Top Java Developer Jobs in Toronto

Participate in analysis, design, development, testing, and implementation of application systems. Provide user support, perform feasibility and risk assessments, recommend security and process improvements, coach junior analysts, and consult with stakeholders to deliver application solutions while ensuring regulatory and policy compliance.

Design, build, and own high-performance, low-latency Java services and RESTful APIs. Architect solutions with Spring/Spring Boot, ensure test automation and CI/CD, operate production systems, lead code reviews, and collaborate across teams to deliver reliable, scalable financial applications.

Build and maintain cloud-native services, APIs, and platform capabilities. Design, implement, test, and troubleshoot scalable SaaS/backend systems. Collaborate with product, UX, and engineering teams, participate in code reviews, agile delivery, and continuous learning.

The Senior Full Stack Developer will build features for a data security platform, focusing on microservices, code quality, and security best practices while leveraging AI tools for development efficiency.

Seeking a Senior Java Developer to engage in Agile Scrum processes, collaborate with teams, and develop solutions using Java and SQL. The role requires delivering quality software through effective communication and continuous learning.

Design, develop, and maintain Java/J2EE applications. Analyze existing programs, implement features using Servlets/JSP/JSF/Spring/EJB, build web services, perform unit/integration testing, optimize performance, manage CI environments, and provide development guidance.

Develop and maintain Java/J2EE applications and web services (REST/SOAP); work with Oracle/SQL Server databases; deploy on WebSphere; collaborate in an Agile team within banking/financial services; communicate with stakeholders.

Design, build, and optimize low-latency, high-throughput Java microservices and REST APIs for payments. Deploy and scale services on OpenShift/Kubernetes and AWS, integrate with MongoDB and other datastores, drive architecture and performance improvements, and mentor peers.

Develop and maintain secure, scalable Java backend applications and integrations. Design RESTful services, troubleshoot production issues, improve performance and reliability, apply secure coding practices, and collaborate with UI and business stakeholders. The role includes monitoring systems, conducting code reviews, supporting incident postmortems, and mentoring junior developers within an Agile engineering team. This is a hybrid position based in Etobicoke, Ontario, requiring two office days per week.

Develop and maintain Java/J2EE applications using JSP, Servlets, Struts2, Hibernate and WebSphere. Work with MySQL/Oracle and PL/SQL, apply MVC architectures and Java design patterns, collaborate in a team, solve problems, and deliver projects on time in a dynamic environment.

Develop and maintain Java applications and Oracle PL/SQL (Oracle 10/11/12). Build complex SQL queries, work with XML, messaging and Java web services, handle database interactions, debug and analyze issues. Recent hands-on experience in both Java and Oracle required.

Provide systems analysis and recommendations for web-enabled, relational database applications using J2EE and Oracle 10g. Develop and implement solutions with WebSphere, e-Forms, JavaScript, Hibernate, and JDBC. Apply structured development methodologies, CASE and project management tools. Perform data and process modeling, metadata/repository management, data dictionary tasks, and contribute to enterprise architecture deliverables.

Senior Java developer working on multi-tier J2EE applications with strong SQL/Oracle 11g skills. Requires WebSphere 7, Jython and KSH/Bash scripting, Linux experience (RHEL preferred), and experience with Mantas or equivalent FCCM systems. Responsible for system build documentation and documenting solution architectures in Visio/PowerPoint.

The Java Integration Developer will work in an Agile environment, focusing on team collaboration, task management, and software integration using Java and related technologies.

Design and develop complex, scalable applications in an Agile team. Collaborate on features, estimate tasks, and maintain clear code.

Design and develop scalable applications in an Agile team, collaborating closely on features while learning and applying new technologies.

Join a cross-functional Agile team to design and develop backend systems and REST APIs. Build low-latency, high-throughput services, apply Core Java, SQL, big-data tools, NoSQL stores, CI and automation testing, and collaborate on product roadmap and system improvements.

The role involves developing and maintaining web APIs and backend services using Java and Spring Boot, focusing on microservices and CI/CD in an agile environment.

The role involves designing, developing, and maintaining scalable backend services using Java and modern technologies, focusing on microservices architecture, TDD, and collaboration with teams.

Develop and maintain Finance Desk applications (position management, trade capture, risk processing). Own full SDLC: analysis, design, coding, testing, deployment, L3 production support. Improve CI/CD pipelines, collaborate with global teams, coordinate testing and rollouts, and drive secure, maintainable solutions.

Design, implement, and maintain Elasticsearch distributed-systems components to ensure scalable, performant, and resilient indexing, coordination, replication, and cluster communication. Diagnose and fix concurrency and performance issues, push scalability limits, and lead projects end-to-end while supporting support engineers and mentoring engineers across multi-node deployments.

Lead development of core Elasticsearch infrastructure and shared platform features. Design scalable APIs, solve performance and concurrency issues, improve observability and CI/CD, support cross-team projects, and own operational investigations end-to-end.

The Senior Java Developer will enhance Elasticsearch's distributed systems, maintain high performance, and solve complex problems related to data indexing and coordination across multiple machines.

Seeking a Senior Engineer with 5+ years in Java, familiar with Spring, microservices, and agile principles to solve client challenges.

Design, implement, and deploy Java/Spring Boot microservices and single-page applications for an event-driven deal management platform. Participate in coding, peer reviews, CI/CD, performance tuning (MongoDB), testing (TDD/BDD), troubleshooting, and lead agile delivery efforts with product and DevOps partners.