Principal Machine Learning Engineer - Unified Embeddings

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 116 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit

www.redditinc.com

.

The Unified Embeddings team focuses on building highly expressive multi-entity large scale embeddings exploring architectures beyond standard two-tower approaches to enhance our recommendation systems at Reddit. This entails modeling various compound interactions and relationships between users and entities they interact with using Graphs and exploring Graph neural networks and transformers to encode them.

We are looking for a Principal Machine Learning Engineer to lead the design and architecture of GNN and transformers based multi-entity embedding generation actively participating in end-to-end implementation process including enabling efficient distributed training and serving for such architectures shaping the future of recommendation systems at Reddit.

If applying ML / AI in production to improve Reddit Relevance excites you, then you’ve found the right place.

RESPONSIBILITIES:

Lead the team that architects and designs GNN and transformers based multi-entity embedding generation.

Define the technical roadmap and plan of execution in collaboration with Xfn partners.

Develop and optimize large-scale graph-based machine learning pipelines for recommendation systems.

Architect scalable and efficient GNN and transformers-based recommendation models that can process complex, interconnected data structures.

Collaborate with cross functional business units such as Ads teams leveraging the models for upstream functions and improve relevance metrics.

Collaborate with ML Infrastructure teams to enable distributed GPU based training and online serving architecture

Lead feature engineering efforts to identify and curate expressive raw data to be used for creating embeddings

Be a mentor and cross-functional advocate for the team

Contribute towards team and product strategy, operations and execution at Reddit.

QUALIFICATIONS:

15+ years of Technical Leadership Experience

Proven ability to lead ML initiatives, mentor engineers, and communicate complex concepts to cross-functional teams.

Expertise in Graph Neural Networks, collaborative filtering, knowledge graphs, and deep learning for recommendations.

Understanding of graph theory, network science, and representation learning technique

Strong coding skills in Python and experience with ML frameworks like PyTorch Geometric (PyG), Deep Graph Library (DGL), TensorFlow, and scikit-learn.

Solid understanding of ML infrastructure components and libraries (data parallel, model parallel, pipeline parallel, torch.inductor, model pruning, etc.) enabling efficient distributed training and inference.

Reddit is seeking an Engineering Manager as a technical leader for our Small to Medium Business (SMB) focused Advertiser Growth efforts. In this role, you will be responsible for developing the technical foundation for mission critical product pillars, collaborating across the company to deliver outcomes for the Reddit Ads Business, and leading the team responsible for acquiring new advertisers on Reddit.

This role provides an opportunity to partner closely with cross-functional teams such as product, design, marketing, data science, UX and Sales, and, ultimately, to make a large number of small to medium businesses successful on Reddit.

As a leader for all of these efforts, you will set the engineering strategy for building iteratively, shipping quickly, testing rigorously, and adding step-change capabilities towards our ambitious goals of multiplying many times over our number of monthly active advertisers. This is an exciting moment in Reddit’s journey where we have the knowledge, resources and infrastructure to bring Reddit’s unique products to more people and help more small businesses be successful on our platform. This is an impactful opportunity to lead a team through an existing period of worldwide user and advertiser growth.

Responsibilities

Lead, coach, and grow a team of engineers across the stack, including mobile, frontend, and backend

Collaborate with designers and product managers to discover and build new Ad functionality and products. Be a thought leader in this process.

Maintain and enhance the team culture of fast iteration, experimentation, and collaboration.

Ensure the long term success of both the product and the growth of our people

Participate in and be the ultimate owner of the full development cycle: product ideation, design, development, QA, experimentation, analysis, and launch. You’ll be brainstorming, giving feedback on design docs, product specs and mocks, and generally helping out wherever is needed.

Collaborate with multiple teams across the entire company to make SMBs successful on reddit

Required Qualifications

Bachelor's degree (or foreign equivalent) in Computer Science, Computer Engineering, Engineering, Applied Sciences, Mathematics, Physics, or a related field

Engineering leadership experience working across multiple teams

At least 2 years of experience working on Ads products and/or growth engineering

5+ years of experience in software engineering

Experience Coordinating Large-scale, Cross-functional Efforts That Span Different Teams, And Driving Alignment

Experience Working With Multiple Teams In Product & Design

Knowledge of full stack product development practices (Frontend, Mobile, Backend)

Preferred Qualifications

Experience Working On Smb Related Products/projects

Reddit is seeking an Engineering Manager as a technical leader for our Small to Medium Business (SMB) focused Advertiser Growth efforts. In this role, you will be responsible for developing the technical foundation for mission critical product pillars, collaborating across the company to deliver outcomes for the Reddit Ads Business, and leading the team responsible for acquiring new advertisers on Reddit.

This role provides an opportunity to partner closely with cross-functional teams such as product, design, marketing, data science, UX and Sales, and, ultimately, to make a large number of small to medium businesses successful on Reddit.

As a leader for all of these efforts, you will set the engineering strategy for building iteratively, shipping quickly, testing rigorously, and adding step-change capabilities towards our ambitious goals of multiplying many times over our number of monthly active advertisers. This is an exciting moment in Reddit’s journey where we have the knowledge, resources and infrastructure to bring Reddit’s unique products to more people and help more small businesses be successful on our platform. This is an impactful opportunity to lead a team through an existing period of worldwide user and advertiser growth.

Responsibilities

Lead, coach, and grow a team of engineers across the stack, including mobile, frontend, and backend

Collaborate with designers and product managers to discover and build new Ad functionality and products. Be a thought leader in this process.

Maintain and enhance the team culture of fast iteration, experimentation, and collaboration.

Ensure the long term success of both the product and the growth of our people

Participate in and be the ultimate owner of the full development cycle: product ideation, design, development, QA, experimentation, analysis, and launch. You’ll be brainstorming, giving feedback on design docs, product specs and mocks, and generally helping out wherever is needed.

Collaborate with multiple teams across the entire company to make SMBs successful on reddit

Required Qualifications

Bachelor's degree (or foreign equivalent) in Computer Science, Computer Engineering, Engineering, Applied Sciences, Mathematics, Physics, or a related field

Engineering leadership experience working across multiple teams

At least 2 years of experience working on Ads products and/or growth engineering

5+ years of experience in software engineering

Experience Coordinating Large-scale, Cross-functional Efforts That Span Different Teams, And Driving Alignment

Experience Working With Multiple Teams In Product & Design

Knowledge of full stack product development practices (Frontend, Mobile, Backend)

Preferred Qualifications

Experience Working On Smb Related Products/projects

Benefits

Comprehensive Healthcare Benefits and Income Replacement Programs

401k with Employer Match

Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support

Family Planning Support

Gender-Affirming Care

Mental Health & Coaching Benefits

Flexible Vacation & Paid Volunteer Time Off

Generous Paid Parental Leave

Pay Transparency

This job posting may span more than one career level.

In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, and parental leave. To learn more, please visit

https://www.redditinc.com/careers/

.

To provide greater transparency to candidates, we share base pay ranges for all US-based job postings regardless of state. We set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant licenses/credentials, and may vary from the amounts listed below.

The Base Pay Range For This Position Is

$276,700

—

$387,400 USD

In select roles and l