{"schemaVersion":"jobsearcher.job.v1","id":"cfffd700f02d3e16651d18ba","url":"https://jobsearcher.com/jobs/cfffd700f02d3e16651d18ba","canonicalUrl":"https://jobsearcher.com/jobs/cfffd700f02d3e16651d18ba","title":"Staff Engineer, API Core Platform","description":"Staff Engineer — API Core PlatformAbout The RoleTogether AI is seeking an experienced Backend Engineer to found Together’s API Platform team within the Production Foundations organization. In this role, you will define, build, and scale the core systems and architecture that power Together’s mission-critical cloud control-plane APIs — including public customer APIs used directly by customers and through SDKs and CLIs, as well as the client APIs powering Together’s Cloud UI. This team is distinct from Together’s dedicated Inference API team, but partners closely with it to deliver a cohesive customer platform experience.In the near term, you will improve and standardize the backend API layer within our primary Next.js monolith, raising the bar on reliability, performance, and consistency. In parallel, you will design and lead the evolution toward scalable, purpose-built next-gen API platform solutions optimized for different Public API and Client API use cases and traffic patterns — defining the long-term architecture and driving its incremental rollout.This is a deeply hands-on role for an engineer who thrives on writing critical-path code and building platforms that unify engineering efforts across teams. You will work across backend systems, infrastructure layers, identity and access flows, and developer tooling to establish a cohesive API strategy that supports Together’s rapidly growing AI Cloud.ResponsibilitiesDesign and drive the evolution of Together’s API platform, defining how APIs are built, versioned, secured, tested, and operated across the companyOwn and improve the backend API layer within our primary Next.js monolith, raising the bar on consistency, reliability, and performanceArchitect and lead the transition toward scalable, purpose-built API platforms optimized for different traffic patterns and product surfacesWrite and maintain critical-path platform code that multiple services and product teams depend onDesign and implement robust authentication, authorization, and identity-aware access patterns across public and internal APIsEstablish performance standards for high-throughput APIs, implementing caching, rate limiting, fan-out control, and graceful degradation strategiesRaise the bar on API observability and reliability, defining SLOs, monitoring, alerting, and incident response practicesDrive API data modeling and schema generation strategies to ensure long-term maintainability and developer ergonomicsPartner with infrastructure and security teams to maintain a strong security posture and evolve toward zero-trust architecturesMentor engineers, influence architectural direction across teams, and help define hiring standards as the API Platform growsRequired Qualifications8+ years of experience building and operating large-scale, distributed backend systems in production environmentsProven experience building or significantly evolving an API platform used by multiple teams or customer-facing productsExpert-level proficiency in one or more of Golang, TypeScript, C++, or JavaDeep expertise in API performance and scalability, including caching strategies, rate limiting, parallelization, fan-out control, and graceful degradationStrong experience designing and implementing production-grade authentication and authorization systems for customer-facing APIsDemonstrated ability to drive cross-team architectural initiatives without formal authority, aligning multiple stakeholders around long-term platform directionExperience building and operating systems using Infrastructure as Code (Terraform, AWS CDK, Pulumi) and modern CI/CD workflowsBachelor’s or Master’s degree in Computer Science, Computer Engineering, or equivalent practical experienceNice to HaveExperience with GraphQL or schema-based API federation systemsExperience evolving APIs from monoliths to modular, platform-oriented architecturesExperience designing and operating API schema generation and validation systemsExperience building developer-facing SDKs or command-line toolsExperience designing and operating multi-region, globally distributed API systemsExperience designing horizontally scalable API systems capable of handling high request volume and burst traffic patternsExperience running production workloads in Kubernetes-based environmentsExperience building services in zero-trust or identity-aware architecturesExperience with AWS networking, traffic management, and load balancingExperience with Cloudflare or CDN-level API performance optimizationAbout Together AITogether 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 in our journey in building the next generation AI infrastructure.CompensationWe offer competitive compensation, startup equity, health insurance and other competitive benefits. The US base salary range for this full-time position is: $240,000 - $275,000 + 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 OpportunityTogether 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","company":"Together Ai","rawCompany":"together ai","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-04-09T13:28:48.723Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Staff Engineer, API Core Platform","description":"Staff Engineer — API Core PlatformAbout The RoleTogether AI is seeking an experienced Backend Engineer to found Together’s API Platform team within the Production Foundations organization. In this role, you will define, build, and scale the core systems and architecture that power Together’s mission-critical cloud control-plane APIs — including public customer APIs used directly by customers and through SDKs and CLIs, as well as the client APIs powering Together’s Cloud UI. This team is distinct from Together’s dedicated Inference API team, but partners closely with it to deliver a cohesive customer platform experience.In the near term, you will improve and standardize the backend API layer within our primary Next.js monolith, raising the bar on reliability, performance, and consistency. In parallel, you will design and lead the evolution toward scalable, purpose-built next-gen API platform solutions optimized for different Public API and Client API use cases and traffic patterns — defining the long-term architecture and driving its incremental rollout.This is a deeply hands-on role for an engineer who thrives on writing critical-path code and building platforms that unify engineering efforts across teams. You will work across backend systems, infrastructure layers, identity and access flows, and developer tooling to establish a cohesive API strategy that supports Together’s rapidly growing AI Cloud.ResponsibilitiesDesign and drive the evolution of Together’s API platform, defining how APIs are built, versioned, secured, tested, and operated across the companyOwn and improve the backend API layer within our primary Next.js monolith, raising the bar on consistency, reliability, and performanceArchitect and lead the transition toward scalable, purpose-built API platforms optimized for different traffic patterns and product surfacesWrite and maintain critical-path platform code that multiple services and product teams depend onDesign and implement robust authentication, authorization, and identity-aware access patterns across public and internal APIsEstablish performance standards for high-throughput APIs, implementing caching, rate limiting, fan-out control, and graceful degradation strategiesRaise the bar on API observability and reliability, defining SLOs, monitoring, alerting, and incident response practicesDrive API data modeling and schema generation strategies to ensure long-term maintainability and developer ergonomicsPartner with infrastructure and security teams to maintain a strong security posture and evolve toward zero-trust architecturesMentor engineers, influence architectural direction across teams, and help define hiring standards as the API Platform growsRequired Qualifications8+ years of experience building and operating large-scale, distributed backend systems in production environmentsProven experience building or significantly evolving an API platform used by multiple teams or customer-facing productsExpert-level proficiency in one or more of Golang, TypeScript, C++, or JavaDeep expertise in API performance and scalability, including caching strategies, rate limiting, parallelization, fan-out control, and graceful degradationStrong experience designing and implementing production-grade authentication and authorization systems for customer-facing APIsDemonstrated ability to drive cross-team architectural initiatives without formal authority, aligning multiple stakeholders around long-term platform directionExperience building and operating systems using Infrastructure as Code (Terraform, AWS CDK, Pulumi) and modern CI/CD workflowsBachelor’s or Master’s degree in Computer Science, Computer Engineering, or equivalent practical experienceNice to HaveExperience with GraphQL or schema-based API federation systemsExperience evolving APIs from monoliths to modular, platform-oriented architecturesExperience designing and operating API schema generation and validation systemsExperience building developer-facing SDKs or command-line toolsExperience designing and operating multi-region, globally distributed API systemsExperience designing horizontally scalable API systems capable of handling high request volume and burst traffic patternsExperience running production workloads in Kubernetes-based environmentsExperience building services in zero-trust or identity-aware architecturesExperience with AWS networking, traffic management, and load balancingExperience with Cloudflare or CDN-level API performance optimizationAbout Together AITogether 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 in our journey in building the next generation AI infrastructure.CompensationWe offer competitive compensation, startup equity, health insurance and other competitive benefits. The US base salary range for this full-time position is: $240,000 - $275,000 + equity + benefits. Our salary ranges are determined by location, level and role. 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