Top Software Engineer Jobs in Toronto

Build and scale reliable backend systems and APIs for high-traffic, real-time sports betting applications. Responsibilities include writing production code, debugging and resolving software issues, developing automated tests, collaborating with cross-functional teams, and delivering scalable features using modern engineering practices.

Build and operate backend systems, APIs, integrations, automation workflows, and enterprise knowledge infrastructure for AI applications. Develop retrieval pipelines, vector database solutions, and agent-based systems while improving scalability, observability, reliability, and performance. The role requires production software engineering, modern AI architecture knowledge, clear documentation, testing, and collaboration with technical and nontechnical teams.

Build and operate Origin’s AI observability platform across data-collection agents, backend services, infrastructure, inference pipelines, APIs, and React interfaces. Design distributed systems using AWS, EKS, ClickHouse, and Kafka for high-throughput, multi-tenant production workloads. Develop internal coding agents and define AI-native engineering practices while making decisions around storage, APIs, performance, and reliability.

Design, build, and productionize LLM-powered systems (adaptive content, tutors, evaluators) and AI pipelines (RAG, embeddings, fine-tuning). Prototype and optimize models across modalities, define AI safety/evaluation/observability practices, and collaborate with product and engineering to measure learner outcomes and iterate.

Build and own user-facing features and core platform architecture across frontend, backend, and ML pipelines. Integrate AI workflows (LLMs, embeddings) for curriculum generation and automated evaluation. Manage end-to-end development: requirements, design, implementation, CI/CD, testing, observability, and iteration while collaborating with product, design, ML, and customer teams.

Design, build, and ship end-to-end features across backend services, APIs, and web interfaces. Develop scalable, reliable systems using Java, Kotlin, React, and TypeScript; solve complex scaling challenges; improve testing, observability, and code quality; and mentor engineers. Work includes internationalization, retail commerce, enterprise systems, payment infrastructure, and distributed platforms.

Lead the design, development, delivery, and operation of secure, scalable authentication platform capabilities, including sign-in, account recovery, MFA, session management, authorization, and identity federation. Collaborate with Product, Security, Fraud, Compliance, and engineering teams; improve reliability, monitoring, code quality, and security practices; resolve production issues; mentor engineers; and communicate technical decisions and trade-offs.

Build and operate secure, customer-facing repositories, package registries, APIs, and backend services in Go. Develop features from design through testing, rollout, monitoring, and iteration while improving scalability, reliability, observability, performance, and security. Participate in technical design, code reviews, production troubleshooting, and cross-functional collaboration to support artifact serving across libraries, containers, images, APKs, and other formats.

Build and launch scalable backend features and services for restaurant partners using Python and Flask. Own projects end-to-end, collaborate with product and engineering teams, identify high-impact opportunities, and maintain reliable production systems through testing, monitoring, logging, and DevOps practices. The role supports distributed agile collaboration and welcomes associate, intermediate, and senior candidates.

Build, refactor, test, and maintain secure, scalable cloud services and microservices for Guidewire’s insurance platform. Design REST or gRPC APIs, use Java and Spring, work with containers and cloud platforms, and apply CI/CD and DevOps practices. The role also involves responsible use of AI-assisted coding tools, collaboration in agile cross-functional teams, observability, code quality, and continuous improvement.

Build and scale full-stack systems supporting tens of thousands of creators. Own features from concept through production, collaborate with Product, Design, and go-to-market teams, incorporate customer feedback, and maintain high standards for quality and reliability while shipping quickly. The role requires strong product intuition, user-centered thinking, first-principles reasoning, and end-to-end ownership in a fast-paced environment.

Build and deploy software solutions at Stripe, collaborate on multi-person coding projects, learn unfamiliar systems, communicate technical work clearly, and use AI tools responsibly to accelerate development. Engineers may specialize in frontend, backend, infrastructure, or other technologies while contributing to production systems, code reviews, large codebases, and independently managed projects.

Develop and optimize high-performance React Native weather applications used by millions. Own features end to end, including clean coding, testing, CI/CD deployment to the App Store and Google Play, performance optimization, refactoring, and collaboration across AWS, Go, Node.js, Docker, Kubernetes, and microservices environments.

Own end-to-end data science and machine learning projects, including problem definition, statistical analysis, predictive modeling, deployment, monitoring, and production data pipelines. Translate business questions into measurable KPIs and actionable insights for Product, Sales, Marketing, Finance, and HR. Build maintainable code and communicate findings to technical and non-technical stakeholders while contributing to code reviews, shared tooling, documentation, and team mentorship.

Join as the founding full-stack engineer to extend a TypeScript React/Next.js prototype, design product features, integrate AI/OCR, write tests and infrastructure, talk to users, and iterate quickly to drive growth.

Build AI-powered 3D character and motion creation tools across React and TypeScript frontends, Go and Gin backend APIs, and Python or TypeScript asset-processing services. Responsibilities include developing, testing, deploying, and debugging APIs and interfaces; integrating asset conversion, rendering, and video-processing workers; and supporting authentication, API security, storage, and asynchronous workflows.

Build and operate Block’s data platform, including warehousing, orchestration, business intelligence, governance, and agentic workflows. Develop reliable Python services, developer tools, and Terraform infrastructure for petabyte-scale data. Partner with data practitioners and product teams, establish engineering standards, provide technical direction, and mentor engineers while ensuring security, reliability, observability, usability, and data governance.

Develop and maintain MCP tools and the MCP Toolbox for Databases; expand test coverage for agentic coding assistants; refactor and maintain test frameworks; convert technical posts into production-ready sample code and documentation; build real-world data applications (QueryData) to support product R&D and collaborate with cross-functional teams to accelerate agentic AI adoption.

Build and operate a scalable data platform supporting warehousing, orchestration, business intelligence, governance, and agentic workflows. Develop Python services, Terraform infrastructure, and developer tools for petabyte-scale data. Partner with data practitioners and product teams, establish security and reliability patterns, set technical direction, improve engineering standards, and mentor engineers.

Design, develop, test, and maintain enterprise full-stack applications supporting investment, credit risk, financial risk, capital markets, and accounting platforms. Build React front ends and Java/Spring Boot microservices on Azure and Kubernetes. Create APIs, database designs, and distributed systems; lead technical discussions, architecture decisions, troubleshooting, and performance improvements. Apply CI/CD, DevSecOps, automation, testing, and secure development practices while mentoring engineers.

Provides hands-on technical leadership for full-stack development, modernization, and production support of a life insurance illustration platform. Designs scalable solutions, translates actuarial and business requirements into software, modernizes legacy systems, and ensures secure, accurate, compliant calculations. Leads architecture, coding, testing, troubleshooting, CI/CD, observability, and technical reviews while mentoring engineers and coordinating with actuarial, product, architecture, operations, cybersecurity, and delivery stakeholders.

Build and maintain Quora’s machine learning platform and distributed model-serving infrastructure. Develop scalable systems for recommendation and language models, optimize GPU serving latency, throughput, and cost, improve ML tooling and feature stores, and contribute to platform modernization. The role includes production deployment, collaboration with senior engineers, mentoring, and participation in an on-call rotation.

Develop and enhance highly available, scalable, fault-tolerant IAM services on Akamai’s Compute Platform. Design resilient software, build tools for seamless deployment and operation, improve IAM features and customer experience, and research emerging technologies. The role requires extensive Linux software development, Python or Java expertise, secure software delivery, IAM knowledge, and experience with enterprise tools including Git, JIRA, and Jenkins.

Build and maintain Go backend services for billing, including usage tracking, estimates, alerts, invoicing, integrations, and migrations. Troubleshoot billing issues, protect sensitive customer and payment data, and collaborate with Finance, Product, Support, and global engineering teams. Write tested, documented code and contribute to reliable distributed systems.

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.