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

Jack & Jill/External ATS; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

A leading AI technology firm is seeking a Senior Developer Evangelist in London. This hybrid position requires deep understanding of machine learning and exceptional communication skills to create high-quality content and technical narratives. The ideal candidate will produce written explainers and videos showcasing the platform's value, influencing enterprise understanding of AI. This role offers a salary of £60k–£90k plus equity, with opportunities to work with advanced engineering teams.

Qualifications

• Fluent in modern ML concepts including fine-tuning strategies and agentic system architectures.
• Demonstrated ability to produce video content, including storyboarding and editing.
• Ability to independently research and produce exceptional technical content.

Responsibilities

• Produce long-form written explainers on ML training techniques and product innovations.
• Create high-quality video content demonstrating the platform.
• Develop customer case studies highlighting real-world deployments.

Skills

Fluent in modern ML concepts

YouTube-quality video content production

Clarity and narrative structure obsession

Job description

This is a job that we are recruiting for on behalf of one of our customers.

To apply, speak to Jack. He's an AI agent that sends you unmissable jobs and then helps you ace the interview. He'll make sure you are considered for this role, and help you find others if you ask.

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.

How to Apply:

To apply for this job speak to Jack, our AI recruiter.

Step 1. Visit our website
Step 2. Click ‘Speak with Jack’
Step 3. Log in with your LinkedIn profile
Step 4. Talk to Jack for 20 minutes so he can understand your experience and ambitions
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