Our Federal Government client is seeking Senior Software Engineers to deliver secure, scalable applications across Java, .NET and modern integration platforms. You'll advance DevOps practices, optimise data models, and ensure robust system integration through RESTful APIs that support critical services. What you'll do Develop, maintain and enhance applications across Java (Spring MVC) , .NET (Entity Framework) and integration platforms ( Mulesoft/ESB ). Design and implement RESTful APIs and integration points that are secure, scalable and resilient. Implement CI/CD using tools such as Azure Pipelines and Jenkins . Analyse and optimise SQL and data models for performance, integrity and efficient access. Write unit tests and support test automation (e.g. Karate , Gatling ). Produce clear technical, specification and compliance documentation. Participate in agile ceremonies and collaborate closely in a complex technical environment—proactively communicating, asking clarifying questions and driving problem-solving. Essential criteria Multi-Stack Development Proficiency - Java (Spring MVC), .NET (Entity Framework), Mulesoft/ESB. API & Integration Design - robust, scalable, secure RESTful APIs and system integration. DevOps Implementation - CI/CD with Azure Pipelines, Jenkins. Data Modelling & SQL Optimisation - performance, integrity, efficient access. Testing & Automation - unit testing; contribution to automation with Karate, Gatling. Technical Documentation - clear, accurate, up-to-date artefacts. Desirable Experience with CRM platforms (especially Salesforce) . Exposure to digital transformation in complex, regulated environments. Frontend experience with React/Angular/Vue . Why Marvel Professional Services? We’re a Canberra-based SME trusted across Federal Government. Expect responsive engagement, transparent communication and the chance to do meaningful work within federal government environment. How to apply Apply with your CV today . Please email work@marvelprofessionals.com.au if you have any questions about the role. At Marvel Professional Services, we are dedicated to nurturing a diverse, equitable, and inclusive workplace. As advocates of Equal Opportunity Employment, we aim to cultivate a culture that values and empowers every employee, irrespective of their cultural heritage, age, gender identity, neurodiversity, disability, family responsibilities, religious beliefs, or sexual orientation. We encourage applications from veterans, individuals returning from career breaks, persons with disabilities, and those identifying as Aboriginal and Torres Strait Islander.
