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Senior Software Engineer (Node), JavaScript SDK

Functional Software, Inc.

Job Overview

Location

Toronto, Ontario, Canada

Job Type

Full-time

Full Job Description

📋 Description

• As a Senior Software Engineer on the JavaScript SDK team at Sentry, you will help redefine the future of JavaScript development by building cutting-edge SDKs for Node.js, Bun, Deno, Cloudflare Workers, and other modern server runtimes, directly impacting millions of developers worldwide.
• You will have end-to-end ownership of features—from design and implementation to testing and documentation—while leveraging AI tools to enhance productivity and focusing on solving complex problems in developer tooling.
• You will collaborate with open-source communities including TC39, the Node.js core team, and OpenTelemetry SIG, contributing to standards and runtime interoperability while representing Sentry in influential technical forums.
• You will work in a hybrid model at Sentry’s Toronto hub with in-office anchor days on Mondays, Tuesdays, and Thursdays, engaging directly with users via GitHub and customer support to resolve critical bugs and gather real-world feedback.
• You will thrive in a collaborative, fast-paced environment where shipping high-quality, delightful code is celebrated, and you’ll contribute to a globally recognized open-source project used by companies like Disney, Microsoft, and Atlassian.

🎯 Requirements

• At least 5 years of experience as a Software Engineer, web developer, or 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
• Exceptional written and verbal communication skills in English
• Based in the Toronto, Canada area or willing to relocate to Toronto

🏖️ Benefits

• Participation in Sentry’s employee benefit plans including incentive compensation and equity grants
• Access to paid time off and group health insurance coverage
• Opportunity to work with cutting-edge technology in a hybrid model with in-office collaboration days
• Direct impact on widely used open-source tools and engagement with global developer communities
• Support for professional growth in a company invested in employee development

Skills & Technologies

JavaScript

TypeScript

Node.js

GitHub

Senior

Hybrid

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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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