Senior Full Stack Developer

The position

• We're looking for a fullstack software engineer, with an interest towards DevOps, as we get increasingly growing needs in this aspect.

• You'll take full ownership across the full cycle, from prototype to production. Since we have no dedicated ops team, running your own services in production is part of the job. No on-call, though.

• You'll join a team of two people (Sylvain & Tim) in close collaboration with the CTO (Aaron).

What you bring

• Professional fluency in English (C1/C2);

• Senior-level mindset & experience developing back-end solutions in critical production environments;

• Advanced programming skills in Python 3.12+;

• Genuine experience with GCP or equivalent (AWS, Azure); or you're willing to learn and/or improve;

• Knowledge of IoT, or a strong will to learn it;

• Analytical and critical thinking; ability to take responsibility and ensure quality from prototype to production; ability to say no;

• Fluency with AI-assisted coding tools (Claude Code and similar), including the ability to critically evaluate AI-generated code and continuously improve internal procedures;

• Comfort with a die & retry philosophy: you try often, fail fast, and learn quickly (fail fast in dev, rigor in production);

• You stay ahead of the curve in software engineering and security, with a genuine interest in producing battle-tested, production-grade code;

• Entrepreneurial mindset: you find solutions, take initiative, and want to directly shape Thermosphr's product and direction (because you will).

Bonus points

• Familiarity with IoT, MQTT and/or building automation (HVAC);

• Networking knowledge: routers, VLANs;

• Ability to challenge existing architectures, including ones that have worked for years;

• (True) fullstack development experience (any framework, any language, ability to maintain a production fleet);

• Infrastructure as code with Terraform.

• You're curious. You're willing to learn. I've already said that. But we're all lifelong learners, after all.

Even if you don't tick all the boxes, we encourage you to apply!