Backend Developer (Java & Python, Microservices)

OKAPI:Orbits GmbH; Braunschweig; Vor Ort; EUR 70.000 - 100.000; Vollzeit

Benefits dieser Stelle

Flat hierarchy

Flexible hours

Vacation days

Training budget

Career path

Corporate benefits

German language course

Bahncard

Bike leasing

Company pension

Wellness subsidy

Space events

Zusammenfassung

OKAPI:Orbits is seeking a backend engineer to design and maintain scalable, asynchronous microservices in Python for external projects and Java Spring Boot for our products. You will implement robust data pipelines, distributed messaging with RabbitMQ, and collaborate with space engineers to translate mission requirements into reliable software.

You will contribute to cloud-native deployments, CI/CD, and observability while maintaining security and performance.

Qualifikationen

• Degree in Computer Science, Software Engineering, or related field.
• At least 2 years of Python backend development experience.
• At least 2 years of backend development with Java (Spring Boot).
• Solid understanding of microservice architectures and distributed systems.
• Experience with testing and code quality assurance.
• Experience with message-based communication (RabbitMQ) and Docker.
• Ability to plan and implement complex features with engineers and scientists.
• Proficient English communication.

Aufgaben

• Design, develop, and maintain asynchronous microservice backends in Python and Java Spring Boot for products and external projects.
• Build data processing and distribution pipelines for orbital, telemetry, and mission data.
• Design and maintain message-based communication between microservices (RabbitMQ) and containers (Docker).
• Collaborate with space engineers and scientists to translate requirements into scalable software.
• Share responsibility for backend architecture across tech stacks with focus on performance and reliability.
• Plan and document implementation steps from architecture to cloud deployment.
• Ensure code quality, automated testing, and security standards.
• Advance CI/CD, observability, and automation for stable releases.
• Resolve complex distributed system issues efficiently.

Kenntnisse

Python backend

Java Spring Boot

Microservice architectures

Asynchronous systems

Message-based wiring

Testing & QA

English communication

Ausbildung

CS/Software Engineering degree

Fachinformatiker (IT specialist)

Tools

RabbitMQ

Docker

Kubernetes

Jobbeschreibung

Your mission

Your mission is to design and maintain a scalable, asynchronous backend that powers OKAPI:Orbits' end-to-end solutions across mission design, Space Situational Awareness (SSA), Space Traffic Management (STM), Flight Dynamics (FD), and Space Traffic Coordination (STC), supporting satellite operators throughout their entire mission lifecycle.

You’ll work primarily on external customer projects with a Python-based tech stack, while also contributing in parallel to our products built on Java Spring Boot. You design and implement robust microservices that process and distribute large volumes of orbital and telemetry data to deliver reliable APIs and automation processes. You already bring solid experience and take independent ownership of parts of the backend architecture across both environments.

You’ll work on the systems that enable satellite operators and space agencies to analyze, coordinate, and protect their missions in an increasingly crowded space environment.

Studies show that women are less likely to apply for a position if they don’t meet 100% of the requirements. Please know that we explicitly encourage you to apply if this applies to you, as long as you bring a passion for space technology, reliable software development, and sustainable use of space.

OKAPI:Orbits already brings together a highly diverse team and is actively committed to growing that diversity further, since studies show that heterogeneous teams achieve better results and drive innovation.

Your tasks and responsibilities

• Design, develop, and maintain asynchronous, microservice-based backend systems, primarily in Python for external customer projects and in parallel in Java Spring Boot for our products


• Implement and optimize data processing and distribution pipelines that handle large volumes of orbital, telemetry, and mission data


• Design and maintain message-based communication structures between microservices (e.g., via RabbitMQ or comparable message brokers)


• Collaborate closely with space engineers and scientists to translate mission-related requirements into scalable, robust software solutions


• Share responsibility for the backend architecture across both tech stacks, with a focus on performance, fault tolerance, and maintainability


• Plan and document implementation steps, from system architecture through deployment in a cloud-native environment


• Ensure code quality, automated testing, and adherence to security and development standards


• Advance CI/CD pipelines, observability, and automation to support stable, continuous releases


• Analyze and resolve complex issues in distributed systems with a focus on efficiency and reliability


• Work within small, interdisciplinary teams, contributing your backend expertise to cross-functional projects

Your profile

Must-haves

• Degree in Computer Science, Software Engineering, or a related field, or completed vocational training as a Fachinformatiker (IT specialist)


• At least 2 years of professional experience with Python for backend development, scripting, automation, or data processing


• At least 2 years of professional experience in backend software development with Java (Spring Boot or comparable)


• Solid understanding of microservice architectures, asynchronous systems, and distributed communication patterns


• Practical experience with testing and code quality assurance


• Experience with, or willingness to quickly get up to speed on, message-based communication between services (e.g., RabbitMQ or comparable message brokers) and containerization (Docker)


• Ability to independently plan, implement, and review complex features in close collaboration with engineers and scientists


• Proactive communication, structured way of working, and good written and spoken English

Nice-to-haves

• Experience with orchestration, particularly Kubernetes


• Experience with code reviews and adherence to coding standards
• Solid understanding of software architecture principles, including modular structure, scalability, and maintainability


• Experience with secure software development


• Background in or interest in the space or aerospace sector

Why us?

• Flat hierarchy, small teams, flexible working hours


• Up to 30 days’ vacation& up to 30 days’ workation per year


• Early responsibility, influence on the technical direction


• Training budget for your personal development


• Career paths to support and promote your long-term development


• Corporate benefits (brand discounts, travel discounts, concert tickets, etc.)


• Free German language course


• Bahncard (25 within Braunschweig, 50 outside)


• Bike leasing


• Company pension scheme


• Subsidy towards Hansefit / Wellpass membership


• Participation in space events and conferences to promote sustainable space travel

From Application to Offer: Our Hiring Process

• You send us your application


• We review your profile and get back to you with a short questionnaire


• A first interview with our HR team


• A short coding challenge


• A second interview with a member of the team you would join


• A final interview with the department lead