Backend Developer (all genders) bei 21x in Frankfurt, Remote, Lindau

Arbeitsbeschreibung - Backend Developer (all genders)

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

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.

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

About us

21X is a Frankfurt-based fintech at the forefront of revolutionizing capital markets through the use of blockchain technology for the trading and settlement of digital securities.

In December 2024 we secured our license to launch and operate a ground-breaking DLT trading and settlement system (DLT TSS) trading venue, a milestone that positions the company as a leader in the transition to digital finance.

21X is ideally positioned to enable smart contract-based issuance, trading and settlement of tokenized stocks, bonds and funds, offering unparalleled transparency, efficiency and security.

The 21X exchange is set to launch in the spring of 2025, bringing the future of capital markets to life.

We are a highly motivated global team of experts with a deep knowledge of capital markets, digital assets and public blockchains.

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Backend Developer (all genders)