Principal Engineer

Join our team as a Principal Engineer and help us transform every company into a sustainable business. You will be the most senior individual contributor on our engineering team, partnering with our Head of Engineering to define and drive impactful technical initiatives. Your work will directly reduce carbon emissions at scale and contribute to a sustainable world. Enjoy benefits such as 27 days of vacation, flexible working hours, a learning budget, and the ability to work from anywhere.

• Assurer la qualité de la base de code et collaborer avec le responsable de l'ingénierie pour garantir une architecture adaptée à la plateforme.
• Diriger les initiatives techniques les plus impactantes de l'entreprise, en élevant les normes de fiabilité et de performance.
• Participer à la conception et à l'évolution de l'architecture technique de la plateforme de données, en veillant à sa fiabilité et à son évolutivité.
• Think in end-to-end systems - you can trace a data quality issue from a customer-facing report back through the analytics layer, processing pipeline, queue, and ingestion point
• Have 10+ years in software engineering, with demonstrated experience leading technical direction across a team, whether in a formal Staff/Principal title or equivalent scope
• Are fluent in TypeScript/Node.js and comfortable with AWS (ECS, Lambda, SQS, Aurora)
• Care about observability as a discipline - SLOs, dashboards, runbooks, post-mortems that become preventive guardrails
• Have a DevOps mindset - you own what you build, from technical design to deployment, monitoring, and operational health
• Have a hands-on experience with queue-based architectures (SQS FIFO, Kafka) at scale
• Have led technical direction across a team of 5-15 engineers without being the manager - through RFCs, prototypes, and earning trust
• Have shipped a major system rewrite or migration incrementally - feature flags, phased rollouts - in a system where correctness matters as much as uptime
• Communicate clearly in writing - tradeoff framing that other engineers actually read and reference
• Familiarity with analytics layers (Cube.js, Snowflake, CDC pipelines)
• Climate tech, carbon accounting, or compliance-grade data systems
• Series A/B startup experience