Freelancer profile translated to English.

Description

Software Architect and Lead Fullstack Developer with over 20 years of project experience in the development and modernization of complex software systems.

I support companies in the conception and implementation of scalable cloud-native architectures, the migration of monolithic systems, and the development of high-performance microservice platforms. My focus is on backend systems with Java/Kotlin and Spring Boot, as well as on AWS-based serverless and container architectures.

I work hands-on in implementation, simultaneously taking on architectural responsibility and supporting teams through coaching and technical leadership. In previous projects, I have significantly reduced infrastructure costs, increased system stability, and sustainably improved development processes through CI/CD and automation.

I quickly familiarize myself with new technical and business contexts, make well-founded architectural decisions, and utilize modern AI-supported development methods to efficiently support implementation and decision-making.

Languages

German
Native or bilingual
English
Fluent
Spanish
Basic

Workplace preferences

Remote only

Primarily works remotely

Transportwesen
Senior Software Developer
TRANSPORTATION
January 2026 - April 2026 (3 months)
Frankfurt am Main, Germany
Maintenance and stabilization of a monolithic backend system based on Java and JBoss
Conception and implementation of modern microservices with Kotlin and Spring Boot
Development of performant web frontends with Angular and TypeScript
Further development of native Android applications with Kotlin and Jetpack Compose
Integration of secure authentication and authorization mechanisms (Keycloak, OAuth2, JWT)
Implementation of asynchronous, event-driven communication using RabbitMQ
Systematic use of AI-supported development to accelerate implementation, tests, and refactoring with improved code quality
Spring Boot Microservices Kotlin Node.js Android Development
Bluetooth Hardware / IoT
Software Architect / Lead Fullstack Developer
INTERNET OF THINGS (IOT)
March 2021 - August 2025 (4 years and 5 months)
München, Germany
Building scalable architectures on AWS (Serverless, Lambda, API Gateway) with a reduction in infrastructure costs by approx. 30%
Development of stable BLE-based mobile applications for iOS and Android with over 99.8% connection stability to hardware
Conception and implementation of secure REST APIs with Java, Kotlin, and Spring Boot
Development of modern web frontends with React and Vue.js for configurable IoT dashboards
Technical leadership, coaching, and mentoring of development teams (4-5 people)
Introduction and establishment of AI-supported development approaches in the team to accelerate implementation, improve test coverage, and reduce development efforts
Spring Boot Kotlin iOS Development Android Development AWS Serverless
Zugangssysteme
Senior Software Developer
TECH
June 2022 - March 2024 (1 year and 9 months)
Salzburg, Austria
Development of distributed microservices with Java and Spring Boot for processing large transaction volumes
Implementation of asynchronous communication via RabbitMQ to reduce system latencies by approx. 35%
Development of an analytics application with Vue.js and Chart.js for visualizing measurement data
Development of simulator applications (Swift, Java) for automating Bluetooth communication tests
Setup and automation of CI/CD pipelines (GitLab, Kubernetes, Helm) for end-to-end testing and deployment processes
Introduction of Prometheus and Grafana for proactive system monitoring
Spring Boot Microservices Bluetooth Low Energy Vue.js Java