api jobs in Toronto

Build OSOR application enhancements as a Senior .NET API Developer in a provisionally hybrid assignment, using ASP.NET and Microsoft development tools. This senior position requires 10+ years of .NET experience. You will support a new OSOR-NSOR data exchange interface and related application work. The assignment covers design, development, testing,...

Test APIs, integrations, and end-to-end workflows as a Senior Software Quality Engineer at Veeva Systems, working from home or the office. Strengthen reliable releases for Veeva Network MDM and life sciences customers. This experienced QA Engineer role focuses on quality across complex, cross-platform systems. You will design test strategies, execute...

NTT DATA Services in Canada is seeking an experienced OnBase API Developer to design, build, and sustain enterprise OnBase integrations using REST/SOAP APIs, .NET/C#, and SQL. This remote Canada position requires deep OnBase expertise and cross-functional collaboration with business, QA, and DevOps teams.You will implement OnBase Unity API solutions,...

Strengthen McAfee VPN through secure API development, production troubleshooting, and AWS support from a hybrid Waterloo or Toronto location. This Full-Stack Developer position spans services, APIs, and customer-facing product experiences. You will work primarily in Scala on JVM services, contributing to Java and JavaScript when needed. Your work will help...

Drive innovation as a Senior API Developer in Toronto, ON, focusing on cloud migration strategies. This hybrid role emphasizes expertise in REST APIs and microservices for application modernization. As a key contributor, you'll lead the analysis and migration of Azure and PCF applications to Atlas. Your responsibilities will include refactoring backend...

Build API-driven automation at DUCA as a Full-Stack Automation Engineer, using REST, JSON, OAuth, and OpenAPI across financial platforms.This full-time Information Technology position supports DUCA’s automation strategy across integration, process automation, and quality engineering. You will work with the Automation Lead, Applications and Data team,...

Shape the future of API integration as a Senior Software Engineer focusing on API development. This role demands technical acumen and expertise in enterprise-level software solutions. As a Senior Software Engineer, you will be responsible for the development and support of RESTful APIs in a complex environment. This position allows you to engage with...

Lead REST API integration and application troubleshooting as a Senior Software Developer, working with Apigee, SOAP conversion, and security frameworks.This senior developer designs, codes, tests, and implements Web and Rich Internet Applications. You will support system integration, scripting, gateways, migrations, and technical assistance during software...

Lead REST API and integration analysis onsite in Toronto as a Senior Business Systems Analyst supporting TD’s Loyalty ecosystem.At TD, this senior position bridges business needs and technology solutions across distributed applications, partner integrations, and complex initiatives. You will work with Product Owners, Engineering, Quality Engineering,...

Support the Ontario Business Registry API gateway rollout through expert test planning, execution, and documentation. Guide partners testing new ReST-based integrations.This senior Systems Testing and QA Specialist serves as a subject matter expert for OBR web service configuration, access, and functionality. You will support internal and external Ministry...

Build RESTful APIs with Java and Oracle ADF BC REST at CMiC on York University’s Toronto campus. Apply object-oriented programming and SQL skills.As a Software Engineer, you will support CMiC’s front-end applications through API development. The work includes Java, Jersey, J2EE, REST over HTTP, and database-level development using SQL and PL/SQL. You...

Take on a vital role as a Senior Python Backend Engineer focusing on API and platform engineering in Toronto, Ontario. Develop scalable backend solutions for mission-critical financial platforms. This on-site position is suited for candidates with 5-10+ years of strong Python backend development experience. You will design and implement backend services...

Make a global impact with Stripe as a Backend Engineer focused on building ergonomic APIs. Join a team meeting evolving user needs through scalable financial solutions. Stripe is seeking a Backend Engineer to enhance its balance management platform and develop a new funds accessibility system. You'll collaborate with diverse teams, including Infrastructure...

Engineer secure Python APIs and shared backend platforms onsite in Toronto, using REST, OpenAPI, cloud technologies, and database expertise.Apexon is seeking a Backend Engineer specializing in Python API and platform engineering. This senior-level opportunity centers on scalable services, reusable backend capabilities, and enterprise-grade financial...

TD Securities seeks a Channels Architect to define and steward full stack architecture for GTB client experience and connectivity. You’ll drive micro-frontend shells, API contracts, and the integration layer, partnering with Data and Platform architects to enable reliable, scalable delivery.This is a hands-on role with code, design reviews, and strategic...

Lead Python backend engineering for d1g1t’s Data & APIs team in Toronto, with hybrid work and remote consideration. Shape architecture while staying hands-on.This Engineering Manager role leads a small, autonomous team within d1g1t’s Python backend organization. You will guide Django services, customer-facing importers, and document vault capabilities....

Shape modern user experiences for Manulife in hybrid Waterloo through React, Redux, responsive design, and accessible front-end engineering.This experienced Full Stack Software Engineer builds engaging interfaces while connecting APIs, databases, server-side logic, and reusable components. You will contribute across design, development, testing, deployment,...

Advance your career as a Senior Backend Developer focusing on CAD solutions, designing and enhancing REST APIs. Play a key role in ensuring system resilience through effective data handling and integrations. This Software Developer IV position requires deep expertise in backend development and API services. You will be responsible for building REST APIs,...

Build scalable APIs with Python or Kotlin as a Software Engineer II at Affi, working remotely from eligible Canadian provinces. Help shape customer contact solutions.You will work within the Contact Channels engineering team in Servicing AI Agents Engineering. The role involves shipping web applications with React or Vue, solving multi-component problems,...

Build AWS cloud-native APIs with Morningstar as a Senior Software Engineer shaping scalable data delivery services. Work hybrid with regular in-office collaboration.You will design and evolve microservices supporting global investment data access. The work emphasizes Java, Spring Boot, distributed systems, and highly available backend services. You will...