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Projects

March 2020 ­ todayFull stack three­dimensional aviation applicationGo backend, JavaScript, payment processing,geographical data

November 2019 ­ February 2020Designing and prototyping cost effective loggingsolutions for Metro­nom's global scale 24/7 multi­cloud infrastructure.Go, Google Cloud, Fluentd

April 2019 — October 2019Lead developer and team lead at a security techstartup in Utrecht. Structuring the developmentprocess: Streamlining DevOps, automatic testing andContinuous Integration, Continuous Deployment.Increasing OpSec. Coaching Developers.Go, AWS, Terraform

www.nosuchcode.comIng. Raphael Sprengerraphael@nosuchcode.com(+31) 68 13 100 33

github.com/raphting

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May 2018 — March 2019Designing and maintaining large and global scalelogging solution based on Elasticsearch, Kubernetes,and a multi cloud infrastructure for Metro­nom,subsidary of the Metro AG.Elasticsearch, Logstash, Kibana, Kubernetes, Docker,Prometheus, Consul, Puppet

October 2016 — March 2018Write software for DFS Deutsche Flugsicherung tovisualize radio frequency coverage of aviation sectorsin the German airspace. The software verifiably helpedsupervisors in control centers to reason correctly aboutcoverage and prevent closing sectors, thus preventingdelays for passengers and airlines.Backend Go, frontend Angular 2, JavaScript,WebSockets

October 2016 — February 2018Planning and development of a private cloud for MetroSystems, subsidary of Metro AG.Go, Microservices in Docker on Kubernetes, managedwith Helm, CI/CD with Jenkins and Travis CI, ElasticStack, Redis, Prometheus, Grafana, scripts in Python

April 2016 — August 2016Systems administrator for Linux at DFS DeutscheFlugsicherung GmbH. Planning the new e­mailinfrastructure, planning a new monitoring strategy.Postfix, Icinga2, Puppet, Linux­HA, Red Hat Enterprise,SuSE Enterprise

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Skills

Programming languages:Go, Python

Databases:Elasticsearch, MongoDB, SQL, Key­Value stores

Clouds:Google Cloud Platform (Certified by Google Cloud),AWS Amazon Web Services, Kubernetes with Helm(Docker), Serverless

Fields of experience:High availability and scalable architectures, distributedsystems, IoT, Aviation, Research

Operating Systems:Linux, UNIX

System Management:Ansible, Puppet, Icinga2, Prometheus, Grafana, ElasticStack (Elasticsearch, Kibana, Logstash), Consul, Vault,Terraform

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Trainings

— September 2019Receiving Privat Pilot License (PPL(A))— September 2018Google Cloud Certified ­ Professional Cloud Architect— June 2016Active Directory Services with Windows Server 2012R2 Microsoft Official Course 10969e— June 2016LINUX ­ Heartbeat2 High Availability Cluster, DFSAcademy— May 2016Configuring and Administering Hyper­V in WindowsServer 2012 Microsoft Official Course 55021e— April 2016Administering Windows Server 2012 Microsoft OfficialCourse 20411e— November 2015Secure e­mail servers with Postfix, Heinlein Academy— December 2014Digital Signal Processing Problem Solving withMATLAB, Helsinki Metropolia University of AppliedSciences— November 2014Software Security, University of Maryland— May 2013UNIX advanced course, DFS Academy— January 2013UNIX beginner course, DFS Academy

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