senior java api developer jobs in Toronto

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...

Senior Enterprise Java Developer and Lead We are looking for a Senior Java developer,on contract, for one of our major clients in Ontario. The work is remote. Senior Enterprise Java Developer and Lead The technical requirements for the Java Lead are the same as that of Java developer with the additional experience in managing a team of developers. ...

Build scalable enterprise applications onsite in Toronto using Java, Spring Boot, React, and Angular across full-stack delivery. Lead secure APIs and responsive interfaces.This senior contract role spans application architecture, technical delivery, and full-lifecycle software development. You will connect business requirements with backend architectures,...

MaintainX is a leading mobile-first work execution platform for industrial and frontline teams. More than 13,000 customers, including Duracell, McDonald's, Shell, DHL and Volvo, use MaintainX to cut unplanned downtime and run better operations, across 13.9 million managed assets and 79.5 million completed work orders. In August 2026 MaintainX became part of...

Design REST APIs and tested applications as a Senior API Software Developer, using Apigee, Azure, and Microsoft Power Platform technologies.This senior developer translates technical system specifications into working applications. The work includes programming, application design, testing, troubleshooting, and system integration. You will develop API...

Engineer scalable Marqeta services with Java, Spring Boot, Kubernetes, AWS, and RESTful APIs while supporting customer and cardholder experiences remotely in Ontario. This Senior Full Stack Software Engineer owns significant system components and features within Marqeta’s Customer and Cardholder Experiences team. You will independently design...

A leading software development company in Toronto is seeking a Senior Software Developer - Full Stack to contribute to innovative projects. The ideal candidate should possess expert-level skills in Angular and .NET technologies. This role involves working collaboratively in Agile teams to design and implement scalable solutions. Experience with SQL and REST...

A technology solutions company in Ontario is seeking a Senior Full Stack Software Developer with expertise in Microsoft/Azure development. The role involves front-end and back-end tasks, including designing the solution architecture and integrating APIs. The ideal candidate has extensive experience with Angular, .NET, and SQL. Additionally, strong...

Transform financial services as a Senior Java Full Stack Developer in a flexible hybrid role. Employ your expertise in Java, Spring Boot, and Angular to architect powerful applications. You’ll be expected to bring over 8 years of full-stack experience, particularly within financial institutions. This role requires proficiency in backend and frontend...

A technology firm in Canada is seeking a Senior Full Stack Software Developer with expertise in Java, microservices, and cloud computing. The role involves designing automation processes, developing and testing APIs, and collaborating across teams. Ideal candidates will have strong experience with React/Angular and a background in AI and Machine Learning....

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...

Job Functions / ResponsibilitiesCollaborates with Systems Architects, Software Team Leads and other Software Developers to design, develop and deploy technical solutions.Analyses complex information, designs, develops and troubleshoots database applications.Reviews functional requirements and prepares and documents technical program, subsystem and system...

Build Python APIs and backend systems in Toronto’s hybrid DNV office, supporting scalable platforms and AI-ready data foundations. Apply SQL and FastAPI daily.As Senior Software Developer, you will design, develop, test, and maintain platform capabilities across Digital & Transformation. Your work spans Python, SQL, FastAPI, data modeling, API development,...

Senior Full-stack Java Developer- RQ11874 (CANADA) - Onsite About the role: CCI is hiring a Senior Full-stack Java Developer. This role centers on designing, building and deploying secure, scalable Java/Spring Boot REST APIs and independent microservices. It covers the full lifecycle: API specs, relational database design, testing with JUnit, Mockito or...

Lead application enhancements as a Senior Software Developer focused on APIs, integration, and scalable architecture. This hybrid assignment combines remote work with time in the physical workplace.The Senior Software Developer builds APIs, integrates systems, and develops web applications, services, and Windows client applications. You will apply SOAP,...

Hiring: Senior Siebel CRM Developer – Siebel Public Sector | Oracle | REST APIs We are seeking a highly experienced Senior Siebel CRM Developer to design, develop, configure, integrate, and support complex Siebel Public Sector solutions. Key Requirements: 10+ years of hands-on experience with Siebel Public Sector 8.X and complex CRM solution...

About the role As a Senior Full Stack Developer, you will make an impact by designing, developing, enhancing, and supporting scalable enterprise applications that enable critical business capabilities. You will be a valued member of the engineering team and work collaboratively with architects, product owners, business stakeholders, and cross-functional...

Hiring: Senior Siebel CRM Developer – Siebel Public Sector | Oracle | REST APIsWe are seeking a highly experienced Senior Siebel CRM Developer to design, develop, configure, integrate, and support complex Siebel Public Sector solutions.Key Requirements:10+ years of hands-on experience with Siebel Public Sector 8.x and complex CRM solution...

Java expertise anchors this Senior Software Developer role in a hybrid arrangement, requiring two to three days weekly at 5700 Yonge St.Translate technical specifications into tested applications while supporting production systems. Use Java SE/EE, object-oriented design, REST, SOAP, and Oracle concepts. Apply architecture patterns, IBM Curam knowledge,...

Konrad is a next generation digital consultancy. We are dedicated to solving complex business problems for our global clients with creative and forward-thinking solutions. Our employees enjoy a culture built on innovation and a commitment to creating best-in-class digital products in use by hundreds of millions of consumers around the world. We hire...