Senior/Staff Backend Engineer - Commerce

Company: Together AI
Location: San Francisco
Posted on: April 1, 2026

Job Description:

About the Role Together AI is seeking a Senior Backend Engineer to shape, build, and scale the commerce platform that drives our Together’s Cloud products. As a member of the Commerce Engineering team, you will develop and work on mission-critical commerce capabilities including usage-based billing, payment processing, customer-facing analytics, and product entitlements. This role is ideal for an engineer who enjoys working close to the product surface: defining data models, designing clean backend APIs, and partnering closely with Product, Product Engineering, and other cross-functional teams to turn business requirements into reliable, scalable systems. You will help translate product and pricing strategy into durable backend primitives that directly impact revenue and customer experience. Requirements 6 years of experience building large-scale, fault-tolerant API-driven services and backend systems Strong experience designing relational database schemas and backend APIs that support product and business requirements Proven ability to work cross-functionally with product and client engineering teams to deliver end-to-end features Deep understanding of system scalability, reliability, and performance tradeoffs in distributed systems Excellent understanding of low level operating systems concepts including multi-threading, memory management, networking and storage, performance and scale Expert-level proficiency in one or more of Golang, TypeScript, Python, C++, or Java Experience with infrastructure as code (Terraform, AWS CDK, Pulumi) and CI/CD workflows Experience with payment processors (e.g. Stripe) and billing systems a plus Experience with Kubernetes, or containers a plus Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or a related technical field, or equivalent practical experience Responsibilities Design and build foundational backend services that power Together’s monetization and commerce stack, including billing, payments, entitlements, and usage tracking Partner cross-functionally with Product Managers, Finance, and Go-To-Market teams to understand requirements and deliver systems aligned with business goals Own data modeling and schema design for core commerce entities, ensuring correctness, scalability, and long-term flexibility Define and evolve backend API contracts in close collaboration with client engineers, enabling high-quality customer-facing product experiences Analyze and improve the scalability, reliability, and performance of existing commerce APIs, databases, and distributed systems Participate in design reviews, code reviews, documentation, and incident response to uphold a high engineering bar About Together AI Together AI is a research-driven artificial intelligence company. We believe open and transparent AI systems will drive innovation and create the best outcomes for society, and together we are on a mission to significantly lower the cost of modern AI systems by co-designing software, hardware, algorithms, and models. We have contributed to leading open-source research, models, and datasets to advance the frontier of AI, and our team has been behind technological advancement such as FlashAttention, Hyena, FlexGen, and RedPajama. We invite you to join a passionate group of researchers and engineers in our journey in building the next generation AI infrastructure. Compensation We offer competitive compensation, startup equity, health insurance and other competitive benefits. The US base salary range for this full-time position is: $160,000 - $250,000 equity benefits. Our salary ranges are determined by location, level and role. Individual compensation will be determined by experience, skills, and job-related knowledge. Equal Opportunity Together AI is an Equal Opportunity Employer and is proud to offer equal employment opportunity to everyone regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and more. Please see our privacy policy at https://www.together.ai/privacy

Keywords: Together AI, San Rafael , Senior/Staff Backend Engineer - Commerce, Engineering , San Francisco, California