Robin S. - Senior Cloud & Backend Engineer

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Stuttgart, Germany

Experience

Oct 2022 - Present

2 years 11 months

Ingolstadt, Germany

Senior Cloud & Backend Engineer

Media-Saturn-Holding GmbH

Implementation of applications with Kotlin and Ktor as microservices
Use of MongoDB in the MongoDB Atlas Cloud
Asynchronous communication of services with Google Pub/Sub
Use of Kotest and Mockk for unit tests
Development of a frontend for application administration with TypeScript, React, and Express.js
Use of Terraform for provisioning environments in Google Cloud Platform and delivering the development infrastructure
Implementation of CI/CD processes with GitHub Actions
Operation of scalable production and test environments in Google Cloud Platform using Kubernetes, Helm, Flux CD, and Google Pub/Sub
Monitoring of environments with Prometheus and Grafana
Delivery of BI data in the Google BigQuery data warehouse

Aug 2022 - Present

3 years 1 month

Lead Software Developer

Codeagle GmbH

Implementation of the backend with Java and Spring Boot
Development of a Java GraphQL client for the Monday.com third-party API
Operation of the application as a container in AWS ECS
Use of additional Amazon services like SQS, ELB, and CloudFormation
Implementation of the frontend as a Chrome browser plugin using TypeScript and React 18
Integration of the plugin into various social media platforms like Xing and LinkedIn
Automated tests with JUnit, Mockito, and WireMock
Implementation of the CI pipeline with automatic deployment to AWS in GitLab

Oct 2021 - Sep 2022

1 year

Frankfurt, Germany

Lead Software Developer

Deutsche Telekom IT

Agile approach using Scrum with project management in Jira
Implementation of the backend with Kotlin and Spring Boot
Use of Amazon SQS
Implementation of the frontend with TypeScript, Vue.js, and the in-house UI framework Scale
Automated tests with JUnit, Mockito, and WireMock
Implementation of the CI pipeline in GitLab
Delivery of the application as Docker images
Operation of the application in AWS

Nov 2020 - Sep 2021

11 months

Backend Developer

Fiducia & GAD IT (jetzt Atruvia)

Implementation of applications with Java and Spring Boot as microservices
Use of Oracle Database
Use of Postman for automated testing of the REST API
Use of JUnit for unit tests
Use of OpenShift to run in various production and test environments
Monitoring of production environment performance with Dynatrace and Graylog

Jun 2020 - Oct 2020

5 months

Software Developer

Bundesamt für Migration und Flüchtlinge

Specification of the application following Domain-Driven Design
Implementation with Java, Spring Boot, and Axon Framework
Implementation of logic using Command-Query Responsibility Segregation and event sourcing
Persistence of data in Oracle Database
Implementation of interfaces in REST and documentation in Swagger
Implementation of web interfaces with Angular and TypeScript
Version control with Git and Bitbucket

Feb 2020 - May 2020

4 months

Software Developer

Freelance

Implementation of the backend with Kotlin and Spring Boot as microservices
Service discovery and gateways with Eureka, Zuul, Hystrix, and Ribbon
Implementation of the message broker with RabbitMQ and Spring AMQP
Persistence using the NoSQL database Neo4j
Implementation of the web interfaces with Vue.js
Deployment with Docker and Docker Compose

Jun 2019 - Jan 2020

8 months

Software Developer / Atlassian Consultant

Die Schwenninger Krankenkasse

Automatic conversion of customer emails into Jira issues and automatic search in the customer database
Setup of a Solr search index and integration with Jira for full-text and field-specific search
Display of customer information in the Jira issue for case managers
Module for storing email templates and automatic sending of preformatted emails
Integration of external archiving systems
Implementation using Java, JavaScript, and Vue.js
Version control with Git

Mar 2019 - May 2019

3 months

Software Developer / IT Consultant

Scolution GmbH & Co. KG

Automation of the setup of Atlassian applications on cloud servers using Ansible and Docker
Installation and securing of Linux servers with Ansible
Implementation of the Ansible configuration and inventory files in YAML
Operation of the applications with Docker and Docker Compose
Monitoring with Prometheus and Grafana, and forwarding alerts to OpsGenie
Central collection and analysis of logs on a Graylog server
Implementation of scripts and backup mechanisms with Python

May 2018 - Jan 2019

9 months

Software Developer / Atlassian Consultant

Various Clients

Analysis and automation of business processes in Jira for clients such as Deutsche Flugsicherung, Deutsche Bahn, and others
Documentation of processes in BPMN or as flowcharts
Implementation of automated process steps with Groovy/Scriptrunner
Training on using Groovy/Scriptrunner and maintaining the automated processes
Unit tests with Spock
Development of Jira plugins with Java and Spring, and UI changes with JavaScript and Vue.js
Version control with Git

Mar 2016 - Jun 2017

1 year 4 months

Software Developer

essendi it GmbH

Development of an application for issuing, managing, and installing digital certificates in large enterprises
Modular structure of the application using OSGi and Apache Karaf
Implementation of backend services in Java and OSGi
Realization of the API as a REST interface
Persistence with Apache Jackrabbit
Frontend with JSF and PrimeFaces
Process control with Camunda BPMN Process Engine
Generation and processing of key and certificate files with BouncyCastle
Tests with JUnit and Selenium
Technical consulting for the product owner in the area of security and PKI

Jun 2014 - Feb 2016

1 year 9 months

Software Developer

Optima Packaging Group (essendi it GmbH)

Developed a web application with Java EE to manage maintenance manuals and intervals in special-purpose machinery
Provided REST web services for a GWT frontend
Used MySQL and Hibernate for persistence
Managed database schema with Liquibase
Used SVN for version control

Oct 2013 - May 2014

8 months

Software Developer

Hohenlohe aktiv Tours (essendi it GmbH)

Customized the Magento webshop for booking tours with date and quota management
Implemented a frontend wizard to select route, date, and number of participants with real-time quota checks
Automatically generated and sent gift card PDFs upon payment receipt
Displayed participant lists for specific days in the shop backend

Summary

I bring extensive experience in building modern cloud solutions with Kotlin, Java, and Spring Boot and have proven my skills in microservice architecture and the implementation of scalable cloud infrastructures in numerous projects. I'm especially strong in cloud technologies (GCP, AWS), continuous integration and deployment (CI/CD), and I have solid knowledge in frontend and backend development with modern frameworks like React and Vue.js. I most recently demonstrated my ability to successfully carry out complex projects from concept to delivery at Media-Saturn-Holding GmbH.