(Senior) Full-stack Developer (Next.js / Node.js)

Your mission is to develop and maintain a reliable API and an elegant, high-performance web frontend for 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) - serving the full lifecycle of satellite operators. You build the interface through which commercial constellation operators and space agencies access and control OKAPI:Orbits services., * Design, develop, and maintain scalable web frontends using Next.js and Node.js-based APIs

• Implement and optimize user-friendly, high-performance, and secure web applications for satellite operators and space agencies
• Design and maintain interfaces between frontend, API, and microservices, including authentication, authorization, and data flow management
• Collaborate closely with scientists and engineers to translate complex domain requirements into user-centric software solutions
• Take ownership of frontend architecture, performance, usability, and maintainability
• Plan and document implementation steps, from technical design to production deployment
• Ensure code quality, automated testing, and adherence to security and development standards
• Contribute to the improvement of CI/CD pipelines, monitoring, and automation to support reliable and continuous delivery
• Analyze and resolve complex issues across frontend, API, and data layers with a focus on reliability and user experience
• Work in small, interdisciplinary teams, bringing your full-stack expertise into cross-functional projects, * Flat hierarchy, small teams, flexible hours
• Onboarding in Braunschweig, afterwards on-site in Brunswick, or hybrid in Brunswick or Munich
• Early ownership, influence technical direction
• Training budget for continuous development
• Corporate benefits like BahnCard 25/50, bike leasing, German classes via Lingoda
• Join space events and conferences, advocate for sustainable space
• Free office drinks, monthly company lunch, regular after-work activities

Do you have experience in TypeScript?, * Degree in Computer Science, Software Engineering, or a related field, or formal IT specialist training

• Several years of hands-on experience building production-grade applications with React.js, Node.js, and TypeScript
• Deep understanding of JavaScript fundamentals, asynchronous programming, and modern ECMAScript features
• Strong MongoDB expertise: schema design, data modeling, indexing, aggregation, and performance optimization in high-load systems
• Experience with RESTful API design and integration, including authentication, authorization, and versioning
• Familiarity with Git-based workflows, pull requests, and collaborative code reviews
• Proven ability to debug complex issues across frontend, backend, and data layers
• Focus on clean, maintainable code, testing, and long-term software reliability
• Proactive communication and team-oriented mindset, comfortable working in distributed setups
• Good English, written and spoken

Nice-to-haves

• Experience with Next.js 15+, including React Server Components, SSR, or ISR for performance-optimized frontends
• Experience with Docker and Kubernetes for local development, deployment, and scaling of services
• Familiarity with microservice architectures and message-based communication (e.g., RabbitMQ)
• Experience with Python or Java, particularly for backend or data-processing pipelines
• Knowledge of CI/CD tools (GitLab CI) and frontend testing frameworks (Cypress, Vitest, Jest)
• Experience with monitoring and observability (DataDog, Sentry, OpenTelemetry)
• Exposure to 3D visualisation frameworks such as CesiumJS or WebGL libraries
• Interest or experience in the space or aerospace domain
• Experience in mentoring or technical leadership within agile teams

OKAPI:Orbits is at the forefront of space sustainability, addressing some of the most pressing challenges of the space industry: the growing problem of crowded orbital regimes, and the need for more efficient satellite operations. We're providing end-to-end solutions that help various space industry players cover their Space Situation Awareness (SSA), and Space Traffic Management and Coordination (STM & STC) needs. We are committed to safeguarding space missions and access to space for all humanity. Join us on our mission.     If you require alternative methods of application or screening, you must approach the employer directly to request this as Indeed is not responsible for the employer's application process.