Senior DevOps/SRE and Solution Architect

3/2020 – 12/2020

Complete rewrite of all automation code (ansible, salt, terraform, helm) from scratch
Complete infrastructure redesign (additional networks, security stuff etc) + migration
Complete modernisation of kubernetes environments (from centos7+kubespray -> ubuntu 20.04+rke)
Assistance with architecture and infra redesign + migration of the ‘secure’ internal zone
Redesign / Reimplementation of istio service mesh
Upgrade to helm 3
Various internal tooling dev mostly in python
Redesign of deployment system (from 1 massive deployment pipeline that deploys everything towards one per service)
Redesign / Implementation of the VPN setup (from OpenVPN -> WireGuard)
Usual firefighting / debugging / performance help for the platform
Various demos, training and Onboarding sessions

DevOps (allg.), Softwareentwicklung (allg.)

3/2017 – 9/2017

• Bespoke software consultancy focusing on time-series data collection and data visualization targeted at manufacturing and IOT applications
• Tech stack is almost entirely Erlang/OTP
• Still working on the tooling/getting the office setup
• Self funded/bootstrapped
• Ultimately folded as we ran out of runway

Datenbankentwicklung, Saas

9/2016 – 2/2020

Multi-Client work around Aservo‘s CI consultancy business
• Design / Implementation of POC setups as part of pre-engagement sales
• Huge mix of technologies and stacks (however redhat/jenkins/ansible/atlassian featured
in most)
• Capacity planning for the post-poc implementation, hiring
• Planned, wrote and held multiple multi-day workshops with Aservo staff for training (on
Ansible, security, low level(ish) linux, CI)
• Point of technical escalation across Aservo‘s various teams, often called in to help
triage complicated issues when the teams there run out of ideas
• Lead developer/architect for a planned security appliance (elixir/lua/c)
• Security assessment

Continuous Delivery, DevOps (allg.), Cyber Security, Red Hat Enterprise Linux (RHEL), Confluence, Python, Cloud Computing, Iaas, Schulung / Training (IT), Solution Architektur, Vorverkauf

3/2016 – 12/2016

Came onboard to help SF through some significant platform issues they were facing and built the capacity into the team to stabilize the high traffic (~400kr/s) platform
• Largely java/oracle (legacy) flume/hadoop (intelligence) and php|rails/mongo (clientdev) however some nodejs components and various OTS ETL platforms were kicking around.
• Redesigned and implemented the DFS using Gluster+ZFS
• Deconstructed and simplified a very large legacy deployment system (19 instances, 300+boxes / instance)
• Training / Mentoring technical staff on new tooling
• Some clientdev and integration work while I found suitable staff to do this full-time
• Jack-of-all trades style job due to the complexity of the environment and fragility

Apache Hadoop, ETL, Oracle-Anwendungen, DevOps (allg.), Java SE, Puppet, Storage, PHP, Ruby on Rails, Email Marketing

9/2015 – 1/2016

Joined the team at VouchedFor for 3 months to re-implement the entire infrastructure packaging and deployment system and to help gradually move them towards a devops culture
• Designed and Implemented full end->end infrastructure management and deployment
platform
• Tech: Terraform, AWS, RDS, Docker, Ansible, Jenkins, NGINX, CloudFlare
• Held weekly 'all hands' demos and sessions with the devs to upskill them in the various 'new' tools we'd implemented
• Lots of sessions to show development how adopting some new principles and tools enables them to respond quicker to business requirements, while keeping the burden of switching to these at a minimum, to enable BAU to continue with as little interruption as normal
• Teasing apart some very debt heavy environments, explaining why these are so dangerous to the implementors/business and guiding the way to best-practice
• Support and advice on performance tuning, deployment strategies and so on
• Removed a very clunky and slow vagrant setup, replaced with docker-compose

DevOps (allg.), Nginx, Docker, Amazon Web Services (AWS), PHP

9/2014 – 5/2015

Built a team to transition a very large govt project (150m gbp+ budget >100 devs) to an agile/devops culture
• Pipeline, Delivery and Automation architecture design and implementation
• TeamCity, Ansible, Puppet, Yum, Packaging, SCM etc etc etc
• Pushed for standardisation across all vendor and internal dev teams re: deployment+monitoring
• Tooling creation in Perl, Ruby, Python and a whole load of bash+make
• Mentoring+refactoring of the existing puppet codebase and begun the process of building proper orchestration around the legacy platform
• Playing inter-vendor politics, mostly won, helping to find good compromises otherwise
• Introduced weekly sessions with the business to demonstrate what we were doing and (more importantly) why
• Involved in the design and buildout of the ‘future’ platform using sane processes, while factoring in legacy constraints (e.g oracle, legacy integration)

Oracle-Anwendungen, Continuous Delivery, DevOps (allg.), Projektleitung / Teamleitung (IT), Bash Shell, Jenkins, Python, Ansible