Full-Stack Software Engineer
Concentrate AI
Full-Stack Software Engineer
Concentrate AI
Unified API for multi-provider LLMs
Concentrate provides one OpenAI-compatible API to access, route, and manage models across leading AI providers and open-source models through a single endpoint. We help teams save time, lower token spend, improve reliability, and avoid vendor lock-in.
Supported by top-tier VCs. This is a remote role with preference for SF based candidates.
We’re looking for a Full-Stack Software Engineer who can own features end-to-end, from database schema design through production deployment.
You’ll work across our entire stack to build customer-facing products and internal tools, with significant autonomy and direct impact on the business.
Design and implement full-stack features using modern TypeScript across the frontend and backend
Architect, build, and maintain robust RESTful APIs with proper authentication, validation, and error handling
Maintain high engineering standards through comprehensive testing, including unit, integration, and end-to-end tests
Containerize and deploy services using Docker and CI/CD pipelines
Collaborate closely with the founding team on product direction, architecture, and technical strategy
Contribute to scalable, maintainable system architecture in a fast-moving startup environment
2+ years of experience
Strong proficiency with TypeScript and Node.js
Experience building production-grade frontends with React; Next.js preferred
Familiarity with modern frontend tooling, such as Tailwind and component libraries
Backend development experience with frameworks like Fastify or similar
Solid understanding of PostgreSQL, including schema design and query performance
Familiarity with Docker, CI/CD workflows, and cloud deployment environments
Experience implementing secure authentication flows, such as JWT or OAuth
Strong testing discipline — you write tests as part of building features, not after the fact
Experience with type-safe ORMs such as Kysely, Drizzle, or similar
Knowledge of Redis for caching and performance optimization
Comfort with Nginx configuration, reverse proxies, and SSL/TLS setup
Experience with monorepo tooling such as Turborepo or Nx
Prior work on SaaS platforms or multi-tenant architectures
Candidates complete a take-home technical assessment aligned with our real engineering work: building a small but complete application involving multiple user roles, API design, authentication, testing, and deployment.
We evaluate code quality, architectural decisions, and your approach to trade-offs — not trick questions.
We offer a competitive salary, early-stage equity, and the opportunity to influence both our product and culture.
If you thrive on ownership and want to help shape a company from its earliest days, you’ll fit right in.
FAQs
What is Concentrate AI?
Concentrate AI is an OpenAI-compatible API and fully managed multi-provider LLM platform that lets teams access, route, and manage models from leading AI providers and open-source models through one secure endpoint.
How is Concentrate different from OpenRouter?
Concentrate is similar to OpenRouter, but built for enterprise teams that need stronger security, rich usage analytics, centralized billing, production reliability, model fallbacks through a fully managed platform.
How is Concentrate different from LiteLLM?
LiteLLM is a flexible developer tool for routing LLM calls, while Concentrate is a secure, fully managed, enterprise-ready platform with provider routing, model fallbacks, observability, usage analytics, centralized billing, and one bill for all token usage.
Equal Opportunity & Fair Chance Notice
Concentrate AI is an affirmative action and equal opportunity employer. We are committed to providing equal employment opportunities and do not discriminate in recruiting, hiring, training, promotion, or other employment practices on the basis of race, color, sex, age, religion, national origin, ancestry, protected veteran status, disability, sexual orientation, gender identity or expression, genetic information, or any other status protected by applicable law.
Qualified applicants with arrest and conviction records will be considered in accordance with the San Francisco Fair Chance Ordinance and applicable state and local laws.
California Privacy Notice
California residents may contact [email protected] for additional information regarding how we collect, use, and disclose personal information during the job application process.
Recruitment Agency Notice
Concentrate AI does not accept unsolicited resumes from recruitment agencies and is not responsible for any fees related to unsolicited submissions.
Unified API for multi-provider LLMs
Concentrate AI provides a unified API to access and manage large language models from many providers. It handles automatic failover and multi-provider redundancy so apps stay available even if one provider is down. It centralizes AI governance by managing API keys, permissions, and offering unified billing, logging, and analytics, with features like least-cost routing and caching to control costs. It works by offering smart routing to access over 10,000 models through a single interface, plus security and compliance tools such as data redaction, auditing, SSO, and chargebacks. The platform differentiates itself through end-to-end governance and cost-control capabilities across multiple providers, not just model access, aiming to give teams reliable, secure, and cost-efficient AI usage. Its goal is to help organizations run AI-powered applications across many providers with centralized control and visibility.
Explore more opportunities at Concentrate AI