Senior Software Engineer, Open Source Nexus SDK

As a Senior Software Engineer, Open Source Nexus SDK, you will build and evolve the Nexus interfaces for the Temporal SDKs (which are client runtimes) — the primary way developers interact with Temporal. Nexus is Temporal’s durable execution framework for orchestrating work across team and application boundaries—providing improved modularity, security, debuggability, and fault isolation. Building Nexus into each SDK is a deep engineering challenge: these are not thin clients, they are full-fledged runtime environments that execute user workflows, manage durable state transitions, and coordinate closely with the Temporal Server. You will design and implement Nexus APIs and runtime behaviors across multiple languages, ensuring developers can easily compose, invoke, and integrate durable workflows using clear, idiomatic interfaces. Today Nexus support exists in Go and Java, and we are expanding into Python, TypeScript, and .NET. This role will be central in delivering new Nexus-powered features such as advanced durable execution patterns, async processing, and support for invoking workflows via industry-standard protocols. Most of this work is open source—explore it at https://github.com/temporalio —and you’ll collaborate closely with other SDK engineers to deliver a unified, delightful experience for our polyglot developer community.