senior java backend developer jobs in Toronto

Own AWS-based backend architecture in Toronto with hands-on API development, system integrations, and secure application design. This hybrid contractor assignment requires two onsite days weekly. As a Senior Full Stack Developer, you will lead architecture and development for end-user self-service and access visibility solutions. You will develop APIs,...

Build high-performance Java and Rust trading software with State Street’s EFX Boston team as a senior full-stack developer. Solve complex problems across global platforms. This senior eFX developer creates new functionality alongside a global team delivering bespoke FX trading solutions. The work spans mesh-based service-oriented platforms across...

Lead Java development for enterprise web applications and platform services in Toronto, working fully onsite five days weekly throughout an 11-month contract. This Senior Software Developer role spans technical design, development, integration, and maintenance. You will build microservices, REST APIs, reusable platform components, and database solutions....

Design secure Java platforms onsite, spanning user interfaces, APIs, services, workflows, integrations, and data-access layers. Apply REST and microservices expertise. This senior full stack developer builds enterprise capabilities supporting multiple government programs. The work includes reusable platform services and connections for registries,...

Java and system design expertise define this hybrid Toronto contract for an expert-level developer supporting foreign exchange products and technology. TEKsystems seeks a developer with seven or more years of Java and technology experience. The work centers on core engineering, system design, Agile delivery, Java 8, and capital markets. Experience with...

Thomson Reuters in Toronto, Ontario is seeking a Senior Software Engineer with strong DevOps and cloud expertise to design, build, deploy and operate scalable cloud-native services. You will work with Java, Spring Boot, AWS, PostgreSQL, CI/CD and IaC across development to production, in a hybrid model with three days onsite per week. You will partner with...

About the Role We are seeking a highly skilled Senior Full Stack Developer (Angular & Java) to join our Digital Engineering team. In this role, you will design, develop, and support scalable enterprise applications while collaborating with cross-functional teams to deliver innovative technology solutions that drive business value. The ideal candidate will...

Lead Java and FHIR integration work as a Senior Full Stack Developer in a hybrid Toronto assignment requiring three onsite days weekly. This four-month contract focuses on FHIR Subscription and SubscriptionTopic integration. You will build Java, Node.js, React, and AWS services for clinical event processing. The work also includes SMART on FHIR and HL7 v2...

Lead Java and FHIR integration work as a Senior Full Stack Developer in a hybrid Toronto assignment requiring three onsite days weekly. This four-month contract focuses on FHIR Subscription and SubscriptionTopic integration. You will build Java, Node.js, React, and AWS services for clinical event processing. The work also includes SMART on FHIR and HL7 v2...

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...

Senior Full Stack Developer - Java and FHIROn behalf of our healthcare client, Procom is searching for a Senior Full Stack Developer - Java and FHIR for a 4-month role. This position is a hybrid position with 3 days onsite at our client’s Toronto office.Senior Full Stack Developer - Java and FHIR - Job Description:This role involves working on a critical...

About Fullscript We're an industry-leading health technology company on a mission to help people get better. We started in 2011 with one simple idea. Make it easier for practitioners to access the products they trust so they can deliver better care. That simple idea grew into a platform that powers every part of care. Today, more than 125,000 practitioners...

Java application development and testing define this full-time opportunity in Toronto. Apply Spring, Hibernate, and database expertise to large-scale systems. As an Associate Director or Lead Developer, you will design, code, test, and maintain Java-based applications. The work includes APIs, business logic, datasets, application analysis, and technology...

Konrad is a next generation digital consultancy in Toronto seeking a Full Stack Java Developer to work on web applications using Java and Spring Boot within a skilled team. You’ll contribute to consumer and enterprise apps and help deliver best-in-class digital products for global clients. You’ll write maintainable code, participate in reviews, explore...

Source Code in Toronto seeks a Sr. Software Developer for a 1-year contract, onsite at 222 Jarvis St. You will translate requirements into scalable, tested full-stack apps using Java with Spring Boot, JPA/Hibernate, React or Angular, and PostgreSQL. You will design, build and test data-driven backend services and RESTful APIs, lead technical discussions,...

Build Java applications and web interfaces as a Senior Full Stack Software Developer working in the office five days weekly. Apply 10+ years of development experience. This senior engineering position centers on technical delivery across Java, Angular, Oracle, and web UI development. The work includes Liberty, Spring, JAX-RS 2.0, JDBC 4.1, EWS API,...

RBC is seeking a Senior API Developer to build robust, scalable REST/GraphQL APIs for commercial clients. You will design, develop, and maintain APIs, collaborating with product, architecture, and infrastructure teams to ensure security, performance, and reliability. Ideal candidates have 5+ years of software development experience with at least 4 years in...

**Contract Duration:** Until October 1, 2027 We are seeking an experienced **Senior Software Developer** to join a large-scale enterprise application development project. The ideal candidate will have extensive hands-on Java development experience, strong knowledge of Oracle or SQL databases, RESTful web services, and microservices architecture. The...

Kumaran Systems is seeking an accomplished senior .NET backend engineer to design and implement scalable services in Azure. You will work on RESTful APIs, data modeling in SQL Server/Azure SQL, and secure authentication patterns while driving CI/CD through modern DevOps practices. Join a team that emphasizes engineering discipline, AI-enabled...

Build Java solutions for banking platform modernization, using backend or full-stack development and Angular experience where applicable. Support secure digital experiences through Agile delivery. This senior developer assignment supports a large-scale financial technology modernization initiative. You will develop, test, document, and support Java...