Senior Developer

Coates; Sydney; On-site; AUD 140,000 - 170,000; Full time

Job summary

Coates is seeking a Senior Developer in Sydney to lead design, development, and enhancement of scalable software across our digital ecosystem. You will drive end-to-end lifecycle, mentor developers, and shape technical direction across platforms.

You will collaborate with stakeholders to translate requirements into robust solutions, optimize performance, and ensure secure practices while embracing new technologies and standards.

Qualifications

• 5–7+ years’ experience in software development.
• Strong expertise in C# .NET, React.js, Vue.js, and SQL.
• Experience designing scalable architectures and applying design patterns.
• Proven ability to optimise performance and resolve complex technical issues.
• Hands-on with CI/CD pipelines and web security best practices.

Responsibilities

• Lead design, development, and maintenance of scalable, secure applications and integrations.
• Drive full lifecycle delivery from ideation to deployment and continuous improvement.
• Collaborate with stakeholders to translate business requirements into technical solutions.
• Troubleshoot and resolve complex full-stack issues.
• Champion code quality through reviews, testing, and CI/CD practices.
• Optimise application performance and identify bottlenecks.
• Ensure security best practices are embedded and vulnerabilities addressed.
• Introduce and embed new technologies, frameworks, and engineering standards.
• Mentor developers and foster a high-performing, collaborative team environment.
• Support production teams to resolve issues and improve user experience.

Skills

C# .NET

React.js

Vue.js

SQL

Design patterns

Education

Bachelor's degree in IT/CS

Tools

Azure

Job description

About The Role

We’re looking for a Senior Developer to lead the design, development and enhancement of high-quality, scalable software solutions across our digital ecosystem.

In this role, you’ll drive the end-to-end software development lifecycle, from concept to deployment, while working closely with business stakeholders, architects, and cross-functional teams. You’ll play a key role in shaping technical direction, mentoring developers, and ensuring delivery excellence across our platforms.

What You’ll Be Doing

• Lead design, development, and maintenance of scalable, secure applications and integrations
• Drive full lifecycle delivery—from ideation through to deployment and continuous improvement
• Collaborate with stakeholders to translate business requirements into technical solutions
• Troubleshoot and resolve complex full-stack issues
• Champion code quality through reviews, testing, and CI/CD practices
• Optimise application performance and identify bottlenecks
• Ensure security best practices are embedded and vulnerabilities addressed
• Introduce and embed new technologies, frameworks, and engineering standards
• Mentor developers and foster a high-performing, collaborative team environment
• Support production teams to resolve issues and improve user experience

What You’ll Bring

• 5–7+ years’ experience in software development
• Strong expertise in C# .NET, React.js, Vue.js, and SQL
• Experience designing scalable architectures and applying design patterns
• Proven ability to optimise performance and resolve complex technical issues
• Solid understanding of web security best practices
• Hands‑on experience with CI/CD pipelines
• Exposure to Azure (PaaS preferred)
• Strong data modelling and SQL optimisation skills
• Demonstrated experience leading development from concept to production
• Exceptional communication skills across technical and business stakeholders
• Passion for mentoring and developing others

Qualifications

• Tertiary qualification in IT, Computer Science, or related field
• Microsoft Azure certifications (highly regarded)

Diversity and inclusion are at the heart of our culture. Coates welcomes candidates from all backgrounds, experiences and perspectives to apply.

Coates. Equipped for you.