Senior Fullstack Developer

Introduction:

Why Blueberry?

At Blueberry, we’re building more than just trading platforms, we’re engineering seamless, high-performance systems that empower clients worldwide. Our tech team thrives on collaboration, ownership, and innovation, always aiming for clean code, fast delivery, and measurable impact.

As a Senior Full Stack Developer, you’ll work across the stack, from complex backend integrations to slick, high-performing frontends, building distributed solutions that fuel business growth and elevate the customer experience.

Description:

We’re looking for an experienced, hands-on developer with strong problem-solving skills, a passion for scalable design, and an eye for quality. You’ll take the lead on building, maintaining, and optimising systems that keep our platforms running at their best, with the freedom to explore new technologies and drive innovation.

Note: At Blueberry, moving with purpose means showing up, connecting, and building momentum together. This role is based onsite in Sydney, Monday to Friday, where the real magic happens.

How You’ll Make An Impact

• Build, maintain, and optimise scalable backend and frontend systems
• Transform designs and specifications into high-quality, tested code
• Integrate with third-party APIs, especially REST-based services
• Create and maintain thorough documentation for easy collaboration
• Troubleshoot and resolve production issues promptly
• Work with C# .NET, React.js, Next.js, and cloud CI/CD pipelines
• Share knowledge and mentor other team members
• Deliver on time and maintain high development standards
  
  
  

Skills and Experiences:

Who We’re Hoping To Find

• 6+ years backend development with C# .NET
• 5+ years integrating 3rd-party APIs (REST)
• 4+ years with React.js, Next.js, and Typescript
• Skilled in testing (unit/integration) and CI/CD (AWS/Azure)
• Excellent problem-solving, communication, and collaboration skills
• Able to thrive in a fast-paced, highly collaborative environment
  
  
  

Extra points if you have

• Experience building payment orchestration or treasury systems
• Experience building or modifying systems to be PCI DSS compliant
• Experience working with real-time data streams
• Experience in Financial Services, Banking, or Trading
• AWS expertise (Lambda, EC2, S3)
• Mobile development with React Native