Full Stack Engineer (all genders)

Deutsche Lufthansa AG; Köln; On-site; EUR 90,000 - 130,000; Full time

Job summary

Deutsche Lufthansa AG is seeking an experienced software engineer to integrate optimization engines and Generative AI into enterprise applications. You will design end-to-end features across backend and frontend, build scalable microservices with Java/Spring Boot, and develop frontend apps using Vue.js.

Collaboration with Product, Design, and Engineering teams, plus a strong focus on performance and reliability, is essential.

Qualifications

• 5+ years of software engineering experience.
• Strong expertise in Java and Spring / Spring Boot.
• Experience building microservices and REST APIs at scale.
• Frontend experience with React or Vue; JavaScript/TypeScript, HTML, CSS.
• Cloud platforms (Azure, AWS, or GCP); containerization with Docker and Kubernetes; CI/CD collaboration.
• Strong testing knowledge and strategies.

Responsibilities

• Integrate optimization engines and Generative AI into production apps.
• Design and implement end-to-end features across backend and frontend.
• Build scalable microservices and REST APIs using Java/Spring Boot.
• Develop frontend apps with Vue.js; ensure code quality via testing and reviews.
• Collaborate with Product, Design, and Engineering teams; guide performance improvements.

Skills

Java

Spring Boot

Frontend (Vue/React)

REST APIs

JavaScript/TypeScript

HTML/CSS

Cloud platforms

Kubernetes

CI/CD

Testing strategies

Tools

Docker

Kubernetes

CI/CD tooling

Job description

What you'll do

• Integrating mathematical optimization engines and Generative AI capabilities into production-grade enterprise applications (key part of this role)
• Design and implement end-to-end features across backend and frontend
• Build and evolve scalable microservices and APIs using Java (Spring Boot)
• Develop high-quality frontend applications using Vue.js
• Ensure high code quality through testing, code reviews, and engineering best practices
• Collaborate closely with Product, Design, and Engineering teams
• Optimize systems for performance, scalability, and reliability
• Support and mentor other engineers through technical guidance and feedback.

Ihr Profil:

What you will need

• 5+ years of experience in software engineering
• Strong expertise in Java and Spring / Spring Boot
• Experience building microservices and REST APIs at scale
• Solid frontend experience with React or Vue. Strong knowledge of JavaScript / TypeScript, HTML, CSS
• Platform & Engineering Practices: Experience with cloud platforms (Azure, AWS, or GCP); Strong understanding of containerization (Docker) and Kubernetes; Experience with CI/CD and DevOps collaboration
• Strong knowledge of testing strategies

Nice to have

• Exposure to or experience with Operations Research (OR) concepts and ecosystems: MILP/LP modeling, constraint programming, scheduling, routing, forecasting
• Experience with agent frameworks and protocols (e.g., LangGraph, Pydantic AI, Model Context Protocol / MCP)