Substack

iOS Engineer

• Build and support features to bring readers and writers to Substack and help them succeed.
• Develop the core Substack iOS app in Swift for creators and their audiences.
• Iterate on key user flows in the Substack iOS App, and run A/B tests on these flows.
• Collaborate with designers, product thinkers, writers, support staff, and others from product concept and research to implementation and deployment.
• Own work end-to-end and deliver high-quality solutions.
• Work directly with customers to solve their problems and participate in customer support.

Systems Engineer

• Design and build scalable ML infrastructure including model serving systems, feature stores, and training pipelines
• Develop and maintain robust data pipelines for ML workflows, from data ingestion to model deployment
• Implement MLOps best practices including CI/CD for ML models, monitoring, and automated retraining pipelines
• Build and optimize model serving infrastructure to support real-time and batch inference at scale
• Collaborate with ML engineers and data scientists to understand infrastructure requirements and translate them into reliable systems
• Monitor and optimize ML system performance, reliability, and cost efficiency
• Establish infrastructure standards and tooling to accelerate ML development workflows
• Own the deployment and operational aspects of ML models in production

Machine Learning Systems Engineer

Full-stack Engineer

• Develop the core Substack product for readers and writers across APIs, low-level services, databases, frontend UI, and testing.
• Work on live streaming, video recording, uploading, clipping, and all video product experiences.
• Support and collaborate with engineers, designers, writers, support staff, and others.
• Own work from product concept through implementation, experimentation, and measurement.
• Work directly with customers to solve their problems and participate in customer support.
• Use TypeScript, Node/Express, React, and Postgres; learn or apply these technologies.

Software Engineer, Video

Technical Recruiter

• Substack is building a new economic engine for culture, empowering independent writers, artists, videographers, podcasters, and creators to make a living through subscriptions.
• Drive Technical Recruitment Processes: lead end-to-end recruitment activities from role kick-offs and sourcing to interviews, debriefs, and offers.
• Develop Diverse Talent Pipelines: implement inclusive sourcing strategies and leverage innovative channels to build a diverse pool of qualified candidates.
• Enhance Candidate Experience: design and deliver a highly engaging, professional, and memorable experience.
• Data-Driven Recruitment: establish, monitor, and analyze key recruiting metrics to optimize processes and forecast hiring needs.

Compliance

• Manage the regulatory workflows and ensure timely completion of requests for various regulations such as GDPR, CCPA, OSA
• Enforce Substack’s content guidelines by moderating flagged content and responding to tickets related to spam, copyright issues, content violations, data subject access requests, appeals, and account recovery
• Efficiently manage moderation and regulatory queues, maintaining accuracy while handling a large number of tickets daily
• Suggest improvements to our policies, procedures, tooling, and strategy to make the team more effective
• Collaborate with Engineering, Product, and Partnerships to investigate complex, and at times urgent, issues facing users and the platform
• This is a full-time role with a Tuesday - Saturday schedule. Candidates are ideally located in SF and able to work in-person at least two days per week. We are also open to exceptional remote candidates based in the US or Canada

iOS Engineer

Machine Learning Systems Engineer

Software Engineer, Video

Technical Recruiter

Standards & Enforcement Specialist, Regulatory