Software Engineer, Ads

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Team Description

Reddit is poised to rapidly innovate and grow like no other time in its history. We’re currently hiring across multiple teams, some of these teams include:

Ads ML Serving Team
The Ads ML Serving team is part of Reddit’s Ads ML Platform, which builds the infrastructure and tools that power machine learning across Ads. This team focuses on creating a highly reliable, scalable, and efficient ML serving stack. Their work includes evolving long-term serving architecture, integrating closely with the ads serving stack, optimizing CPU/GPU performance, and building model velocity tools like observability libraries and model quality gating.

Attribution & Identity Team
The Attribution & Identity team builds products that help advertisers understand and measure the impact of their campaigns. They focus on attribution systems, identity solutions, and advertiser experimentation tools that improve performance insights and usability. Their goal is to make Reddit’s advertising platform more effective, transparent, and data-driven.

Ads Growth Team
The Ads Growth team drives initiatives to expand Reddit’s advertiser base, with a focus on Small to Medium Businesses (SMBs). We build and scale the technical foundation for key product pillars that enable SMB advertisers to succeed on Reddit. Our work spans collaboration with product, design, marketing, data science, UX, and sales teams to deliver measurable business outcomes.
We prioritize iterative development, rapid shipping, rigorous testing, and building capabilities that create step-change growth. Our goal is to multiply the number of monthly active advertisers by delivering impactful tools, features, and experiences tailored to the needs of SMBs.

Role Description:

This is a generalist mid-level backend position within the Ads Organization. Ads is the fuel that powers Reddit’s mission. As a backend engineer on the team, candidates might work on:

• Microservices and APIs that power our advertiser-facing product, ads.reddit.com
• Distributed systems that ensure the right ad gets shown to the right user at the right time
• Backends that power interactive user experiences on our ads like Polls and Games
• Real time, data intensive systems that measure the performance of our ad campaigns
• Infrastructure that supports all of the above

Technologies used on the team include:

• Languages: Go, Python, Scala
• Frameworks: Spark, Thrift, Baseplate, Kafka
• Datastores: Postgres, BigQuery, Redis, Druid 
• Tools: Kubernetes, Argo, Docker

Mid-level engineers are expected to absorb best practices and learn exceptionally quickly while being effective core contributors. Engineers at this level must be able to code independently, but may work with senior engineers on the design of complex solutions. The most important skills an engineer at this level must possess are 1) coachability and an eagerness to grow, 2) deep passion for coding, and 3) excellent independent learning skills, all while operating as a fully functioning member of an engineering team.

Responsibilities:

• Work with product managers to design and implement Ads products.
• Collaborate closely with the platform and data teams while building new features.
• Lead the processes needed to improve operational stability, including improving code quality, delivering dashboards and data visualizations.
• Build extensible components that would align with the product objectives. 
• Support day to day project management tasks including communicating project updates, managing project timelines and overseeing project execution.  

Required Qualifications:

• 3+ years of software development experience in one or more general purpose programming languages (Java, Scala, Go, C++, Python).
• Able to take complete ownership of a feature or project.

Bonus Points:

• Experience working in the Ads domain 
• Experience or interest in the advertising business and understanding customer needs

Benefits:

• Comprehensive Healthcare Benefits
• 401k Matching
• Workspace benefits for your home office
• Personal & Professional development funds
• Family Planning Support
• Flexible Vacation (please use them!) & Reddit Global Wellness Days
• 4+ months paid Parental Leave
• Paid Volunteer time off

In select roles and locations, the interviews will be recorded, and transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out recording, transcription and summarization prior to any scheduled interviews.

During the interview, we will collect the following categories of personal information: Identifiers, Professional and Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you choose to share with us. We will use this information to evaluate your application for employment or an independent contractor role, as applicable.  We will not sell your personal information or disclose it to any third party for their marketing purposes.  We will delete any recording of your interview promptly after making a hiring decision.  For more information about how we will handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential Employees and Contractors.

Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve.  Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview process, please let your recruiter know.