Senior Fullstack Developer at Stay22 | Montreal

As a Senior Full-stack Developer, you will be instrumental in architecting, developing, and maintaining top-notch, scalable, and secure software solutions. Your responsibilities will span the entire technology stack, from front-end to back-end, creating features that provide tangible business value and drive the enhancement of our platform. Close collaboration with Product Managers, Designers, and Tech Leads will be essential as you transform product concepts into dependable, high-performing, and maintainable code. Your role will meld strong technical execution with the ownership of complex projects, emphasizing active collaboration within a dynamic, cross-functional agile team.

Join KOHO as a Senior Fullstack DeveloperAt KOHO, we are dedicated to revolutionizing financial services for Canadians. Our mission is clear: to eliminate hidden fees and predatory interest rates, providing financial products that empower users to manage their spending, save effectively, and create lasting wealth. We pride ourselves on being a performance-driven organization with a compassionate approach, where outcomes matter and every effort ties back to our goal of financially empowering a generation.Our work culture at KOHO is anything but traditional. We believe impactful work comes from a team that feels trusted, empowered, and supported without compromising their personal lives. We emphasize work-life integration over balance, fostering asynchronous collaboration, flexible hours, and a remote-first environment that champions autonomy and mutual trust.As we embark on our next chapter—streamlined, smarter, and more AI-focused—we are actively seeking a Senior Software Developer who thrives in an environment that values clarity, ownership, and innovative thinking. If you are ready to contribute to a team breaking down the barriers between frontend and backend development, we want to hear from you.

Role overview The Senior Fullstack Developer joins Fullscript’s Canada Pod in Ottawa, ON. This position centers on building and refining the software solutions that drive the Fullscript platform. Collaboration is key, as the role involves working closely with colleagues from various backgrounds to design and deliver features that support a seamless user experience. What you will do Work with cross-functional teams to develop and improve platform features Design, build, and optimize software for reliability and performance Share expertise and contribute ideas to enhance applications Location This role is based in Ottawa, ON, and is part of Fullscript’s Canada Pod.

Role Overview Wabtec Corporation is hiring a Senior Fullstack Web Developer Team Leader in Montréal. This position leads a team of developers focused on building web applications for clients. The role covers both frontend and backend work, with an emphasis on delivering reliable, high-quality solutions. What You Will Do Guide and mentor developers on the team Oversee project lifecycles from planning through delivery Work closely with cross-functional teams to integrate web solutions Support the team in solving technical challenges on both frontend and backend Who We’re Looking For Significant experience with both frontend and backend web technologies Comfort leading and mentoring others Strong collaboration skills for working across teams Interest in making a meaningful impact on projects and people This position is based in Montréal.

Join Wabtec Corporation as a Fullstack AI Developer 3, where you will be at the forefront of developing innovative AI solutions that shape the future of transportation technology. We are looking for a passionate and skilled developer to collaborate with our dynamic team to design, implement, and optimize full-stack applications. Your expertise in both front-end and back-end technologies will be essential in enhancing our AI capabilities.

Job OverviewAt Future Works, we are on the lookout for a talented and results-oriented AI-Driven Fullstack Developer who possesses extensive experience in crafting custom software solutions. In this pivotal role, you will take charge of the development and deployment of scalable, high-quality applications, ensuring alignment with client needs and business goals.You will thrive in an innovative engineering environment, collaborating closely with product managers, designers, and other stakeholders to convert business objectives into robust technical solutions. By utilizing cutting-edge AI-assisted development tools, you will enhance the efficiency and quality of project deliveries while adhering to strong engineering principles.Your ResponsibilitiesDesign and develop production-quality applications using React and Next.js.Convert product and client specifications into detailed implementation plans.Leverage AI tools (e.g., Cursor, Claude Code, Codex, v0, LLMs) to streamline development processes.Stay updated with the latest AI-assisted coding practices, understanding their advantages and limitations.Review and enhance AI-generated code for accuracy, performance, and maintainability.Establish and maintain architectural standards.Integrate third-party platforms and APIs (e.g., Twilio, Stripe, Temporal) seamlessly.Deliver features promptly while ensuring system stability.Work closely with design, product management, and clients to foster collaboration.QualificationsWe are looking for candidates who are:Systems thinkers who grasp architecture beyond individual components.Comfortable operating at both high-level abstraction and detailed implementation.Able to analyze performance, scalability, and data modeling.Confident in reviewing AI-generated code and making informed engineering choices.Skilled in independently evaluating and integrating complex third-party platforms.Able to balance technical excellence with project timelines.Clear and thoughtful communicators.Proactive and self-motivated, identifying opportunities for improvement.

Role overview Xsolla seeks a Tech Lead - Fullstack Developer based in Canada to lead a team dedicated to building solutions for the gaming industry. This position works alongside cross-functional partners to strengthen the platform’s scalability and performance. What you will do Guide and mentor developers on fullstack projects Work with other teams to deliver platform improvements Lead development efforts that support platform growth and reliability

We are seeking talented Java Fullstack Developers to join our dynamic team. As a Java Fullstack Developer, you will play a crucial role in designing and implementing innovative applications that enhance our clients' operations. You will work collaboratively in an agile environment, utilizing cutting-edge technologies to deliver high-quality solutions.Key Responsibilities:Develop and maintain web applications using Java and related technologies.Collaborate with cross-functional teams to define, design, and ship new features.Debug and troubleshoot issues to optimize performance.Participate in code reviews and contribute to team best practices.

Narvar is on an exciting growth trajectory! We are in search of talented Fullstack Software Engineers who thrive in crafting both APIs and user interfaces. In this pivotal role, you will develop innovative products that enhance the post-purchase experience for leading brands in the retail sector. As a Fullstack Software Engineer, your contributions will directly influence our customer-facing products, utilizing cutting-edge technologies such as Java, NodeJS, Python, React, and GraphQL to deliver intricate features that engage millions of users.Your Daily ResponsibilitiesFrontend Development (Primary Focus)Design and implement new product features while supporting and enhancing existing functionalities.Create frontend platform components that can be utilized across our internal and external products, as well as eCommerce platforms like Shopify and Salesforce.Collaborate with fellow senior engineers to refine our overall architecture and uphold high code quality standards.Partner with product and design teams to convert wireframes and mockups into dynamic UI components.Backend Development (Secondary Focus)Assist in the development and maintenance of backend services using Golang and Node.js.Demonstrate proficiency in Google Cloud Platform (GCP), CI/CD practices, and effectively deploy code and infrastructure components.Engage with databases such as PostgreSQL, Spanner, and BigQuery.Understand and implement RESTful and GraphQL APIs.

We are seeking skilled .NET Fullstack Developers to join our innovative team. In this role, you will have the opportunity to work on exciting projects that push the boundaries of technology. If you are passionate about coding and eager to make an impact, we want to hear from you!

At Databricks, we are dedicated to revolutionizing the world of data and AI. Our goal is to make data-driven insights accessible to everyone, from pioneering the next mode of transportation to facilitating groundbreaking medical advancements. We achieve this by developing and maintaining the premier data and AI infrastructure platform, empowering our clients to leverage deep data insights to enhance their operations. Founded by engineers with a strong customer focus, we eagerly embrace every chance to tackle technical challenges, whether it involves crafting next-generation UI/UX for data interactions or optimizing our services and infrastructure across millions of virtual machines. And we are just getting started. As a Senior Fullstack Software Engineer, you will collaborate closely with your team and product management to streamline data insights for users. We seek engineers who are passionate about customer satisfaction and can oversee the entire product scope, extending their vision beyond mere technical execution. You will play a crucial role in establishing a solid foundation for the development of robust, scalable, and enjoyable products. Our Vancouver location is set to become the latest research and development hub for Databricks, enhancing our footprint in the Pacific Northwest. We are actively recruiting top-tier engineers to join us on our mission to democratize data and AI. We envision the Vancouver site as a critical catalyst for product innovation at Databricks, initially focusing on several strategic areas and multiple open roles across the following teams: Log Analytics - Our customers increasingly utilize Databricks for real-time analysis of petabyte-scale logs, presenting new challenges throughout the data processing pipeline, including ingestion, indexing, processing, and user experience. AI/BI - AI/BI is transforming Business Intelligence for the AI era. Launched last summer, this product has rapidly gained traction, with 98.7% of our data warehousing customers already utilizing AI/BI. The solutions we are developing, from intricate dashboards to advanced visualizations and interactive data exploration, present exciting technical challenges across the full stack. Unity Catalog Business Semantics - Understanding context is vital for AI. For enterprise data, this context must be governed effectively, which is the purpose of Unity Catalog Business Semantics. Recently launched at our Data + AI Summit, our first semantics modeling capability, Unity Catalog Metrics, is just the beginning. Engineers on this team work at the intersection of large-scale distributed systems, data modeling, governance, and AI enablement. Databricks Apps - Databricks Apps is one of the fastest-growing areas in our portfolio, focusing on creating seamless applications that enhance user engagement and data interaction.

About FaireFaire is a dynamic online wholesale marketplace founded on the principle that the future belongs to local businesses. Independent retailers globally outperform retail giants like Walmart and Amazon combined, yet they remain relatively small. At Faire, we harness technology, data, and machine learning to bridge this gap, empowering a vibrant community of entrepreneurs worldwide. We assist local boutiques in discovering exceptional products from around the globe to stock their shelves. Our vision is to level the playing field, enabling small businesses to effectively compete against large retailers and e-commerce platforms.By fostering the growth of independent enterprises, Faire is instigating positive economic change within local communities, on a global scale. We’re on the lookout for insightful, resourceful, and passionate individuals to join us in driving the shop local movement. If you resonate with our community values, we invite you to be part of our journey.About this role:We seek a proficient and experienced Senior Fullstack Software Engineer to join our Ads team under the Discovery pillar. In this pivotal role, you will be an essential member of a cross-functional team, developing platforms and tools that power Faire’s Ads ecosystem. Your contributions will significantly shape how advertising is implemented, optimized, and evaluated at Faire.What you’ll do:Collaboration: Engage with product managers, designers, engineering managers, and other stakeholders to greatly enhance the success of Faire's business and engineering platform.Product Ownership: Co-own our product, actively contributing to continuous improvements that elevate the customer experience.Technical Leadership: Define the team’s technical direction and roadmap, influencing the strategic trajectory of our engineering initiatives.Technical Improvements: Identify, prioritize, and drive technical enhancements through multi-month projects aimed at augmenting the platform's performance and scalability.Framework Development: Collaborate in establishing the technical direction of our server-driven UI framework. Design and implement engineering solutions that align with our strategic goals.

Join the mission at NimbleRx! We are a dynamic healthtech startup dedicated to transforming healthcare accessibility and management through innovative technology. Our goal is to create the world's most beloved pharmacy experience, focusing on enhancing both patient and pharmacist interactions. As part of our rapidly growing team, you'll experience a culture that values collaboration, transparency, and decisive action, empowering you to tackle exciting challenges and drive our growth.* Please note that sponsorship options are limited as Nimble does not have an entity established in Canada.Position Overview: As a Senior Full-Stack Engineer, you will play a crucial role in shaping the architecture and customer experiences across various web products tailored for patients, pharmacies, and other stakeholders of NimbleRx (www.nimblerx.com). You will collaborate with a talented team of software engineers committed to delivering high-performance, reliable, and scalable solutions. Your contributions will be vital in working alongside product management and design teams to understand requirements and technical use cases, ensuring timely delivery of top-quality code.Our Engineering Culture: At NimbleRx, we thrive on a foundation of mutual trust and teamwork. We believe in a collaborative environment where everyone is focused on achieving our shared objectives. Our values—empathy, simplicity, autonomy, leadership, ownership, curiosity, and proactive mentorship—guide our actions as we grow as a company.

Join Spotify's dynamic team as a Senior Fullstack Engineer on our Generative UI Platform. In this role, you will leverage your expertise in both front-end and back-end technologies to create innovative user interfaces that enhance the user experience. If you are passionate about building cutting-edge applications and collaborating with cross-functional teams, we want to hear from you!

Join our dynamic team at Opendoor as a FullStack Software Engineer. In this role, you will have the opportunity to work on innovative projects that shape the future of real estate technology. You will collaborate with cross-functional teams to design, develop, and implement scalable software solutions that enhance user experiences and drive business success.

At Vanta, we are dedicated to empowering businesses to establish and verify trust through innovative security solutions. Our belief is that security should be continuously monitored and validated, allowing companies to enhance their security practices effortlessly. Our team is composed of skilled and compassionate individuals; while some bring prior security experience, many have thrived at Vanta without it.As a Senior Fullstack Software Engineer, you will play a pivotal role in leading and mentoring our engineering team, delivering high-impact products for our customers and developing the infrastructure necessary for our business to scale effectively.With Vanta's rapid growth, it’s crucial to invest in the right abstractions and systems that will support our expansion. You will be tasked with determining the technical direction for our products and infrastructure, driving complex initiatives across our technical stack, and nurturing our talented team of engineers. Your previous experience will be instrumental in accelerating Vanta’s growth trajectory.Our company has achieved remarkable product-market fit, monetizing effectively since our first customer. We are on a fast-paced growth path, presenting engineers with defining career opportunities to enhance their skills and contribute to a dynamic, scaling organization.Explore our Vanta Engineering Blog to discover more about our current projects!Please note that we are currently hiring only in Alberta, Ontario, and British Columbia.The Governance, Risk, and Compliance (GRC) team is essential in developing and maintaining Vanta's core product offerings. These teams are vital as we transition to support enterprise customers, creating products that seamlessly integrate with existing security and compliance programs, providing valuable insights and guidance to evolve their operations.Responsibilities as a Senior Software Engineer at Vanta:Lead intricate projects involving multiple stakeholders and engineers to deliver substantial business impact.Establish direction for critical technical areas, ensuring we remain ahead of our rapid growth.Mentor junior engineers and foster an environment of continuous learning and innovation.

Vanta is looking for a Senior Fullstack Engineer to join the Emerging Products and Product Platform team. This remote position is open to candidates based in Canada. The team’s work centers on developing new features and strengthening the core product platform. Responsibilities Collaborate with teams across engineering, product, and design to design, build, and deliver software solutions Contribute to both frontend and backend systems to support a seamless user experience Influence the direction of new product offerings and platform capabilities Write code that is scalable, maintainable, and clear Requirements Proven experience building fullstack applications Interest in both user experience and backend systems Comfort working with cross-functional teams

Pebl enables organizations to hire, pay, and manage employees across more than 185 countries. The platform simplifies global hiring by handling compliance and local regulations, drawing on deep expertise. Companies use Pebl to expand internationally while staying compliant and accessing talent worldwide. Role overview The Staff Fullstack Software Engineer joins the Growth Engineering team in Toronto. This position takes on technical leadership responsibilities, shaping how scalable systems are designed and built to support user acquisition, retention, and engagement. Collaboration with product managers, designers, and other engineers is central, with a direct impact on Pebl’s growth initiatives. Day-to-day work is hands-on, involving development with React JS, TypeScript, Postgres, and AWS. The team emphasizes serverless architecture to deliver robust solutions. What you will do Design and architect scalable systems and services to support business growth. Work closely with cross-functional partners to deliver features aligned with company objectives. Guide technical decisions, define coding standards, and contribute to system architecture and process improvements. Develop, optimize, and maintain applications and services using React JS, TypeScript, Postgres, and AWS. Mentor engineers, supporting their technical development and fostering a culture of continuous improvement. Conduct technical evaluations, provide feedback, and help ensure high-quality outcomes for projects. Serve as a subject matter expert for the Growth Engineering team, staying informed about new technologies and industry trends. What makes Pebl unique Team members at Pebl have a direct impact on the company’s direction and success. Core values guide collaboration and support growth and innovation across regions in the evolving landscape of global work.

Join Future Works as a Fullstack EngineerAt Future Works, we are pioneering the future of operational transformation with cutting-edge AI and data systems. Our mission is to enhance sustainability and resilience through optimized resource utilization. As a team of 'Time Benders', we are redefining timelines for major companies across energy, real estate, data, and more.We are committed to creating exceptional, AI-driven solutions that surpass conventional service standards. Our journey is just beginning, and we aspire to become the leading Service-as-Software provider globally. Our ideal candidate is passionate about developing human-AI systems that empower teams and individuals alike, bringing energy and a drive for innovation.Your RoleAs a Fullstack Engineer, you will take charge of crafting a secure decision-support application that enhances operational efficiency. Your expertise will contribute to developing a robust web interface and backend services, enabling planners and stakeholders to confidently navigate complex operational data.In collaboration with Solutions Architects, Data Engineers, Business Analysts, and QA Engineers, you will translate intricate supply chain logic into a reliable, production-ready solution.Key ResponsibilitiesDesign and maintain the core React and TypeScript web application and backend services that facilitate planner workflows and decision support.Create data-rich interfaces including tables, filters, comparison views, dashboards, and visualizations that clarify complex outputs.Integrate optimization engines, model outputs, and business rules into product flows, ensuring recommendations are actionable and contextually relevant.Implement secure authentication and role-based access suitable for a high-scrutiny environment.Develop and manage APIs, background jobs, and orchestration to support data workflows and user responsiveness.Collaborate with Business Analysts and Subject Matter Advisors to convert operational rules and constraints into effective product features.