Senior Software Engineer (Node), JavaScript SDK

Functional Software, Inc.

Job Overview

Location

San Francisco, California

Job Type

Full-time

Full Job Description

📋 Description

• Lead the development and evolution of Sentry’s JavaScript SDKs across modern server-side and edge runtimes including Node.js, Bun, Deno, and Cloudflare Workers, ensuring robustness, performance, and compatibility across diverse execution environments.
• Take end-to-end ownership of feature development, from initial design and implementation through testing, documentation, and deployment, ensuring high-quality outcomes that meet both internal standards and external developer expectations.
• Build and maintain open-source JavaScript libraries that are consumed by millions of developers globally, with a focus on clarity, reliability, and ease of integration into existing applications.
• Leverage AI tools to enhance developer productivity, automating routine tasks while focusing engineering effort on solving complex problems in error tracking, performance monitoring, and runtime instrumentation.
• Collaborate directly with the Customer Operations team to investigate and resolve critical production bugs reported by users, ensuring rapid response and high customer satisfaction.
• Represent Sentry in the broader JavaScript ecosystem by participating in open-source communities including TC39, the Node.js core team, and the OpenTelemetry SIG, contributing to standards that shape the future of server-side JavaScript.
• Engage with the developer community on GitHub and at industry conferences, gathering feedback, answering technical questions, and promoting best practices for using Sentry’s SDKs in real-world applications.
• Design and implement instrumentation for server-side and edge environments that capture meaningful performance and error data without impacting application performance or developer experience.
• Write comprehensive, developer-friendly documentation that explains SDK usage, configuration options, migration paths, and troubleshooting techniques for both novice and advanced users.
• Advocate for and implement improvements to module system compatibility, runtime-specific APIs, and deployment models across Node.js, Bun, Deno, and Cloudflare Workers, addressing differences in module resolution, global objects, and async handling.
• Drive innovation in developer tooling by identifying gaps in the JavaScript ecosystem and proposing or building solutions that improve observability, debugging, and error reporting for modern serverless and edge applications.
• Maintain a strong commitment to code quality through rigorous unit and integration testing, automated CI/CD pipelines, and peer code reviews that uphold the high standards of a globally trusted developer platform.
• Work in a collaborative, fast-paced environment where shipping high-impact code is prioritized, and technical debt is actively addressed to ensure long-term maintainability and scalability of the SDK suite.
• Contribute to the strategic direction of the JavaScript SDK team by participating in roadmap planning, technical decision-making, and prioritization of features based on user needs and ecosystem trends.

🎯 Requirements

• At least 5 years of experience as a Software Engineer, web developer, or a similar role
• Deep expertise in developing web applications, libraries, or SDKs using TypeScript/JavaScript
• Hands-on experience with Node.js and meaningful exposure to one or more modern server runtimes such as Bun, Deno, or Cloudflare Workers — with a solid understanding of how they differ in module systems, APIs, performance characteristics, and deployment models
• Exceptional written and verbal communication skills in English
• You're based in San Francisco (Bay Area) or are excited about the prospect of relocating to this thriving tech hub

🏖️ Benefits

• Base salary range of $190,000 to $280,000
• Eligibility for incentive compensation and equity grants
• Paid time off and group health insurance coverage
• Participation in Sentry’s employee benefit plans and programs (including those detailed at sentry.io/careers)
• Opportunity to contribute to and shape open-source standards through engagement with TC39, Node.js core team, and OpenTelemetry SIG
• Work on a globally recognized open-source project used by 100,000+ organizations

Skills & Technologies

JavaScript

TypeScript

Node.js

GitHub

Senior

Onsite

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Functional Software, Inc.

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About Functional Software, Inc.

Functional Software, Inc. operates the Sentry platform, providing real-time application performance and error monitoring for developers. It tracks crashes, performance bottlenecks, and releases across web, mobile, and server applications, offering stack traces, release health, and alerting to speed debugging. Supporting languages like JavaScript, Python, and Go, it integrates with GitHub, Slack, and major DevOps tools. The company distributes its service as both SaaS and self-hosted open-source software, helping engineering teams improve code quality and user experience.

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