
As a Senior Software Engineer on the Developer Experience (DX) Tooling team, you will design and build developer-facing tools, work on CLI tools, SDKs, APIs, and internal frameworks, and collaborate with a global developer community. You will have strong professional experience with PHP and Golang, ideally in a Symfony-based ecosystem, and enjoy building developer tooling such as CLIs, SDKs, or APIs. You will design clean, stable public APIs and care about long-term compatibility. You are familiar with Composer, dependency management, and PHP packaging to build developer tooling and libraries that integrate seamlessly into existing workflows. You bring an open-source mindset and enjoy collaborating in public repositories. You work smoothly in agile, cross-functional teams, communicate clearly with external developers and internal stakeholders, and take ownership to deliver with minimal supervision. Excellent English communication, written and spoken, enables you to work effectively across teams and time zones. German is a plus, not a requirement.