Design and ship the next generation ranking and ML backend systems that power discovery of Dev Platform apps and games across Reddit surfaces.
Champion reliability, observability, and experimentation best practices for ranking systems.
Write efficient, scalable code in our Go / Python / Baseplate / GraphQL stack.
Mentor engineers and lead technical discussions, shaping the long-term ranking and personalization strategy for Dev Platform. Who You Might Be 8+ years of
Requirements
With 100,000+ active communities and approximately 121 million daily active unique visitors, Reddit is one of the internet’s largest sources of information.
The Developer Platform team is building the future of Reddit: a future where third-party developers, moderators and everyday redditors can invent and ship brand-new apps, games and tools that create entirely new ways for communities to play, connect and get things done at reddit.
You’ll work end‑to‑end with a highly collaborative, cross‑functional group of engineers, PMs, designers, and data scientists who value impact, personal growth, openness, and kindness, and who ship quickly while holding a high bar for reliability and performance across Reddit’s web, mobile, and backend stack.
We are looking for a Staff Machine Learning Engineer, Developer Platform to build the ranking and personalization systems that connect redditors with their next favorite game or app on Reddit.
You will work closely with Product, Backend, Data Science, and Core Ranking/ML Platform teams to design and ship best-in-class ranking, retrieval, and experimentation systems that power discovery and re-engagement for Dev Platform experiences across feeds, surfaces, and notifications.
You’ll help define the ranking strategy for Developer Platform, stand up new ML models and feedback loops where none exist today, and turn noisy behavioral data into clear wins for users, creators, and developers.
Languages: Go, Python, C++ or any object oriented programming language
Libraries: Baseplate, GraphQL
Databases: Redis, Postgres, Memcached
Tools: Kubernetes, AWS
Tools: Kubernetes, Docker, AWS, GCP What You’ll Do
Partner with ML, DS, and product to define signals, APIs, and feedback loops for training, deploying, and iterating on ranking models.
experience as a software engineer building large-scale distributed systems and/or data-intensive, ML-driven systems, using Go, Python, C++, or another object-oriented language.
Experience designing and improving ML tooling and platforms: deployment and rollout, automation, experiment frameworks, system diagnosis, reproducibility, and ML monitoring/alerting. •
Experience designing and implementing performant, stable, and efficient ML or ranking systems (recommendation, ads, search, feed, or similar high-throughput decision systems).
Strong organizational skills with the ability to prioritize, sequence, and de-risk work, keeping complex projects on schedule with a high attention to detail.
BS in Computer Science or a related technical field, or equivalent practical experience.
Excellent communication skills: you collaborate effectively in a remote, cross-functional team, and can explain complex ML and ranking concepts to both technical and non-technical stakeholders. Benefits:
Additionally, Reddit offers a wide range of
In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI).
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.
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 provide greater transparency to candidates, we share base salary 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.
The base salary range for this position is: $230,000 — $322,000 USD
Contact
For more information, visit www.redditinc.com .
To learn more, please visit https://www.redditinc.com/careers/ .
Additional details
It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet.
We power everything from interactive custom posts and daily games to mod tooling and data products, giving builds the primitives they need to create entirely new kinds of experiences on Reddit.
Within Developer Platform, our Growth team focuses on helping redditors discover the right apps and games at the right time through ranking, notifications, and cross‑surface entry points, directly moving the needle on engagement and DAU for Dev Platform experiences.
You will own problems end-to-end from framing objectives and defining signals, to training and deploying models, to designing experiments and reading results—not just tuning existing knobs on mature systems.
This is a high-impact, 0→1 role where your work will directly shape how interactive apps and games show up on one of the largest sites in the world.
You’ll set technical direction for Dev Platform ranking, raise the bar on relevance and system reliability, and mentor other engineers as we scale a team of builders who value impact, personal growth, openness, and kindness.
Explore and productionize new retrieval, ranking, and experimentation approaches that unlock new Dev Platform experiences.
Proven track record working on cross-functional product teams (PM, Design, DS, Eng) where you owned end-user outcomes, not just models or infra, and shipped features that moved core product metrics. •
Comfortable with software engineering best practices: testing, code reviews, technical design docs, and clear documentation for other teams that depend on your systems.
Entrepreneurial mindset: you are self-directed, comfortable in ambiguity, and biased toward action in fast-paced environments.