Software Engineer - Developer Experience (Java)

Sinch is pioneering the way the world communicates. More than 150,000 businesses - including Google, Uber, PayPal, Visa, Tinder, and many others - rely on Sinch's Customer Communications Cloud to power engaging customer experiences through mobile messaging, voice, and email.

Whether you need to verify users or craft omnichannel campaigns, Sinch makes it easy. Our AI-infused Super Network, APIs, and applications ensure you can connect with your customers reliably and securely, at every step of their journey.

At Sinch we "Dream Big", "Win Together", "Keep it simple", and "Make it Happen". These values are our foundation!

About the role

As a Software Engineer in our Developer Experience (DX) organization, you will play a key role in how Sinch APIs are consumed across multiple programming languages.

Your primary focus will be the development and maintenance of Sinch's Java SDK, one of our most widely used SDKs. Through this work, you will gain deep familiarity with Sinch APIs, products, and developer expectations.

In addition, you will be a core contributor to our SDK generation tooling, which is used to generate Java, Node.js, Python, and .NET SDKs from OpenAPI specifications. In this role, you will help scale SDK development across languages by implementing shared generation logic, templates, and conventions that other members in the SDK team rely on.

This is a developer-facing platform role with strong impact across the entire DX organization.

This role is open to candidates based in Spain, from our offices in Madrid.

What you will do

As a Software Engineer, you will:

• Design, develop, and maintain Sinch's Java SDK, ensuring high quality, consistency, and usability.
• Translate OpenAPI specifications into idiomatic, well-designed Java APIs.
• Improve