Senior Software Engineer – Fullstack

Job Description

At Zendesk, we’re driven by a simple but powerful mission: to make customer experiences effortless. Our products empower thousands of businesses around the world to build deeper relationships with their customers through fast, reliable and beautifully simple support experiences.

Now, we’re taking that mission to the next level with Action Builder, our cutting-edge low-code/no-code automation platform. Action Builder enables teams to design powerful workflows without writing a single line of code, seamlessly connecting apps, data, and AI-powered agents to automate tasks and streamline operations at scale. It’s the foundation of our next-generation iPaaS offering and plays a critical role in shaping the future of customer support automation.

The Role

We’re looking for a Senior Fullstack Engineer to join our growing engineering team and help drive the evolution of Action Builder. You’ll build end-to-end product capabilities—from backend services and APIs to the frontend experience that makes complex automation feel simple.

You’ll work in a cross-functional squad alongside frontend and backend engineers, designers, and product managers to deliver powerful, scalable features used by thousands of businesses and millions of end users globally.

What You’ll Do Everyday

• Build end-to-end features across the stack using TypeScript, React, and Node.js, with backend services in Go and/or Java.
• Design and evolve backend APIs and integration boundaries (REST/GraphQL), collaborating closely with platform and partner teams.
• Own key architectural decisions across both frontend and backend—balancing usability, performance, scalability, and maintainability.
• Deliver polished, user-centric experiences that simplify complex automation and workflow logic.
• Develop and maintain systems that support workflow execution, reliability, observability, and safe iteration at scale.
• Champion engineering excellence: performance, accessibility, testing strategy, and operational readiness.
• Mentor teammates, contribute to squad rituals, and help raise the bar on full-stack practices.

What You Bring

• 5+ years of experience building modern software products, with meaningful experience across frontend and backend.
• Strong proficiency with JavaScript/TypeScript, including building scalable React applications (or similar frameworks).
• Experience building backend services and APIs using Node.js and/or Go and/or Java, including API design and data modeling.
• Familiarity with GraphQL and/or REST, and collaboration on API contracts, versioning, and integration patterns.
• Solid understanding of system design fundamentals: reliability, performance, observability, and secure-by-default development.
• A strong product mindset, you care deeply about user experience and delivering customer value.
• Excellent communication skills and a collaborative, team-first approach.

Bonus

• Experience with integration platforms, workflow engines, automation tools, or low-code/no-code environments.
• Experience with distributed systems, event-driven architectures, or building extensible “platform-like” products.

Why You’ll Love Zendesk

• A mission-driven company building impactful customer service products
• A vibrant, inclusive culture with a strong engineering community in Melbourne
• Flexible hybrid/remote work arrangements from our Melbourne hub
• Support for learning and development, including career growth paths and educational budgets
• Competitive compensation, benefits and generous leave policies

Apply Now

Join us to help build the future of business automation with Action Builder where low-code meets AI to power the next wave of customer experience innovation.

The Intelligent Heart Of Customer Experience

Zendesk software was built to bring a sense of calm to the chaotic world of customer service. Today we power billions of conversations with brands you know and love.

Zendesk believes in offering our people a fulfilling and inclusive experience. Our hybrid way of working, enables us to purposefully come together in person, at one of our many Zendesk offices around the world, to connect, collaborate and learn whilst also giving our people the flexibility to work remotely for part of the week.

As part of our commitment to fairness and transparency, we inform all applicants that artificial intelligence (AI) or automated decision systems may be used to screen or evaluate applications for this position, in accordance with Company guidelines and applicable law.

Zendesk is an equal opportunity employer, and we’re proud of our ongoing efforts to foster global diversity, equity, & inclusion in the workplace. Individuals seeking employment and employees at Zendesk are considered without regard to race, color, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, ancestry, disability, military or veteran status, or any other characteristic protected by applicable law. We are an AA/EEO/Veterans/Disabled employer. If you are based in the United States and would like more information about your EEO rights under the law, please click here.

Zendesk endeavors to make reasonable accommodations for applicants with disabilities and disabled veterans pursuant to applicable federal and state law. If you are an individual with a disability and require a reasonable accommodation to submit this application, complete any pre-employment testing, or otherwise participate in the employee selection process, please send an e-mail to peopleandplaces@zendesk.com with your specific accommodation request.