senior back end engineer javaolap jobs in Toronto

# Software Developer - Back End - SeniorToronto, ON, CanadaApply NowContractWorkspaceOn-SiteStart Date2026-11-02Job TypeClientLabour and Transportation ClusterHourly Wage74-87End Date2027-09-30## Job DescriptionResponsibilities / Deliverable / Skill Set Requirements – · Analysis leading to detailed information related to the current system logical and...

Bree is expanding its engineering team in Canada to deliver scalable, AI-assisted financial services. You will own major product areas from discovery through production, collaborating with Product, Design, CX, and other engineers to shape solutions and release features.The role emphasizes architectural decisions, platform modernization, and reliable,...

Docebo is seeking a Senior Product Engineer II who bridges frontend, backend, and platform work to own features end-to-end. You will design data models, APIs, and integration points while shaping scalable solutions across teams. You’ll mentor engineers, drive automated testing, CI/CD, and observability, and collaborate with Product, Design, QA, SRE, and...

CoStar Group, a global real estate information leader, seeks a Senior Data Quality Engineer in Toronto to build and operate testing for the enterprise data platform. You will design end-to-end validation, create reusable testing frameworks, and partner with product and data teams to translate definitions into measurable tests. The role emphasizes data...

CoStar Group, a global real estate information leader, seeks a Senior Data Quality Engineer in Toronto to build and operate testing for the enterprise data platform. You will design end-to-end validation, create reusable testing frameworks, and partner with product and data teams to translate definitions into measurable tests. The role emphasizes data...

We’re Proof, a high growth company in the legal tech industry, launched in 2017. We’ve built a best‑in‑class legal services platform used by thousands of law firms with a sustained average growth rate of over 10%. Our marketplace platform helps law firms and pro se parties access more efficient, transparent, and accessible legal services that are not...

Since 2015, Mejuri has reimagined what fine jewelry can be in a modern world—shifting it from a traditional gift to to a personal choice rooted in self-expression. Founded by third-generation jeweller Noura Sakkijha, the brand was built on a simple idea: fine jewelry shouldn’t require a special occasion, and it should never come with guilt. It’s about...

Bree is expanding its engineering team in Canada to deliver scalable, AI-assisted financial services. You will own major product areas from discovery through production, collaborating with Product, Design, CX, and other engineers to shape solutions and release features. The role emphasizes architectural decisions, platform modernization, and reliable,...

Elevate your career as a Senior Back End Developer specializing in C++ and Python within the innovative geoscience sector in Toronto, ON. This hybrid role requires collaborative efforts to create cloud-based modeling workflows. Join a reputable client leading in geoscience advancements while developing scalable Python back-end services and modern...

Paddle is seeking a Senior AI Engineer to join the Data & AI team and work with the Go-To-Market organisation. You will design AI-powered systems, build agentic workflows, and deploy solutions end-to-end from prototype to production, collaborating with Marketing, Sales and RevOps to drive business impact. The role emphasizes turning evolving AI capabilities...

Relay is seeking an Senior Application Security Engineer II to own a defined slice of our platform end-to-end, testing services, identifying exploitable gaps, and fixing issues alongside our senior engineers who maintain the auth system and build DAST tooling. You will threat model designs, run white-box tests, triage bug reports, and coordinate fixes with...

Relay is seeking an Senior Application Security Engineer II to own a defined slice of our platform end-to-end, testing services, identifying exploitable gaps, and fixing issues alongside our senior engineers who maintain the auth system and build DAST tooling. You will threat model designs, run white-box tests, triage bug reports, and coordinate fixes with...

Paddle is seeking a Senior AI Engineer to join the Data & AI team and work with the Go-To-Market organisation. You will design AI-powered systems, build agentic workflows, and deploy solutions end-to-end from prototype to production, collaborating with Marketing, Sales and RevOps to drive business impact.The role emphasizes turning evolving AI capabilities...

Drive innovative front end projects at Wealthsimple as a Senior Front End Engineer. Focus on enhancing client-facing trading experiences while leveraging advanced technology and performance standards. Wealthsimple, Canada’s financial innovator, is seeking a Senior Front End Engineer to manage high-impact projects on its trading and investing teams. This...

Drive innovative front end projects at Wealthsimple as a Senior Front End Engineer. Focus on enhancing client-facing trading experiences while leveraging advanced technology and performance standards. Wealthsimple, Canada’s financial innovator, is seeking a Senior Front End Engineer to manage high-impact projects on its trading and investing teams. This...

Caddie builds software for analytical testing laboratories and regulated industries. You will own server-side components, from cloud to on‑prem deployments, and ensure accurate data handling from instruments to the lab software.You will design scalable data processing, work with FastAPI, NumPy, and SQL, and contribute to an architecture that runs in...

Drive transformation in restaurant technology with OpenTable as a Senior Frontend Developer. This hybrid role, starting remote, builds systems for optimizing real-time restaurant activities. In this position, you will deliver scalable solutions for reservations and service workflows within the Front of House team. Candidates should possess a deep...

Become a key part of our team as a Back End Developer in a hybrid work environment situated in Downtown Toronto. Your microservice skills and database experience will drive key application projects. This permanent position is perfect for an engineer with 8 to 15 years of experience, particularly those with 5 to 10 years in senior engineering roles. You'll...

A tech-driven retail solutions provider in Toronto is seeking a Senior Frontend Engineer to enhance core product experiences across web and mobile platforms. You will own frontend features from implementation to production, collaborating closely with product and backend teams. The ideal candidate has strong experience in frontend applications, proficiency in...

Join Four Seasons as a Senior Front End Engineer in a hybrid capacity, enhancing the guest experience through innovative technology solutions. Use your skills in UX/UI and development to craft responsive digital interfaces. You will play a crucial role in modernizing our Property Management System, delivering accessible and engaging user experiences for...