Top React Developer Jobs in Toronto

Join a fast-growing startup focused on revolutionizing the roofing industry, contributing to engineering projects impacting customer acquisition, monetization, and retention. Collaborate with product and design teams to prototype new features, write rapid UI components, and set up A/B tests to enhance user experience. Bring strong skills in Javascript, React, Redux, Laravel, PHP, and PostgreSQL.

Backend Product Software Engineer specialized in building the next generation sync engine for collaboration and distributed work. Responsible for designing and developing software to reach millions of daily users, partnering with stakeholders, and optimizing features for Windows, macOS, and Linux.

As a Senior Backend Engineer at GitLab, you will work on remote development solutions, specifically focusing on Workspaces. You will collaborate with experienced team members to shape product offerings and roadmap, contributing to enhancing productivity for developers.

Full Stack Engineer at Noyo, responsible for building and maintaining Noyo's API and App offerings for benefits platforms. Collaborate with teams to improve performance, reliability, and scalability of systems. Required to have experience building modern web applications in a product-driven environment and working in an agile environment. Minimum of 3 years of full-time professional experience.

Seeking a Senior Software Engineer to build out financial products and features providing new levels of accessibility and flexibility to users. Will architect, design, and implement new API and microservice interfaces to manage users' transactions with Affirm.

Senior Backend Engineer role at GitLab working on the Gitaly team, responsible for designing and developing the Git data storage tier and contributing to a distributed cluster solution. Responsibilities include architectural discussions, designing RPC interfaces, developing and monitoring Gitaly, and ensuring high availability.

As a Senior Frontend React Engineer, you will be responsible for developing websites based on technical and functional specifications, maintaining existing sites, utilising source control tools, testing websites, and contributing ideas for application improvement. You should have a Bachelor's degree in Computer Science, at least 5 years of experience as a Frontend Web Developer, and expertise in React.js and web technologies.

The Partner Interfaces group at Affirm is looking for a highly motivated and experienced Software Engineer I to join the team. The role involves working on APIs and webhooks for integrations with merchants and partners, managing partner APIs and tools, and contributing to the growth of the merchant network.

Babylist is seeking a Backend Software Engineer to join the Fulfillment and Operations Engineering team. Responsibilities include scaling technical systems for Babylist's ecommerce business and driving efficiencies within the Supply Chain network.

Join Applied Systems, Inc. as a Software Engineer (Golang/React) to participate in the full software development lifecycle of a Commercial Lines insurance software product. Work in an Agile environment to design and maintain web-based solutions using React, Golang, and SQL within a microservice architecture. Collaborate with agile scrum team, design front-end architecture, implement RESTful services, review code, and ensure security and scalability.

Seeking a Senior-to-Principal Backend Software Engineer to build out platform products for a cybersecurity company. Responsibilities include building fault-tolerant Golang microservices, supporting high-volume Kafka event pipelines, working on cross-team initiatives, and troubleshooting production issues. Must have 8-10+ years of relevant experience, recent experience with event-driven, microservices-oriented architecture, expertise in backend languages, and a degree in Computer Science or related field.

Lead backend engineering efforts in a remote-first culture, leveraging cloud-based systems, collaborating with cross-functional teams, and embracing the newest technologies. Mentoring team members, improving product architecture, and contributing to the open-source community.

Develop and maintain backend services for scalability and reliability, work on monitoring services, collaborate with multiple teams to enhance infrastructure and products, and mentor other developers on web security strategies. Must have 4-8 years of backend development experience, a degree in Computer Science or equivalent, and expertise in object-oriented languages such as Golang, Java, Scala, Kotlin, Python, or Node.js.

Babylist is looking for a Full Stack Engineer to join their Babylist Shop team. The role involves working on critical initiatives to enhance the user experience and make Babylist the go-to destination for baby commerce. The engineer will collaborate with various teams to execute key initiatives.

Senior Software Engineer on the Justice Engineering team responsible for designing full-stack tools and services to keep Block safe, collaborating with global engineering teams, and working with remote team members in North America and Europe.

Responsible for providing technical leadership, software design and implementation, and driving high-quality backend system development. Opportunity for technical leadership, innovation, and impact through the development of sophisticated backend systems. Collaborate with cross-functional teams to deliver innovative products for global brands.

Babylist is looking for a Fullstack Software Engineer to join the Growth team. The role involves building key experiences for users, collaborating with various teams, and driving business growth. The ideal candidate has 5+ years of experience in Ruby on Rails and React, excels in a fast-paced environment, and possesses a growth mindset.