Senior Machine Learning Engineer, Ranking - Quora (Remote)

Remote · Ireland · & 13 other countries · 3+ years experience · Full-time · Remote · Posted Oct 8, 2026

At a glance

Quora’s mission is to grow the world's collective intelligence. To do so, we have two platforms:
- Quora http://quora.com: a global knowledge sharing platform with millions of monthly unique visitors, bringing people together to share insights on various topics and providing a unique platform to learn and connect with others.
- Poe https://poe.com/: a cloud workspace where millions of users run multiple AI agents on shared context and tools. One subscription, every frontier model, and the collaboration layer that makes them work together.
Behind these products are passionate, collaborative, and high-performing global teams. We have a culture rooted in transparency, idea-sharing, and experimentation that allows us to celebrate success and grow together through meaningful work. Join us on this journey to create a positive impact and make a significant change in the world.
This role will be working on our Quora product.

As a ranking modeling expert, you will own and advance the second-phase ranking model behind feed and digest by applying the latest machine learning techniques.
You will play a key role in developing methodologies that other developers will build on top of while working on the Quora product's distribution team.

Improve our existing machine learning ranking models using your core coding skills and ML knowledge
Take end-to-end ownership of machine learning systems - data pipelines, candidate extraction, feature engineering, model training, as well as integration into our production systems
Identify new opportunities to apply machine learning to different parts of the Quora product
Work with other machine learning engineers to implement algorithms and systems efficiently

Availability for meetings and impromptu communication during Quora's “coordination hours” (Mon-Fri: 9am-3pm Pacific Time)
3+ years of professional experience working on recommendation or ranking models
Good understanding of mathematical foundations of machine learning algorithms
Previous experience building end-to-end machine learning systems
Good communication and interpersonal skills
BS, MS, or PhD in Computer Science, Engineering, or a related technical field

5+ years of experience writing Python or C++ code
Experience with generative recommendation systems
Experience with user behavior or user sequence modeling, transformers, or long sequence modeling applied to ranking
Experience with leading large-scale multi-engineer projects
Flexible and positive team player with outstanding interpersonal skills
Passion for Quora's mission and goals

Medical/dental/vision coverage
Equity refreshers
Remote work reimbursement
Paid time off
Employee assistance programs
Flexible equity program where a portion of equity compensation may be taken as cash (in equity-eligible countries)