Senior Full-Stack Engineer, Frontend Focus (Greenfield UI)

The Onset Group; Sydney; On-site; AUD 140,000 - 200,000; Full time

Job summary

The Onset Group in Sydney is seeking a Senior Fullstack Engineer (Frontend Leaning) to join a greenfield data platform project. You will design a data-rich web app and help activate customer audiences across digital channels.

Work on frontend-heavy features using React and TypeScript, build dashboards, and collaborate with backend services. This 6-month contract may extend, with opportunities to influence architecture and engineering standards across the stack.

Qualifications

• Strong commercial experience building complex applications with React and TypeScript.
• Solid full stack engineering experience, including backend development and API integration.
• Experience building greenfield products or owning major features from design through to delivery.
• Strong understanding of frontend architecture, component design, state management and application performance.
• Experience working with data-heavy applications, dashboards, workflow tools or complex business logic.
• Ability to make sound technical decisions and work through ambiguous requirements.
• Strong communication skills and the ability to work closely with technical and non-technical stakeholders.
• A hands-on engineering approach, regardless of seniority.

Responsibilities

• Designing and building a complex, data-rich web application using React and TypeScript.
• Developing interactive dashboards, audience management tools and advanced filtering interfaces.
• Building rule-based segmentation tools with nested conditions, dynamic filters and complex user interactions.
• Integrating frontend applications with backend services, APIs and data platforms.
• Contributing to technical architecture, application design and engineering decisions.
• Working with engineers and business stakeholders to turn complex requirements into practical solutions.
• Helping establish engineering standards, reusable components and maintainable application architecture.
• Taking ownership of features from initial design through to production.

Job description

The Onset Group in Sydney is seeking a Senior Fullstack Engineer (Frontend Leaning) to join a greenfield data platform project. You will design a data-rich web app and help activate customer audiences across digital channels.

Work on frontend-heavy features using React and TypeScript, build dashboards, and collaborate with backend services. This 6-month contract may extend, with opportunities to influence architecture and engineering standards across the stack.