Top Java Developer Jobs in Toronto

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Lead hands-on development of high-scale Java/Spring Boot microservices and REST APIs, mentor engineers, drive architecture and CI/CD cloud deployments, build responsive front-ends, and integrate AI/LLM tools to accelerate development and enhance application capabilities.

The Senior Java Developer will lead software development for the Operations Workbench platform, focusing on coding, best practices, and collaboration within an Agile team.

Lead development of internal tools and platforms that improve engineering productivity and developer experience. Design, build, deploy, and optimize scalable web applications and cloud services using Java, Spring, Angular, React, and OpenShift. Collaborate with stakeholders, implement microservices and REST solutions, establish automated testing and deployment practices, and provide technical leadership for platform improvements. The role also involves monitoring, debugging, tuning, and maintaining highly reliable enterprise applications.

Lead application systems analysis and programming efforts, design and implement application changes, resolve complex business and system issues, coach mid-level developers, manage projects, define coding/testing standards, and ensure solutions align with architecture, compliance, and risk controls.

Design, develop, and maintain low-latency front-office eTrading applications. Collaborate with traders, sales, and quants, drive engineering standards, optimize performance and scalability, enhance automated testing and CI/CD, and provide onsite support to Rates traders in Paris.

Design, develop, and implement enterprise Java applications. Perform systems analysis, feasibility, estimates, SDLC oversight, testing, deployment, and post-implementation support. Use cloud-native technologies (Kubernetes, Docker), event-driven architecture (Kafka), RDBMS, API development, and application security. Mentor junior analysts, collaborate with stakeholders, enforce standards and compliance, and drive DevOps/CI-CD practices.

The Lead Java Developer will design, build, and support web applications, focusing on both front-end and back-end development using Java, Spring Boot, Angular, and microservices architecture.

Senior Java Full Stack Developer responsible for designing, building, testing, and supporting scalable Java/Spring Boot microservices and React front-ends. Deliver secure, maintainable solutions, participate in code reviews, production support, and continuous improvement while collaborating with business and technology partners.

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.

Design, build, and own high-performance Java services for low-latency, high-volume financial systems. Architect RESTful APIs with Spring/Spring Boot, implement test automation and CI/CD, operate production systems, perform code reviews, and collaborate cross-functionally to deliver scalable, reliable cloud-native applications using Kubernetes/OpenShift and messaging systems like MQ/Kafka.

Lead a squad as the technical lead for a Broker Experience Ecosystem: design scalable microservice solutions, own production stability, mentor developers, drive features from PI planning to production, and contribute to engineering culture using Java/Angular stack and modern CI/CD/container tooling.

Design, build, and maintain scalable cloud-native services, APIs, and platform components. Contribute to architecture, CI/CD, observability, and operational support. Mentor junior engineers, collaborate with product and UX, and help evolve AI-powered and SaaS platform capabilities to enable cross-product automation and developer productivity.

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.

Participate in analysis, design, development, testing, implementation and support of application systems. Provide feasibility studies, estimates, risk assessment, security recommendations, and act as SME/coach. Monitor development lifecycle, consult with users and tech teams, and ensure compliance with policies and controls.

The Senior Java Developer will lead design and delivery of systems, mentor engineers, and ensure scalable architecture using cloud-native technologies.

Senior Java developer responsible for full lifecycle development, enhancement, and production support of a global equities cash order management platform. Work with trading desks and cross-functional teams to design scalable microservices, improve performance, implement automated integration tests, remediate security/vulnerability issues, and adopt AI toolkits. Mentor mid-level developers and provide second-line and out-of-hours support.

Lead design and development of high-performance, low-latency trading and financial systems using Core Java and Spring. Implement multi-threaded, concurrent, and scalable solutions, tune SQL and caching (MemSQL/Redis), deploy and manage cloud applications (AWS/Azure), collaborate with global teams, perform code reviews, support live trading systems, and drive architecture for distributed capital markets solutions.

Senior individual-contributor responsible for designing, building, and delivering Java backend services (Spring Boot, Hibernate, multithreading, Oracle) for credit risk systems. Sets engineering standards, performs code reviews, mentors developers, architects scalable solutions, collaborates with business and tech teams, and ensures regulatory and data-protection requirements are met.

The Senior Java Engineer will design and develop middleware services, ensure project delivery, analyze systems for performance, and contribute to code reviews while adhering to engineering standards.

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.

The role involves developing applications, conducting feasibility studies, providing user support, risk assessment, and following agile methodology. Requires Java expertise and managing projects.

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.

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.