Backend Developer (all genders)

21X; Frankfurt; Hybrid; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

A financial technology company in Frankfurt is seeking a backend developer experienced in Java and Spring Boot to design and implement microservices. You'll work in a flexible environment, with opportunities for growth and contributing to infrastructure tasks. The ideal candidate has knowledge of Kubernetes and AWS. Remote work is acceptable for 2-3 days per week.

Leistungen

Impact in the finance sector

Opportunities for training and advancement

Flexible working hours

Qualifikationen

• Proven experience in backend development, ideally with Java and Spring Boot.
• Solid understanding of microservice architecture, RESTful APIs, and distributed systems.
• Experience with containerization and orchestration, especially Kubernetes and Docker.

Aufgaben

• Design and implement scalable microservices using Java and Spring Boot.
• Support the development of our Simulation and Validation framework.
• Collaborate with cross-functional teams to refine technical and business requirements.
• Develop and maintain technical documentation, including architecture diagrams.

Kenntnisse

Backend development experience

Java and Spring Boot

Microservice architecture

RESTful APIs

Kubernetes

Docker

AWS

PostgreSQL or MySQL

CI/CD pipelines

Jobbeschreibung

Overview

• We are only accepting applications from candidates that currently hold a work permit for Germany or Austria.
• On-site in Lindau am Bodensee for 2-3 days minimum. 2-3 days homeoffice is fine.
• Full- or part-time possible

A current CV is sufficient. We look forward to receiving your applicatio

Your profile

• Proven experience in backend development, ideally with Java and Spring Boot.
• Solid understanding of microservice architecture, RESTful APIs, and distributed systems.
• Experience with containerization and orchestration, especially Kubernetes (K8s) and Docker.
• Familiarity with cloud platforms, preferably AWS (e.g., ECS/EKS, S3, RDS, IAM).
• Good knowledge of relational databases (e.g., PostgreSQL, MySQL) and/or NoSQL solutions.
• Understanding of CI/CD pipelines and build tools (e.g., Jenkins, GitHub Actions, GitLab CI).

Why us?

• Impact: At 21X you can make a difference. Take your chance to help shape the world of finance with your skills
• Growth:You have the opportunity to be part of a rapidly growing company with great opportunities for further training and advancement
• Appreciation: We welcome your experience and skills – 21X is always open to your suggestions and ideas
• Responsibility: Take responsibility and set your own goals to be able to use your full potential
• Flexibility: Whether Early Bird or Night Owl - find your ideal working rhythm

Tasks

• Design and implement scalable microservices using Java and Spring Boot, deployed in a Kubernetes (K8s) environment on AWS.
• Supporting the development of our Simulation and Validation framework (Java and Python)
• Collaborate with cross-functional teams (e.g., product, frontend, QA) to analyze, clarify, and refine technical and business requirements.
• Develop and maintain technical documentation, including architecture diagrams, API specifications, and system workflows.
• Contribute to infrastructure and DevOps tasks based on your experience and interests, such as database design, CI/CD pipelines, monitoring, security hardening, and test automation.
• Write clean, maintainable, and efficient code, following best practices for software engineering and code reviews.
• Continuously improve system performance, reliability, and scalability through profiling, refactoring, and modern backend practices.