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Senior Java Developer

Senior Java Developer

Open Systems TechnologiesMississauga, ON, Canada
20 days ago
Job type
  • Full-time
Job description

Open Systems Tech is looking for a Senior Java Developer for one of our financial services clients based out of Mississauga / ON. This is a time sensitive opportunity, please apply ASAP.

Job Title : Senior Java Developer

Location : Mississauga – Hybrid – 3 days / week

Term : Long term contract plus extension

Backend Development (Required) :

  • Strong Core Java and functional programming experience.
  • Understanding of concurrent and parallel programming, including threads, processes, synchronization, and handling race conditions.
  • Must have deep understanding of information reporting and payments integration with ERP systems like QuickBooks, NetSuite, Xero etc.
  • Should be able to build, debug and execute code in Oracle NetSuite native scripts.
  • Able to build APIs using reactive programming, backpressure and handling complex concurrency scenarios.
  • Apply machine learning libraries to Java applications, implementing model training and prediction pipelines.
  • Strong knowledge of security protocols, asymmetric encryption, cryptographic hashing, PKI, IAM, Zero Trust Architectures (ZTA).
  • Promote Enterprise Integration Patterns (EIPs) using tools like Apache Camel, Kafka, Rabbit MQ and Spring Integration.
  • Use profiling tools to measure application performance and identify latency, memory leaks and CPU usage issues.
  • Knowledge of JVM internals like garbage collection algorithms (G1, CMS, ZGC), memory heap management and JVM tuning.
  • Mastery and deep knowledge of the Elastic Search and Kibana products are a must.
  • Strong experience in data modeling and experience with relational and no-SQL database, Oracle and MongoDB.
  • Understanding of integrating APIs with third party libraries / vendors and handle the security around it.
  • Distributed Computing Concepts : Understanding the principles of distributed systems, including data partitioning, replication, and consistency models.
  • Understanding of microservices architecture, including service discovery, API gateways, and inter-service communication.
  • Knowledge of security practices in distributed systems, including encryption, authentication, authorization, and secure communication.

Other areas (Required) :

  • Exceptional Problem-Solving and Analytical Skills to diagnose and resolve issues in distributed environments.
  • Above average skills in monitoring, logging, and debugging distributed systems to ensure reliability and performance.
  • Expertise in fundamental concepts such as consistency, availability, partition tolerance, fault tolerance, and scalability.
  • Familiarity with container orchestration (e.g., Kubernetes), and distributed messaging systems (e.g., Kafka).
  • Experience using Git / BitBucket.
  • Good communication skills, both written and verbal.

    • Other areas (Good to have) :

  • Unix shell scripting.
  • Knowledge of GraphQL.
  • Experience with building apps which are highly performant and scalable will be great.
  • Knowledge of Generating Artificial Intelligence (AI), Machine Learning (ML), and Large Language Models (LLMs).
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    Senior Java Developer • Mississauga, ON, Canada