Full Stack AI Engineer (all) - React / NodeJS at XO Life GmbH

Who we are looking for

We are seeking a versatile Full Stack AI Engineer to join our engineering team to build end-to-end solutions that power our digital health platform and help the platform to grow. This role involves designing and implementing both client-side and server-side applications, creating seamless user experiences while ensuring robust backend infrastructure.

Your mission

Development

• Build responsive and intuitive mobile first user interfaces using React and React Native
• Implement modern UI/UX designs with attention to accessibility and performance
• Integrate frontend applications with backend APIs and services 
• Design and implement scalable backend architectures
• Optimize application performance and implement efficient state management
• Develop cross-platform mobile applications using Expo and React Native
• Build data processing pipelines and background jobs

Engineering Tools

• AI-assisted development: Ability to effectively use AI tools in daily development work

Database & Data Management

• Design and optimize database schemas (MongoDB, Redis)
• Implement data migration strategies and ensure data integrity
• Monitor and optimize database performance

System Architecture & Integration

• Design full-stack architectures that scale from web to mobile
• Integrate third-party APIs and services
• Implement real-time features using WebSockets

Infrastructure & Deployment

• Deploy and manage applications in cloud environments (AWS, GCP)
• Implement containerization with Docker and Kubernetes
• Monitor system performance and troubleshoot issues across the stack
• Ensure security best practices and compliance
• Build and maintain CI/CD pipelines

Collaboration & Quality

• Be fully responsible for the quality of the produced outcome
• Work closely with product managers, designers, and other engineers
• Participate in code reviews and maintain code quality standards
• Write comprehensive technical documentation

Your background

Education & Experience

• Bachelor's degree in Computer Science, Software Engineering, or related field OR equivalent work experience with strong technical portfolio
• 7+ years of full-stack product development experience
• Experience with growth techniques
• Experience with testing frameworks (unit, integration, end-to-end)
• Experience with performance optimization and monitoring tools
• Experience with mobile-first development and responsive design

Frontend Technical Skills

• JavaScript/TypeScript: Expert-level proficiency in modern JavaScript (ES6+)
• React: Strong experience with React, hooks, context API, and state management
• CSS/Styling: Proficiency in modern CSS, styled-components, or similar
• Build Tools: Webpack, Vite, or similar bundling tools
• Expo: Familiarity with Expo framework and development workflow
• React Native: Experience building cross-platform mobile applications

Backend Technical Skills

• Node.js: Strong server-side JavaScript/TypeScript development
• Express.js: Experience building RESTful APIs and web services
• Databases: MongoDB (primary), Redis for caching
• API Development: RESTful APIs
• Authentication: JWT, OAuth, session management

Soft Skills

• Strong problem-solving and analytical abilities
• Good communication and teamwork abilities
• Eagerness and passion to work in agile and lean development environments
• Deep product and customer-centric — always advocate for user needs and deliver delightful, impactful experiences

Preferred Qualifications

• Experience with healthcare or regulated industry applications
• Understanding of accessibility standards
• Familiarity with design systems and component libraries
• Experience with mobile-specific features (push notifications, offline storage)
• Knowledge of mobile performance optimization

Please note that you must have the legal right to live and work in the European Union (EU). Applications from candidates residing outside the EU cannot be considered.

Why us?

• Top Tech company in Digital Health: A dynamic, high-growth environment where everyone in the team depends on each other's performance. You can see your impact. We learn and develop quickly.
• True impact in healthcare: What we are building with our brite platform is unique worldwide, ambitious, and could have a huge impact on billions of people who are ill or interested in health.
• International team: We are 14 nationalities working across Europe. We bring different mentalities and cultures with us, but we are all aligned towards our grand vision. 
• 100% remote with best IT equipment: We work 100% remotely, meet regularly for special team events and team offsite weeks, for example in Tuscany, the Alps, or Mallorca. You will receive a Mac computer so that you are already technically up to speed. 

Hiring Process

• Initial Screening: Technical phone/video introductory and experience call
• Leadership Interview: Discussion focused on leadership principles, values, and cultural fit.
• Technical Deep Dive: Live coding session covering React, Node.js, and database design