Senior Java Developer

4/2022 – 7/2022

Entwicklung einer Product Information Management (PIM)-Lösung für einen Major Deutscher Verlag und Medienhändler

Senior Java/Kotlin-Entwickler mit Spring Boot, Kotlin, Microservices,
Reaktive Streams, Mongo DB, AWS EC2, MySql, RabbitMQ, Docker, Agile
Verantwortlichkeiten:
- Entwicklung stabiler Exporter als Microservices für verschiedene externe Kunden, verantwortlich für das Empfangen, Umwandeln und Versenden von Produktinformationen Queue-Systeme, SFTP, HTTP etc.
- Teilnahme an Schätzungsmeetings zu neuen Features und Updates
- Bereitstellen und Überwachen neuer Komponenten in Testumgebungen und
Produktion

Java (allg.), Kotlin, Spring Framework

2/2020 – 4/2022

IOT backend for a worldwide IOT devices system + backend for mobile app
Backend developer - Java, Kotlin, C++, MQTT, Kubernetes, Gradle, Google Cloud,
Spring Boot, Kafka, Postgres DB, Flyway, Elastic Search, Groovy/Spock, ELK
Responsibilities:
- refactor a monolith app into a microservice architecture
- develop a scalable system for handling mqtt commands and http requests

Java (allg.), Kotlin

3/2018 – 2/2020

developing a warehouse management/inventory system for multinational retail
corporation
Full stack developer using Java, Javascript/Typescript, Thymeleaf, Spring Boot, Kafka,
Postgres DB, Flyway, Elastic Search, AWS S3, Logstash, Kibana, Groovy/Spock,
Rancher
Responsibilities:
- developing a microservice based backend for the mobile app used by workers in the
warehouse
- optimise warehouse flows and picking times, inventory goods reception, delivery, receiving
and organizing shop orders

Amazon Web Services (AWS), Elasticsearch, Java (allg.), JavaScript-Entwickler, Spring Framework

5/2017 – 2/2018

developing a shop and product management system for a self checkout system
Full stack developer using Spring Boot, Java, Kotlin, Microservices, Angular +
Typescript, React, Redis, PostgreSQL, Docker Swarm, REST API
Responsibilities:
- developing a microservice based architecture for the backend serving a self checkout
mobile app and web based admin interfaces
- building a frontend to view real time positions of customers, status of shops and carts,
handle product availability
- building an algorithm to rate customer trust based on their shop behaviour and cart activity

Java (allg.), Kotlin, Angular

7/2016 – 5/2017

Worked as Full Stack Developer - Postgres DB + Java + Spring Boot +
AngularJS/Frontend
Integrating with external APIs to agreggate invoices, payments etc. for a petroleum industry company.

Angular, Java-Entwickler, Postgresql, Spring Framework