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OCaml Developer
Ahrefs
Software EngineeringCambridge, Massachusetts, United States; Palo Alto, California, United States; Singapore; Tokyo, Japan
Job Description
<p>Ahrefs is looking for a backend developer with deep understanding of networks, distributed systems, OS fundamentals and taste for simple and efficient architectural designs. Our backend is mostly implemented in OCaml with some C++.</p>
<p><strong>This role is based out of one of our offices — Palo Alto, Cambridge (MA), Singapore or Tokyo.</strong> You can be based in whichever of these you have the legal right to work in, but this is an on-site role: we're looking for someone who'll be in the office with the team.</p>
<p>In this role, be prepared to deal with 25 petabytes of live data, OCaml and Linux on a daily basis.</p>
<p><a href="https://ahrefs.wistia.com/medias/wbtc0hdgmz?wvideo=wbtc0hdgmz"><img style="width: 400px; max-width: 100%;" src="https://embed-ssl.wistia.com/deliveries/723a79645b75afcecbd5ef3935e019eb.jpg?image_play_button_size=2x&image_crop_resized=960x540&image_play_button=1&image_play_button_color=2949E5e0" width="300"></a></p>
<p><a href="https://ahrefs.wistia.com/medias/wbtc0hdgmz?wvideo=wbtc0hdgmz">Ahrefs OCaml</a></p>
<h3>Basic Requirements:</h3>
<ul>
<li>Proficiency in OCaml</li>
<li>Knowledge of C++ is a plus but not essential</li>
</ul>
<h3>The ideal candidate is expected to:</h3>
<ul>
<li>Independently deal with bugs, schedule tasks and investigate code</li>
<li>Make well-reasoned technical choices and take responsibility for them</li>
<li>Understand the whole technology stack at all levels: from network and user-space code to OS internals and hardware</li>
<li>Handle full development cycle of a single component i.e. formalize task, write code and tests, setup and support production, resolve user requests</li>
<li>Approach problems with a practical mindset and suppress perfectionism when time is a priority</li>
<li>Write flexible, maintainable code and adapt to post-launch requirements/tweaks</li>
</ul>
<p>These requirements stem naturally from our approach to development with fast feedback cycle, highly-focused personal areas of responsibility and strong tendency to vertical component splitting.</p>
<p>If your preference is leaning towards making the web functional and working on user-facing stuff, you may want to consider our <a href="https://ahrefs.com/jobs/reasonml-developer">ReasonML</a> position instead.</p>
<h3>What You Get</h3>
<p>We offer:</p>
<ul>
<li class="c-mrkdwn__pre" data-stringify-type="pre">Competitive compensation package</li>
<li class="c-mrkdwn__pre" data-stringify-type="pre">Informal and thriving work atmosphere</li>
<li class="c-mrkdwn__pre" data-stringify-type="pre">Above-average perks and fringe benefits</li>
<li class="c-mrkdwn__pre" data-stringify-type="pre">First-class workplace (hardware, software, etc) in the <a href="https://www.youtube.com/watch?v=0m1rZ2KTLIQ" target="_blank">modern office</a></li>
</ul>
<p><strong>Location:</strong> Palo Alto, Cambridge (MA), Singapore or Tokyo — on-site</p><div class="content-conclusion"><p>Ahrefs does not engage with agencies or third party recruitment solutions for the roles we hire for. If at any point we need help, we'll let you know! </p></div>
Listing closes 4 Dec 2026.
Apply directly through the original listing. The employer’s page has the latest application details.