Software Engineer, Backend San Francisco, New York City, +more

Braintrust Data, Inc.; San Francisco (CA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Daily lunch, snacks, and beverages

Flexible time off

Competitive salary and equity

AI Stipend

Job summary

Braintrust Data, Inc. is seeking a backend engineer to develop infrastructure for cutting-edge AI tools. You will design features for LLM performance insights, build real-time data pipelines, and collaborate with product teams. The ideal candidate has over 5 years of backend engineering experience, strong systems thinking, and proficiency in modern technologies including Node.js and AWS. Benefits include medical insurance, flexible time off, and competitive salary.

Qualifications

• 5+ years of backend engineering experience across multiple parts of the stack.
• Strong systems thinking; experience designing for scale and data integrity.
• Comfortable with ambiguous problems and excited to collaborate.

Responsibilities

• Design and ship features for deep insight into LLM usage and performance.
• Build real-time data pipelines for AI usage data.
• Collaborate with product engineers to solve customer problems.

Skills

Backend engineering experience

Systems thinking

Modern backend technologies (Node.js, Go, Python)

Observability tooling experience

Clear communication skills

Tools

Node.js

Go

Python

Rust

Postgres

Redis

Terraform

Docker

AWS

Grafana

Prometheus

Datadog

Job description

Braintrust is the AI observability platform. By connecting evals and observability in one workflow, Braintrust gives builders the visibility to understand how AI behaves in production and the tools to improve it.

Teams at Notion, Stripe, Zapier, Vercel, and Ramp use Braintrust to compare models, test prompts, and catch regressions — turning production data into better AI with every release.

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:

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.

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

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.