Senior Staff Backend Engineer

TEKsystems•Toronto, ON

7d•CA$110 - CA$125•Hybrid

About The Position

We’re more than just a global e-commerce platform — we’re transforming how people shop and sell across the world. Our platform empowers millions of buyers and sellers across 190+ markets. We’re committed to pushing boundaries and redefining the future of digital commerce. Our customers are at the center of everything we do. We foster a culture where authenticity thrives, bold ideas are encouraged, and individuals can bring their full selves to work every day. We’re building sustainable solutions for our customers, our business, and the broader global community. Join a team of passionate engineers, innovators, and problem-solvers working together to build scalable platforms and create meaningful economic opportunities worldwide.

Requirements

Java, spring boot, graphql, rest api, microservices
Experience supporting platforms with millions of users and high transaction volumes
Experience defining and driving architecture across multiple teams and domains
Strong leadership in a matrixed environment, influencing engineering, product, and business stakeholders
Experience navigating ambiguous problem spaces and defining technical direction from scratch
Expertise in event-driven architecture and highly scalable distributed systems
Strong understanding of messaging systems (Kafka, ActiveMQ, RabbitMQ, etc.)
Experience with both RDBMS and NoSQL databases
Hands-on experience with containers and cloud infrastructure (Kubernetes, Docker, AWS, GCP, Azure)
Proven success creating and driving adoption of engineering best practices, standards, and tooling
Experience authoring and socializing Architecture Decision Records (ADRs)
Strong track record of mentoring engineers and raising the engineering bar
Experience modernizing legacy systems and creating a long-term technology vision
Ownership of release management, production support, and on-call responsibilities for critical systems
Excellent communication skills with a strong sense of ownership and accountability
Demonstrated ability to balance short-term delivery needs with long-term scalability and maintainability
Growth mindset with a passion for continuous learning, knowledge sharing, and organizational impact
Experience influencing engineering culture, processes, and technical excellence beyond their immediate team
Ability to identify future platform needs and build flexibility and extensibility into system designs
Experience working across adjacent disciplines such as product management, project management, and people leadership
Active participation in internal or external technical knowledge-sharing communities

Nice To Haves

Experience with GraphQL

Responsibilities

Independently lead complex technical initiatives within and beyond your team
Drive technical direction and roadmap, leading across domain teams and guiding key engineering decisions
Author Architecture Decision Records (ADRs) to define scalable and maintainable solutions
Own one or more large functional areas with deep subject matter expertise
Take a systems-thinking approach, proactively addressing performance, security, and scalability
Drive projects end-to-end, from conception to successful implementation
Act as a change agent to elevate engineering culture, processes, and best practices
Enable teams through collaboration, knowledge sharing, and internal tooling
Identify platform areas that require flexibility and design for future scalability
Define and advocate for long-term technical vision and modernization strategies
Lead production support, release management, and on-call responsibilities for a 24/7 platform