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Added 18 days ago
C
Senior Java Engineer Tech Lead - Vice President
Citi
Mississauga, ON
- Full-time
We are seeking an experienced Senior Java Engineer, Tech Lead with strong expertise in Java, Apache Spark, Hadoop ecosystem, Hive, Databricks, and large-scale data processing platforms. The…
Added 19 days ago
C
Programmer – Aerospace Metrology Automation
Cyient
Longueuil, QC
- $90,000 to $120,000 CAD / year
- Full-time
…Jetty (PL1), Jenkins (NA), Jbehave (PL1), JavaScript (PL1), Java/J2EE (PL1), Java Swing (PL1), Jasmine (angular) (PL1), iOS (NA), Ionic(Angular) (NA), Integration Management (PL1),…
Added 22 days ago
A
Principal Software Developer
Autodesk
Toronto, ON · AMER - Canada - Ontario - Toronto - University Ave
- Full-time
Experience with high-throughput streaming or messaging systems such as Kafka, Kinesis, Flink, Spark, Apache Pinot or similar.
Added 22 days ago
KG
Principal Data Solutions Architect- AI/ML
K&K Global Talent Solutions INC.
Toronto, ON
- Full-time
Strong hands-on expertise in Apache Spark, PySpark, Kafka, Flink, Airflow, NiFi, Trino, SQL, Python, Scala, and Java.
Added 22 days ago
A
Staff Software Engineer - Open Source Data Platform (ODP)
Acceldata
Kitchener, ON
- Full-time
History of significant contributions or committer status in Apache projects (e.g., Spark, Kafka, Hive, Iceberg, Flink, etc.).
Added 23 days ago
WT
Data Engineer
Wissen Technology
Montreal, QC
- Full-time
…high‑performance data pipelines. The ideal candidate comes from a Java or Python backend background and has worked extensively with Apache Spark. Experience with Scala is a plus but not…
Added 23 days ago
TC
Data & Analytics Solutions Architect - Open Source
Tata Consultancy Services
Toronto, ON
- $110,000 to $130,000 CAD / year
- Full-time
Strong hands-on expertise in Apache Spark, PySpark, Kafka, Flink, Airflow, NiFi, Trino, SQL, Python, Scala, and Java.
Added 23 days ago
A
Principal Engineer - Open Source Data Platform (ODP)
Acceldata
Kitchener, ON
- Full-time
PMC member or committer status in Apache projects (e.g., Spark, Kafka, Hive, Hadoop, Iceberg, Flink, Trino).
Added 23 days ago
GM
Senior Software Developer
General Motors
Markham, ON · Oshawa, ON
- Full-time
Experience with Kubernetes, Docker, Terraform, Databricks, Apache Spark/PySpark, workflow orchestration, or event-driven systems.
Added 24 days ago
AS
Full Stack Software Developer
Axelon Services Corporation
Montreal, QC
- $65.52 USD / hour
- Other
Minimum 5 years of hands-on software development experience in the Java ecosystem.
Added 24 days ago
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Tech Lead - Application Development JAVA N 4C
BrightClaim
Montreal, QC
- Full-time
Agile Methodology, Apache Kafka, Java APIs, Java Database Connectivity (JDBC), Scala (Programming Language), Spark ML
Added 24 days ago
MP
Lead Data Engineer (ITA7)
Municipal Property Assessment Corporation
Pickering, ON
- Full-time
Hands-on experience with enterprise cloud data engineering technologies and programming languages such as SQL, Python, Java, Groovy, Spring Boot, Spark, Microsoft Fabric, Databricks, Azure…
Added 24 days ago
Software Engineer
Scotiabank
Toronto, ON
Proven experience with DataBricks, Unity Catalog, Delta Lake and Apache spark
Added 25 days ago
MS
Consultant Conversion - Software Eng III : Job Level - Director
Morgan Stanley
Montreal, QC
- Full-time
Develop backend services and data processing capabilities using Java, Scala, and Apache Spark.
Added 26 days ago
CS
Java developer
Cyber Space Technologies LLC
Montreal, QC
- Full-time
Strong knowledge of Core Java, OOP concepts, and Collections.
Added 26 days ago
D
Java Software Engineer
Dexian
Mississauga, ON
- Contract
We are seeking a highly skilled and passionate Senior Java Backend Developer to join our engineering team as a Senior Individual Contributor. In this role, you will be responsible for…
Added 26 days ago
C
Stagiaire - Spécialiste de données-EN
CAE
Montreal, QC
- Full-time
Expérience de travail avec les données, le codage et la création de scripts (Python/Java/Scala/SQL/JS/Bash), et avec les services cloud Microsoft : Azure, Databrick, etc. est un atout.
Added 26 days ago
OS
Java Software Engineer
Open Systems Technologies
Montreal, QC
- Contract
Experience with distributed data processing pipelines using Apache Spark, Python, and other tools and languages
Added 26 days ago
S
Senior Data Engineer, NimbleRx
Swoop
Toronto, ON
- Temporary
Optimize backend query performance where the data layer meets product code - read-replica routing, indexing, caching, and IO instrumentation in our Java/Spring services.
Added 1 month ago
T
Senior AML IT Developer
TD
Toronto, ON
- Full-time
The Java Developer / Data Engineer will join the Compliance, Surveillance & Supervision Product Technology team, which delivers technology solutions supporting the Compliance, Surveillance,…
Added 1 month ago
T
Senior AML IT Developer
TD
Toronto, ON
- Full-time
The Java Developer / Data Engineer will join the Compliance, Surveillance & Supervision Product Technology team, which delivers technology solutions supporting the Compliance, Surveillance,…
Added 1 month ago
SG
Technical Team Leader
Societe Generale
Montreal, QC
- Full-time
This includes transitioning from an Azure .NET 3-tier architecture to a modern data-driven ecosystem (Java, Kafka, Data Lake, Spark). As a hands-on leader, you will support the team in…
Added 1 month ago
SG
Programmer Analyst
Societe Generale
Montreal, QC
- Full-time
| Oracle DB| ETL | Power BI | Excel |Python |Spark | Azure Synapse |
Added 1 month ago
Software Development Engineer II, Omnichannel Metrics (OCM) - Measurement, Ad Tech, and Data Science (MADS)
Amazon
Toronto, ON
…distributed data pipelines processing billions of events in Spark/EMR, and build the AI-powered features that transform OCM from a reporting tool into an autonomous measurement platform.…
Added 1 month ago
A
Java Backend Developer (Only 100% Onsite)
André
Montreal, QC
- $70,000 to $80,000 USD / year
- Full-time
Hands on working experience with Distributed Processing Engines such as Apache Spark.

Dexian

Java Software Engineer

Mississauga, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 5, 2026
Experience: Experience: 8+ years of professional experience in application development or systems analysis, with a heavy emphasis on Java-based backend architectures.
Posting language: English
Posted: Oct 6, 2026

Original job description

Java Developer

Mississauga ON – 3days/week onsite

Contract to Hire – 2 rounds interview first virtual second onsite in Mississauga

Position Overview

We are seeking a highly skilled and passionate Senior Java Backend Developer to join our engineering team as a Senior Individual Contributor. In this role, you will be responsible for designing, building, and optimizing high-performance, robust, and scalable backend applications specialized in batch and real-time data processing.

As a senior technical leader with a strong programming background, you will drive the architecture and implementation of complex distributed systems. You will play a crucial role in analyzing system requirements, designing data flows, and ensuring clean, maintainable, and highly efficient code. This role demands deep technical expertise in Core Java, concurrency, memory management, and modern distributed data frameworks, without the burden of people management responsibilities.

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Key Responsibilities

Systems Analysis & Architecture: Analyze complex business requirements and translate them into highly scalable, reliable, and secure backend systems designs. Evaluate trade-offs between different data architecture patterns (e.g., microservices vs. event-driven).
Hands-on Programming: Write high-quality, production-ready, and performant Java code. Leverage advanced software engineering principles such as Object-Oriented Programming (OOP), SOLID design principles, and design patterns.
Technical Project Delivery: Lead the technical implementation and delivery of critical, complex backend and data-processing initiatives. Partner with cross-functional teams to ensure successful project deployment from conception through production.
Subject Matter Expertise (SME): Act as the resident Subject Matter Expert (SME) in high-throughput data processing, stream processing, or JVM performance tuning. Provide guidance on industry best practices and emerging backend technologies.
Performance Optimization: Diagnose, profile, and resolve complex performance bottlenecks, memory leaks, and concurrency issues in high-volume distributed environments.
Quality Assurance & Best Practices: Champion code quality through Test-Driven Development (TDD), comprehensive unit/integration testing, and rigid code review standards.
Mentorship: Provide technical mentorship and architectural guidance to other engineers on the team, fostering a culture of technical excellence and clean code.

Technical Skills & Qualifications

Required Qualifications:

Experience: 8+ years of professional experience in application development or systems analysis, with a heavy emphasis on Java-based backend architectures.
Core Java Mastery: Deep, expert-level understanding of Core Java (Java 11/17/21), including advanced multithreading, concurrency models, Java memory model (JVM garbage collection, heap analysis), and Collections API.
Data Processing & Streaming: Extensive hands-on experience building distributed data processing systems, ETL pipelines, and real-time streaming architectures using tools like Apache Kafka, Apache Spark, Flink, or Hadoop.
Framework Expertise: Strong experience with the Spring Ecosystem (Spring Boot, Spring Cloud, Spring Data, Spring Security) and ORM frameworks (Hibernate/JPA).
Database Management: Proficiency in designing schemas and writing optimized queries for both relational databases (e.g., PostgreSQL, MySQL, Oracle) and NoSQL stores (e.g., Cassandra, MongoDB, Redis).
Distributed Systems: Comprehensive understanding of distributed system design patterns, consensus protocols, caching strategies, and API design (RESTful APIs, gRPC).
CI/CD & DevOps: Practical experience with containerization (Docker, Kubernetes), continuous integration/continuous deployment tools (Jenkins, GitLab CI, or GitHub Actions), and infrastructure-as-code principles.
Testing: Strong advocate for testing frameworks such as JUnit, Mockito, and integration testing tools.

Preferred Qualifications:

Experience with cloud platforms (AWS, Azure, or GCP), specifically managed database and container services.
Experience in financial services, banking technology, or large-scale enterprise transaction systems.

Familiarity with Unix/Linux environments, shell scripting, and network configurations.

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More about this job

Responsibilities

Design, build, and optimize scalable Java backend systems for batch and real-time data processing, including leading delivery of complex distributed-system initiatives. Diagnose performance, memory, and concurrency issues; uphold testing and code-quality practices; and provide technical mentorship to fellow engineers.

Requirements

Requires 8+ years of application development or systems analysis experience, with expert-level Core Java and hands-on experience in distributed data processing, streaming, Spring, databases, and distributed systems. Also requires practical experience with containerization, CI/CD, and testing; cloud platforms and financial-services experience are preferred.

Skills

Core Java
Multithreading And Concurrency
JVM Performance Tuning
Apache Kafka
Apache Spark
Apache Flink
Spring Boot
Spring Cloud
Hibernate And JPA
Relational And NoSQL Databases
Distributed Systems
RESTful APIs And gRPC
Docker And Kubernetes
CI/CD
JUnit And Mockito
Test-Driven Development

Visa sponsorship

Not detected in the job text

Keywords

Java
Java 11/17/21
Object-Oriented Programming
SOLID Principles
Design Patterns
Multithreading
Java Memory Model
Garbage Collection
ETL Pipelines
Real-Time Streaming
Apache Kafka
Apache Spark
Apache Flink
Hadoop
Spring Boot
Spring Cloud
Spring Data
Spring Security
Hibernate
JPA
PostgreSQL
MySQL
Oracle
Cassandra
MongoDB
Redis
Distributed Systems
RESTful APIs
gRPC
Docker

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