Backend Software Engineer

Senior Backend engineer Toronto ON, Canada- onsite hybrid 3 days per week Contract through 12/31/2025, will likely extend to end of 2026. Job Description: We are seeking a strong individual contributor backend engineer with hands-on experience architecting and building large scale distributed web applications. You should be able to own the end-end architecture from front end to back end systems and guide the team on core technical design. Responsibilities: Collaborate closely with peers, Architects, Product Managers, Business Analysts, Quality Engineers, and Operations teams to develop innovative solutions that meet functional and non-functional standards and expectations. Be involved in development, testing, release, triage, bug fix, documentation and work in an Agile environment. Use of tools like JIRA, Git, CI/CD and other internal eBay tools on a regular basis to organize work and deliver features. Evaluate and define storage needs and make technology recommendations, define domain services and interface definitions and testing architecture. Design and build high-performing, reliable solutions for high-throughput, distributed systems using a variety of third-party and eBay internal libraries and frameworks Participate in technical design and code reviews and provide feedback to other engineers on the team. Estimate engineering efforts, roadmap planning and be responsible for operational processes, such as automation and controls, to help with efficiency and quality of both manual and technical operations. Requirements 1 senior role: Bachelor’s degree in Computer Science or related field plus 12 years of experience in Java in building large-scale web based distributed systems. 1 midlevel role: Bachelor’s degree in Computer Science or related field plus 8 years of experience in Java in building large-scale web based distributed systems. Thorough understanding in computer science fundamentals, data structures and algorithms and extensive experience in building highly available, scalable and robust applications. Excellent object oriented design and coding skills in Java or other OO languages, hands-on experience using unit/integration test frameworks like Karate to build fully automated software applications Solid understanding of relational and NoSQL databases, data storage/access patterns, caching techniques, messaging systems and asynchronous workflows Experience with bug triaging and debugging techniques, logging and monitoring systems, application and query performance tuning Good understanding of web services and SOA related standards like REST/OAuth/JSON Familiarity with front end technologies and patterns is desirable Excellent verbal and written communication skills Pay Range: $50- $55/hr T1 no benefits The specific compensation for this position will be determined by a number of factors, including the scope, complexity and location of the role as well as the cost of labor in the market; the skills, education, training, credentials and experience of the candidate; and other conditions of employment.