Frontend Developer building intuitive and seamless cross - platform sports betting applications at iGaming startup. Focusing on coding, debugging, and enhancing user experience in Lisbon.
About the role
- Senior Front-End Engineer designing and building intelligent user experiences for AI workflows at Sirona Medical. Collaborating with cross-functional teams to improve clinical outcomes through technology.
Responsibilities
- Design and implement modern, scalable front-end systems in React, TypeScript, and GraphQL
- Build SDKs and reusable component libraries that bridge AI systems and product surfaces
- Prototype intelligent, data-rich workflows that blend human interaction with AI assistance
- Work across the stack to connect frontend features to Python/FastAPI backends and APIs
- Collaborate with AI and backend teams to design clean interfaces between systems
- Create UI patterns that visualize AI reasoning, feedback, and real-time collaboration
- Shape engineering best practices for modularity, observability, and performance
- Mentor other engineers and influence technical direction across Sirona’s product stack
Requirements
- 8+ years of professional software engineering experience, with deep front-end expertise and full-stack fluency
- Expertise in React, TypeScript, and GraphQL, with a strong grasp of front-end architecture, state management, and performance optimization
- Experience building and maintaining internal SDKs, reusable component libraries, or system abstractions that connect front-end and backend or AI services
- Fluency with API design and integration, including REST and GraphQL APIs, and working knowledge of backend frameworks such as Python/FastAPI
- Proven experience building or integrating AI-powered product experiences — whether through traditional ML models or newer technologies such as LLMs and agentic workflows
- Experience designing interfaces that make AI outputs actionable, explainable, and trustworthy
- Strong product intuition and UX sensitivity. You build tools that feel elegant, fast, and obvious to users
- Experience working in cross-functional environments with designers, backend engineers, and AI researchers
- Comfortable moving between prototype and production. You can experiment quickly but know how to ship reliable, maintainable code
- Excellent written and verbal communication skills. You can clearly articulate technical and product tradeoffs.
Benefits
- Stock options
- Medical, dental, and vision insurance
- Flexible time off
- Maternity and paternity leave
- 401(k) with matching
- MacBook Pro
- Support for conferences and continuing education
- Opportunity to work on cutting-edge AI in a mission-driven, high-impact domain
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