---
title: 'Marketing & Communications Lead at HASH'
canonical: 'https://feeny.ai/job/marketing-communications-lead-hash-london-a2haat5mqgrw'
type: 'job'
last_seen: '2026-09-05'
---

# Marketing & Communications Lead at HASH

- **Company:** HASH
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-31
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.gem.com/hash/am9icG9zdDp6McQJy-dtT-qOhkwSJa5C

## Job description

## About HASH

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](https://hash.ai/about/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

## Benefits

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.

## About HASH

## Company Overview
- **One-liner**: HASH is an open-source platform for decision-making that integrates live data, constructs ontologies, and creates shared understanding through collaborative agent-based simulation and knowledge modeling tools.
- **Entity Type**: Private (Seed stage)
- **Headquarters**: London, United Kingdom
- **Founded**: 2019
- **Founders**: Joel Spolsky and Jude Allred

## Core Business
- Primary industry/industries: Technology, Information and Internet; Business Decision-making Software; Simulation & Modeling
- Target customers: B2B, Enterprise (with a focus on safety-critical supply chain, biopharmaceutical logistics, and complex systems modeling)
- Mission or purpose statement: "Eliminate information failure and help everybody make the right decisions."

## Products & Services
- **[HASH Platform (hash.ai/hash.dev)]**: An open-source, collaborative workspace for structured knowledge that integrates live data, enables ontology construction, and provides fast, distributed agent-based simulation. Combines knowledge capture and modeling tools for complex systems decision-making.
- **Block Protocol (blockprotocol.org)**: An open standard they drive for interoperable, data-driven blocks, contributing to the commons.
- **Open Source Simulation Engine**: Built in Rust/WASM, focused on agent-based simulation and formal verification of distributed systems.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metrics**: Annual Revenue of approximately $1 million; Total Funding of $2.5 million (1 seed round)
- **Notable Investors/Partners**: Zetta Venture Partners (Lead), Root Ventures, with 6 total investors in the seed round. They also work with the Advanced Research + Invention Agency (ARIA) and scientists from the University of Oxford.
- **Growth Signals**: Headcount grew 14.3% YoY (now 9 employees); actively recruiting for new engineering and research roles; conducting high-profile research programs with ARIA and Oxford on safety-critical supply chains; 2,460 LinkedIn followers with 15.6% yearly growth; employer rating of 5.0/5.0 on Wellfound.

## Competitive Advantages
- **Unique Open-Source Approach**: All core tools are open source, building trust and allowing external validation—rare in the decision-modeling space.
- **Technical Moat**: Combines graph-backed world models, formal verification, and agent-based simulation (Rust/WASM) with AI research. Very few companies operate at this specific intersection.
- **High-Impact Focus**: Working on genuinely hard problems (eliminating information failure) with safety-critical applications (supply chains, biopharma logistics), giving them a defensible niche.
- **Elite Talent Sourcing**: Proactively identify and hire exceptional people through their own tooling and community, not just open applications.

## Strategic Focus
- Current priorities: Building a next-generation platform for decision-making via graph-backed world models and AI; expanding into safety-critical supply chain management with government and research partners; advancing their open standard (Block Protocol).
- Direction for growth: Scaling the engineering team (Rust, TypeScript, Python), deepening AI research (graph learning, formal verification), and expanding use cases in complex systems simulation.

## Why Work Here
- **Culture & Work Style**: "We care about output, ownership, and quality." They value raw intelligence, high-energy, and standout performance. The team works in public, contributing heavily to open source.
- **In-Person Focus**: Operates in-person from offices in **London** (HQ) and **Berlin**, with company-wide get-togethers at least twice a year in Europe. Some remote flexibility is available (e.g., Full-Stack Engineer roles can be in-office or remote).
- **Compensation & Perks**: "Leading compensation" with meaningful equity, competitive salaries, an 'unlimited' equipment and learning allowance, and at least 30 days paid time-off each year.
- **Engineering Culture**: Work on hard problems in Rust, TypeScript, and Python, including formal verification, graph learning, and simulation. They emphasize a fast, conviction-based hiring process with decisions made "within days, not weeks."
- **Hiring Process**: A short introductory call followed by a focused work sample or technical deep-dive. Most hires begin with HASH reaching out, but candidates can apply for specific roles.

## Sources
1. [hash.ai](https://hash.ai/careers)
2. [hash.dev](https://hash.dev/careers)
3. [linkedin.com](https://linkedin.com/company/hashintel)
4. [builtin.com](https://builtin.com/company/hash)
5. [jobs.gem.com](https://jobs.gem.com/hash)
6. [blockprotocol.org](https://blockprotocol.org)

## Other roles at HASH

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- [Integrations Engineer](https://feeny.ai/job/integrations-engineer-hash-london-mt5wag63x2eb) — London, United Kingdom
- [Forward-Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-hash-london-b7q0bwqwmrqq) — London, United Kingdom
- [Design Engineer](https://feeny.ai/job/design-engineer-hash-london-gcmsp6c4ndwq) — London, United Kingdom
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- [Solutions Lead](https://feeny.ai/job/solutions-lead-hash-london-0tvys1wc1f5j) — London, United Kingdom
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