Devops Engineer Software Development

OLEXANDR TYMOSHENKO

Fremont, CA ***** 510-***-**** *******@*****.***

SENIOR DEVOPS ENGINEER

Strategic & technical leader with 20+ years’ progressive experience, including software development, IT operations, and systems instrumentation—passionate about shortening systems development lifecycle, driving continuous delivery with high-quality software. MS, Physics, Dnipro National University (Ukraine). HIGHLIGHTS

● Thrive in Startup Environments: At Caption Health and Flywheel, served as lead DevOps professional at maker of 1st & only FDA-cleared AI-guided medical imaging acquisition system, wearing many hats and executing what’s needed to get job done (e.g., backend engineering, systems administration)—and embracing customer-focused mindset.

● Big Picture Vision: Design, build, and optimize automation systems that operate web, mobile, cloud-based platforms; stay abreast of industry best practices, DevOps trends, emerging technologies; drive implementation of best practices—while researching & onboarding technology tools, services.

● Customer-Focused: Have launched production-quality applications in Agile environments at Flywheel, Caption Health, Alation, Fitbit.

● Creative Problem-Solver: Proven individual contributor; thrive in shifting environments, handling nebulous problems, often with little direction.

● Technical Acumen: Hands-on experience with cloud automation, test-driven development (TDD), continuous integration

(CI), and open-source software (OSS); scripting experience with Python, Ruby, Bash; significant background working with public cloud technologies.

● Dedicated to Continual Improvement: Regularly challenge status quo; continually ask, how can we do this better?—then execute on solutions.

SIGNATURE STRENGTHS

Cloud Configuration / Automation / Orchestration (AWS,GCP,Azure) • Automating Continuous Integration / Delivery ( AzDO,Jenkins,GitLab ) • Configuration Managements (Ansible, Chef, Puppet) / Server Templating (Docker) / Container Orchestration (Kubernetes,Helm,ArgoCD) • Infrastructure Provisioning (Terraform,Terragrunt) • Developing Self-Service Solutions • Launching Production-Quality Applications • Distributed Systems / Scalable Architecture • Large Software Systems • Skilled Programmer • Persuasive Communicator • Infrastructure as Code • Digital Health PROFESSIONAL EXPERIENCE

DevOps Cloud Engineer (contract, via Apex Systems), PacificLife; New Port, CA; May 2023 - March 2025 Performed infrastructure engineering at a big insurance company:

● Intensively used Terraform Ent. (1.2.4): developed modules Lambda, Relational Database Service (RDS): reviewed and modified and created own examples and tests, added VPC, subnet, sec. groups, tested on TF created Linux and Windows instances, simple SQL tests for RDS;

● Implemented project “Flexera agent upgrade”: get image from Flexera admin and put it to artifactory, modified agent deployment AzDO pipelines (extensive scripting bash on Linux and PS1 on Window), e-bridge lambda agent deployments, GAMI process scripts;

● Intensively used Ansible: upgrade Ansible Automation Platform to 2.4; use Event Driven Ansible (EDA) for agent enforcement for Linux (AL2, AL2023, Redhat8, Centos, Ubuntu 22, 24) and Windows (2019 and newer);

● Used AzDo pipelines for patching AWS Cloud Linux and Windows instances for 150+ accounts: monitored monthly patching AzDO pipelines; corrected Linux bash and Windows PS1 scripts for failing AzDO pipelines/releases;

● Created, modified and used AzDO Repos and Pipelines for running Releases, Wiki, Boards;

● Implemented project “Account Owner tag ReAuth Workflow” by MS Power Automate: multiple flows: import data, send email with AdapCard, get HTTPS response, calendar trigger runs;

● POC using Terragrunt to support multi cloud AWS, GCP, Azure platform Kubernetes apps with cross-account/platform gates;

● Used Python 3.9 boto3 and CLI for AWS: a) python cleanup Lambda versions; b) upgrade cli-reporter bash script tool;

● Participated in on-call rotation and used MS tools, MyApps, Service-now, CyberArk, QuickSight, Azure Key Vault;

● Performed regular AWS operations: updated SQS Metric Alarm to v2; added AWS Nucleus role and permissions: tested, applied over AzDO and Terraform Enterprise pipelines, resolved tainted account enrollment (AWS Control Tower, Organizations),build inventory of Lambda versions and upgraded Lambda’s runtime (Python 3.7 EOL) Continued on page 2

OLEXANDR TYMOSHENKO – PG. 2

Senior Infrastructure Engineer, Fletch AI; San Francisco, CA; Jul 2022 - Feb 2023 Performed Infrastructure engineering at a cyber security company making platform that customized resource fo AI solution

● Supported deployment of dev., test and prod sites on GKE over GitLab repository using ArgoCD (Kubernetes/Helm)

● Developed and supported Jenkins pipelines for building and testing docker images

● Imported all GCP project resources to terraform with terraformer

● Prepared training on using Jenkins->GCP_build->Docker as CI tool

● Created Python-GitLab-Jenkins solution for informing merge request reviewers about changes in upstream repositories

● Used GCP logs for debugging and troubleshooting apps

● Created and implemented automated solution for release

● Performed weekly releases and ad hoc hot-fixes

● Created and implemented Jenkins CI dockerized solutions for unit testing golang and QA python testing with playwright

● Monitored status of pods and applications over scripts and grafana

● Fixed terraform for CDN solution

● Optimized Kafka topic partitioning

● Participated in replacement of kubernetes cron jobs with Airflow DAGs project

● Implemented CI for dynamic refreshing of maxmind DB

● Modified helm charts for implementing new python ingester into Kafka topics

● POC using ArgoCD CLI for release process, POC of GitOps for terraform

● POC migration of Jenkins to a new GKE cluster/namespace

● POC replace kubernetes port forwarding with kube-forward Remote Platform Engineer, Flywheel Exchange; Minneapolis, MN; Aug 2020 - Jan. 2022 Performed DevOps engineering at a company making platform that empowers healthcare providers with new capabilities.

● Supported deployment of dev., sandbox and production sites on AWS over GitLab repository Terraform pipelines

● Supported big pharmacological customer

● Planned and migrated platform deployments to new AWS accounts

● Piloted usage of hosted mongodb, planned migration from EKS pod based to hosted mongodb

● Piloted migration from KIAM to IRSA

● Piloted cross cloud (GCP->AWS) data ingest

● Modified HELM ConfigMap templates for Deployments to allow extra env. variables

● Resolved failure to create VM (EC2 instance) for dynamic engine

● Troubleshooted Elastic Network Adapter traffic jam by ethtool exceeded limits Cloud Watch metrics

● Troubleshooted FSX Luster traffic performance slowness

● Configured EKS access and created external instance for optimal backup/restoration mongodb

● Created GCP python Cloud Function to restart stuck GitLab pipelines Senior DevOps Engineer, Caption Health; Brisbane, CA; Nov. 2018 – June 2020 Performed DevOps engineering, backend engineering, systems admin at company making AI software that empowers healthcare providers with new capabilities. Released from position due to economic ramifications from COVID-19.

● DevOps: Designed, launched log integration of on-premises infrastructure; migrated on-premises ML infrastructure to GCP; analyzed, launched Limit IAM permissions in legacy GCP project. Planned, designed, migrated BLAST product (buckets, GKE, Django, SQL) to separate GCP project.

● Designed and planned migration of GCP provisioning from Ansible to Terraform

● Piloted use of Google Transfer Appliance (GTA). Supported remote partner infrastructure.

● Collected, deidentified, optimized, transferred medical data for ML training.

● Developed and debugged Ansible playbooks, roles for GCP. Provisioned and configured GCP projects, resources.

● Prepared test project for data engineers with Orthanc PACS server.

● Created SFTP server with signed URL for data exchange.

● Ensured optimal performance by manipulating Jenkins job Timeout parameters.

● Piloted usage of Argoproj Kubernetes orchestration. Authored design documents; documented solutions, user manuals.

● Backend Engineering: Employed Ansible roles for management of on-premise infrastructure; supported storage on premises / partner-side: upgraded firmware; coordinated shipment of RAID 6 disk sets.

● Designed transportation of partner file collections.

● Backed up and transferred ultrasound studies to GCP over GTA: Transferred production 40Tb to GCP; modeled partner conditions; debugged failure of using SSH tunnel for managing GTA, followed bug resolution.

● Piloted Google Healthcare datastore; ran remote setup and configuration of infrastructure on partner-premises. Continued on page 3

OLEXANDR TYMOSHENKO – PG. 3

Senior DevOps Engineer, Alation; Redwood City, CA; Jan. 2018 – Nov. 2018 Served in senior engineering / individual contributor role at technology company providing data catalog & data governance solutions, working on DevOps engineering, release engineering, IT.

● DevOps: Designed, launched AWS email cost-notifier; used Job DSL to generate Jenkins job; employed AWS, Jira python classes; created LDAP, Cloudability python classes; used destination emails per activation-type: manual or cron.

● Debugged Terraform provisioning and cleaning of AWS DBs resources in Jenkins jobs

● Changed Chef recipes, developed InSpec testing to cover changes; built new app, connector, packaging Jenkins slaves; tested and launched on Jenkins server; monitored job; conducted bash scripts-style checking, adjustment.

● Changed Job DSL/ ran Selenium Jenkins job with optimized time-to-live EC2 instances with failed test in test-bundles.

● Modified AWS resource sweeper Jenkins job for runaway jobs.

● Developed procedure to create customized EC2 instance with drives / security groups, LoadBalancers, DNS over CLI.

● Wrote, ran code to install application on systems with nonstandard home directory, shell for chrooted accounts.

● Release Engineering: Designed release (PR) technological card; controlled merging PRs; updated submodules.

● Prepared and presented Confluence page with Jira / GitHub queries for go / no-go meetings; controlled signoff; cut new production branches: Jenkins, GitHub, Confluence; authored and delivered training on “How to backport.”

● IT: Designed, installed networking & conference room systems for (2) new offices: Redwood City, CA; Chennai, India; imaged new laptops; trained new-hires in JumpCloud, G Suite, OpenVPN, Jira, Confluence. Lab DevOps Engineer (contract, via TEKsystems), Fitbit; San Francisco, CA; Feb. 2017 – Dec. 2017 Designed, launched firmware automation testing lab project. Launched cloning for Mac station setup; applied Ansible roles to configure Mac stations. Trained new-hires. Migrated test racks to new location; reconfigured power setup.

● Developed, tested, installed script solution for automatic DNS updates in AWS Route 53.

● Designed new lab rack setup / allocation; modular tracker setup; tracker universal binder.

● Setup grid test infrastructure on Lenovo / Ubuntu; installed USB / IP for Ubuntu test stations.

● Setup scales test infrastructure; fulfilled and setup Smartwatch and Thor test infrastructures.

● Launched Ubertooth test environment; tested RF tent / box and BLE retransmission-level with Sordera, Ubertooth.

● Resolved overheating smartphones used in Thor test infrastructure.

● Designed, documented all testing in Sketchup, LucidChart.

● Developed shell and Python scripts to analyze Jenkins reports and automate tracker configuration. Cloud Network Engineer (contract via TEKsystems), PayPal; San Jose, CA; Nov. 2016 – Feb. 2017 Led migration project, OVS to LinuxBridge; installed VM environment (controller, compute nodes) with Pinocchio KVM platform; modified facts, employed puppet modules. Configured ILO for HP blades in lab environment.

● Developed and debugged roll-out / -back scripts for bonding for Ubuntu, RedHat; modified puppet modules.

● Installed RHEL on bare metal HP blade with DHCP, TFTP, PXE, Kickstart technology.

● Implemented grub multiboot, multi-disk environment on bare metal HP KVM hypervisor.

● Deployed test Ubuntu-system from production image of disk with different geometry.

● Configured test environment of Nicira NVP, VMware NSX including manager, controller, gateway, service node.

● Developed and debugged testing scripts to check Openstack neutron (nets, subnets, ports, security groups and rules). DevOps Engineer (contract, via Intelliswift), Intuit; Mountain View, CA; Aug. 2016 – Nov. 2016 Led migration data extraction system project: evaluated ACLs; developed and launched SSH tool recipe for MS Windows servers; modified and used default and deploy recipes for Linux / Windows servers. Created and ran deploy, start / stop jobs on RunDeck for servers. Debugged deploy-PowerShell recipe, scripts. Senior UNIX System Administrator, Logitech; Newark, CA; Sept. 2006 – July 2016 Served in heavy project management capacity, with some DevOps responsibility; served as AWS Administrator, 2013 – 2016, building instances and ASGs; served as Linux RHEL, Debian, Ubuntu Administrator, 2006 – 2016).

● Migrated production servers between datacenters (IBM, Equinix, Switch): Performed cabling for power, console, networking, storage; mounting, re-/dis-mounting hosts; planned rack layouts, 3rd-party engineer visit; remote hands.

● Transitioned production servers from VMWare to AWS: Led migration between datacenters, from physical to VM, VM to AWS; patching DEV, QA, PROD AIX, Sun, Linux; urgent security patching. Implemented reporting system.

● Piloted Gamification project: Led successful pilot demo project in Ubuntu / Ruby on Rails. EDUCATION

MS, Physics, Dnipro National University; Ukraine

TECHNOLOGY:

Virtualization: AWS, GCP, OpenStack, VMWare, Docker. Unix: RedHat, Ubuntu, Mac, Commvault, VMware. Non-Unix: Windows 2008/22 incl. Active Directory. Languages: Python, Bash, AWK, Sed, Perl, PowerShell, C. Network & Security: Design & configure Cacti, Zabbix, Nagios, Splunk; install, tune firewalls; install, configure Cisco routers / switches.

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