Author Image

Hello ~ Ivan

I am a tEchni[c]al gEek
I work pretty much with any technology stack
I talk the talk, and ulmiately w[A]lk the walk
I love to lean new stuff
Hacker OPSEC. STFU is the best policy.
How can I help your business?
Be obsessed. Go ALL in...
I can bring insights from other industries

Ivan Katliarchuk

Engineering Manager. SRE and Platforms at Holland & Barrett

Working as a technology professional for the last decade on various projects and an IT enthusiast by passion. I breathe technology and know-how to determine the real problem. Have a long history in software development e.g., Java, C#, Python, NodeJs, and Golang. My main responsibility is to provide a resilient, secure, and highly available platform for our products and services to run on, and that the overall strategy for a platform is defined and deliverd on time. I believe sharing knowledge is my way to make this world a better place.

Problem Solving

Communication

Leadership

Automation

Coding

Cloud Technologies

Tech Stack

Systems Architecture

Systems Architecture

Expert in Software and System & Platform Architecture. Services, Microservices and Serverless architecture.

Consulting

Consulting

I work with clients, big and small. Very much user centric and client focus. Tools come and go. It’s more about right mindset, capabilities, skills and continuous learning.

DevSecOps & SRE

DevSecOps & SRE

I find delivering advanced technology and software hardening to unexpected events coupled with automation to people of all skill levels to be absolutely fantastic.

Operations

Operations

Expert in fixing the cause, not the symptom. Day 2 ops and alerting solutions expert.

Programming

Programming

Proficient in Python, Shell, C#, NodeJS, Java, Golang and C for firmware development.

Cloud Computing

Cloud Computing

I work with AWS and GCE on daily basis and used to work with Azure.

Infrastructure as Code

Infrastructure as Code

Managing services in the cloud and any scale. I can help you with writing IaC, troubleshooting your code and setting up your workflows and IaC tools to be efficient.

Kubernetes

Kubernetes

I have experience with architecting and running on-prem/cloud HA K8s clusters. Cluster security, service meches and etc

Linux and MacOS

Linux and MacOS

I have been using Linux since before you heard of a modem.

Experiences

1

Engineering Manager. SRE and Platforms

Holland & Barrett

Oct 2021 - Present, UK, Europe, Remote

One of the world’s leading health and wellness retailers and the largest in Europe.

Responsibilities:

Maintain the connection to the big-picture vision/strategy and make it easier for a team to get things done.
Responsible for the overall health of the common infrastructure and platform which underpins company products and services.
Help to drive operations and automation to accelerate product delivery and ensure consistent and stable services through coordinating with technology teams
Define and Support company hyperscale platform strategy

Senior DevOps & SRE

Nearform - External Contractor to McKinsey

Dec 2019 - October 2021, UK, Europe, Remote

Global software consultancy, enabling our clients to deliver real and lasting business impact through design and technology.

Responsibilities:

Engineering solutions for projects of different size
Architecture, Platform design, DevSecOps and SRE leadership
Security, Disaster Recovery, Automation, Infrastructure as code, Operations
Managing and automating platform in multy tenant environment and hybrid clouds
Python, NodeJS, Golang, AWS, Kubernetes, Microservices, Serverless, DevOps, SRE, Agile

2

3

Technical Consultant

Armakuni

Apr 2018 - Dec 2019, UK, London, Remote

Specialist engineering consultants across Cloud Native technologies, practices and principles work with you to define and deliver your change journey.

Responsibilities:

Digital transformation
Private and public clouds automation
Infrastructure improvements, testing & security hardenin
Golang, Python, NodeJS, AWS, GCP, Microservices, Serverless, DevOps, Agile

Senior Engineer & DevOps

Hermes Group

Dec 2016 - Apr 2018, UK, Leeds

European delivery company operates acrross UK, Germany, Austria, Germany and Russia

Responsibilities:

Lead backend and infrastructure team
Serverless infrastructure using pipelines, configuration as code, containers on multiple cloud platforms as well as on-premise
Java, NodeJS, Android, AWS, Microservices, Serverless, DevOps, Agile

4

5

Senior Software Engineer

MHR

Apr 2015 - Dec 2016, UK, Nottingham

Build platform to streamline and transform HR and payroll processes.

Responsibilities:

Transformed a monolith to a microservice architecture
Migration applications from bare metal Solaris to Kubernetes
Java, JS, C#, Azure, SQL Server, Microservices, DevOps, Agile

Security Contractor

NDA

May 2012 - Feb 2015, UK, part-time contractor

Providing customers the freedom to innovate and run their businesses with minimal friction

Responsibilities:

Vulnerability, incident response, threat hunting, and monitoring platform
Vulnerability identification, remediation, and management reporting processes with IT squads and suppliers to manage risks/prevent
Hardening IT systems against real threats & Cloud Accounts Audits
Java, Python, AWS, DevSecOps, Honeypots & Firewalls, Audits, CIS, SOC2, PCI-DSS, HIPPA

6

7

Wondermentapps

2012 - 2015, Remote

Wonderment Apps builds superior digital products, and offers curated staffing resources for tech, product, and QA.

Sr. Lead DevSecOps Contractor

2014 - 2015

Drive technology leadership for: Stamps, iHerb, Nasa, Cast It, Stroy Scout, Casting Networks, Million Stories

Lead DevSecOps Contractor

2012 - 2014

Inspire customers and peers to solve difficult problems with innovative and novel solutions, leveraging an excellent set of technical competences.
Recommend migration strategies, enterprise architectures, migration tools, and cloud infrastructure required to successfully implement a complete solution using best practices
C#, Java, Python, NodeJS, AWS, Azure, DevSecOps, Agile

Engineer

Boots Care Support Pharmacy

Jan 2012 - May 2012, UK, Nottingham

Health and beauty retailer and pharmacy chain

Responsibilities:

Maintain the technical intellectual property in the Integration tooling and automation space
Automating deployment, scaling, and management, both in the cloud (AWS, Azure) or on-premise.
Java, Python, NodeJS, DevOps, Agile

8

9

Software Engineer

Wilkinson Hardware Stores

Jul 2011 - Jan 2012, UK, Nottingham

British high-street retail chain which sells homewares and household goods

Responsibilities:

Working with prototypes and proof of concepts and developing fully functioning applications
Producing rich front-end UI and efficient services
Java, Python, Agile

Software Engineer

Lukoil

2007 - 2011, BLR

One of the largest oil & gas vertical integrated companies in the world

Responsibilities:

Translating legacy business systems onto modern architecture, platforms and languages
Optimise Oil & Gas operations with advanced software solutions
Java, Big Data

10

11

Embedded Engineer

Radiovolna

2004 - 2007, BLR

Milti-profile industrial enterprise working in the field of electrical equipments

Responsibilities:

Working on the full product life-cycle of software for embedded systems
Play an integral role in the development of high-performance, real-time embedded product.
C, C++, Micro-controllers

Projects

Dotfiles

Owner June 2020 - Present

🔧 .files, including ~/.macos — sensible hacker defaults for macOS.

all configuration dotfiles macos os personal

Configuration

Owner December 2017 - Present

Configuration files.

all configuration os personal private

Obsidian Vaults

Owner December 2017 - Present

Obsidian vaults

personal private obsidian

Centralized Config

Owner December 2022 - Present

Scale configuration across multiple accounts

personal private infra config workshop

Knowledge Base

Owner March 2019 - Present

Public knowlege base.

academic documentation personal

Workshop: Terraform

Owner Dec 2019 - Present

AWS Workshop tutorials for Terraform

academic terraform cloud workshop terragrunt

Workshop: AWS Kubernetes

Owner Dec 2019 - Present

AWS Workshop tutorials for EKS, Terraform and Terragrunt

academic kubernetes workshop terraform terragrunt

Workshop: AWS EKS

Contributor Dec 2018 - Present

AWS Workshop tutorials for EKS.

academic kubernetes workshop eks

Training: kubernetes

Contributor Mar 2018 - Present

My personal kubernetes training and certifications e.g., CKAD, CKA, CKAS

academic kubernetes training

Workshop: Renovate

Owner Dec 2021 - Present

AWS Workshop tutorials for Renovate, Dependency Management

academic workshop renovate dependency update

Workshop: Helm v1

Owner Feb 2021 - Present

AWS Workshop tutorials for Helm

academic kubernetes workshop helm helmfile

Default community health files

Owner Mar 2021 - Present

accelerator github management blueprints

Base blueprint

Owner Apr 2021 - Present

Base blueprint.

accelerator blueprints base

Blueprint: terraform

Owner Sep 2019 - Present

Blueprint for terraform projects.

accelerator blueprints

Blueprint: workshop

Owner Sep 2019 - Present

Workshop showing you how to use blueprints.

accelerator blueprints workshop

Blueprint: vm(s)

Owner Nov 2019 - Present

Lorem ipsum dolor sit amet consectetur adipisicing elit.

accelerator blueprints vms

Blueprint: serverless

Owner Jan 2020 - Present

Serverless blueprint.

accelerator blueprints serverless

Blueprint: aws serverless function

Owner Jan 2020 - Present

AWS NodeJs serverless blueprint.

accelerator blueprints nodejs serverless

Blueprint: performance project

Owner May 2020 - Present

AWS NodeJs serverless blueprint.

accelerator blueprints performance

Blueprint: github action generic.

Owner May 2021 - Present

Github actions blueprint.

accelerator blueprints github action

Blueprint: github action typescrip

Owner May 2021 - Present

Github actions typescript blueprint.

accelerator blueprints github github action typescript

Automation: mixed pipelines helpers and mixins

Owner May 2020 - Present

Pipeline examples: Jenkins, CodeBuild, Github Actions and etc

automation helpers pipelines github actions codebuild jenkins

Infrastructure: my awesome kubernetes resources

Owner Dec 2019 - Present

Awesome kubernetes resources.

iac kubernetes

Terraform: aws eks profile module

Owner Dec 2019 - Present

Manages an AWS EKS Fargate Profile.

infrastructure kubernetes aws eks terraform

Terraform: aws cloudfront module

Owner Aug 2020 - Present

AWS Cloudfront distribution module.

iac terraform aws cloudfront

Terraform: aws kms module

Owner Nov 2020 - Present

AWS KMS module.

iac terraform aws kms

Terraform: aws lambda module

Owner Aug 2019 - Present

Deploy serverless function to AWS VPC.

iac terraform aws lambda

Terraform: aws enforce MFA module

Owner Jun 2020 - Present

Enforce MFA policy for AWS IAM groups and users

infrastructure terraform aws iam mfa

Terraform: kubernetes velero module

Owner Dec 2019 - Present

Manages Kubernetes Velero deployment

iac kubernetes velero terraform

Terraform: aws proxy nginx module

Owner Dec 2019 - Present

Deploy NGINX proxy with SSH

iac terraform nginx proxy

Terraform: helm release module

Owner Aug 2019 - Present

Wrapper for Terraform Helm provider

iac terraform helm

Terraform: aws IAM module

Owner Dec 2018 - Present

AWS IAM roles setup. TODO: move to terraform modules

iac terraform aws iam

Terraform: aws ECS module

Owner May 2022 - Present

Terraform module which creates AWS ECS resources.

iac terraform aws ecs

Terraform: aws ECR module

Owner May 2022 - Present

Terraform module which creates AWS ECR resources.

iac terraform aws ecr

Terraform: aws ECS bootstrap module

Owner July 2022 - Present

Terraform module which creates AWS ECS resources.

iac terraform aws ecs

Terraform: AWS GitHub OIDC module

Owner July 2022 - Present

Fully configurable terraform module to access AWS APIs from Github Actions through OpenID Connect.

iac terraform aws github oidc

Terraform: AWS GitLAb OIDC module

Owner July 2022 - Present

Fully configurable terraform module to access AWS APIs from GitLAb through OpenID Connect.

iac terraform aws gitlab oidc

Terraform: Documentation

Owner July 2022 - Present

All supported terraform modules in single repo.

iac terraform aws gitlab docs

iac: learn opa

Owner Dec 2022 - Present

Evaluate how to use opa.

iac opa aws kubernetes

Docker: tools

Owner Mar 2020 - Present

Docker tooling for multiple use cases.

vms docker tooling

Docker: compose starter

Owner Jan 2017 - Present

Lorem ipsum dolor sit amet consectetur adipisicing elit.

vms docker dcoker-compose

VM(s): boxes

Owner Sep 2019 - Present

Virtual machines used in hobbies and development environment(s). Packer, Vagrant

vms vagrant packer

VM(s): vagrant

Owner Jan 2017 - Present

Lorem ipsum dolor sit amet consectetur adipisicing elit.

vms vagrant packer

VM(s): factory

Owner May 2020 - Present

Assembling vms here.

vms vagrant packer ubuntu

VM(s): packer aws AMI with tools installed

Owner May 2022 - Present

Assembling AMI on AWS with Packer.

packer ansible flyway

VM(s): provision

Owner May 2020 - Present

Assembling vms here.

vms vagrant packer ubuntu kali whonix

Helper: tools and scripts

Owner Jan 2018 - Present

A collection of scripts

helper os scripts linux k8s aws python bash

Helper: automate code review

Owner Oct 2022 - Present

Automate code review

helper code-review js nodejs aws

Helper: kubernetes fixtures with examples

Owner Oct 2019 - Present

Kubernetes fixtures

helper automation k8s kubernetes blueprints fixtures yml

Helper: makefiles

Owner Jan 2019 - Present

Collection of directives used by a make build automation tool to generate a target/goal

helper scripts linux makefile

awscompute

Owner Jan 2022 - Present

AWS resources compute CPU&Memory and Instance count

aws go

Go: hackerrank challanges

Owner Mar 2018 - Present

Golang remote interview training & challanges

academic go training

NodeJS: protect IAM secrets

Owner Sep 2019 - Present

AWS protect IAM secrets. Delete when expired.

nodejs serverless aws

NodeJS: SNS to Slack subscriber

Owner Sep 2019 - Present

AWS SNS slack subscriber implemented in nodejs.

nodejs serverless aws

NodeJS: AWS Step function monitor

Owner Mar 2019 - Present

AWS Step function Cloudwatch monitor

nodejs serverless aws typescript

NodeJS: AWS Cloudwatch logs strem cleaner

Owner Setp 2019 - Present

A small module to streamline some of the cleanup operations required when when working with AWS CloudWatch logs

nodejs serverless aws

NodeJS: personal tutorials

Owner Feb 2017 - Present

NodeJS javascript screencast

nodejs tutorial

Python: national lottary probably winner

Owner Jul 2020 - Present

Playing with national lottery

python

Python: hackerrank algorithms

Owner Nov 2016 - Present

Hackerrank algorithm solutions in Python

python hrank algorithms

Python: AWS serverless networking debug

Owner Setp 2019 - Present

Serverless networking debug

python serverless aws debug

Cloud Init: examples

Owner May 2019 - Present

Industry standard multi-distribution method for cross-platform cloud instance initialization

all cloud init aws

Blueprint: artilerry project

Owner May 2020 - Present

Artillery is a modern load testing and smoke testing solution

accelerator blueprints performance argillery aws

Blueprint: K6 project

Owner May 2020 - Present

k6 is an open-source load testing tool for API performance testing

accelerator blueprints performance k6

Blueprint: gatling project

Owner May 2020 - Present

Gatling is an open-source load testing tool for web applications, designed for DevOps and CI

accelerator blueprints performance gatling scala

Pentesting: lerning examples

Owner Jan 2020 - Present

Learn penetsing practices

pentest python ruby academic

Fastlane: plugin upload to SauceLabs

Owner Aug 2021 - Present

Fastlane plugin to automate Sauce Labs build deployments and testing

fastlane ruby ios android automation

Load Generator

Load generator mparticle example

assessment python performance

Renovate: Universal dependency update tool

Contributor 2021 - Present

multiple issues and bug fixes

nodejs contributor automation

Toha: A Hugo theme for personal portfolio

Contributor 2022 - Present

multiple issues updated

toga hugo go contributor

is: Type check values

Contributor 2022 - Present

bug fixes and optimisations

nodejs contributor

Danger-js: Universal automated code review tool

Contributor 2022 - Present

bug fixes and optimisations

nodejs contributor automation

Crossplane(provider-aws): Crossplane AWS Provider

Contributor 2023 - Present

bug fixes, new features and improvements

go contributor automation iac

Traefik helm: Traefik Proxy Helm Chart

Contributor 2022 - Present

bug fixes and optimisations

helm contributor kubernetes

BDD styled unit test framework for Kubernetes Helm charts as a Helm plugin

Contributor 2024 - Present

bug fixes and added capabilities

helm contributor kubernetes test

Rest Api: hello-world

Owner Jan 2020 - Present

A simple REST Service.

nodejs rest hello-world academic

Education

		Open University UK 2020-Present BSc (Honours) Computing and IT Taken Courses Software engineering (TM354) Developing concurrent distributed systems (M362) Web, mobile and cloud technologies (TM352)
		Open University UK 2013-2018 Diploma of Higher Education in Computing and IT Taken Courses Algorithms, data structures and computability (M269) Web technologies (TT284) Software development with Java (M256) Object-oriented Java programming (M250) Technologies in practice (TM129) Discovering mathematics (MU123) My digital life (TU100)
		Yanka Kupala State University of Grodno 2000-2003 Radio Physics & Engineering Taken Courses Process modeling of micro-, opto-, and nanoelectronics Design Automation in Electronics Identification, access and surveillance systems Information processing methods

Achievements