Java Developer
Senior Java engineer on the Core Data Platform team designing, building, and tuning high-throughput, low-latency streaming pipelines with Apache Flink (DataStream/Table/SQL APIs), Kafka/Kinesis, and RocksDB state backends, deployed on Kubernetes/AWS. Hybrid role: 3 days per week in downtown Toronto.
- Compensation
- Not disclosed
- Location
- Toronto, Canada
- Work setup
- Hybrid
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- 2+ years
- Category
- Software engineering
- Posted
Skills
Must have
- 5+ years professional software engineering experience in backend development
- 2+ years hands-on experience building production pipelines with Apache Flink
- Mastery of core Java (Java 11/17+), concurrency, multithreading, GC tuning, and memory management
- Strong experience with event streaming backbones (Apache Kafka, schema registries, consumer/producer APIs)
- Deep understanding of stream processing concepts (event-time processing, watermarking, late data handling, tumbling/sliding windows)
- Familiarity deploying Flink applications into containerized cloud environments (Kubernetes, AWS, or managed Flink providers like Ververica/Confluent Cloud)
- Must be currently living in or willing to relocate to the Greater Toronto Area and able to commute to the downtown office 3 days a week
Full description
Job Title: Senior Software Engineer – Java / Apache Flink (Hybrid)
Location: Toronto, ON (Hybrid – 3 days in-office / 2 days remote)
Position Overview
We are seeking a talented Senior Java Engineer with deep expertise in Apache Flink to join our growing Core Data Platform team in Toronto.
In this role, you will design, build, and optimize high-throughput, low-latency distributed streaming pipelines. You will play a critical part in evolving our real-time data architecture, transitioning legacy batch workflows into highly scalable, event-driven streaming solutions. This is a hybrid role requiring three days a week in our downtown Toronto office, offering a perfect balance of collaborative in-person whiteboarding and remote flexibility.
Core Responsibilities
- Pipeline Engineering: Design, develop, and maintain production-grade, stateful stream processing applications using the Java DataStream and Table/SQL APIs in Apache Flink.
- Architecture Evolution: Architect real-time event-driven systems utilizing Apache Kafka or AWS Kinesis integrated seamlessly with Flink.
- Performance Tuning: Optimize Flink cluster configurations, manage memory tuning (Managed vs. Unmanaged memory), write custom serializers, and manage RocksDB State Backend performance.
- Fault Tolerance & Reliability: Implement and manage robust state management strategies, including checkpointing, savepoints, and schema evolution rules to ensure exactly-once processing guarantees.
- Cross-functional Collaboration: Partner with Data Science, DevOps, and Product teams to translate complex business analytics into highly performant real-time metrics.
Required Skills & Qualifications
- Experience: 5+ years of professional software engineering experience in backend development, with a minimum of 2+ years of hands-on experience building production pipelines with Apache Flink.
- Java Expertise: Mastery of core Java (Java 11/17+), including concurrency packages, multithreading, garbage collection tuning, and memory management.
- Distributed Ecosystems: Strong experience with event streaming backbones (specifically Apache Kafka, schema registries, and consumer/producer APIs).
- Data Fundamentals: Deep understanding of stream processing concepts such as event-time processing, watermarking, late data handling, and tumbling/sliding windows.