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Software Engineer, Backend

Software Engineer, Backend

BraintrustSan Francisco, CA, United States
5 days ago
Job type
  • Full-time
Job description

About the company

Braintrust is building the modern platform for evaluating and deploying AI systems. Our mission is to help enterprises build trust in their AI by making it easy to test, monitor, and improve models using real-world evaluation frameworks. We work with cutting-edge customers in finance, healthcare, and tech who are building production-grade AI systems.

About the role

We’re looking for a backend engineer who’s excited to build the infrastructure behind cutting-edge AI development tools.

Under the hood, Braintrust is a real-time, high-availability data platform that operates in both SaaS and self-hosted environments. You’ll help scale our ingestion pipelines, evolve our open source libraries, and ensure everything runs reliably, observably, and fast. If you thrive in a fast-paced environment and enjoy solving hard systems problems with a product mindset, we’d love to work with you.

What you'll do

As a backend engineer at Braintrust, you’ll help build the core platform powering LLM-native development :

Design and ship features that give users deep insight into their LLM usage and performance.

Integrate, proxy, cache, and collect data from OpenAI, Anthropic, Gemini, and other major model providers that our customers rely on.

Develop and evolve robust, efficient open source libraries for tracing and evaluating LLM calls inside customer applications. Check out our SDKs

Build highly available real-time data pipelines to ingest, store, and query large volumes of structured and semi-structured AI usage data.

You will also collaborate closely with our product engineers to ship polished, end-to-end features that solve real problems for our customers, such as :

Bundling and uploading javascript and python code snippets to be used as online, on-demand function calls for LLM workflows.

Support for parsing and uploading attachments from LLM multimodal outputs into long term storage.

Role-based access controls and data retention policies for enterprise use cases.

Ideal candidate credentials

5+ years of backend engineering experience across multiple parts of the stack

Strong systems thinking : you’ve owned or contributed to infrastructure projects and know how to design for scale, uptime, and data integrity

Proficient in modern backend technologies (e.g., Node.js, Go, Python, Rust, Postgres, Redis, Terraform, Docker, AWS)

Experience with observability tooling (e.g., Grafana, Prometheus, Datadog, or similar) and a passion for making systems operable, available and rock solid.

Comfortable with ambiguous problems and excited to partner across the company to ship impactful work

Clear communicator who documents decisions, shares context, and helps lift the team

Benefits include

Medical, dental, and vision insurance

401k plan

Daily lunch, snacks, and beverages

Flexible time off

Competitive salary and equity

AI Stipend

Equal opportunity

Braintrust is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.

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Backend Software Engineer • San Francisco, CA, United States

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