Top Software Engineer Jobs in Toronto

Design, build, test, deploy, and maintain scalable full‑stack web applications. Create responsive React frontends and Java/Spring Boot backend services on AWS. Develop RESTful APIs, database integrations, automated tests, CI/CD pipelines, and monitor performance. Collaborate with product, design, and architecture teams, participate in code reviews, write technical designs, mentor junior engineers, and apply secure, accessible, and performant engineering practices.

Design, develop, test and maintain Java/Spring applications and UI (Angular). Build RESTful APIs, work with SQL/NoSQL databases, CI/CD pipelines and Git. Support incidents, perform code reviews, collaborate with stakeholders, and deliver enhancements and fixes following Agile practices.

The Software Engineer II will develop and maintain Salesforce Loyalty Management systems, conduct APEX coding, manage data processes, mentor junior engineers, and ensure project deliverables meet quality standards.

Develop, test, and maintain marketplace applications using C#, .NET, Java, React and TypeScript. Write unit tests, participate in code reviews, debug production issues, support level-3 incidents, and collaborate with product and engineering teams. Continuously learn new tools (cloud, containers, AI) and follow engineering standards and automation best practices.

Lead architecture and delivery of an internal AI/agent platform used across product teams. Design agent runtimes and SDKs, define release gates (evals, safety, telemetry, AuthX), set standards for prompt management and model selection, partner with product teams to integrate reusable platform capabilities, write and ship production code, and mentor engineers to raise company-wide production quality for agentic systems.

Lead design and implement end-to-end features across frontend and backend for a data analytics platform. Build React/TypeScript UIs, backend services (JVM languages/Python/GraphQL), work with Postgres, cloud and distributed systems, collaborate with Product and UX, mentor engineers, improve processes, and adopt new technologies including AI to accelerate development.

Design and build machine-learning-driven robotic systems that operate in the real world, support portfolio company growth, influence product and technical direction, and advance company and career outcomes.

As a Software Developer II, you will design and implement software systems, collaborate with peers, and improve product capabilities using various technologies, particularly TypeScript and Python.

Develop, test, and deploy software solutions on Sage ERP platforms, including integration with other systems, customization, and data management.

The Cloud Software Engineer will design distributed systems for observability, ensuring reliability and performance, while automating operational work and collaborating with teams.

Lead and scale a team of full-stack and AI engineers to design, build, and deploy production AI-powered web applications. Drive architecture, cloud/ML infrastructure, DevOps and data pipelines; mentor engineers; collaborate with product, design, and QA; and ensure scalable, reliable, secure AI systems and responsible AI practices.

Design behavioral specs, harnesses, and validation systems so AI agents implement reliable full-stack features. Build CI gates, structural tests, linting, knowledge bases, and end-to-end verification. Diagnose failures across spec, harness, and agent layers. Architect and operate production systems across cloud and on-prem environments for regulated energy deployments, prioritizing reliability, observability, and graceful degradation.

Develop core backend components for a blockchain network, focusing on networking, reliability, scalability, and high-quality software practices.

Lead the Treasury team to develop and maintain backend services ensuring reliability in financial transactions, while implementing features and improving systems.

Design and implement .NET solutions using AI agents and GitHub Copilot within a spec-driven development process. Ensure test-first delivery, code quality, security, and performance. Collaborate with product, design, and data science, mentor junior engineers, and promote cross-team best practices and process continuity.

Lead technical design and hands-on development of cross-functional, fault-tolerant, multi-platform systems. Own architecture (HLD), improve developer experience and internal tools, establish engineering best practices and code review standards, provide technical expertise, and mentor junior and intermediate engineers throughout the SDLC.

Lead design and implementation of scalable, secure solution architectures and high-level designs. Create ADRs/HLDs, participate in governance, evaluate technologies, collaborate with stakeholders, mentor teams, and ensure compliance with architectural and security standards.

Hands-on technical lead within the SDLC owning design and development of cross-functional, fault-tolerant applications. Drive architecture and HLD, improve developer experience and internal tools, establish engineering best practices and code review standards, solve complex technical problems, and mentor junior and intermediate engineers.

Hands-on Staff Software Engineer responsible for technical design, architecture, and development of fault-tolerant, cross-functional microservice systems. Act as tech lead, improve developer experience, establish engineering best practices, and mentor junior/intermediate engineers.

Lead design and delivery of scalable, secure Android solutions. Provide hands-on development, architecture, and technical strategy. Mentor engineers, influence architectural roadmaps, and collaborate with cross-functional teams to align technology with business goals.

Design and oversee scalable, secure solution architectures and create ADRs/HLDs. Lead governance reviews, maintain a technical/business capability catalog, evaluate new technologies, collaborate with stakeholders, and mentor teams to adopt architectural best practices and continuous improvement.

Build full‑stack web features from zero to one, integrate with third‑party APIs, design and manage state machines for financial workflows, own features through launch and post‑launch customer iteration, and maintain high code quality and accountability.

As a full-stack software engineer intern, you'll collaborate with senior engineers to write quality code, build AI-driven products, and improve engineering productivity.

Design, build, test, deploy, and maintain scalable batch and streaming data pipelines and services processing high-volume EDI transactions. Participate in full SDLC, collaborate with analysts and product teams on analytics use cases, improve observability and performance, support production, and work in an agile, distributed team using modern DevOps practices.

Work on backend and full-stack features end-to-end with emphasis on quality, reliability, and scalability. Contribute to code, reviews, system design, and architecture. Solve distributed systems problems using Python/Go, Kubernetes, Docker, Pub/Sub, GraphQL, relational databases, and microservices while collaborating with Product and Design.