Senior Engineer – API

Elevate your career as a Senior Java API Engineer with a full-time position based in Mississauga, Canada. Bring your expertise in Java, Spring Boot, and microservices to drive successful solutions.This role requires 10+ years of experience in software development, focusing on Java and Spring Boot in a practical setting. You'll work on REST and SOAP web...

Parallel Domain is hiring a Senior Software Engineer to own delivery across the stack, from API design to production. You’ll build and ship features for Python backends, REST/gRPC APIs, relational databases, and React frontends while taking ownership of reliability and quality. Expect collaboration with product, SRE, and field engineering, plus a focus on...

Source Code is seeking a Sr. Software Developer - API to design, implement, and maintain high-quality REST APIs and microservices in Java/Spring Boot. You will work on secure, scalable systems deployed on Azure, with emphasis on API documentation, testing, and robust integration patterns. The role requires hands-on experience with Spring Integration,...

Source Code is seeking a Sr. Software Developer - Back End in Toronto, Canada. The role focuses on server-side logic, database maintenance, and integration with front-end components. Strong API development and enterprise-scale experience are required. Applicants should have extensive .NET/C# experience and familiarity with Angular and Material Design....

MaintainX, a leading mobile-first work execution platform now part of Autodesk Operations Solutions, is seeking a backend software engineer to design, build, and operate public-facing REST APIs and platform services. You will own reliability, CI/CD, testing, and developer experience, collaborating with product, design, and customers to deliver scalable...

Commit in Toronto is seeking a Senior Backend Engineer to join the Customer Focus Group (CFG). You will design and maintain backend services and APIs, translating customer needs into product improvements. The role emphasizes infrastructure, performance, scalability, and customer satisfaction, with collaboration across Product, Engineering, Sales, and...

RAPS Consulting Inc in Mississauga seeks an experienced software engineer to design and deploy Python-based AI/LLM applications, using FastAPI/Flask within scalable enterprise systems. You will build REST APIs, analytics platforms, and optimized data pipelines, delivering AI-driven solutions with strong reliability. As a senior contributor, you will mentor...

Tilt is a remote-first company building scalable backend systems powering consumer-facing products. We’re seeking Senior Backend Engineers who care about reliability, scalability, and collaboration. You’ll join one of several product or infrastructure teams, tackling challenges from decisioning to payments and APIs. You’ll work on high-impact projects...

Affirm’s Engineering team builds reliable, scalable backend systems powering critical payment and servicing platforms. This remote Canada role focuses on delivering high-impact features with ownership and quality. You’ll design and ship backend services using Python or Kotlin, run on AWS with MySQL and Kubernetes, and collaborate with product, design,...