senior java backend developer jobs in Toronto

Modernize business-critical Java platforms and help shape the next generation of financial markets technology. The Role Capco is looking for a Senior Java Developer to join a major technology modernization initiative focused on upgrading business-critical legacy applications and their supporting technology. This is a hands-on back-end engineering role for...

# Senior Java Python Developer (CMOD)CGI · Toronto, Ontario, CABack to resultsSenior Java Python Developer (CMOD)CGIToronto, Ontario, CA Posted October 21, 2026 Via Leading Talent### Full Job DescriptionCGI Canada Career – Java DeveloperBy playing this video you consent to Google/YouTube processing your data and using cookies – Learn more.Position...

Senior Java Developer (with LLM expertise) Full-time Miratech helps visionaries change the world. We are a global IT services and consulting company that brings together enterprise and start-up innovation. Today, we support digital transformation for some of the world's largest enterprises. By partnering with both large and small players, we stay at the...

Senior Java Full Stack Developer sought for five days onsite in Toronto, building secure enterprise applications with REST APIs and microservices.Working with the Government Services Integration Cluster, this senior developer designs and maintains platform capabilities across frontend, backend, API, workflow, integration, and data-access layers. The...

Design scalable Java and Spring Boot services from the Greater Toronto Area, working primarily remotely with on-site collaboration as required. Build backend solutions for complex enterprise workflows.This full-time, two-month contract supports an application modernization initiative in transportation and logistics. As a Senior Java Developer, you will...

Build tested Java applications as a Senior Software Developer, using Spring Boot, REST APIs, and full stack development expertise.This senior developer translates technical specifications into working applications through analysis, design, coding, compilation, maintenance, and unit testing. The work includes troubleshooting software packages, supporting...

Build Java applications with Spring Boot and AWS while supporting Nasdaq’s securities technology through a Wednesday-to-Sunday hybrid schedule. Deliver cloud-ready software across office and remote coverage.As a Software Developer, you will create professional web-based and back-end server applications for demanding financial securities customers. The work...

Job TitleSenior Full Stack Developer – JavaLocationToronto, ON (4 days on-site)Experience Level7+ YearsEmployment TypeFull-TimeAbout the RoleWe are seeking a highly skilled Senior Full Stack Developer with strong expertise in both front-end and back-end Java development. You’ll be part of a global team (Toronto, New York, London) working on...

Advance your career in Toronto with a full-time opportunity as a Senior Java Developer specializing in API and MQ related to Capital Markets. Your expertise will shape the future of trading applications. This position requires a minimum of 8 years of hands-on experience, particularly in Java API, MQ, and adapter technologies using Oracle databases....

Build scalable Java applications at Propel in hybrid Toronto, applying Spring Boot and REST expertise to fintech software development. Full-time technology work.As a Senior Software Developer, you will create reliable applications for Propel’s AI-driven fintech platform. The work emphasizes Java, object-oriented programming, clean code, and software...

Senior Java application development expertise is needed for this remote Canada-based contract with NTT DATA, emphasizing Spring Boot and RESTful APIs.The Senior Applications Developer manages full systems life cycles, including analysis, design, coding, testing, and implementation. You will contribute to architecture, technology planning, integrations, and...

Build high-performance Java applications for real-time data streaming in Toronto’s hybrid model, working three days weekly in the office.This Senior Software Developer contract supports a next-generation Cash Equities data platform. You will work with Core Java, Kafka, GCP, and scalable data pipelines. The platform serves as a central data store and...

Senior Full Stack Java Developer work follows a hybrid schedule, combining onsite delivery three days weekly with two days from home.This senior assignment supports large, complex, legacy applications using Java, J2EE, Jakarta, WebSphere, and Tomcat. The work spans sustenance analysis, technical design, implementation, testing, security, databases,...

Build enterprise applications remotely from Canada as a Senior Java Applications Developer specializing in Angular, SQL, and Spring Boot.NTT DATA seeks a senior developer for a one-year engagement supporting complete systems life cycle activities. You will analyze requirements, design applications, code, test, implement, and maintain software. The work...

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 solutions...

Develop secure, high-performance applications using Java frameworks, microservices, RESTful APIs, and enterprise integration technologies in a provisionally hybrid assignment. Work Monday to Friday within stated hours.This Senior Software Developer contributes to the Criminal Justice Digital Design modernization program within Justice Technology Services....

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of...

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...

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, permitting,...

Lead Java development for complex applications, combining cloud deployment expertise with technical leadership across multidisciplinary development teams.This Senior Software Developer role guides technical direction while building enterprise or public-facing applications. You will develop interfaces, APIs, services, integrations, business logic, and...