Sales & Business Development Jobs at Cosine
Cosine has one open sales and business development role, in London, alongside 2 other open roles.
About Cosine
Cosine trains AI models and specialised coding agents for organisations that need frontier capability within secure environments. The company develops Lumen, an AI model focused on writing code, and offers solutions for sovereign AI, air-gapped environments, cybersecurity, and niche languages.
The open role
- Founding Head of Public Sector: London, Head, posted 16 July 2026.
Also hiring at Cosine
Cosine is also hiring in engineering (1) and finance and legal (1).
Its roles are in London, UK (3).
What sales and business development work involves at an early-stage startup
You are often the first person selling, so there is no playbook and no inbound list. You find the buyers, run the pitch, then write down what worked so the next hire can repeat it. At a large company the territory and the price list already exist.
Experience level
Open roles by the experience the posting asks for.
Questions people ask
Where is the sales and business development job at Cosine?
London.
What else is Cosine hiring for?
Engineering and finance and legal: 2 more roles.