Job Description
Weave is looking for a foundational Senior Backend Engineer - Performance to establish and lead our performance engineering practice. Weave recently acquired Truelark, and we are preparing to onboard a massive wave of new customers onto their platform. Your first mission will be to ensure the Truelark platform can scale flawlessly, directly safeguarding customer experience and revenue during a critical business transition. This is a high-stakes, high-impact challenge that requires immediate, expert-level engagement to define performance baselines, identify bottlenecks, and guarantee reliability under unprecedented load. Beyond this initial challenge, you will be the founding member of Weave's performance engineering discipline. Your long-term strategic mission is to tackle the complex, "third-order" performance issues that arise in our distributed microservices architecture—the subtle inflection points between services that are a leading cause of incidents. This involves moving beyond testing individual components to understanding and fortifying the systemic behavior of our entire platform. As a key member of the Test Infrastructure team, your mandate is not just to test, but to build. You will create the paved-road for performance testing at Weave, developing frameworks, tooling, and reference implementations that empower hundreds of engineers to "move fast without breaking things". This role requires a platform-oriented mindset, where the primary goal is to enable and multiply the efforts of others, embedding performance as a core component of the software development lifecycle at Weave. This is a unique opportunity to build a critical engineering function from the ground up, with the autonomy to select tools, define methodologies, and shape the future of reliability and performance at a rapidly growing public company. If you are a software engineer with a passion for performance, a talent for building developer-centric tools, and a drive to solve complex systems-
