Senior Java Developer
First seen by Alion on Oct 22, 2026.
Senior Java / Spring Boot Developer
Location: Greater Toronto Area (GTA), Hybrid, primarily remote with on-site presence as required
Language: English, strong written and verbal communication skills
Duration: 2-month contract, full-time
Compensation: $100$105/hour (Independent Contractor)
About the Opportunity
Are you a seasoned Java Developer who enjoys solving complex technical challenges and building scalable enterprise solutions? An established organization in the transportation and logistics sector is seeking a Senior Java / Spring Boot Developer to support a major application modernization initiative.
In this role, you'll help transform critical appointment management and operational workflows through modern backend services, APIs, and integrations. You'll collaborate with talented technical teams across multiple workstreams, delivering reliable solutions that support high-volume business operations.
What's In It for You
Competitive hourly compensation of $100$105.
Primarily remote work with occasional on-site collaboration in the GTA.
Opportunity to contribute to a high-impact enterprise modernization initiative.
Exposure to complex integrations, modern development practices, and collaborative Agile delivery teams.
Your Responsibilities
You'll design and develop scalable Java / Spring Boot services, RESTful APIs, and microservices supporting enterprise appointment management workflows.
You'll build backend functionality for booking, reservation validation, terminal selection, scheduling, and transaction processing.
You'll integrate internal and external enterprise systems while implementing business rules, security controls, exception handling, and data-access components.
You'll develop automated unit and integration tests, troubleshoot defects, and support system testing and deployment readiness.
You'll collaborate with frontend developers, architects, and integration teams to translate business requirements into technical solutions.
You'll contribute to code reviews, Agile ceremonies, technical documentation, CI/CD processes, and knowledge transfer.
Skills and Qualifications
7+ years of Java application development experience, including strong hands-on expertise with Spring Boot, Spring Framework, dependency injection, and enterprise modernization.
Proven experience designing RESTful APIs, microservices architectures, JSON payloads, validation logic, error handling, and internal/external system integrations.
Strong SQL and relational database skills, including database queries, data-access services, and high-volume transactional workflows.
Experience with automated unit and integration testing, Git-based source control, CI/CD pipelines, troubleshooting, and debugging.
Knowledge of application security, authentication, authorization, enterprise API security patterns, and established coding standards.
Familiarity with Azure DevOps, cloud-based delivery environments, and Agile/Scrum methodologies.
Experience in transportation, logistics, booking, reservations, or appointment management, with strong collaboration skills across distributed teams.
Why Partner with Altis
If youve never worked with a staffing agency before, we make it easy. We work with top employers across Canada who have great jobs to fill, each vetted and verified by our team. When you apply for a job with Altis, we get to know you as a candidate and learn what your strengths are. Then, if youre a solid match, we handle all the logistics, advocating for you as a candidate for the role, providing access to coaching and connecting you directly with the hiring manager. And rest assured, all our services are free of cost for candidates.
We appreciate the time and effort all applicants invest in their submissions. Please note that only candidates shortlisted for this role will be contacted directly. However, your profile will remain under consideration for future opportunities that align with your experience and career goals.All qualified applicants will receive fair consideration for employment. We welcome individuals of all backgrounds, experiences, and identities including those who identify as women, members of racialized groups, Indigenous Peoples, persons with disabilities, and 2SLGBTQIA+ communities. If you require an accommodation, please review our accessibility policy and reach out to our accessibility officer with any questions. Our human recruiters review all applications and always make the final hiring decision. On occasion, we also use AI-assisted tools to help review applications.