Lead Backend Engineer
OpalParis, Ile-de-France, France • Normandy, France •
Posted October 3, 2025
Full Time
About the Company
Opal is The Focus Company™️ dedicated to empowering humans to enhance their daily focus. With a mission centered on leveraging technology for human progress, productivity, and happiness, Opal aims to provide innovative solutions that improve concentration and well-being.
Job Description
Opal is seeking a Lead Backend Engineer to own the design and implementation of their backend infrastructure as they scale from 1 million to 10 million+ daily active users. This role involves building scalable APIs, designing data models, ensuring operational excellence, and collaborating with cross-functional teams. The ideal candidate will be strong in Javascript/TypeScript, cloud platforms, and API design.
Requirements
- Proven experience designing and scaling backend infrastructure for millions of users.
- Hands-on experience building cost-efficient, secure, and reliable systems.
- Strong JavaScript/TypeScript expertise.
- Experience with cloud platforms (preferably GCP) and building scalable services.
- Proficiency in SQL & NoSQL databases and designing scalable data models.
- Experience with CI/CD pipelines & IaC.
Benefits
- Mission-Driven Impact
- Collaboration
- Meaningful challenges
- Well-Supported
- Competitive Compensation
- Growth Potential
