Full-Stack Software Engineer

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.

Role
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.

Responsibilities

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

Qualifications

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

Nice to Have

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

Compensation
We offer a competitive salary, early‑stage equity, and the opportunity to influence both our product and culture.

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 View email address on click.appcast.io 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.

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