Senior/Staff Software Engineer

Roles and Responsibilities Lead the evolution of the platform's architecture, ensuring scalability and maintainability. Maintain and modernize the React-based frontend and Node.js/PHP backend. Own the design system and component library for reusability and accessibility. Enhance REST APIs focusing on security, flexibility, and performance. Optimize workflows, automation, and tooling for better developer experience (DX). Implement performance improvements such as lazy loading, caching, and server-side rendering (SSR). Improve database query performance and reduce backend bottlenecks. Oversee build pipeline improvements including CI/CD integrations. Manage cloud hosting environments such as AWS or DigitalOcean. Drive unit, integration, and functional testing adoption (Jest, Mocha, etc.). Optimize SEO strategies and implement A/B testing strategies. Act as the last stop on code reviews, ensuring high code quality and best practices. Mentor and support junior and mid-level engineers. Be a hands-on contributor, doing heavy-duty coding as needed. Job Requirements We are looking for a Senior / Staff Software Engineer to lead and enhance their technical infrastructure, drive performance optimizations, and contribute to architectural decisions that impact millions of users. The role involves full-stack development, technical leadership, performance optimization, and infrastructure management to ensure scalability and high performance. The ideal candidate will act as the last stop on code reviews, ensuring high standards in code quality and architecture. While they may not receive the Tech Lead title immediately, they will play that role in practice—mentoring junior and mid-level engineers, guiding technical decisions, and contributing to significant portions of the codebase. This is a fully remote role, with a preference for candidates based in Canada.✅ 7+ years of experience in full-stack development, with a focus on performance and scalability. ✅ Expertise in React.js, Webpack, and Node.js. ✅ Strong experience with modern PHP (or willingness to maintain/refactor legacy code). ✅ Deep understanding of performance optimization techniques. ✅ Hands-on experience with build tools, automation, and deployment pipelines. ✅ Experience designing and maintaining RESTful APIs with fine-grained access controls. ✅ Strong knowledge of SQL databases (PostgreSQL, MySQL) and caching layers (Redis, Memcached). ✅ Familiarity with containerization (Docker), process management (PM2), and cloud hosting environments. ✅ Prior experience with SEO best practices and web performance audits. ✅ Passion for building high-quality user experiences with strong attention to detail. ✅ Ability to lead code reviews and set technical standards for the team. ✅ Comfort in mentoring less experienced engineers while taking on substantial coding responsibilities. Nice to have ➕ Experience with server-side rendering (SSR) and Next.js. ➕ Familiarity with in-house ad networks and performance tracking. ➕ Knowledge of e-commerce payment integrations (Stripe, PayPal, etc.). ➕ Experience working in high-traffic consumer-facing web applications.