KI/LLM-Integration, RAG-Systeme, Backend-Entwicklung (Java/Spring Boot, Python/FastAPI), Cloud-Infrastruktur (Kubernetes, AWS, GCP), CI/CD-Pipelines
Aktualisiert am 02.01.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 02.01.2026
Verfügbar zu: 100%
davon vor Ort: 100%
Java
Spring Boot
Kubernetes
Python
AWS
Docker
PostgreSQL
Agentic AI
LLM Finetuning
React
Kafka
RAG
Microservices
CI/CD
LLM Integration
Terraform
Elastic Search
Git
Go
German
Verhandlungssicher
English
Muttersprache
Vietnamese
Muttersprache

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland
möglich

Projekte

Projekte

5 Monate
2025-08 - heute

Designed and built scalable web applications supporting AI-driven phishing simulations

Software Engineer (Contract / Part-time) Java PostgreSQL React ...
Software Engineer (Contract / Part-time)
  • Designed and built scalable web applications supporting AI-driven phishing simulations, empowering organizations to train employees in cybersecurity awareness through real-time, deepfake, and generative AI scenarios. Supported nationwide rollouts for high-profile enterprise and government clients, training thousands of users in Security Awareness across Germany. Some of our clients include FC Bayern Munich, Lufthansa, and different government agencies.
  • Led the migration from a legacy simulation database to GitHub as the single source of truth, building robust automated sync/PR workflows, self-healing JGit workspaces, and advisory locking for consistent, reliable data management.
  • Integrated DataDog for comprehensive application performance monitoring and observability, significantly improving incident detection and response.
  • Developed no/low-code automations (Make flows) to synchronize and built different attack scenarios.
Java PostgreSQL React AWS DataDog
Revel8 ? AI Cybersecurity Awareness Platform
Berlin, Germany
7 Monate
2025-01 - 2025-07

Architected and delivered ASEN?s first AI-driven translation platform

Senior Software Engineer (Contractor) Python FastAPI React ...
Senior Software Engineer (Contractor)
  • Architected and delivered ASEN?s first AI-driven translation platform, transforming 20+ years of proprietary linguistic data into a scalable SaaS product.
  • Engineered a robust RAG (Retrieval-Augmented Generation) pipeline leveraging FAISS for semantic search across a vast collection of translation units and glossaries.
  • Automated translation memory, document conversion workflows, and glossary unification using cutting-edge LLM prompting strategies.
  • Seamlessly integrated multiple LLM providers (OpenAI, Anthropic, open-source models), adding fault-tolerant fallback logic for service reliability.
Python FastAPI React Docker FAISS LLM APIs
ASEN Translation GmbH
Berlin, Germany
1 Jahr
2024-01 - 2024-12

Built and shipped full-stack features

Software Engineer Java Spring Boot AWS ...
Software Engineer
  • Built and shipped full-stack features for CBRE?s Technical Due Diligence platform, enabling real estate consultants across EMEA to streamline property assessments and documentation workflows.
  • Designed scalable backend services with Java and Spring Boot, implementing document versioning, approval workflows, and PostgreSQL-backed audit trails for compliance requirements.
  • Architected asynchronous processing pipelines with RabbitMQ, reducing due diligence report generation time and improving system throughput for compute-intensive analyses.
  • Managed and optimized Kubernetes clusters on AWS, implementing auto-scaling policies and resource quotas that improved infrastructure cost efficiency.
  • Built Snowflake data pipelines and Grafana dashboards for business intelligence; provided third-level technical support for international enterprise clients.
Java Spring Boot AWS Kubernetes RabbitMQ Snowflake
CBRE Germany
Berlin, Germany
9 Monate
2023-04 - 2023-12

Developed backend functionalities

Software Engineer Java Spring Boot GCP ...
Software Engineer
  • Developed backend functionalities for the FX4Cash foreign exchange platform, a business-critical application for currency transactions
  • Implemented trading features with Java, Spring Boot, and Kafka on Google Cloud Platform
  • Built event-driven architectures with Kafka for real-time processing of trading data
  • Integrated with existing trading systems while ensuring compliance with financial regulations
  • Automated security and compliance checks in CI/CD pipeline; containerized microservices with Docker
Java Spring Boot GCP Kafka Kubernetes Terraform
Deutsche Bank
Berlin, Germany
2 Jahre 8 Monate
2020-11 - 2023-06

IT Infrastructure

IT Infrastructure (Contract / Part-time) Ruby on Rails Golang Airflow ...
IT Infrastructure (Contract / Part-time)
  • Owned and operated production infrastructure for Lufthansa?s innovation platforms, ensuring high availability for internal product teams.
  • Led a cross-functional team to architect and deliver data pipelines and backend systems powering internal Lufthansa innovation products.
  • Built and maintained backend services with Ruby on Rails and Golang, supporting rapid prototyping and product iterations.
  • Deployed end-to-end observability with Grafana and Prometheus; orchestrated ETL workflows with Apache Airflow for automated data processing.
Ruby on Rails Golang Airflow Prometheus Grafana
Lufthansa Innovation Hub
Berlin, Germany
4 Monate
2023-01 - 2023-04

Research Project

Golang Rust Kotlin ...
  • Designed and implemented HyMAS, a multi-agent job scheduling system for orchestrating distributed AI workloads across heterogeneous compute clusters.
  • Built high-performance agent communication layers in Golang and Rust, enabling low-latency task distribution and fault-tolerant coordination between distributed nodes.
  • Engineered resource-aware scheduling algorithms optimized for edge devices with constrained memory and CPU, improving workload placement efficiency.
  • Established CI/CD infrastructure with Jenkins and GitLab, automating build, test, and deployment pipelines for the research team.
Golang Rust Kotlin Elasticsearch Docker
Distributed AI Lab - TU Berlin
Berlin, Germany

Aus- und Weiterbildung

Aus- und Weiterbildung

5 Jahre 1 Monat
2018-10 - 2023-10

Technische Informatik

Bachelor of Science, Technical University Berlin
Bachelor of Science
Technical University Berlin

Kompetenzen

Kompetenzen

Top-Skills

Java Spring Boot Kubernetes Python AWS Docker PostgreSQL Agentic AI LLM Finetuning React Kafka RAG Microservices CI/CD LLM Integration Terraform Elastic Search Git Go

Produkte / Standards / Erfahrungen / Methoden

Profile

Software Engineer with 4+ years of experience building scalable enterprise and start-ups solutions at Revel8, Deutsche Bank, CBRE, and Lufthansa. Specialized in AI/LLM integration, RAG systems, cloud infrastructure, and backend architectures. Proven track record delivering production systems that process high-volume data while meeting strict compliance standards.


Core Competencies:

  • AI/LLM Integration (RAG, Embeddings, Fine-Tuning) 
  • Backend Development (Java, Python, Golang, Kotlin) 
  • Cloud & DevOps (AWS, GCP, Kubernetes, Docker, CI/CD) 
  • Full-Stack Development (React, PostgreSQL, Spring Boot, Prometheus, Grafana, DataDog)


Technical Skills

  • AI/ML: LLM Integration (OpenAI, Anthropic), RAG Systems, Embeddings, FAISS, LangChain, Fine-Tuning
  • Cloud & DevOps: AWS, GCP, Kubernetes, Docker, Terraform, Jenkins, GitLab CI/CD, GitHub Actions
  • Messaging: Kafka, RabbitMQ ? Monitoring: Grafana, Prometheus, DataDog

Programmiersprachen

Java
Python
Golang
Kotlin
Rust
TypeScript ? Spring Boot
FastAPI
React

Datenbanken

PostgreSQL
Elasticsearch
Snowflake
Redis
MongoDB

Einsatzorte

Einsatzorte

Berlin (+50km)
Deutschland
möglich

Projekte

Projekte

5 Monate
2025-08 - heute

Designed and built scalable web applications supporting AI-driven phishing simulations

Software Engineer (Contract / Part-time) Java PostgreSQL React ...
Software Engineer (Contract / Part-time)
  • Designed and built scalable web applications supporting AI-driven phishing simulations, empowering organizations to train employees in cybersecurity awareness through real-time, deepfake, and generative AI scenarios. Supported nationwide rollouts for high-profile enterprise and government clients, training thousands of users in Security Awareness across Germany. Some of our clients include FC Bayern Munich, Lufthansa, and different government agencies.
  • Led the migration from a legacy simulation database to GitHub as the single source of truth, building robust automated sync/PR workflows, self-healing JGit workspaces, and advisory locking for consistent, reliable data management.
  • Integrated DataDog for comprehensive application performance monitoring and observability, significantly improving incident detection and response.
  • Developed no/low-code automations (Make flows) to synchronize and built different attack scenarios.
Java PostgreSQL React AWS DataDog
Revel8 ? AI Cybersecurity Awareness Platform
Berlin, Germany
7 Monate
2025-01 - 2025-07

Architected and delivered ASEN?s first AI-driven translation platform

Senior Software Engineer (Contractor) Python FastAPI React ...
Senior Software Engineer (Contractor)
  • Architected and delivered ASEN?s first AI-driven translation platform, transforming 20+ years of proprietary linguistic data into a scalable SaaS product.
  • Engineered a robust RAG (Retrieval-Augmented Generation) pipeline leveraging FAISS for semantic search across a vast collection of translation units and glossaries.
  • Automated translation memory, document conversion workflows, and glossary unification using cutting-edge LLM prompting strategies.
  • Seamlessly integrated multiple LLM providers (OpenAI, Anthropic, open-source models), adding fault-tolerant fallback logic for service reliability.
Python FastAPI React Docker FAISS LLM APIs
ASEN Translation GmbH
Berlin, Germany
1 Jahr
2024-01 - 2024-12

Built and shipped full-stack features

Software Engineer Java Spring Boot AWS ...
Software Engineer
  • Built and shipped full-stack features for CBRE?s Technical Due Diligence platform, enabling real estate consultants across EMEA to streamline property assessments and documentation workflows.
  • Designed scalable backend services with Java and Spring Boot, implementing document versioning, approval workflows, and PostgreSQL-backed audit trails for compliance requirements.
  • Architected asynchronous processing pipelines with RabbitMQ, reducing due diligence report generation time and improving system throughput for compute-intensive analyses.
  • Managed and optimized Kubernetes clusters on AWS, implementing auto-scaling policies and resource quotas that improved infrastructure cost efficiency.
  • Built Snowflake data pipelines and Grafana dashboards for business intelligence; provided third-level technical support for international enterprise clients.
Java Spring Boot AWS Kubernetes RabbitMQ Snowflake
CBRE Germany
Berlin, Germany
9 Monate
2023-04 - 2023-12

Developed backend functionalities

Software Engineer Java Spring Boot GCP ...
Software Engineer
  • Developed backend functionalities for the FX4Cash foreign exchange platform, a business-critical application for currency transactions
  • Implemented trading features with Java, Spring Boot, and Kafka on Google Cloud Platform
  • Built event-driven architectures with Kafka for real-time processing of trading data
  • Integrated with existing trading systems while ensuring compliance with financial regulations
  • Automated security and compliance checks in CI/CD pipeline; containerized microservices with Docker
Java Spring Boot GCP Kafka Kubernetes Terraform
Deutsche Bank
Berlin, Germany
2 Jahre 8 Monate
2020-11 - 2023-06

IT Infrastructure

IT Infrastructure (Contract / Part-time) Ruby on Rails Golang Airflow ...
IT Infrastructure (Contract / Part-time)
  • Owned and operated production infrastructure for Lufthansa?s innovation platforms, ensuring high availability for internal product teams.
  • Led a cross-functional team to architect and deliver data pipelines and backend systems powering internal Lufthansa innovation products.
  • Built and maintained backend services with Ruby on Rails and Golang, supporting rapid prototyping and product iterations.
  • Deployed end-to-end observability with Grafana and Prometheus; orchestrated ETL workflows with Apache Airflow for automated data processing.
Ruby on Rails Golang Airflow Prometheus Grafana
Lufthansa Innovation Hub
Berlin, Germany
4 Monate
2023-01 - 2023-04

Research Project

Golang Rust Kotlin ...
  • Designed and implemented HyMAS, a multi-agent job scheduling system for orchestrating distributed AI workloads across heterogeneous compute clusters.
  • Built high-performance agent communication layers in Golang and Rust, enabling low-latency task distribution and fault-tolerant coordination between distributed nodes.
  • Engineered resource-aware scheduling algorithms optimized for edge devices with constrained memory and CPU, improving workload placement efficiency.
  • Established CI/CD infrastructure with Jenkins and GitLab, automating build, test, and deployment pipelines for the research team.
Golang Rust Kotlin Elasticsearch Docker
Distributed AI Lab - TU Berlin
Berlin, Germany

Aus- und Weiterbildung

Aus- und Weiterbildung

5 Jahre 1 Monat
2018-10 - 2023-10

Technische Informatik

Bachelor of Science, Technical University Berlin
Bachelor of Science
Technical University Berlin

Kompetenzen

Kompetenzen

Top-Skills

Java Spring Boot Kubernetes Python AWS Docker PostgreSQL Agentic AI LLM Finetuning React Kafka RAG Microservices CI/CD LLM Integration Terraform Elastic Search Git Go

Produkte / Standards / Erfahrungen / Methoden

Profile

Software Engineer with 4+ years of experience building scalable enterprise and start-ups solutions at Revel8, Deutsche Bank, CBRE, and Lufthansa. Specialized in AI/LLM integration, RAG systems, cloud infrastructure, and backend architectures. Proven track record delivering production systems that process high-volume data while meeting strict compliance standards.


Core Competencies:

  • AI/LLM Integration (RAG, Embeddings, Fine-Tuning) 
  • Backend Development (Java, Python, Golang, Kotlin) 
  • Cloud & DevOps (AWS, GCP, Kubernetes, Docker, CI/CD) 
  • Full-Stack Development (React, PostgreSQL, Spring Boot, Prometheus, Grafana, DataDog)


Technical Skills

  • AI/ML: LLM Integration (OpenAI, Anthropic), RAG Systems, Embeddings, FAISS, LangChain, Fine-Tuning
  • Cloud & DevOps: AWS, GCP, Kubernetes, Docker, Terraform, Jenkins, GitLab CI/CD, GitHub Actions
  • Messaging: Kafka, RabbitMQ ? Monitoring: Grafana, Prometheus, DataDog

Programmiersprachen

Java
Python
Golang
Kotlin
Rust
TypeScript ? Spring Boot
FastAPI
React

Datenbanken

PostgreSQL
Elasticsearch
Snowflake
Redis
MongoDB

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.