Marketing & Communications Lead

HASH; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

HASH is building an open-source platform for structured knowledge and organizational decision‑making. We are hiring a Marketing & Communications Lead to turn substance into a coherent system that reaches the right people and gives them useful reasons to stay engaged.

You will own content, lifecycle email, newsletters, social channels, SEO, website marketing copy and marketing operations. You’ll decide what to communicate, to whom, in what form and why, writing and editing much of the work

Qualifications

• Exceptional writing and editing that makes complex ideas clear and compelling.
• Hands-on ownership of lifecycle email, newsletters, social distribution, SEO, and marketing operations.
• Ability to build automated journeys, segments and measurement without a dedicated operations team.
• Strong editorial judgment and ability to distinguish attention-grabbing content from calendar-fillers.
• Commercial awareness with natural avoidance of overly promotional tone.
• Ability to learn technical subjects and explain them accurately.
• Thoughtful use of AI and automation for leverage while ensuring factual accuracy.
• High agency and capacity to sustain a demanding cadence without sacrificing quality.

Responsibilities

• Develop a clear positioning and message system for technical, operational and executive audiences.
• Own onboarding, activation, education, re-engagement after sign-up and commercial conversations.
• Plan, write and operate newsletters for relevant audience segments.
• Build a distinctive social presence and adapt ideas across formats.
• Own the blog calendar and write/commission/edit explainers, POVs, customer stories and product announcements.
• Interview researchers, engineers, customers and partners to create accurate material.
• Research search demand and competitive results; create high-quality SEO briefs and content clusters.
• Improve website and landing copy, CTAs and conversion paths.
• Build and maintain marketing automation, segmentation, lead scoring, instrumentation and reporting.
• Create sales-enablement material and keep it current.
• Brief and prioritize the Senior Brand Designer’s work across posts, emails, campaigns, decks, reports and case studies.
• Measure activation, audience growth, organic discovery, inbound demand and sales influence, and adapt program accordingly.

Skills

Content marketing

Email marketing

SEO

Social media

Marketing operations

Editing/writing

Job description

HASH is building an open-source platform for structured knowledge and organizational decision‑making. We turn information from databases, applications, documents, communications, sensors, and other sources into continuously updated knowledge and process graphs. From this shared model, organizations can analyze their operations, simulate possible futures, automate workflows, and give AI agents the context they need to act reliably.

Our mission is to solve information failure and enable everybody to make the right decisions. We work on difficult technical and commercial problems, including applications in regulated and safety‑critical environments.

About the role

HASH has no shortage of substance to communicate: open‑source infrastructure, frontier AI research, visual products, real enterprise problems and a clear point of view about how AI should reason over a changing world. We’re hiring a Marketing & Communications Lead to turn that substance into a coherent system that reaches the right people and gives them useful reasons to keep engaging with us.

You will own content, lifecycle email, newsletters, social channels, SEO, website marketing copy and marketing operations. You’ll decide what we should communicate, to whom, in what form and why. You’ll write and edit much of the work yourself, draw expertise from researchers, engineers and customer‑facing colleagues, brief our brand designers, automate distribution and measure what the audience does next.

This is a senior, hands‑on individual‑contributor role. It is not a job for someone who wants to write a strategy and delegate execution to a large team. You will build the function while operating it.

Requirements

• Exceptional writing and editing, with a portfolio that makes complicated ideas feel clear, specific and important
• Hands‑on ownership of several of lifecycle email, newsletters, technical content, social distribution, SEO, product marketing or marketing operations
• The ability to build automated journeys, segments and measurement yourself rather than waiting for a dedicated operations team
• Strong editorial judgment and a clear understanding of the difference between material that earns attention and content produced to fill a calendar
• Commercial awareness without the instinct to make every communication sound like an advertisement
• The ability to learn unfamiliar technical subjects, identify the real idea and preserve accuracy while improving the explanation
• Thoughtful use of AI and automation for leverage, while retaining responsibility for every published claim
• High agency and the ability to sustain a demanding cadence without sacrificing quality

Experience with enterprise AI, data infrastructure, developer tools, simulation, analytics or another technical B2B product is useful. So is experience building an early‑stage marketing function and communicating to multiple members of an enterprise buying committee. Excellent written and spoken English is essential.

What you'll do

• Develop a clear positioning and message system for technical, operational and executive audiences
• Own the experience after someone signs up: onboarding, activation, education, re‑engagement and appropriate routes into a commercial conversation
• Plan, write and operate newsletters for relevant audience segments
• Build a distinctive, reliable social presence and adapt strong ideas intelligently across formats
• Own the blog calendar and personally write, commission or edit technical explainers, points of view, customer stories, product announcements and use‑case content
• Interview researchers, engineers, customers and partners and turn their knowledge into accurate, compelling material
• Research search demand and competitive results, identify areas where HASH can earn authority, and create high‑quality SEO briefs and content clusters
• Improve website and landing‑page copy, calls to action and conversion paths
• Build and maintain marketing automation, segmentation, lead scoring, instrumentation and reporting
• Create useful sales‑enablement material and keep it current
• Brief and prioritize the Senior Brand Designer’s work across posts, email, campaigns, decks, reports and case studies
• Measure activation, qualified audience growth, organic discovery, inbound demand and sales influence, and change the programme when the evidence warrants it

Why HASH

• Work with substantive material spanning open source, enterprise deployments and frontier AI research
• Shape how a differentiated company and emerging category are understood
• Build the marketing and communications function with direct access to the founder and technical team
• Join at a moment of rapid growth, with outsized scope and influence
• Be part of a high‑agency team that cares about output, ownership and quality
• We’ve raised $5.5m+ from Silicon Valley VCs, and have contracted >$10m in revenue in the last 18 months. Our founding team have established and sold companies for tens of millions, hundreds of millions, and billions of dollars (including household names like Trello and Stack Overflow)

This role is probably not for you if...

• Your experience is limited to operating mature functions with established teams and processes
• You want to oversee marketing but do not want to get your hands dirty personally
• You prefer consensus to making a timely decision
• You want a narrow remit with predictable boundaries
• You are not interested in understanding a deeply technical product
• You simply want to scale an existing process, rather than develop, execute and iterate on strategy from the ground‑up
• You’re looking for a traditional 9‑5 comms or marketing job

A base salary will be offered of £90,000-120,000 in London.

Compensation in this role is extremely heavily performance-based, with generous equity/bonus offered in addition to the base salary, in order to align sales incentives.