Robin S. - Senior Cloud & Backend Engineer

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Stuttgart, Germany

Experience

Oct 2022 - Present

3 years 1 month

Ingolstadt, Germany

Senior Cloud & Backend Engineer

Media-Saturn-Holding GmbH

Implemented applications using Kotlin and Ktor as microservices
Used MongoDB in MongoDB Atlas Cloud
Enabled asynchronous communication between services with Google Pub/Sub
Used Kotest and Mockk for unit tests
Developed an admin frontend for the application with TypeScript, React, and Express.js
Used Terraform to provision environments in Google Cloud Platform and set up the development infrastructure
Implemented CI/CD processes with GitHub Actions
Managed scalable production and test environments in Google Cloud Platform using Kubernetes, Helm, Flux CD, and Google Pub/Sub
Monitored environments with Prometheus and Grafana
Provided BI data in the Google BigQuery data warehouse

Aug 2022 - Present

3 years 3 months

Lead Software Developer

Codeagle GmbH

Implemented the backend with Java and Spring Boot
Developed a Java GraphQL client for the monday.com third-party API
Deployed the application as a container on AWS ECS
Used other AWS services like SQS, ELB, and CloudFormation
Built the frontend as a Chrome browser extension using TypeScript and React 18
Integrated the extension into various social media platforms like Xing and LinkedIn
Created automated tests with JUnit, Mockito, and Wiremock
Set up the CI pipeline with automatic deployment to AWS in GitLab

Oct 2021 - Sep 2022

1 year

Frankfurt, Germany

Lead Software Developer

Deutsche Telekom IT

Worked in an agile Scrum environment with project management in Jira
Implemented the backend with Kotlin and Spring Boot
Used Amazon SQS
Developed the frontend with TypeScript, Vue.js, and the in-house UI framework Scale
Created automated tests with JUnit, Mockito, and Wiremock
Set up the CI pipeline in GitLab
Delivered the application as Docker images
Ran the application in AWS

Nov 2020 - Sep 2021

11 months

Backend Engineer

Fiducia & GAD IT (now Atruvia)

Implemented applications with Java and Spring Boot as microservices
Used Oracle Database
Used Postman to automate REST API testing
Used JUnit for unit tests
Used OpenShift to run various production and test environments
Monitored production performance with Dynatrace and Graylog

Jun 2020 - Oct 2020

5 months

Software Developer

Bundesamt für Migration und Flüchtlinge

Specified the application using Domain-Driven Design
Implemented with Java, Spring Boot, and the Axon Framework
Built logic using Command-Query Responsibility Segregation and Event Sourcing
Stored data in Oracle Database
Implemented REST interfaces and documented them in Swagger
Developed web interfaces with Angular and TypeScript
Managed version control with Git and Bitbucket

Feb 2020 - May 2020

4 months

Software Developer

Freelance

Implementing the backend with Kotlin and Spring Boot as microservices
Service discovery and gateways with Eureka, Zuul, Hystrix, and Ribbon
Implementing the message broker with RabbitMQ and Spring AMQP
Persistence with the NoSQL database Neo4j
Implementing 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
Building a Solr search index and integrating it with Jira for full-text and field-specific search
Displaying customer information in the Jira issue for case handlers
Module for storing email templates and automatically sending preformatted emails
Connecting external archiving systems
Implemented with Java, JavaScript, and Vue.js
Version control with Git

Mar 2019 - May 2019

3 months

Software Developer / IT Consultant

Scolution GmbH & Co. KG

Automating the setup of Atlassian applications on cloud servers using Ansible and Docker
Installing and securing Linux servers with Ansible
Implementing Ansible configurations and inventory files in YAML
Running 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
Implementing scripts and backup mechanisms with Python

May 2018 - Jan 2019

9 months

Software Developer / Atlassian Consultant

Various Clients

Analyzing and automating business processes in Jira for clients like Deutsche Flugsicherung, Deutsche Bahn, and others
Documenting processes in BPMN or as flowcharts
Implementing automated process steps with Groovy/Scriptrunner
Training on using Groovy/Scriptrunner and maintaining automated processes
Unit testing with Spock
Developing Jira plugins with Java and Spring, and modifying the interface with JavaScript and Vue.js
Version control with Git

Mar 2016 - Jun 2017

1 year 4 months

Software Developer

essendi it GmbH

Developing an application for issuing, managing, and installing digital certificates in large enterprises
Modular design of the application using OSGi and Apache Karaf
Implementing backend services in Java and OSGi
Implementing the API as a REST interface
Persistence with Apache Jackrabbit
Frontend with JSF and PrimeFaces
Process orchestration with the Camunda BPMN process engine
Generating and processing key and certificate files with BouncyCastle
Testing with JUnit and Selenium
Providing technical guidance to the Product Owner in security and PKI

Jun 2014 - Feb 2016

1 year 9 months

Software Developer

Optima Packaging Group (essendi it GmbH)

Development of a web application with Java EE for managing maintenance instructions and intervals in special-purpose machinery
Provision of REST web services for a GWT frontend
Persistence with MySQL and Hibernate
Database schema management with Liquibase
Version control with SVN

Oct 2013 - May 2014

8 months

Software Developer

Hohenlohe aktiv Tours (essendi it GmbH)

Customization of the Magento webshop for booking tours with date and quota management
Implementation of a frontend wizard to select route, date, and number of participants with real-time quota checks
Automatic creation and sending of voucher PDFs upon payment receipt
Display of participant lists for specific days in the shop backend

Summary

I bring extensive experience in developing modern cloud solutions with Kotlin, Java, and Spring Boot and have proven my skills in microservices architecture and implementing scalable cloud infrastructures across numerous projects. My expertise in cloud technologies (GCP, AWS), continuous integration and deployment (CI/CD), as well as my strong knowledge in frontend and backend development using modern frameworks like React and Vue.js, stands out. I most recently demonstrated my ability to successfully deliver complex projects from concept to production at Media-Saturn-Holding GmbH.