Application Developer, Java and Cloud

Req ID: 27978 Vacancy Type: Temporary (2-yr contract with full benefits) Number of Positions: 1 Closing Date: 10/16/2026 Job Summary The City of Mississauga is seeking an experienced Application Developer to support the modernization of the Property Tax Management system. The successful candidate will design, build, test, deploy, and support cloud-native web applications that replace legacy Oracle Forms and reports. We are looking for a pragmatic application developer who can translate complex taxation workflows, legacy PL/SQL logic, forms, and reports into maintainable digital products. The candidate should be comfortable working across frontends, backend, data, integration, security, and DevOps. You collaborate effectively with business analysts, architects, database specialists, security teams, infrastructure teams, vendors, and municipal partners, and you can balance modernization goals with business continuity and data integrity. The role operates in a hybrid work environment, with office presence required at Mississauga City Hall, 300 City Centre Drive, Mississauga. Duties and Responsibilities The Successful Candidate Will Develop accessible, responsive web interfaces using TypeScript and a modern frontend framework such as React or Angular. Develop and maintain Java services, APIs, business rules, integrations, and batch-processing components supporting property-tax workflows. Build reusable front-end components and RESTful APIs that follow API-first, modular and testable design principles. Develop containerized services on Amazon ECS and AWS Fargate, using Amazon S3 and DynamoDB for state management and asynchronous job processingDesign and implement RESTful APIs and reusable services that integrate frontend applications, workflow orchestration, databases, reporting components, and external systems. Implement asynchronous and scheduled processing for reports, calculations, file generation, data transformation, and other long-running jobs. Build batch, scheduled-report and event-driven workflows using AWS Step Functions and container-based job processing. Create and maintain automated unit, integration, API, end-to-end, regression, performance, and security tests. Participate in the progressive migration of forms and reports while supporting coexistence between the modern AWS platform and the legacy environment. Apply role-based access control using Azure AD federation, AWS Cognito, JWT claims, and application-level authorization. Contribute to DevOps CI/CD pipelines, including static application security testing (SAST), code coverage, and pull-request review workflows. Protect data and secrets through TLS, encryption at rest, least-privilege IAM roles, AWS KMS, and AWS Secrets Manager. Investigate and resolve application defects, failed workflows, performance issues, integration errors, and production incidents. Produce technical designs, interface specifications, data mappings, runbooks, deployment instructions, test evidence, and support documentation. Estimate development effort, identify delivery risks, and contribute to sprint planning, backlog refinement, release planning, and technical governance. Follow the City’s SDLC and AI-SDLC standards: author specifications and steering files, review all AI-generated output, and stay accountable for submitted code. Provide operational support, knowledge transfer, and continuous enhancement for TXM applications and services. Skills And Qualifications Post-secondary degree in Computer Science, Software Engineering, Information Technology, or a related discipline.Minimum 3-5 years of experience developing enterprise applications.Experience developing applications using Java and object-oriented programming principles.Experience with modern JavaScript/TypeScript development frameworks such as React, Angular, or Vue.Experience developing and integrating RESTful APIs and web services.Experience with AWS services like ECS Fargate, S3, Aurora DB, ALB, Cloudfront etc.Experience with relational databases and SQL preferably Postgre SQL.Experience with cloud-based application development (AWS preferred).Experience with source control, automated testing, and CI/CD practices.Knowledge of application security principles and secure coding practices.Strong analytical, problem-solving, and communication skills.Ability to work independently and collaboratively within a team environment. Hourly Rate/Salary: $ 49.16 - $ 65.54 Grade: TF Hours Of Work Work Location: Civic Centre Hybrid Workplace Organization Unit: CPS Department/Division/Section: CPS/Corporate Services Dept , CPS/IT Division , Enterprise Business Solutions Non-Union/Union: Non Union The City of Mississauga may use artificial intelligence (AI) technology in sourcing candidates for some positions, however, it is not being used for screening, assessing, or selecting candidates. Applicants applying to this posting may be considered for the same position(s) should another vacancy occur within six months from the date of this posting, unless the requirement to repost is expressed differently in a Collective Agreement. If you are selected for an interview and your proposed transfer or promotion results in a real or perceived conflict of interest in relation to the Employment of Relatives Corporate Policy and Procedure, you must notify the Human Resources Representative as soon as possible. If you are selected for an interview you are expected to disclose all current positions held in the City, whether full time or part time. Equity, Diversity and Inclusion The City of Mississauga is committed to creating a respectful and supportive workplace that fosters a culture of equity, diversity and inclusion which broadly reflects the communities and residents we serve. Throughout the employee life cycle, the City is working to include an EDI lens to attract, retain and support the growth of diverse talent. Learn more about the City’s commitment to Equity, Diversity and Inclusion . Accommodations The City of Mississauga is an Equal Opportunity Employer and is committed to removing barriers in our selection process for people with visible and invisible disabilities. In accordance with the Accessibility for Ontarians with Disabilities Act, 2005 and the Ontario Human Rights Code, the City of Mississauga will provide accommodations throughout the recruitment, selection and/or assessment process to applicants with disabilities. If selected to participate in the recruitment, selection and/or assessment process, please complete the following Accommodation Request Form and have it emailed to recruitment.accommodation@mississauga.ca citing the Job ID and Job Title. This will inform Human Resources of the nature of any accommodation(s) that you may require in respect of any materials or processes used to ensure your equal participation.