<h3>Preferred Qualifications</h3>
<ul>
<li>Experience building atop streaming technologies such as Kafka/Spark</li>
<li>Experience providing technical leadership and mentoring other engineers for best practices on data engineering</li>
<li>Knowledge of software engineering best practices across the development lifecycle, including agile methodologies, coding standards, code reviews, source management, build processes, testing, and operations</li>
<li>Experience as founder, foundational member or early employee of an early-stage start up - or delivering in another high-pressure environment</li>
<li>You understand how to prioritize scarce resources and default to action, getting the most important things done</li>
</ul>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>US-based candidates: access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b></li>
<li>UK-based candidates: access to a tax-optimized <b>salary sacrifice pension</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li></ul>

<h3>About this role</h3>
<p>We're hiring an experienced Systems Engineer (Rust) to join our team in order to help lead the build-out of our data integration, transformation and pipeline tools. HASH develops open-source software that provides users with advanced predictive analytics, agent-simulation and ontology management capabilities.</p>
<p>We are hiring globally for this role, working either from our London (UK) office or along UK/Western European time zones. Depending on circumstance and preference, the opportunity exists for in-person or remote work.</p>

Systems Engineer (Rust)

<h3>Nice to have</h3>
<ul>
<li>Experience with Redis, Postgres, Citus, and JS frameworks like Next.js and ProseMirror (or Tiptap).</li>
<li>Experience as founder, foundational member or early employee of <b>early-stage</b> start up</li>
<li>Established track record starting <b>communities</b> or <b>cultures</b> that share HASH’s values</li>
<li>You are a <b>team player</b>, but first and foremost a <b>leader</b>. You are willing to push changes, while ensuring that everyone on your team has a clearly-defined and fulfilling role in which they are able to act efficiently, resulting in the fast delivery of features to our customers</li>
<li>You know when to take on <b>tech leverage</b> (eg. for a demo under short deadlines), and when to ship fully polished features</li>
<li>You understand how to <b>prioritize</b> scarce resources and <b>default to action</b>, getting things done. Experience working as part of or leading high-velocity <b>remote</b> teams</li>
</ul>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>US-based candidates: access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li></ul>

<i>This role is open to remote candidates willing to work East Coast (US) or European timezones, as well as those in London (UK) who wish to work in-office, or in a hybrid capacity.</i>

<h3>About this role</h3>
<p>We're hiring an engineering manager to lead our HASH Graph team. In this role, you'll ensure that features are pushed fast and quality delivery is achieved across our open-source platform for <b>ingesting and structuring</b> unstructured data, for use in simulation and analytics environments. We're hiring globally for this role, and are open to candidates looking for remote work on East Coast (US) and London (Europe) time zones.</p>

Engineering Manager (Graph)

<h3>Also beneficial</h3>
<ul>
<li>Experience working as part of a high-velocity remote team</li>
<li>Experience building OT/CRDT-based collaborative multiplayer applications</li>
<li>Experience with any of Monaco, ProseMirror, Three.js, Plotly, or MapLibre</li>
<li>Experience building out scalable search solutions with ElasticSearch</li>
<li>Experience implementing i18n and l10n initiatives (in particular atop Next.js)</li>
<li>Experience managing a tech team, for instance as a CTO, VP of engineering</li>
<li>Significant contributions to or experience maintaining a leading open-source web library</li>
<li>Professional experience working with Rust and Kubernetes</li>
<li>Any demonstrable special aptitude for UX/UI</li>

</ul>
<p>We don't expect the successful candidate to have all of these things, but be sure to mention any that apply. We're looking for teammates who are biased towards action, and aren't afraid to get their hands dirty with prototyping work or other exploration to advance understanding and timelines. If you have expertise in a domain that isn't listed, but which you feel is relevant, let us know.</p>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days  of global annual holiday</b></li>
<li>US-based candidates: access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li></ul>

<h3>About this role</h3>
<p>We're hiring a senior technical architect to lead our platform team. In this role, you'll ensure that features are pushed fast and design the architecture of our new product: naturally structuring data on the web. We're hiring globally for this role, and are open to candidates looking for remote work on East Coast (US) and London (Europe) timezones.</p>

Senior Technical Architect

<h3>Also beneficial</h3>
<ul>
<li>Experience working as part of a high-velocity remote team</li>
<li>Experience with versioned graph or key-value databases</li>
<li>Experience building OT/CRDT-based collaborative multiplayer applications</li>
<li>Experience with any of Monaco, ProseMirror, Three.js, Plotly, or MapLibre</li>
<li>Experience building out scalable search solutions with ElasticSearch (or its equivalents)</li>
<li>Experience implementing i18n and l10n initiatives (in particular atop Next.js)</li>
<li>Any demonstrable special aptitude for UX/UI</li>
<li>Experience in Rust</li>

</ul>
<p>We don't expect the successful candidate to have all of these things, but be sure to mention any that apply. We're looking for teammates who are biased towards action, and aren't afraid to get their hands dirty with prototyping work or other exploration to advance understanding and timelines. If you have expertise in a domain that isn't listed, but which you feel is relevant, let us know.</p>

<h3>About this role</h3>
<p>We're hiring a senior fullstack engineer to join our platform team. In this role, you'll be tasked with pushing fast on features and helping to lead the architecture of HASH's graph and simulation products. We're hiring globally for this role, and are open to candidates looking for remote work on East Coast (US) and London (Europe) timezones.</p>

Fullstack Engineer (Web)

<h3>Nice to have</h3>
<ul>
<li>Experience as founder, foundational member or early employee of <b>early-stage</b> start up</li>
<li>Established track record starting <b>communities</b> or <b>cultures</b> that share HASH’s values</li>
<li>You are a <b>team player</b>, but first and foremost a <b>leader</b>. You are willing to push changes, while ensuring that everyone on your team has a clearly-defined and fulfilling role in which they are able to act efficiently, resulting in the fast delivery of features to our customers</li>
<li>You know when to take on <b>tech leverage</b> (eg. for a demo under short deadlines), and when to ship fully polished features</li>
<li>You understand how to <b>prioritize</b> scarce resources and <b>default to action</b>, getting things done. Experience working as part of or leading high-velocity <b>remote</b> teams</li>
</ul>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>US-based candidates: access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li></ul>

<i>This role is open to remote candidates willing to work European timezones, as well as those in London (UK) who wish to work in-office, or in a hybrid capacity.</i>

<h3>About this role</h3>
<p>We're hiring an engineering manager to lead our Simulation Product team. In this role, you'll ensure that features are pushed fast and quality delivery is achieved across our simulation compute platform, IDE, and open-source engine. We're hiring globally for this role, with a special focus on candidates looking for remote work across European timezones - or an in-person role in London (UK).</p>

Engineering Manager (Simulations)

<h3>Also beneficial</h3>
<ul>
<li>Experience working as part of a high-velocity remote team</li>
<li>Experience building OT/CRDT-based collaborative multiplayer applications</li>
<li>Experience with any of Monaco, ProseMirror, Three.js, Plotly, or Mapbox/MapLibre</li>
<li>Experience implementing i18n and l10n initiatives (in particular atop Next.js)</li>
<li>Any demonstrable special aptitude for UX/UI</li>
</ul>
<p>We don't expect the successful candidate to have all of these things, but be sure to mention any that apply. We're looking for teammates who are biased towards action, and aren't afraid to get their hands dirty with prototyping work or other exploration to advance understanding and timelines. If you have expertise in a domain that isn't listed, but which you feel is relevant, let us know.</p>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary and equity</b></li>
<li><b>30 days annual holiday</b></li>
<li>A range of location-specific benefits, including access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b> for those working in the US.</li>
</ul>

<h3>About this role</h3>
<p>We're hiring a senior frontend engineer to join our platform team. In this role, you'll be tasked with pushing fast on features and helping to lead the architecture of HASH's graph and simulation products. We're hiring globally for this role, and are open to candidates looking for remote work on East Coast (US) and London (Europe) timezones.</p>

Frontend Engineer (Web)

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>Access to a tax-optimized <b>salary sacrifice pension</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li>
</ul>

<h3>About this role</h3>
<p>We're hiring a London-based Forward-Deployed Engineer to join us at HASH. In this role, you'll work directly with clients both capturing requirements and ideating/implementing solutions utilizing HASH's open-source technology. Your experiences will directly inform HASH's product roadmap, and this position demands both excellent interpersonal and technical skills, involving both internal and external stakeholder management as well as hands-on software engineering.</p>

Forward-Deployed Engineer

<h3>Nice to have</h3>
<ul>
<li>Prior interest in the Semantic Web and/or multi-agent simulation is not required, but will be advantageous.</li>
<li>Candidates should familiarize themselves with HASH's product offering prior to interview.</li>
<li>Cultivating a developer-centric community for HASH (from Discord servers through to Twitter meme accounts) will be central to success in this role. Prior evidence of an ability to grow a following, both for a brand and in a personal capacity, will be critical to success in this role.</li>
</ul>
<br />
<br />
<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>US-based candidates: access to a <b>401(k)</b> and <b>fully comprehensive health insurance</b></li>
<li>A range of other country and location-specific benefits. Let us know where you’re applying from!</li></ul>

<p>HASH is a venture-backed startup developing software that eliminates information failure, led by Joel Spolsky and David Wilkinson. We're looking for an experienced developer evangelist to join our team. The successful candidate will lead community-building and educational efforts around our forthcoming Block Protocol, and related open-source tools, reporting directly to the company's CEO.</p>

Developer Evangelist

<h3>Nice to have</h3>
<ul>
<li>Knowledge graph or other network, data, or simulation-specific <b>visualization</b> work within your portfolio.
</li>
<li>Prior experience outside of pure design: in either <b>product management</b>, or <b>data science</b>.
</li>
<li>A frontend development background is not required, but experience building <b>styled components</b> and working in the codebase of a <b>modern React application</b> will be beneficial if possessed.
</li>
<li>
Prior experience in visual/interaction design, <b>branding</b> & <b>identity</b>, and <b>typography</b>.
</li>
</ul>

<h3>About this role</h3>

<p>We’re hiring an experienced Product Designer motivated by the opportunity to deliver outstanding experiences for our users and help define our vision as a product design team—a ground floor opportunity in a design-first startup.
Join our fast-growing team to get autonomy, ownership, and have significant impact across the entire product, brand, and marketing stack. You will be responsible for the HASH design system and UI, working directly with our Design Lead (Maggie Appleton). We're hiring globally for this role, provided a working day overlap of at least 3-4 hours/day with London (Europe).</p>

Product Designer

<h3>Nice-to-have</h3>
<ul>
<li>Prior experience in Operations is not required, but may be beneficial (in particular if at a high-growth startup)</li>
<li>A demonstrable interest in operational analysis, strategy or finance</li>
</ul>

<h3>Pay & Benefits</h3>
<ul>
<li><b>Competitive salary</b> and <b>generous equity</b></li>
<li>At least <b>30 days of global annual holiday</b></li>
<li>Tax-optimized <b>salary sacrifice pension</b> available</li>
</ul>

<p>HASH is building the open-source stack for simulation. We’re on a mission to reduce information failure by making powerful simulation and decision-making tools available to everybody.</p>

<h3>About this role</h3>
<p>As an early member of our Operations team, you will be defining and building infrastructure that will allow us to execute and scale. You will work closely with Business Leadership, as well as cross functionally, to inform and drive results.</p>
<p>In addition to Operations, you will engage closely with other parts of the business, including Finance, Sales, Marketing, and Customer Success.</p>
<p>For this role we are specifically looking for applicants based in London, England (or willing and able to relocate).</p>

<h3>Day-to-day</h3>
<ul>
<li>Creating scalable systems for support, sales, marketing</li>
<li>Taking ownership of special projects spanning multiple areas of the business, including legal, finance, and go-to-market</li>
<li>Developing and interpreting business forecasts and analyses supporting the CEO and Board</li>
</ul>

Operations

<h5>No obvious fit?</h5>
<p>If you can’t see an obvious role, but you are still interested in HASH, let us know a little bit about your interest and enter our <a href="https://hash.ai/careers/general">General Pool.</a></p>

<h4>We're doers</h4>
<p><strong>Fast-moving, rapidly growing, and intensely focused on our mission</strong>, we're motivated by the promise of a world based on better decision-making.</p>

<h4>Clear ownership</h4>
<p>Small teams with individual ownership are key in our approach to getting things done. All of our employees own equity.</p>

<h4>Intensely driven</h4>
<p>We’re building a <strong>high-expectation</strong>, <strong>high-reward environment</strong> for thoughtful people who want to work hard, have impact, and be surrounded by likeminded colleagues.</p>

<h4>Not for everybody</h4>
<p>If this isn’t you, we may not be a good fit. You can still contribute to our <a href="https://hash.dev/">open-source projects</a> or publish to <a href="https://hash.ai/platform/index">our community</a>.</p>

Opportunities

Current Openings

Product Engineering

Deployed Engineering

Design

Other Opportunities

No obvious fit?

Working at HASH

We're doers

Clear ownership

Intensely driven

Not for everybody