

- Work with Amazon Compute resources : EC2 instances, server-less framework : Lambda functions and Beanstalk.Achieved better amazon compute utilisation by using Spoitinst elastic scaling service.Achieved better Compute utilisation in average 40% reduced in costs by using Spoitinst elastic scaling service.- Monitoring alerting and performance optimisations using different tools: Scalyr, ELK stack, Prometheus-Grafana, Amazon CloudWatch based on SNS and Lambda functions.- CI Integration of products delivery to different environments using Jenkins pipelines either declarative or scripted (groovy, bash).- Assist developers with integration to a new product delivery using Kubernetes workflow. Write documentations with examples and how-tos for Kubernetes manifests. Support with technical advises regarding of capability of created Kubernetes cluster.- Work with Chef as automation configuration management tool to prepare different environments.Follow up on subsequent chef bootstrap runs of managed nodes to achieve better recipes execution and resource utilisation. Develop new Cookbooks-Recipes using kitchen knife suite of tools.- Implemented S3 buckets for storing and managing large amounts of data and Amazon Cloud Front CDN for deployment of static content from S3 bucket, set up data retention and lifecycle policies, and optimised S3 performance using Amazon S3 Transfer Acceleration, resulting in cost savings and improved data retrieval times.- Implemented DNS failover and latency-based routing policies using Route 53, ensuring high availability and low-latency access to applications for users worldwide.

Russian Federation, Moscow

Senior Support Engineer- Work within helpdesk hd.lanbilling.ru within SLA requirements- Pre-sales for Internet and Telecom service providers regarding technical aspects of product- Development of parsers (python,perl,bahs) for data import from CDR files according technical specification of PBX equipment.- Manage company Data Backup via backup software Bacula (scheduling,restoring,archiving,storage planning)- Development of IVR, Dial-plans (static and dynamic) for PBX with integration to different services and API’s (soap,json,Rest)- Responsible for tutoring on site and remotely new customers regarding product functionalities and features- Responsible for design and implementing, configuration, follow-up and support of telephone system between several branch offices of company- Joined team of IPtv product development as tester and adviser to release final product- Technical writing and revision of product documentation for website,knowledge bases,wikis and internal company blogs- Responsible for integrating billing system with Telecom equipment PBXs MVTS(Swithcray),Eltex Smg 1016\2016 ECCS,Asterisk,Avaya Communication Manager,Cisco CUCM,FreeSwitch- Development of scripts and tests to imitate the product issue to fulfill requirements for a bug report- Development of scenarios of mass product installation and administrating using Ansible,Puppet,Chef,bash scripting and python- Joined team for Cloud product development using XEN, OpenStack, Docker with the following administration of cloud environment including updating, provisioning and monitoring of containers- Responsible for company network company infrastructure which included HP Layer3 Switches,Dlink DES (series),DHCP servers,DNS, WebServers (Apache,Nginx),Vpns(IpSec,OpenVPN),Databases (MySQL,PostgreSQL)

Russian Federation, Moscow

- Advise developers on all technical aspects of xmpp protocol- Data gathering to achieve best solution for further project development and expansion- Follow up and configuring of project employees roles within LDAP directory- Responsible for company security using openLDAP,netfilter IPtables,auditd,Fail2Ban- Monitoring and locating bottle neck inside projects using Icinga and Graphana- Integration with buongiorno sms service use in customers relations by configuring ssmc channel between buongiorno gateway and projects kannel gateway.Development of scripts for parsing access log for further message routing- Participate in integration of customer service using WhatsApp,facebook manager, telegram,vk social network transports for Leroymerlin Kosino mall and Auchan chains- Responsible for preparation of virtual machines,containers for deployment, and testing of new features using Docker and Ansible Cheff Puppet- Installation and configuration of xmmp servers Ejabberd and Openfire (as backend application)- Installation and configuration transports gateway (project fronted) for messaging services like WhatsApp,Facebook Messenger,AIM,VK,Telegram,Skype and etc..- Responsible for Databases (MySQL,PostgreSQL) Administration " deployment, backup, troubleshoot,performance tuning and etc.- Responsible for DNS zones, HTTP load balancing, SSL-certificates followup and installation.- Implementing and Integrating SLA for customers relationship using help desk software "OTRS"- Setup and configure email accounts for employees

Suez Governorate, Egypt