Job Summary

We are looking for an experienced Java Backend Developer with strong expertise in building large-scale, distributed backend systems that process and manage high volumes of jobs. The ideal candidate will have hands-on experience designing long-running asynchronous jobs, managing large queues, implementing Dead Letter Queue (DLQ) handling, and building scalable, reliable solutions on AWS.

Key Responsibilities

- Design, develop, and maintain scalable backend services and distributed job-processing systems using Java.

- Build systems capable of handling large volumes of jobs, including long-running and resource-intensive tasks.

- Design and manage large job queues, ensuring reliable job scheduling, execution, retry, and recovery.

- Implement and maintain Dead Letter Queues (DLQs) to handle failed jobs, retries, error tracking, and message recovery.

- Develop mechanisms to copy, replicate, enqueue, and process large numbers of jobs efficiently.

- Optimize job-processing workflows for throughput, latency, scalability, and fault tolerance.

- Build asynchronous processing architectures using AWS services and messaging technologies.

- Implement monitoring, logging, alerting, and troubleshooting for job queues and backend services.

- Ensure data consistency, idempotency, and reliable processing across distributed systems.





- Collaborate with engineering and infrastructure teams to design robust backend architectures.

Required Skills

- Strong hands-on experience with

Java backend development.

- Experience building large-scale, distributed backend applications.

- Strong understanding of asynchronous processing, background jobs, and long-running tasks.

- Experience managing large queues and high-volume job processing.

- Hands-on experience with

Dead Letter Queues (DLQs)

, retry mechanisms, and failure recovery.

- Experience with

AWS services for backend processing and queue management.

- Knowledge of concurrency, multithreading, fault tolerance, and distributed system design.

- Robust debugging, performance tuning, and problem-solving skills.

Preferred Skills

- Experience with AWS SQS, SNS, Lambda, ECS, or other relevant AWS services.

- Experience with message brokers such as Kafka or RabbitMQ.

- Experience implementing bulk job creation, copying, replaying, or reprocessing workflows.

- Familiarity with queue monitoring, back-pressure, rate limiting, and workload management.

- Experience with observability tools, metrics, logging, and distributed tracing.

- Knowledge of database optimization and transaction management in high-throughput systems.

📌 Java Backend Engineer (Canada)
🏢 Fierceli Inc, MBE, SBE
📍 Canada