Senior Developer Evangelist (£60k-£90k + Equity) at Cosine.sh

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Senior Developer Evangelist

Salary: £60k–£90k + Equity

Company Description: Cosine.sh — Autonomous AI coding agent for enterprises

Job Description:
Cosine.sh is seeking a Senior Developer Evangelist to lead its technical storytelling. This hybrid role blends deep ML expertise with world-class communication skills, enabling you to explain complex systems with clarity. You’ll craft best-in-class content, define the technical narrative, produce customer case studies, and elevate Cosine’s brand—shaping how enterprises understand their agentic AI coding platform.

Location: London, UK

Why this role is remarkable:

• Work with advanced engineering teams at global investment banks and defence organisations deploying a unique air-gapped, on-premise AI coding agent.

• Join an in-house ML research lab that achieved a world-leading 72% on OpenAI's SWE-Lancer benchmark through advanced post-training work.

• Influence how enterprises, developers, and policymakers understand an agentic, full-stack AI engineering system—owning Cosine’s technical narrative from day one.

What you will do:

• Produce long-form written explainers on Cosine’s ML training techniques, agent architectures, and product innovations.

• Create high-quality, YouTube-ready video content demonstrating the platform and articulating its enterprise value.

• Develop technically rigorous customer case studies highlighting real-world deployments, evaluation outcomes, and post-deployment insights.

The ideal candidate:

• Fluent in modern ML concepts including fine-tuning strategies, eval pipelines, and agentic system architectures.

• Demonstrated ability to produce YouTube-quality video content (storyboarding, filming, editing, motion graphics).

• Obsessed with clarity and narrative structure, able to independently research technical topics and produce exceptional content.

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