DevOps - Cloud engineer

• Work with a team of AWS engineers to provide project teams with standardized
AWS accounts and secure network access to the existing data center. Accomplishments:
• Automated the process of creating new AWS accounts for project teams upon request, including provisioning of IAM rules, direct connections, endpoints, and security groups.
Skills Used:

1. Responsibilities:
   • Writing Terraform and Terragrunt code to create and configure AWS resources and modules
     for standardized account provisioning.
   • Collaborating with a team of AWS engineers to implement and maintain AWS account
     provisioning processes.

1. Responsibilities:
   • Lead the architecture and implementation of a new application within Google Cloud Platform
     (GCP).
   • Configure CI/CD pipelines and set up A/B testing using Nginx in the production environment.
   • Debug and troubleshoot issues with the application and ensure its scalability in the cloud.
     Accomplishments:
   • Successfully migrated the application to Kubernetes with Docker and implemented a CI/CD
     pipeline for reliable deployments.
   • Configured Nginx to support sticky sessions for A/B testing and enabled the simultaneous
     running of the old and new website in the production environment for user behavior analysis.
   • Acted as the sole DevOps member on a team of developers to architect and configure a
     scalable cloud environment within GCP.

Skills Used:

• Cloud architecture and migration to GCP and Kubernetes.
• Implementation of CI/CD pipelines and A/B testing using Nginx.
• Debugging and troubleshooting issues with applications in the cloud.

The responsibility of this project was to migrate from a Centos 6 environment, using Puppet and monolithic applications to move ahead to a containerized and automated environment using Docker for the container, Kubernetes for the orchestration of the containers, Terraform for the infrastructure as a code and Packer for the Centos 8 images.

Joining the t-online finance team working on creating the infrastructure and CI/CD environment for the application and connectivity to third parties.
Also, working alongside with the infrastructure team to build up the AWS landing zone to provide the organisation with the possibility to create AWS environments quickly with security and company standards and migrate Kubernetes hosted in the Datacenter to AWS using EKS.

Responsibilities
Working for the start-up, in a small team moving the applications from Heroku to AWS and Kubernetes
to enable the developers are similar working experience.

Accomplishments

Working on this project, I wrote terraform code to create and manage the infrastructure within AWS to
migrate the applications. That included services such as EC2 instances, SQS Queues, Elastic Search,
RDS, EKS and also services such as Kibana.

Skills Used

We were using Gitlab and Gitlab Pipelines for the version control and CI/CD. We migrated Heroku to
AWS as a main platform to make the scalable and multi-region with Kubernetes containerised
infrastructure and Terraform with Terraform for the infrastructure as a code.

Responsibilities
Working for the start-up, keeping the costs as low as possible is crucial. Therefore I was responsible
to implement an effective scaling and monitoring for the API so the application is not using a vast
amount of resources when it is not necessary and on the other side the customers have a smooth
experience even during peak times.

Accomplishments

Working on this project, I implemented a scaling of docker instances on AWS ECS with Lambda,
SQSQueues and Cloudwatch Events using Terraform and Cloudformation. Also monitoring the
availability of the service for the best possible customer experience via Cloudwatch and Grafana.

Skills Used

We were using Gitlab and Gitlab Pipelines for the version control and CI/CD. AWS as a main platform
to make the scalable and multi-region containerised infrastructure and Terraform with Cloudformation
for the infrastructure as a code.

Responsibilities
Working within a DevOps team assigned to different groups. My group was responsible for the API's.
As the first contact for the developers and management, it was my responsibility to enable a smooth
deployment and high availability of our API's to the customers.

Accomplishments

Using services for the infrastructure such as an RHEL cluster in an own datacentre and AWS
infrastructure rolled out with Puppet and Ansible. Enabling smooth deployment into all environments
using Jenkins pipelines for a new project. The application was deployed into Docker containers
managed by Kubernetes.

Skills Used

Creating Jenkins pipelines for new Docker containerised applications managed by Kubernetes within
a data centre running on RHEL and the AWS cloud service.

Responsibilities
The IT infrastructure moved into AWS. Part of my responsibility was to mature the infrastructure as a
Code. Managing the containerised applications in every environment and implementing monitoring to
identify issues ideally before occurring and the ongoing optimisation of the environment. Working
together with the Developers and standardise and automate the Pipelines including tests code and the
repeatable execution and possible rollback of deployments.

Accomplishments
Using AWS and multiple services as the ALB (Application Load Balancer), Auto Scaling, ECS
(Elastic Compute Cloud), Lambda, Cloudwatch and other provided services we were able to
accomplish a stable containerised platform enabling scalable and redundant applications. The
deployment of the applications with Bitbucket Pipeline and Jenkins allowing rollbacks to any
previous version.

Skills Used
Taking advantage of the AWS provided services to enable a scalable and redundant platform.
Optimising the Infrastructure as a Code using Terraform and AWS Cloudformation to implement best
practices. Avoiding mistakes by automating of recurring tasks with pipelines.

Project: Portal Rehoming in August 2016 to October 2017

Responsibilities
Working as a DevOps Consultant for the HM Revenue & Customs project. To realise the successful
migration and containerization of the applications into the cloud. Furthermore, the implementation of
infrastructure as the code was essential to use the benefits of the cloud like the scalability and
enabled a continuous pipeline to allow the developers smooth deployments.

Accomplishments
As a DevOps Consultant, it was my responsibility to work within an environment of DevOps
and developers to optimise the code, to provide a faster feedback loop and creating a resilient
infrastructure to get the best possible product.

Skills Used
Implementing and configuring of the new OpenStack and AWS cloud environment using tools like
Terraform and Ansible to roll out and maintain the Linux based (Ubuntu) environment. Using Packer
to create individual images and Docker to containers the applications. For the code, we were using
Github and Jenkins for the continuous testing, continuous integration and continuous delivery.

Project: Migration Away from Datacentred in August 2017 to September 2017

Responsibilities
Working as a DevOps Consultant on a crucial project within HM Revenue & Customs. The project was
created to bundle all resources to move before a deadline from a previous supplier to AWS.

Accomplishments
Bundling all available DevOps, we managed to move within the given timeframe from an
OpenStack environment managed with Puppet into AWS using Terraform. During this
migration, we had to write the code for the infrastructure within AWS, creating images with
Packer and test those with Kitchen. Creating a pipeline with Jenkins to automatically build the
images, test the configuration of the images, feed AWS with those and to create auto scaling
groups which created the single Linux (Ubuntu) instances.

Skills Used
Migration of existing Docker containers from OpenStack into AWS. Using Terraform for the
infrastructure code. Packer for the image creation. Jenkins for the test, integration and deploy
pipeline. Kitchen to check the image configuration and Github for the code.

Responsibilities
Working as a DevOps Consultant on different projects for the implementation of a continuous
integration and continuous delivery. To realise those projects, I was using and gathering experiences
in Windows and Linux based (Debian) environments with technologies like Jira, Confluence, Git,
Filefactory, Jenkins, Cloudbees, or Microsoft Team Foundation Server and also cloud services as
AWS.

Accomplishments
As a DevOps Consultant, it was my responsibility to install and configure the Automic products
at first hand on customer site and to manage our testing environment in AWS.

Skills Used
Installing, configuring and working with the Automic products Automation Engine and Automic
Release Automation, I used the implement Continuous Delivery processes into existing
environments. Due to the implementation into the existing environments and using the existing
services, I worked with products like Git, Jenkins and Microsoft Foundation Server.

Responsibilities
Supporting the contact center solution product. That includes the maintenance of the Windows Server
and Client (Performance, Issues), Network (Troubles, Analyze) and the troubleshooting of Failover
environments by analyzing the Logs. To make the work more efficient, I create scripts automate
processes, Second- and Third-Level-Suppor to customers.

Accomplishments
As a System Engineer, I am part of a team taking care of a smooth and stable key functionality of our
software in the server environment.

Skills Used
Working with Windows based Server and Clients, I am working to solve troubles with our product on
the server site. To address those problems and to understand the behaviors of the system and
software I need to analyze the logs and server statistics.

Responsibilities
Installing, configure and fixing the Linux and MacOS server based environment. The MacOS server
has services like DHCP, VPN, File-sharing, and OpenDirectory. The Linux servers are using, for
example, Jira, Confluence, Fisheye, Crowd, Endian Firewall, Kerio E-Mail Server or Oracle
Databases.

Accomplishments
As a Linux System Administrator, I am working with the Linux server environment and help our
developers to keep the server running fast and stable.

Skills Used
Working with MacOS based clients and installing, configure and fixing the Linux (CentOS, pfSense)
and MacOS (10.8-10.10) based server. Maintenance and repair the server environment and services
of Atlassian products (Jira, Fisheye, Crowd, Confluence), an Endian based Firewall and Kerio based
e-mail server. Also, I configured MSSQL and Oracle Database.

Responsibilities
Moving Windows XP infrastructure with Windows Server 2000 to Windows 7 with Zentyal as Server
Active Directory (based on Ubuntu and Samba).

Accomplishments
The company hires me to migrate the old Windows Server 2000 and Windows XP environment to
a new Windows OS and a low-cost Server solution.

Skills Used
Installing and configure Zentyal as Active Directory, Backup Server, Firewall, and DHCP.
Installing and connecting new Windows 7 clients to Zentyal as a domain.

Responsibilities
I was working with ticket systems like Jira and OTRS for mainly second level support. The
support included maintenance of servers, support of colleagues and external clients.

Accomplishments
As a Junior System Engineer, I supported our developers in-house with their client or server problems.
That contains installing, configuration or fixing Linux and Windows based server mostly. Furthermore, I
was working on projects. This projects consist of projects like the company wifi in a new office or
building a new office IT infrastructure for clients.