Олег

Oleg Sharudin

Contact info: Phone: [открыть контакты](см. выше в блоке «контактная информация»), Telegram: @Oleg_avenger

Date of birth: 19 August 1989 (35 years)

Location: Ukraine, Vinnytsia

Profile Summary

Technical experience summary: ● 15 years in the IT industry. Technical skills & experience as a
Technology Manager, Platform Engineer, DevOps Engineer, SRE Team
Leader, Service Operations Engineer, System Administrator.
● 2 Years of experience as a Technology Manager (SOC and SRE teams).
● 7 Years of experience with Cloud Technologies - Amazon Web
Services. Learning GCP and Azure.
● Experience working in SCRUM teams. Familiar with ITIL Methodology.
● Major Incident Management on production platforms at scale.
● A good problem solver with a humble & inquisitive approach.
● Has spent a lot of time on self-learning and upscaling skills using
different resources, including Udemy courses, and LinkedIn Learning.
AWS, Terraform, Ansible, Docker, Kubernetes, and Helm certificates
are in a LinkedIn profile.
● Good Linux knowledge, running Raspberry PI projects as a hobby.
● Experience in generating, installing, and managing SSL/TLS
certificates using various Certificate Authorities (CA) like Let's
Encrypt, DigiCert, and AWS Certificate Manager..

Tools and technologies: ● Programming languages: Python, Bash scripting, PowerShell
● Technologies: Kubernetes, Docker, Terraform, Ansible, Atlantis, ELK
Stack, Cloudflare, WAF Incapsula, GitHub, Splunk, SSL certificates.
● Tools and middleware: CI/CD - GitHub Actions, TeamCity, Jenkins,
Monitoring - AppDynamics, Splunk, Siren, NewRelic, PagerDuty,
Prometheus, Zabbix, Grafana, DataDog. Ticketing systems - Jira, Snow.
● Databases: RDS, DynamoDB, MongoDB.
● Platforms: AWS (EC2, Lambda, EKS, ECR, S3, SNS, SQS, Cloud Stack,
Lambda functions), GCP. Production Linux admin. (Ubuntu Server).

Foreign languages level: ● Ukrainian - Native speaker
● English - C1 English (Advanced)
Work Experience

Name of Employer: Ciklum, Just Eat Takeaway

Job Title: Platform Engineer

Date of Employment: 07.2022 - till current time

Project Description, Responsibilities, and Achievements:

Project Description:

Just Eat Takeaway is a leading global online food delivery marketplace headquartered in Amsterdam and
listed on the London Stock Exchange. As a Platform Engineer, was a part of the infrastructure team that
focused on architecting a reliable platform, collection and presentation of JET global platforms' logs, traces,
and metrics, as well as managed alerting services that monitor the health of JET environments for thousands
of engineers, with hundreds of thousands of end-users worldwide.

Responsibilities:

● Built and operated a secure, reliable, and resilient cloud platform that supports engineering teams'
daily activities (microservices deployments pipeline, monitoring, alerting, tracking changes).
● Gained in-depth knowledge of Amazon Elastic Kubernetes Service (EKS), maintaining several
clusters running key production workloads.
● Managed and configured underlying resources (node groups, cluster upgrades) and components
such as Istio and EKS addons (CoreDNS, etc). Managed network related services - VPCs, Transit GTW.
● Thoroughly analyzed and resolved platform issues, ensuring a comprehensive understanding before
mitigation. Provided 24/7 on-call support for teams and customers, managing alerts and incidents
using PagerDuty, ElastAlerts and ELK stack.
● Administered monitoring and logging tools, including Prometheus (+ AlertManager), Sentry, Grafana,
Graphite, AWS XRay, and cloud-based log ingestion services at a global production scale.
● Worked with the CloudFlare (creating rules for the ingress traffic), as well as AWS WAF rules and
SSL/TLS Certificate management with the AWS Certificate Manager + full lifecycle (order from
authority and its integration) + deployment and renew local certificates with the GHA Workflows.
● DDoS attacks and threats investigation with the Splunk and Cloudflare logs.

Achievements:

● Designed and built scalable EKS clusters from scratch, enabling seamless service deployment for
thousands of engineers using Terraform, Ansible, GitHub Actions tools.
● Successfully onboarded 5+ teams to EKS, improving deployment speed by 30% compared to EC2.
● Led a cost-cutting project to decommission legacy platforms, saving significant infrastructure costs.
● Provided 24/7 on-call support, ensuring the reliability of services for millions of users globally.
Tools and Technologies:

Programming languages: Python.
Technologies: Git, Github Actions, IaaC, Ansible, Kubernetes, Docker, Grafana, DataDog, Atlantis, TeamCity.
Tools and middleware: AWS CloudFormation, Elasticsearch, Amazon S3, AWS EKS, AWS EC2, ECS, ELK Stack.
Databases: RDS, Amazon DynamoDB.
Platforms: AWS..

Name of Employer: Ciklum, Just Eat Takeaway

Job Title: Technology Manager

Date of Employment: 03.2021 – 07.2022

Project Description, Responsibilities, and Achievements:

Project Description:

Just Eat Takeaway is a leading global online food delivery marketplace, headquartered in Amsterdam and
listed on the London Stock Exchange. As the Technology Manager of the Service Operations Engineers
team, the individual is responsible for overseeing the development and maintenance of the technological
infrastructure that powers the company’s platform. In this role, they manage engineering teams to ensure
that systems are scalable, efficient, and capable of supporting seamless operations for both customers and
restaurants.

Responsibilities:

● Promoted collaborative problem-solving, addressing mistakes without blame and celebrating
successes. Fostered a culture of learning, knowledge sharing, and open communication within the
team.
● Played a key role in decision-making for technological improvements, ensuring seamless operation
of critical systems (website, backend analytics).
● Collaborated with product managers, Senior SRE Engineers, and Senior Tech Managers to design
and implement production support solutions.
● Acted as a partner to the business, supporting a rapidly evolving global e-commerce platform.
● Hands-on SRE Engineer, providing direct technical support to the team.
● Documentation process management - creation of new documentation for the new features and
products using the Confluence and Backstage + GitHub.
● Creation of the requirements for the new features/products, communication with leaders of the
departaments and setting up a lifecycle plan for the features.
Achievements:

● Led and mentored a team of 6 UA Service Operations Center (SOC) engineers.
● Under the TM leadership, the team:
○ Delivered various automation solutions for the platform, monitored the platform and
reported any issues to the responsible teams.
○ Mentored and trained newcomers, ensuring they integrated well into the team.
● Actively participated in and led production meetings.
● Played a key role in the development of SOC team engineers by:
○ Organizing one-on-one meetings to provide feedback and guidance.
○ Building personalized learning paths for each engineer.
● Fostered an environment for engineers to grow, with some advancing from junior to senior roles.

Tools and Technologies:

Programming languages: Python.
Technologies: Git, IaaC, Ansible, Grafana, KIbana, DataDog, TeamCity.
Tools and middleware: AWS CloudFormation, Elasticsearch, Amazon S3, AWS EC2, Lambda functions, Jira,
Slack, PagerDuty.
Databases: RDS, Amazon DynamoDB.
Platforms: AWS, GCP.

Name of Employer: Ciklum, Moon Active

Job Title: SRE Team Leader

Date of Employment: 09. 2020 - 03.2021

Project Description, Responsibilities, and Achievements:

Project Description:

The Moon Active project was part of Ciklum, a global digital solutions company. Moon Active is known for
creating top-quality mobile games, including the popular game Coin Master, which attracts millions of daily
players worldwide. The company has grown rapidly and focuses on combining data science, advanced
technology, and creative game design to build casual games that connect people globally.

Responsibilities:

As an SRE Team Leader at Ciklum for Moon Active, the role involved leading the Site Reliability Engineering
(SRE) team, which was responsible for maintaining the reliability and performance of production
environments. Key responsibilities included:
● Monitoring and Control: Ensuring the availability of production services 24/7 and monitoring for any
potential issues.
● Troubleshooting: Acting as the escalation point for complex issues, working closely with product and
 development teams to resolve incidents.
● Documentation: Ensuring proper documentation of processes and maintaining standards for Network
Operations Center (NOC) activities.
● Setting up requirements for the new services and features (monitoring, KPIs, resources management)
● Collaboration: Working closely with cross-functional teams, including product, R&D, and support
teams, to ensure smooth operations of Moon Active’s infrastructure.
● Leadership: Overseeing a team of SREs, fostering a collaborative environment, and driving
continuous improvement.
● The SRE team’s goal was to support Moon Active’s production infrastructure to maintain game
performance and user experience

Achievements:

● Recruited, mentored, and developed 3 new SREs to senior-level positions.
● Led a team of 6 SREs, overseeing day-to-day operations and performance.
● Proactively reviewed and optimized monitoring systems based on business needs and incidents.
● Regularly updated and improved operational processes for the SRE team.
● Provided 1st and 2nd tier infrastructure and application support as needed.
● Collaborated with Product, R&D, DevOps, and Support teams to troubleshoot and resolve complex
issues.
● Provided a documentation process for our products and services.
● Set KPIs for services and created a monitoring for them using NewRelic and Coralogix.
● Was responsible for the Product/Features lifecycle.

Tools and Technologies:

Programming languages: Python.
Technologies: GitHub, IaaC, Terraform, Grafana, Kibana, Coral Logix, New Relic, Neo4J.
Tools and middleware: AWS CloudWatch, Elasticsearch, AWS Lambda functions, Jira, Slack, PagerDuty.
Databases: Amazon DynamoDB.
Platforms: AWS.
Name of Employer: Ciklum, Just Eat

Job Title: Service Operations Engineer

Date of Employment: 02. 2018 - 09. 2020

Project Description, Responsibilities, and Achievements:

Project Description:

Just Eat is a leading global hybrid marketplace for online food delivery, providing customers with an easy
and secure way to order and pay for food from their favorite restaurants. The SOC department was
responsible to be the “eyes” of the platform - to monitor, detect, fix or report about production issues. 3
Shift, 24 hours monitoring, AWS based platform across EU, AUS and UK timezones.

Responsibilities:

As an SOC engineer at Ciklum for Just Eat, the role involved following key responsibilities:
● Monitoring and Alerting: Ensuring the availability of production services 24/7 and monitoring for any
potential issues using ELK &/Or Graphite / Grafana.
● Troubleshooting: Using APM Tools in production; Operating a production Windows Environment;
Working with distributed cloud-based platforms;
● Major Incident Management on production platforms at scale;
● Automating of operational tasks / Processes using Powershell or other scripting languages;
● Chaos Engineering / Failure Injection Testing; Working with Relational and/or NoSQL data structures;
● Strong understanding of the HTTP/HTTPS protocols, including GET, POST, and other request
methods, response codes, and headers.
● Experienced in configuring and maintaining Virtual Private Network (VPN) protocols like IPsec and
OpenVPN to securely connect distributed systems.

Achievements:

● Grew from the SOC engineer to a Technology Manager in the same department.
● Implemented changes to the DR process which significantly enhanced it (3 AWS Lambdas written on
Python which worked with the AWS Cloudfront and to a failover in case the legacy HA-Proxy will be
down).
● Secured the rest of AWS production environments after QA24 environment keys leakage.

Tools and Technologies:

Programming languages: Python.
Technologies: GitHub, Grafana, Graphite, Kibana.
Tools and middleware: AWS CloudWatch, AWS Cloudformation, Elasticsearch, AWS Lambda functions, Jira,
Slack, PagerDuty, Splunk, AWS WAF, Certificate Manager.
Databases: RDS, Amazon DynamoDB.
Platforms: AWS.
My other experience includes:

Name of Employer: Onseo, DGN

Job Title: DevOps Engineer

Date of Employment: 04. 2017 - 02. 2018

● DGN Games is a ground-breaking leader in the Social and Mobile gaming industry. We’re focused on
delivering our players with an innovative, exciting & fun experience that satisfies their hunger for games.
● As a DevOps engineer, worked on a highly scalable backend and a massive data processing pipeline. Was
responsible for systems and infrastructures scale so it could perform at optimal levels. Worked with AWS,
Kubernetes, Docker, Jenkins, Redis, Python, Bash, MongoDB.

Name of Employer: Win-Interactive, Bwin.party digital entertainment

Job Title: Service Operations Engineer

Date of Employment: 12. 2013 - 04. 2017

● Bwin.Party Digital Entertainment was an online gambling company, formed by the March 2011 merger of
PartyGaming plc and Bwin Interactive Entertainment AG. Formerly the world's largest publicly traded
online gambling firm, it was best known for its online poker room PartyPoker, World Poker Tour and its
sports betting brand Bwin.
● As a SOC engineer, was responsible for monitoring and alerting 24/7 datacenter resources (on premise
servers) using Microsoft SCOM, Zabbix, AppDynamics and other monitoring systems. Was responsible for
the SSL certificates management and Active Directory administration, acted as a first point of contact, did
troubleshooting of issues.
● Network monitoring with the Nagios, Zabbix.
● Experience in generating, installing, and managing SSL/TLS certificates using various Certificate
Authorities (CA) like Let's Encrypt, DigiCert, and AWS Certificate Manager.
● Proficient in configuring SSL for web servers (Nginx, Apache) and load balancers to ensure secure
HTTPS communication.
● Expertise in setting up automated SSL renewal processes using tools like Certbot to minimize certificate
expiration risks.
● Capable of diagnosing and resolving SSL certificate errors (mismatches, expiration, trust chain issues)
using tools like OpenSSL, curl, and browser developer tools.
● Familiar with troubleshooting SSL handshakes and network traffic using packet analysis tools like
Wireshark and tcpdump.
● Skilled in configuring and managing secure network protocols including HTTPS, SSH, and IPsec.
● Proficient in firewall configuration and rules management to ensure secure inbound/outbound traffic,
leveraging security groups and network ACLs in cloud environments (AWS, Azure, GCP).
● Experience with configuring Virtual Private Networks (VPNs) for secure communication across distributed
infrastructure.
● Familiar with network monitoring protocols such as SNMP for tracking the performance of network
devices and services.
● Skilled in using packet capturing and analysis tools like Wireshark, tcpdump, and NetFlow to monitor,
diagnose, and optimize network traffic.
Name of Employer: AllBiz and Vinnitsa printing house

Job Title: System and Network Administrator

Date of Employment: 12. 2008 - 12. 2013

● Allbiz is an online business-to-business (B2B) and business-to-consumer (B2C) marketplace for
e-commerce. The company's key products are package services for business online promotion in the
territory of interest (a kind of business online promotion).
● As a system administrator was responsible for administering the local network, Cisco network routers and
switches, local server and file storage, Active Directory, 21 users PC. Was responsible for any related
hardware and software issues. Was reporting to the main system administrator located in Kyiv.

Education

University: Vinnytsia National Technical University (VNTU)

Degree: Computer Systems and Networks, Master degree

Graduation date: 06.2011

Certifications/Professional Courses

● Kubernetes for the Absolute Beginners - Hands-on - Udemy - Date: April 5, 2023.
● Certified Kubernetes Administrator (CKA) with Practice Tests - Udemy - Date: Dec. 3, 2023.
● Istio Hands-On for Kubernetes - Udemy - Date: 01/16/2024.
● Docker for the Absolute Beginner - Hands On - DevOps - Udemy - Date: March 23, 2023.
● Terraform for the Absolute Beginners with Labs - Udemy - Date: Dec. 15, 2023.
● Ansible for the Absolute Beginner - Hands-On - DevOps - Udemy - Date: 04/19/2023.
● GitHub Actions - The Complete Guide - Udemy - Date: Feb. 22, 2024.
● DevOps, CI/CD(Continuous Integration/Delivery) for Beginners - Udemy - Date: 12/17/2023.
● DevSecOps Fundamentals - Including Hands-On Demos - Udemy - Date: 09.2024.
● Leadership: Practical Leadership Skills - Udemy - Date: Jan. 23, 2023.
● Passport to Success: Navigating Leadership 4 Middle Managers - 6 online modules of the program were
delivered in 2-hour sessions twice per week distributed over three weeks. Ciklum - Date: 2024.
● Passport to Success: Take Off 4 New Managers - 4 Interactive half-day workshops with pre-work and
follow-up activities - Ciklum - Date: Jan 31, 2023.
● Master Microsoft PowerShell - Udemy - Date: September 20, 2024.
● Amazon Web Services Solutions Architect - A Cloud Guru (Linux Academy) - Date: 02.2018.
● ITIL Foundation certificate. - Linda.com - Date: 10.2013.
● C + + Programming courses - Vinnitsa National Technical University - Date: 06.2011.
● WEB Programming courses (CSS, PHP, JavaScript) - Artinov School - Date: 09.2017.
● Links to certificates you can find in Oleg Sharudin LinkedIn profile.