Backend & Cloud Engineer | Kotlin, Java, Spring Boot, Kafka, AWS, Kubernetes | Expert in Microservices Architecture & DevOps | Technical Lead
Aktualisiert am 22.10.2025
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 01.11.2025
Verfügbar zu: 100%
davon vor Ort: 20%
Software Architecture & System Design
Backend-Engineering
Cloud Architect
Kotlin
Java
Spring
Microservices Architecture
Event-Driven Systems
REST & GraphQL API Design
AWS
Google Cloud Platform
Docker & Kubernetes
CI/CD Pipelines
DevOps & Infrastructure as Code
PostgreSQL & MongoDB
English
Fluent
German
Fluent

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 years 10 months
2023-01 - now

FREELANCING

FREELANCER
FREELANCER
8 months
2025-01 - 2025-08

Backend Engineer

FREELANCER Backend Engineer TypeScript NestJS AWS (CDK ...
FREELANCER Backend Engineer

  • Designed and implemented access management platform handling thousands of IoT devices across multiple properties, ensuring secure, scalable operations
  • Architected backend services in TypeScript/NestJS on AWS, with CI/CD pipelines, Datadog monitoring, and microservice-based architecture
  • Drove project execution by breaking down complex requirements into actionable tasks
    • Enabled Limehome to securely manage access across hundreds of properties in multiple regions, reducing operational overhead and ensuring a seamless guest experience
TypeScript NestJS AWS (CDK SQS SNS) PostgreSQL IoT Docker Microservices GitHub Actions (CI/CD) Datadog Jira Confluence
Limehome
Berlin
2 years
2023-01 - 2024-12

Paketstationen

FREELANCE Lead Engineer Kotlin Spring Boot SQS/SNS ...
FREELANCE Lead Engineer

  • Architected and led development of an international parcel locker platform (from concept to MVP to multi-country rollout), enabling thousands of daily transactions and partnerships
  • Set up AWS infrastructure with Terraform, implemented microservices in Kubernetes, and introduced event-driven architecture with Kafka
  • Coordinated hiring, onboarding, and cross-functional requirement gathering.
  • Introduced Kafka and event driven architecture
    • Delivered a scalable logistics platform now operating across multiple countries, streamlining parcel delivery and enabling new revenue channels for GLS
Kotlin Spring Boot SQS/SNS Kafka Github Actions CI/CD AWS PostgreSQL Datadog Docker Kubernetes Microservices Jira Confluence Terraform Ktor
GLS/NXT
Berlin
1 year 7 months
2021-06 - 2022-12

Designed and implemented automated supply chain processes

Staff Backend Engineer Kotlin Java Spring Boot ...
Staff Backend Engineer

  • Designed and implemented automated supply chain processes, reducing operational bottlenecks and improving delivery efficiency
  • Introduced and documented company-wide Kafka adoption, enabling reliable event-driven communication across services
  • Mentored junior engineers, contributed to technical hiring, and authored RFCs shaping system architecture
    • Improved system scalability and reliability during Gorillas? hypergrowth, supporting thousands of daily deliveries across multiple markets
Kotlin Java Spring Boot GraphQL Kafka Github Actions CI/CD Google Cloud PostgreSQL MongoDB Datadog Docker Kubernetes Microservices Jira
Gorillas
1 year 7 months
2019-12 - 2021-06

Integration of commercetools platform for REWE digital

Java Engineer Java Reactive Programming Spring Boot ...
Java Engineer

  • Integration of commercetools platform for REWE digital. Synced prices, stocks, and products for over 200 merchants
  • Implementation of features and covering them with unit, integration as well as load tests
  • Microservices built with Java, reactive Streams, Spring & MongoDB
    • Improved data reliability and system performance, reducing product inconsistencies and enabling seamless shopping for millions of REWE customers
Java Reactive Programming Spring Boot Kafka Jenkins CI/CD Google Cloud MongoDB MySQL Docker Kubernetes Kibana Grafana Microservices Jira
Commercetools / REWE digital
Berlin
1 year 9 months
2018-02 - 2019-10

Implementation and maintenance of loyalty backend

Fullstack Engineer Java JavaEE AngularJS ...
Fullstack Engineer

  • Implementation and maintenance of loyalty backend for several clients
  • Anguar frontend, Java backend using PostgreSQL

Java JavaEE AngularJS Javascript Typescript PostgresDB Docker REST SOAP Protractor/Selenium Jenkins Jira
GK Software
Berlin

Aus- und Weiterbildung

Aus- und Weiterbildung

2013 - 2017:

COMPUTER SCIENCE
BSC COMPUTER SCIENCE
University of Applied Science Karlsruhe

Position

Position

Lead Backend Engineer

Kompetenzen

Kompetenzen

Top-Skills

Software Architecture & System Design Backend-Engineering Cloud Architect Kotlin Java Spring Microservices Architecture Event-Driven Systems REST & GraphQL API Design AWS Google Cloud Platform Docker & Kubernetes CI/CD Pipelines DevOps & Infrastructure as Code PostgreSQL & MongoDB

Produkte / Standards / Erfahrungen / Methoden

Profil:

  • I?m a backend engineer and technical leader, working with moderntechnologies like Kafka, Kotlin, Java, Spring Boot, GraphQL, mongoDB,SQL (and many more) in a microservice-based architecture
  • Teamplayer with an eye for detail


Skills:

  • Java and Kotlin
  • Spring Boot
  • Kafka
  • GraphQL, REST
  • PostgreSQL, Mongo
  • CI/CD
  • Datadog, Grafana, Kibana
  • Docker, kubernetes
  • GCP, AWS, terraform, helm
  • Documentation
  • Testing: Junit, Testcontainers, k6s
  • Typescript & node.js

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 years 10 months
2023-01 - now

FREELANCING

FREELANCER
FREELANCER
8 months
2025-01 - 2025-08

Backend Engineer

FREELANCER Backend Engineer TypeScript NestJS AWS (CDK ...
FREELANCER Backend Engineer

  • Designed and implemented access management platform handling thousands of IoT devices across multiple properties, ensuring secure, scalable operations
  • Architected backend services in TypeScript/NestJS on AWS, with CI/CD pipelines, Datadog monitoring, and microservice-based architecture
  • Drove project execution by breaking down complex requirements into actionable tasks
    • Enabled Limehome to securely manage access across hundreds of properties in multiple regions, reducing operational overhead and ensuring a seamless guest experience
TypeScript NestJS AWS (CDK SQS SNS) PostgreSQL IoT Docker Microservices GitHub Actions (CI/CD) Datadog Jira Confluence
Limehome
Berlin
2 years
2023-01 - 2024-12

Paketstationen

FREELANCE Lead Engineer Kotlin Spring Boot SQS/SNS ...
FREELANCE Lead Engineer

  • Architected and led development of an international parcel locker platform (from concept to MVP to multi-country rollout), enabling thousands of daily transactions and partnerships
  • Set up AWS infrastructure with Terraform, implemented microservices in Kubernetes, and introduced event-driven architecture with Kafka
  • Coordinated hiring, onboarding, and cross-functional requirement gathering.
  • Introduced Kafka and event driven architecture
    • Delivered a scalable logistics platform now operating across multiple countries, streamlining parcel delivery and enabling new revenue channels for GLS
Kotlin Spring Boot SQS/SNS Kafka Github Actions CI/CD AWS PostgreSQL Datadog Docker Kubernetes Microservices Jira Confluence Terraform Ktor
GLS/NXT
Berlin
1 year 7 months
2021-06 - 2022-12

Designed and implemented automated supply chain processes

Staff Backend Engineer Kotlin Java Spring Boot ...
Staff Backend Engineer

  • Designed and implemented automated supply chain processes, reducing operational bottlenecks and improving delivery efficiency
  • Introduced and documented company-wide Kafka adoption, enabling reliable event-driven communication across services
  • Mentored junior engineers, contributed to technical hiring, and authored RFCs shaping system architecture
    • Improved system scalability and reliability during Gorillas? hypergrowth, supporting thousands of daily deliveries across multiple markets
Kotlin Java Spring Boot GraphQL Kafka Github Actions CI/CD Google Cloud PostgreSQL MongoDB Datadog Docker Kubernetes Microservices Jira
Gorillas
1 year 7 months
2019-12 - 2021-06

Integration of commercetools platform for REWE digital

Java Engineer Java Reactive Programming Spring Boot ...
Java Engineer

  • Integration of commercetools platform for REWE digital. Synced prices, stocks, and products for over 200 merchants
  • Implementation of features and covering them with unit, integration as well as load tests
  • Microservices built with Java, reactive Streams, Spring & MongoDB
    • Improved data reliability and system performance, reducing product inconsistencies and enabling seamless shopping for millions of REWE customers
Java Reactive Programming Spring Boot Kafka Jenkins CI/CD Google Cloud MongoDB MySQL Docker Kubernetes Kibana Grafana Microservices Jira
Commercetools / REWE digital
Berlin
1 year 9 months
2018-02 - 2019-10

Implementation and maintenance of loyalty backend

Fullstack Engineer Java JavaEE AngularJS ...
Fullstack Engineer

  • Implementation and maintenance of loyalty backend for several clients
  • Anguar frontend, Java backend using PostgreSQL

Java JavaEE AngularJS Javascript Typescript PostgresDB Docker REST SOAP Protractor/Selenium Jenkins Jira
GK Software
Berlin

Aus- und Weiterbildung

Aus- und Weiterbildung

2013 - 2017:

COMPUTER SCIENCE
BSC COMPUTER SCIENCE
University of Applied Science Karlsruhe

Position

Position

Lead Backend Engineer

Kompetenzen

Kompetenzen

Top-Skills

Software Architecture & System Design Backend-Engineering Cloud Architect Kotlin Java Spring Microservices Architecture Event-Driven Systems REST & GraphQL API Design AWS Google Cloud Platform Docker & Kubernetes CI/CD Pipelines DevOps & Infrastructure as Code PostgreSQL & MongoDB

Produkte / Standards / Erfahrungen / Methoden

Profil:

  • I?m a backend engineer and technical leader, working with moderntechnologies like Kafka, Kotlin, Java, Spring Boot, GraphQL, mongoDB,SQL (and many more) in a microservice-based architecture
  • Teamplayer with an eye for detail


Skills:

  • Java and Kotlin
  • Spring Boot
  • Kafka
  • GraphQL, REST
  • PostgreSQL, Mongo
  • CI/CD
  • Datadog, Grafana, Kibana
  • Docker, kubernetes
  • GCP, AWS, terraform, helm
  • Documentation
  • Testing: Junit, Testcontainers, k6s
  • Typescript & node.js

Vertrauen Sie auf Randstad

Im Bereich Freelancing
Im Bereich Arbeitnehmerüberlassung / Personalvermittlung

Fragen?

Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

Das Freelancer-Portal

Direktester geht's nicht! Ganz einfach Freelancer finden und direkt Kontakt aufnehmen.