Alexander Zerbe nicht verfügbar bis 01.09.2021

Alexander Zerbe

DevOps & Software Engineer - IT-Consultant

nicht verfügbar bis 01.09.2021
Profilbild von Alexander Zerbe DevOps & Software Engineer - IT-Consultant aus Niedernhausen
  • 65527 Niedernhausen Freelancer in
  • Abschluss: nicht angegeben
  • Stunden-/Tagessatz:
  • Sprachkenntnisse: deutsch (Muttersprache) | englisch (verhandlungssicher)
  • Letztes Update: 08.07.2021
SCHLAGWORTE
PROFILBILD
Profilbild von Alexander Zerbe DevOps & Software Engineer - IT-Consultant aus Niedernhausen
SKILLS
Engineering and Management:
  • Agile Software Development (Scrum, Kanban, Reviews, Knowledge-Sharing, Extreme Programming)
  • Software Architecture
  • Functional Programming
  • Behaviour- & Test-Driven Design
  • DevOps Engineering (Continuous Integration & Delivery)
  • Site Reliability Engineering
DevOps:
  • CICD: Gradle, Maven, Jenkins, Gitlab-CI, Azure DevOps, GitHub Actions, AWS Services
  • Automation: Terraform, AWS Cloudformation & SAM, Ansible, Shell-Scripting, Infrastructure as Code, Infrastructure as a Service
  • Orchestration: Docker, Kubernetes, Helm & Go-Template
  • Monitoring: Prometheus & Grafana, ELK-Stack (Elasticsearch, Logstash, Kibana, Fluentbit, Filebeat), Distributed Tracing
  • Cloud: Amazon Web Services (AWS), Azure Cloud
  • Security: Keycloak, Vault, AWS Cognito
Programming:
  • Go: Serverless (AWS Lambda), Web-Technologies, Microservices, CLI-Tools (Cobra), Kubernetes Operator pattern, operator-sdk
  • Java: Spring, Micronaut, Apache Kafka (Confluent Stack & KSQL)
  • Other: Python, C/C++, Haskell, Shell-Scripting
Technologies:
  • Various: Linux & POSIX, MacOS, Git, WebServer (Apache, nginx & traeffik), Istio
  • Databases: SQL, AWS DynamoDB, Apache Cassandra, MongoDB, CouchDB
  • Cloud: AWS Serverless, AWS Webhosting (S3, CloudFront, API-Gateway, Cognito, Amplify), Azure Services (AKS, CosmosDB)
  • Dezentralized Messaging Systems
PROJEKTHISTORIE
  • 12/2020 - bis jetzt

    • aqube GmbH - Customer Project
    • < 10 Mitarbeiter
    • Internet und Informationstechnologie
  • Project Lead, Software Engineer and IT-Consultant
    • Design of an on-premise, backend system with focus on portability to Amazon Web Services.
    • Setup and configuration of Keycloak as OpenID-Connect provider for authentification and authorisation. Including the implementation of custom policy enforcers and access rules based on RBAC and GBAC patterns for different clients.
    • Development of different backend services and APIs with the Go programming language and Git, Keycloak, MinIO and MongoDB as service components.
    • Continuous integration, build automatisation and containerisation for the backend service (GitHub Actions).

  • 07/2020 - bis jetzt

    • Internet Agency
    • 10-50 Mitarbeiter
    • Marketing, PR und Design
  • DevOps, Software Developer and IT-Consultant
    • Consultancy of the Go developer team on topics such as testing, project and package structure, concurrency, dependency management and general best practices.
    • Technical design and implementation of an AWS serverless backend (Lambdas, Step-Functions, API-Gateway and DynamoDB) with a microservice-like approach, written in Go, AWS SAM and Cloudformation stacks.
    • Configuration of multi-module Go projects for local development with testing, local API and database, test-data and hot-reloading.
    • Definition and automatic rollout of distributed AWS services (Cognito, CloudFront, S3, Route53) through Cloudformation.
    • CI/CD through Gitlab-CI pipelines for multiple micro frontends.
    • Migration of existing software (backend \& frontend components) deployments from HashiCorp Nomad to Kubernetes (Helm).
    • Automation of build and deployment processes using Azure DevOps pipelines and Azure ContainerRegistry for Docker containers and Helm charts.
    • Automation of multi-stage deployments to separate Azure AKS (Kubernetes) clusters and namespaces.
    • Definition and rollout of distributed Azure Cloud services through HashiCorp Terraform.
    • Installation and configuration of multiple software packages in AKS Clusters (Helm Charts) like Redis, Elasticsearch, Istio and CertificateManager.
    • Coordination of external service providers and development of a complex Helm Chart for a multi-step Magento2 (E-Commerce Platform) deployment.

  • 07/2018 - bis jetzt

    • aqube GmbH
    • < 10 Mitarbeiter
    • Internet und Informationstechnologie
  • Entrepreneur & Managing Partner
    • Design and implementation of various build and deployment processes under the use of web-service proxies, Jenkins, GitLab-CI, Docker and Kubernetes.
    • Integration of repository, build and test infrastructure into existing authentication and Data-services.
    • Log and event-monitoring for systems and services in a highly agile CI/CD environment with Elasticsearch, Kibana and filebeat.

  • 08/2018 - 10/2020

  • DevOps & Software Engineer
    • Agile software engineering and development of cloud native Java microservices.
    • Responsibilities for automation of development, test and release processes through DevOps principles. Including code quality assurance, security checks, dynamic build environments, credential management, migration tasks, rollback strategies and staging concepts.
    • Construction of an dynamic, staged and automated End-to-End testing environment for microservices.
    • Ressource, cost optimizations and monitoring.
    • Member of the team-overlapping DevOps department.

  • 09/2018 - 07/2020

  • DevOps, Software Developer and IT-Consultant
    • Agile software engineering and development of data-intensive, scalable and cloud native Java microservices with Apache Kafka as backbone for the event-driven design.
    • Configuration and development of a user-interface application with credentials and access management through Keycloak.
    • Responsibilities for automation of development, test and release processes through DevOps principles. Including code quality assurance, security checks, dynamic build environments, credential management, migration tasks, rollback strategies and staging concepts.
    • Construction of a dynamic, staged and automated End-to-End testing environment for microservices.
    • Resource- and cost optimization for Kubernetes resources, including logging, monitoring and alerting.
    • Member of team-overlapping DevOps department.

  • 08/2018 - 02/2019

  • IT-Consultant
    • Design of a decentralized BigData platform with Apache Hadoop and Spark.
    • Creation of a prototype microservice for development and testing purposes.
    • Cluster automation through the usage of RedHat Ansible.

  • 07/2018 - 01/2019

  • Concept and Consulting
    • Design of a decentralized BigData platform with Apache Hadoop and Spark.
    • Creation of a prototype microservice for development and testing purposes.
    • Cluster automation through the usage of RedHat Ansible.

  • 04/2016 - 07/2018

    • Prime.com
    • 500-1000 Mitarbeiter
    • Marketing, PR und Design
  • Software Engineer
    • Software migration to a service-oriented architecture using Apache Isis, JHipster and Spring.
    • Modeling and implementation of a dynamically scaling streaming platform for document processing with Apache Kafka.
    • Modeling and implementation of a service for automatic creation and hosting of websites, written in AsciiDoc, for versioned documentation reference of Java projects.
    • Operation of the central automatic build and delivery pipelines and systems.
    • Assistance for Machine-Learning and AI Projects for Natural Language Processing.
    • Concept creation of a Machine-Learning approach to detect fake-news and automated systems in social networks.

  • 01/2015 - 04/2016

    • Prime-Research
    • 500-1000 Mitarbeiter
    • Marketing, PR und Design
  • System Administration Assistance
  • • IT-Support and inhouse maintenance.
    • Design, construction and maintenance of a world-wide opperating TV-System.
    • Automation of internal processes and delivery methods.
    • Maintenance and extension of a world-wide used ticket system.
    • Design and Implementation of several software projects for parsing and crawling different web services.


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Ab dem 01.09.2021 verfügbar.

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