Top Software Engineer Jobs in Toronto

The QA Analyst will enhance user experience by testing web applications, creating detailed error reports, automating tests, and collaborating with engineering on improvements.

Join Clio's Toronto engineering team to build scalable, reliable web applications (primarily Ruby on Rails). Collaborate in agile, cross-functional teams, review code, optimize databases, mentor peers, and help deliver high-quality SaaS products while applying AI to improve engineering and product outcomes.

As a Software Engineer at Zip, you'll design and build core products and features, collaborate with teams, write high-quality code, and develop AI-driven features while tackling complex technical challenges.

Build scalable backend services, APIs, and applications for seller and marketplace experiences. Work across the SDLC: design, implement, test, deploy, and operate services. Collaborate with product, architecture, and engineering peers; participate in code reviews, technical discussions, and continuous improvement using modern backend technologies and software quality practices.

As a Backend Engineer, you'll build APIs, lead product development processes, and contribute to distributed systems while leveraging AI technology for improvements.

Design, develop, test, document, and maintain integrations solutions. Collaborate with analysts, architects, engineers, and business stakeholders to align technical and business goals. Support daily operations of integration applications, research and recommend best practices, and keep up to date with company operations and insurance industry trends to improve integration processes.

The Senior Full Stack Software Engineer will lead the design and implementation of AI-integrated applications, mentor team members, and engage with clients on technical scopes, emphasizing hands-on development and architectural decisions.

Build and maintain cross-platform mobile apps (primarily Flutter) and full-stack services. Design and operate serverless backend infrastructure on GCP/Firebase, model Firestore databases, implement RESTful APIs and integrations, monitor and debug production systems, support deployments, and collaborate across product, design, QA, and engineering to deliver scalable, well-tested features.

Design, build, and operate a scalable, highly available distributed cloud infrastructure. Automate cloud resource management, optimize compute/storage/network cost and performance, develop tooling for cost-efficiency insights, collaborate with engineering teams, lead large cross-functional projects, and ensure security and compliance for a multi-cloud SaaS platform.

Lead technical strategy and architecture for Coinbase Payments: design and evolve high‑availability, low‑latency funds‑flow and rails systems, drive cross‑team initiatives and reliability improvements, enforce financial correctness, mentor senior engineers, and align stakeholders across product, risk, and compliance.

Lead design and implementation of Affirm's Lakehouse Platform (Iceberg, Spark, Snowflake). Define technical strategy, enable secure governed access, improve analytics engineering practices, optimize performance and cost, operate at scale, mentor engineers, and collaborate cross-functionally to deliver reliable, discoverable, and cost-efficient analytical data infrastructure.

Design, build, and maintain backend systems and APIs for stablecoin-based pay-ins, payouts, deposits, and withdrawals. Own projects end-to-end as DRI, collaborate with cross-functional teams, resolve scalability and reliability issues, mentor engineers, and integrate blockchain/payment technologies while producing technical design documents.

Build and maintain scalable observability infrastructure and instrumentation for a large platform. Champion observability best practices, integrate services with instrumentation libraries, provision and monitor cloud-native infrastructure, troubleshoot performance and operational incidents, automate operational tasks, and lead cross-team initiatives to improve telemetry and availability.

Build, test, and maintain software across full-stack, backend, infrastructure, data pipelines, and ML infrastructure to support autonomous trucking. Develop web interfaces, backend services, APIs, and tooling; improve reliability, observability, CI/CD, and deployment; participate in code reviews, debugging, and cross-team collaboration while learning new technologies.

Design and implement real-time MAC data-plane software for high-throughput satellite links. Build packet-processing pipelines, queue and buffer management, retransmission and loss recovery, and integrate with PHY, modem, FPGA, DMA, and SoC hardware. Optimize for low latency and high throughput using zero-copy, scatter-gather, lock-free structures, and hardware offload. Lead architecture through prototyping, hardware integration, performance qualification, and operational deployment while diagnosing timing and synchronization issues.

Design, develop, maintain, and debug WebLogic/JEE and Oracle Fusion/OSB integrations. Implement EAI patterns, XQuery/XSLT transformations, support backend API calls, test SOAP/REST services with SOAP UI, and stabilize legacy middleware environments to ensure high availability.

Lead and mentor a team of developers, oversee cloud product delivery, drive engineering practices, and ensure high-quality standards while contributing to cross-functional initiatives.

Join ROOST's Coop project to design, implement, test, document, and release trust-and-safety features. Work across backend APIs, GraphQL, databases, and UI to improve reviewer workflows, detection integrations, and reporting. Lead code quality, security practices, community contribution reviews, and stakeholder coordination while engaging with users and the open source community.

Join the ROOST Osprey team to design, implement, test, and maintain a high-performance, real-time safety rules engine. Work includes building data/event pipelines, scaling and containerizing services, integrating with Kafka and gRPC, reviewing community contributions, maintaining code quality and security, and engaging with users and open source contributors to prioritize and deliver features.

Own and maintain the backend stack: build APIs and services in Node.js, manage deployments with Docker/Linux, design scalable REST APIs with Swagger, collaborate with hardware/frontend teams, and prepare sensor datasets for AI/ML pipelines with an eventual path to Lead AI Engineer.

The Software Developer II will design and develop full-stack features focusing on front-end development, contribute to product and technical discussions, and enhance the ShareGate platform's user experience with C# .NET and React.

Build and operate core backend services, APIs, and platform components for enterprise AI; integrate LLMs, retrieval and agent workflows; ensure reliability, observability, testing, and scalability; collaborate with research, product, and design to productionize AI capabilities.

As a Software Engineering Intern, you will contribute to building features for user-facing products, APIs, and scalable services for machine learning. Responsibilities include crafting code, designing data pipelines, implementing tools, and enhancing technical documentation.

Join Ema as a Software Engineer to design and develop user interfaces for web applications, collaborating with product managers and UX designers, and integrating APIs.

As a DevOps Engineer, you will design, develop, and deploy scalable SaaS solutions, automate infrastructure tasks, and collaborate on CI/CD enhancements.