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Cambridge, Massachusetts, United States; Palo Alto, California, United States; Singapore; Tokyo, Japan
Posted · 20.09.2026
Greenhouse (US)

# OCaml Developer

Ahrefs

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++. This role is based out of one of our offices — Palo Alto, Cambridge (MA), Singapore or Tokyo. 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. In this role, be prepared to deal with 25 petabytes of live data, OCaml and Linux on a daily basis. Ahrefs OCaml Basic Requirements: Proficiency in OCaml Knowledge of C++ is a plus but not essential The ideal candidate is expected to: Independently deal with bugs, schedule tasks and investigate code Make well-reasoned technical choices and take responsibility for them Understand the whole technology stack at all levels: from network and user-space code to OS internals and hardware Handle full development cycle of a single component i.e. formalize task, write code and tests, setup and support production, resolve user requests Approach problems with a practical mindset and suppress perfectionism when time is a priority Write flexible, maintainable code and adapt to post-launch requirements/tweaks 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. If your preference is leaning towards making the web functional and working on user-facing stuff, you may want to consider our ReasonML position instead. What You Get We offer: Competitive compensation package Informal and thriving work atmosphere Above-average perks and fringe benefits First-class workplace (hardware, software, etc) in the modern office Location: Palo Alto, Cambridge (MA), Singapore or Tokyo — on-siteAhrefs 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! 

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