Together AI is a research-driven artificial intelligence company. We contribute leading open-source research, models, and datasets to advance the frontier of AI. Our decentralized cloud services…
Together AI is a research-driven artificial intelligence company. We contribute leading open-source research, models, and datasets to advance the frontier of AI. Our decentralized cloud services…
Core product: AI-native cloud for training, fine-tuning, and inference on optimized GPU clusters
Total disclosed funding: USD 533,500,000
Employee count: 329
Company Overview
Problem Domain
AI infrastructure and platform for training, fine-tuning, and inference of large generative models
Founded
2022
Industry
Software Development
Funding Track Record
Seed- May 2023
USD 20,000,000
Series A- November 29, 2023
USD 102,500,000
Series B- February 20, 2025
USD 305,000,000
Valuation reported at $3.3 billion
Strategic / Growth- March 13, 2024
USD 106,000,000
Investor Signal
“Participation from strategic investors including NVIDIA and Salesforce Ventures; multiple tier-one VCs across rounds”
Founders
What we do
Join the Team
Staff Engineer
On-SiteSan Francisco Bay Area, US
On-Site • San Francisco Bay Area, US
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Who you are
8+ years of experience building and operating large-scale, distributed backend systems in production environments
Proven experience building or significantly evolving an API platform used by multiple teams or customer-facing products
Expert-level proficiency in one or more of Golang, TypeScript, C++, or Java
Deep expertise in API performance and scalability, including caching strategies, rate limiting, parallelization, fan-out control, and graceful degradation
Strong experience designing and implementing production-grade authentication and authorization systems for customer-facing APIs
Demonstrated ability to drive cross-team architectural initiatives without formal authority, aligning multiple stakeholders around long-term platform direction
Experience building and operating systems using Infrastructure as Code (Terraform, AWS CDK, Pulumi) and modern CI/CD workflows
Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or equivalent practical experience
Experience with GraphQL or schema-based API federation systems
Experience evolving APIs from monoliths to modular, platform-oriented architectures
Experience designing and operating API schema generation and validation systems
Experience building developer-facing SDKs or command-line tools
Experience designing and operating multi-region, globally distributed API systems
Experience designing horizontally scalable API systems capable of handling high request volume and burst traffic patterns
Experience running production workloads in Kubernetes-based environments
Experience building services in zero-trust or identity-aware architectures
Experience with AWS networking, traffic management, and load balancing
Experience with Cloudflare or CDN-level API performance optimization
What the job involves
Benefits
Competitive health insurance plans
Dental and vision insurance
Pre-tax flexible spending accounts
Mental health support and services
Income protection & retirement
401(k) plan
AD&D insurance
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Full-time • Manchester, GB
Together 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 APIs — including public customer APIs used directly by customers and via SDKs, CLIs, as well as the client APIs powering Together’s Cloud UI
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
Design and drive the evolution of Together’s API platform, defining how APIs are built, versioned, secured, tested, and operated across the company
Own and improve the backend API layer within our primary Next.js monolith, raising the bar on consistency, reliability, and performance
Architect and lead the transition toward scalable, purpose-built API platforms optimized for different traffic patterns and product surfaces
Write and maintain critical-path platform code that multiple services and product teams depend on
Design and implement robust authentication, authorization, and identity-aware access patterns across public and internal APIs
Establish performance standards for high-throughput APIs, implementing caching, rate limiting, fan-out control, and graceful degradation strategies
Raise the bar on API observability and reliability, defining SLOs, monitoring, alerting, and incident response practices
Drive API data modeling and schema generation strategies to ensure long-term maintainability and developer ergonomics
Partner with infrastructure and security teams to maintain a strong security posture and evolve toward zero-trust architectures
Mentor engineers, influence architectural direction across teams, and help define hiring standards as the API Platform grows
