Senior Java Developer

2 weeks ago

Mississauga, Ontario, Canada Open Systems Technologies Full time

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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