Senior IT Java Developer

TD • Toronto, ON

1d • CA$105,100 - CA$129,400 • Onsite

About The Position

We are seeking a Senior Java Developer / Architect to design, build, and operate scalable, event-driven, cloud-native applications using Apache Kafka, Spring Boot, and Microsoft Azure. The ideal candidate combines strong hands-on engineering with architectural ownership of distributed systems, messaging patterns, and data-intensive services.

Requirements

• 6+ years backend or distributed systems experience
• 3+ years Java and Spring Boot
• Strong Kafka production experience (2+ years)
• Strong SQL Server experience (4+ years)
• Working Python proficiency

Nice To Haves

• Confluent Certified Developer/Administrator for Apache Kafka
• Azure Solutions Architect Expert or Azure Developer Associate
• Oracle Java OCP 11/17 or Spring Professional

Responsibilities

• Design event-driven architectures using Kafka with ownership of event contracts, versioning, and schema evolution
• Define service interaction patterns (REST vs Kafka, sync vs async)
• Lead architecture and design reviews focused on scalability, resiliency, and security
• Own non-functional requirements including latency, throughput, scalability, and capacity planning
• Design topic, partition, replication, retention, and consumer group strategies
• Implement producers and consumers with correct delivery semantics
• Apply retries, dead-letter queues, replay, idempotency, and error-handling strategies
• Manage schema compatibility using Avro/Protobuf/JSON and enforce backward/forward compatibility
• Develop Spring Boot microservices using Java 11/17+
• Build REST APIs and asynchronous workflows
• Implement resilience patterns such as retries, circuit breakers, and graceful degradation
• Ensure safe evolution using API versioning and zero-downtime deployment
• Design and optimize Microsoft SQL Server persistence
• Write and tune complex SQL queries
• Deploy and operate services on Microsoft Azure (App Service/AKS)
• Use Azure Key Vault, monitoring, and logging tools
• Implement CI/CD pipelines using GitHub Actions or Azure DevOps
• Support infrastructure as code using Terraform
• Establish unit, integration, and contract testing for distributed systems
• Participate in on-call support and root-cause analysis

Benefits

• health and well-being benefits
• savings and retirement programs
• paid time off
• banking benefits and discounts
• career development
• reward and recognition programs

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed