Senior Full-Stack Engineer

The Senior Full-Stack Engineer designs, develops, tests, implements and supports scalable software applications and systems across the Flexischools platform. This role has a strong backend engineering focus, working primarily with C#, .NET, ASP.NET Core, AWS and distributed services, while also contributing to customer-facing applications using ReactJS and TypeScript. The engineer designs maintainable services and APIs, applies strong software architecture and Domain-Driven Design principles, and contributes across the full software development lifecycle from requirements analysis and design through to production support. As a senior engineer, the role also influences technical direction within the squad, contributes to engineering standards, and supports the growth of other engineers through collaboration, mentoring and code reviews.

Key responsibilities

• Deliver high-quality software aligned with product priorities, architectural direction and engineering standards
• Research, analyse and evaluate system and program requirements to inform software design and effective technical solutions
• Design, develop, modify, test, implement and maintain backend services, APIs, integrations and supporting web applications
• Contribute to technical design and architecture, with a focus on maintainability, scalability, reliability and clear domain boundaries
• Work closely with Product, Engineering and other stakeholders to translate business requirements into effective technical solutions
• Apply appropriate automated testing, observability, security and quality practices throughout the development lifecycle
• Own software through to production, including deployment, monitoring, troubleshooting and incident resolution
• Write, update and maintain technical documentation, engineering standards and records of significant design decisions
• Mentor engineers, provide constructive technical feedback and contribute to a strong engineering culture
• Identify and mitigate risks affecting software performance, reliability and security

About you

• Tertiary qualification in Software Engineering, Computer Science or a related field, or equivalent commercial experience (typically 5+ years)
• Strong commercial experience with C# and modern .NET
• Strong experience building APIs and backend applications using ASP.NET Core
• Strong understanding of object-oriented design, SOLID principles, dependency injection and automated testing
• Experience applying architectural patterns such as Onion Architecture, Clean Architecture or similar layered approaches
• Practical experience with Domain-Driven Design concepts, including domain modelling, bounded contexts, aggregates, and separation of domain and infrastructure concerns
• Strong experience designing and developing REST APIs and service integrations
• Experience with Entity Framework Core and relational databases such as SQL Server or PostgreSQL
• Strong understanding of distributed systems and microservice architectures
• Experience building and operating applications in AWS