Top Software Engineer Jobs in Toronto

Design and build end-to-end features using Python and C++; architect scalable distributed systems and performant SQL schemas; implement Docker and Kubernetes workflows on AWS; design data environments and optimize queries; integrate AI agentic tools to automate development; collaborate with cloud infrastructure to maintain resilient, cloud-native applications.

The role involves collaboration with teams to develop solutions, maintain quality standards, and provide technical support, focusing on full-stack development using a variety of technologies.

Design and build backend services for complex enterprise workflows, own data models and service reliability, improve scalability and observability, partner with Product, participate in design/code reviews, and mentor peers.

The Software Engineer in Platform Operations will design and implement core Infrastructure-as-Code solutions, manage cloud infrastructure services, and collaborate with software teams to enhance developer experience.

As a Full Stack Software Engineer at Doxel, you will design and develop full-stack applications, collaborating cross-functionally to optimize user experiences and facilitate data processing for construction projects.

Design, build, and operate resilient Java and Spring Boot backend services for inventory availability, order promising, and fulfillment. Develop event-driven Kafka integrations, concurrency and consistency controls, caching strategies, observability, and graceful degradation mechanisms. Own services from design through production, optimize performance and reliability, integrate with commerce and enterprise platforms, conduct code reviews, document architecture decisions, and mentor junior engineers.

Own quality strategy, automated testing, and test execution for omnichannel commerce capabilities. Build scalable API, integration, contract, event-driven, and end-to-end test frameworks; manage complex test data; integrate quality gates and regression testing into CI/CD pipelines; define quality metrics; validate order, inventory, fulfillment, returns, and post-purchase workflows; and mentor engineers on quality practices and automation.

Develop and maintain backend services and data pipelines to support AI/ML and GenAI workflows. Build and consume secure, scalable APIs, work with microservices on Kubernetes, collaborate on design and code review, and grow applied ML skills under senior mentorship.

Senior hands-on full-stack engineer who leads architecture, drives cross-team technical roadmaps, implements scalable Django/React systems, improves CI/CD and testing practices, mentors engineers, and partners with product, clinical, and executive stakeholders to translate business needs into durable technical solutions.

Serve as the technical leader for Auth0’s Developer Platform. Own platform architecture, design scalable distributed and event-driven systems, establish reliability and consistency guarantees, and turn ambiguous challenges into executable technical direction. Raise engineering standards through reviews and mentorship, shape developer- and agent-facing interfaces, and align architectural decisions across teams. The role requires deep IAM, backend platform, Node.js, and high-scale systems expertise, with familiarity in agentic tooling, MCP, or LLM-facing design.

Design, build, and operate Rust services powering Scribd’s large-scale Content Library and core infrastructure. Own features end to end, evolve Python tooling, optimize DataFusion, Parquet, S3, caching, and PostgreSQL/Aurora systems, and strengthen governance through lineage, authorization, and deletion controls. Lead cross-functional technical projects, support platform users, mentor engineers, improve developer workflows, and maintain production reliability through observability, on-call, and incident response.

Leads architecture and hands-on development of scalable, cloud-native full-stack applications using Java, Spring Boot, GCP, microservices, and big data technologies. Manages cross-functional engineering teams, mentors staff, establishes technical standards, and oversees secure software development, reliability KPIs, documentation, releases, and cloud optimization. Develops APIs, prototypes solutions, supports infrastructure-as-code, and collaborates with product, architecture, SRE, and business stakeholders.

As a Software Engineer, you will design, code, test, and improve Warp's platform while collaborating with multiple teams to enhance productivity.

Build and scale production inference systems and customer-facing APIs for AssemblyAI’s voice AI models. Responsibilities include productionizing research prototypes, improving latency and reliability, supporting high-volume inference traffic, developing backend services and SDKs, and collaborating with researchers, applied engineers, customers, and product teams.

Develops tester control and automation software for RAM testing hardware, supports Linux-based AI servers, and contributes to low-level memory stability and other R&D projects. The engineer will use C++, C#, and Python daily, collaborate with international R&D teams across time zones, and learn specialized hardware-testing technology.

Design, build, and maintain scalable, fault-tolerant backend services and data pipelines for an AI-driven cybersecurity platform. Implement secure APIs, optimize performance across distributed systems, establish backend best practices and CI/CD, write well-tested Python code, and mentor junior engineers.

As a Senior Full-Stack Software Engineer, you will design, build, and ship AI-powered systems to optimize workflows in the single family rental market, focusing on backend services and full-stack development in a fast-paced environment.

As a Software Engineer - L3 Support, you will resolve complex Ubuntu-related issues, collaborate with teams, and participate in upstream communities to drive bug fixes and improvements.

As a Software Engineer, you will resolve complex customer issues related to Ubuntu and open source software, participate in upstream communities, and develop and review code across multiple layers of the software stack.

Join Aleph's engineering team to develop the Core Product, focusing on user-facing features for financial data insights. Collaborate with leadership, design robust software components, and contribute to system architecture in a fast-paced, remote environment.

Work on an AI-native Strategic Projects team to turn prototypes (LLM gateways, proxies, sandboxes) into production-grade services. Own hardening, error handling, observability, operational tooling, security review practices, and customer integrations. Use coding agents and LLMs heavily, collaborate with product-minded engineers and reference customers, and ensure prototypes meet production reliability and maintainability standards. Remote role with light travel (<10%).

Design and implement high-performance, scalable message-driven applications for Linux edge systems. Participate in planning and design, write testable reliable code, work with messaging protocols, REST/gRPC APIs, and optimize for performance. Collaborate on system-level features and optionally support industrial protocols, virtualization, and system packaging.

Lead architecture and implementation across the full stack, rework user and license management, and develop core runtime components for a code-first PCB design product. Drive technical direction, identify and fix technical debt, mentor engineers, perform code reviews, and build production-ready, high-performance systems involving computational geometry and advanced visualization.

Develop and maintain production-quality software for self-driving technology. Collaborate with teams, lead discussions, and mentor engineers.

Design, develop, and maintain scalable full-stack web applications. Collaborate with stakeholders and cross-functional teams to translate requirements into technical solutions, modernize legacy systems, implement APIs and integrations, troubleshoot production issues, participate in architecture and code reviews, and drive CI/CD and DevOps practices to deliver reliable, high-quality enterprise software.