A well-funded early-stage SaaS technology company is hiring a Senior Full-Stack Software Engineer to join its growing engineering team. This role offers the opportunity to work across the entire stack while helping design and scale a modern product platform. The position is ideal for engineers who enjoy building scalable systems, contributing to architecture decisions, and working in a collaborative startup environment. Senior Full-Stack Software Engineer Toronto, ON (Hybrid – approx. 1 day per week in office) Early-stage SaaS startup Experience 4+ years software engineering experience Build scalable backend services and APIs powering the platform Develop modern frontend experiences using React Work across the full stack from design to deployment Improve system scalability, performance, and reliability Participate in architecture discussions and engineering decisions Mentor engineers and contribute to engineering best practices Frontend : React Cloud : AWS Infrastructure : Docker Database : MySQL Ideal Candidate Profile 4+ years of professional software engineering experience Experience building modern full-stack web applications Strong frontend experience with React or similar frameworks Backend development experience with Java / Kotlin / Spring Boot or comparable frameworks Experience with cloud infrastructure (AWS preferred) Strong understanding of scalable systems, APIs, and distributed architecture Why This Opportunity Opportunity to join an early engineering team Strong ownership over product development and architecture High-impact role within a growing SaaS platform Collaborative startup culture with experienced leadership #J-18808-Ljbffr