--- title: 'Software Engineer, SDK at Braintrust' canonical: 'https://feeny.ai/job/software-engineer-sdk-braintrust-remote-ebf4f2c5cvva' type: 'job' last_seen: '2026-10-17' --- # Software Engineer, SDK at Braintrust - **Company:** Braintrust - **Location:** Remote - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-10-08 - **Last confirmed live:** 2026-10-17 - **Apply:** https://jobs.ashbyhq.com/braintrust/2a6c4ee9-063f-45d4-83ba-faf64b1f1a60 ## Job description ## About the company Braintrust is the agent observability platform. By actively applying intelligence to agent traces and automatically surfacing the most critical patterns, Braintrust gives teams the visibility to understand how agents behave in production and the tools to improve them. Teams at Notion, Stripe, Box, OpenAI, and Cloudflare use Braintrust to trace their agents, find the issues in their observability data, and run evals that tell them how to improve. ## About the Role We’re hiring engineers to build the open-source libraries that customers use to observe, understand, and optimize how AI operates inside their production applications. These SDKs are a critical part of Braintrust’s platform. They power evaluation and observability pipelines across a wide range of environments, frameworks, and AI providers. This role is ideal for engineers who are passionate about developer experience, API craftsmanship, and building fast, reliable, and idiomatic libraries. You’ll own the full SDK lifecycle: design, implementation, release, documentation, and community support. Your work will be embedded in thousands of applications and help define how AI is adopted and operationalized across industries. ## What You’ll Do - Build elegant, idiomatic, and resilient SDKs that power Braintrust’s LLM evaluation and AI observability platform. - Ensure our libraries are easy to use, efficient to run, and a delight to work with, prioritizing developer experience and performance. - Integrate with major AI providers, frameworks, and platforms our customers rely on, such as OpenAI, Anthropic, and Gemini. - Build tools and automation to improve testing, profiling and simplify release workflows. - Collaborate closely with backend, platform, and product teams to ensure a cohesive and polished developer experience. - Be a great community ambassador: talk with our users, understand their issues, help them get their fixes merged and have deep empathy for our users. You Might Be a Fit If You: - Are customer-obsessed and passionate about solving real-world problems for developers. - Have deep expertise in either Javascript, Python, or Go, and understand what it takes to build fast, idiomatic, and reliable libraries in that ecosystem. - Are proficient with the tooling needed to build robust SDKs, such as testing frameworks, profilers, CI/CD pipelines, and packaging systems. - Care deeply about developer experience, from clean APIs and clear docs to thoughtful error handling and backward compatibility. - Know how to wrap, patch, or extend existing frameworks and SDKs to inject observability and control without breaking developer workflows. - Have experience maintaining or contributing to production-grade open-source libraries, ideally used across multiple environments. - Bonus: You’ve contributed to popular open source projects, led SDK adoption at your organization, are familiar with tracing and observability tools like OpenTelemetry, or worked on tools in the LLM/AI ecosystem. ## Benefits include - Medical, dental, and vision insurance - Daily lunch, snacks, and beverages - Flexible time off - Competitive salary and equity - Wifi & cellphone 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. ## About Braintrust ## Company Overview - **One-liner**: Braintrust provides an enterprise-grade AI observability and evaluation platform that helps teams measure, evaluate, and improve AI products in production. - **Entity Type**: Private (Series B) - **Headquarters**: San Francisco, California, United States - **Founded**: 2023 - **Founders**: Ankur Goyal ## Core Business - **Primary Industry**: AI Observability & Evaluation / Software Development - **Target Customers**: B2B, primarily engineering and product teams at enterprises and digital-native companies building AI-powered products. - **Mission/Purpose**: To empower developers and product managers to ship quality AI products that work, by taking the uncertainty and tedium out of incorporating AI into businesses. ## Products & Services - **Braintrust Platform (AI Observability)**: A SaaS platform for tracing, logging, monitoring, and analyzing AI application behavior in production. It captures every trace, tool call, and log, and provides real-time dashboards for latency, cost, and quality. - **Evals (Evaluation Framework)**: A tool for running experiments against real datasets, comparing prompts and models side-by-side, and scoring outputs using LLMs, code, or human review. It helps catch regressions and block bad releases before they hit production. - **Brainstore (AI-Native Database)**: A proprietary database designed specifically for storing and querying complex, nested AI traces at scale. - **Loop Agent**: An AI agent that helps improve AI by automatically generating better prompts, scorers, and datasets based on user-defined optimization goals. - **MCP Server**: Allows coding agents to query logs, run evals, and update prompts directly from an IDE. ## Market Standing - **Valuation/Market Cap**: Not publicly disclosed - **Key Metric (Funding)**: **$121.1 million** in total funding. - **Series B (Feb 2026)**: $80M led by ICONIQ Capital. - **Series A (Oct 2024)**: $36M with 12 investors. - **Seed Round (Dec 2023)**: $5.1M led by Greylock. - **Notable Investors/Partners**: Greylock, ICONIQ Capital. - **Growth Signals**: - **Headcount growth**: Exploded **+416.1% year-over-year** (from ~7 to 136 employees). - **Customer base**: Used by teams at high-profile companies including Notion, Stripe, Zapier, Vercel, and Ramp. - **Active hiring**: 63 active job postings, with a +215% yearly increase in job postings. - **Global presence**: Operating in 7 countries (US, UK, Canada, Germany, France, Austria, South Africa). ## Competitive Advantages - **Unified Workflow**: Connects evals and observability into a single, seamless workflow, bridging the gap between development and production monitoring. - **Purpose-Built Infrastructure**: Developed Brainstore, a database built from the ground up for the unique scale and complexity of AI traces, giving it a performance edge over traditional databases. - **Framework Agnostic**: Works with any stack (Python, TypeScript, Go, Ruby, C#) with no vendor lock-in, making it easy to adopt. - **Enterprise-Grade Security & Compliance**: SOC 2 Type II certified, GDPR compliant, and HIPAA compliant, with SSO, RBAC, and hybrid deployment options. - **Strong Talent Pool**: Employees are sourced from top-tier tech companies like Grafana Labs, MongoDB, HashiCorp, Figma, and Databricks, indicating a high-caliber team. ## Strategic Focus - **Scaling the Go-To-Market**: With a Series B led by ICONIQ Capital, Braintrust is likely focused on scaling its sales and customer success teams to capture a larger share of the enterprise AI market. - **Product Expansion**: The launch of the Loop Agent and MCP server indicates a focus on automation and developer experience, aiming to reduce manual work for AI teams. - **International Growth**: Expanding its presence in Europe and other key markets. ## Why Work Here - **High Growth Environment**: The company is in a hyper-growth phase (+416% headcount growth), offering significant opportunities for career advancement, ownership, and impact. - **Cutting-Edge Domain**: Working on a critical problem for the AI industry—observability and reliability—which is a high-priority area for many companies. - **Strong Engineering Culture**: The company is heavily technical (36% of staff in technical roles). The leadership includes a founder (Ankur Goyal) and a VP, Field CTO (Ameya Bhatawdekar), suggesting a deep technical focus. - **Culture Highlights**: The company seeks "highly independent, self-motivated, and creative people," suggesting a culture of autonomy and innovation. - **Work Policy**: Roles are listed for San Francisco, New York City, and Remote, indicating a flexible, hybrid-friendly approach. - **Notable Perks**: The company invests heavily in its security and compliance infrastructure (SOC 2, HIPAA, GDPR), which is a strong signal for employees who value building robust, enterprise-grade systems. ## Sources 1. [braintrust.dev](https://www.braintrust.dev/) 2. [braintrust.dev/careers](https://www.braintrust.dev/careers) 3. [linkedin.com/company/braintrust-data](https://www.linkedin.com/company/braintrust-data) 4. [jobs.ashbyhq.com/Braintrust](https://jobs.ashbyhq.com/Braintrust/) 5. 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