Sr Backend Developer

Role: Senior Backend Developer Length: 1 year contract (strong potential for extension) Rate: $90-$100/hr INC Location: Downtown Toronto (1 day onsite) Your New Company Join a high-performing digital engineering team within a leading, enterprise-scale organization focused on building modern, scalable platforms. This team operates in a fast-paced environment, driving innovation through microservices and distributed architecture to support millions of users across digital products. Your New Role As a Senior Backend Developer, you will play a critical hands-on role in designing, building, and maintaining scalable backend systems and APIs. You will contribute directly to the development of microservices within a distributed architecture, while also supporting ongoing enhancements and maintenance of existing systems. This is a highly technical, coding-heavy role requiring strong ownership and deep backend expertise. Key Responsibilities: Design, develop, and maintain scalable backend services using Java and KotlinBuild and optimize APIs within a microservices architectureDrive system design and contribute to architectural decisions across distributed systemsWrite high-quality, production-ready code with strong testing practicesMaintain and enhance existing backend services and microservicesWork within event-driven architectures supporting real-time systemsCollaborate closely with cross-functional engineering teams What You’ll Need to Succeed 10+ years of backend development experience, with a strong focus on building scalable systemsProven senior-level experience as a hands-on Backend Developer (not just design/lead)Strong expertise in Java and KotlinDemonstrated experience building scalable APIs and distributed systemsDeep experience with microservices architectureStrong hands-on experience with Spring / Spring BootSolid knowledge of SQL and relational databasesExperience working with event-driven architecturesStrong system design capabilities and ability to influence architectureExperience with unit testing and development testing practicesProven experience maintaining and evolving existing production microservicesNice-to-Have: Experience with Google Cloud Platform (GCP) What You’ll Get in Return Opportunity to work on large-scale, high-impact backend platformsExposure to modern engineering practices across distributed systemsA highly collaborative, engineering-driven team environmentCompetitive compensation aligned to senior-level market ratesFlexible hybrid working model What You Need to Do Now If you’re a true senior-level backend developer with strong expertise in Java, Kotlin, and microservices, apply directly or reach out for a confidential discussion. Vacancy Status: This advertisement is for a current vacancy with an active client requirement. We are actively seeking qualified candidates for this position. Artificial Intelligence (AI) in Recruitment: Artificial intelligence (AI) tools may be used to support certain administrative aspects of the recruitment process, such as reviewing application information, generating candidate summaries, and scheduling activities. All hiring decisions are made by qualified recruitment professionals and/or hiring managers, with appropriate human oversight throughout the process.