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Added 4 mins ago
A
Lab Technician/Technologist
AtkinsRéalis
Saskatoon, SK
- Full-time
…committed to leading our clients across our various end markets to engineer a better future for our planet and its…
Added 4 mins ago
A
Lab Technician/Technologist
AtkinsRéalis
Saskatoon, SK
- Full-time
…committed to leading our clients across our various end markets to engineer a better future for our planet and its…
Added 4 mins ago
A
Senior Piping Stress Analyst Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
Registered or eligible to be registered as a Professional Engineer in the Province of Ontario (mandatory requirement).
Added 4 mins ago
A
Piping Supports Design Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
AtkinsRéalis is currently seeking a Piping Supports Design Engineer to join our Candu Energy Inc. engineering team in Mississauga, Ontario.
Added 4 mins ago
A
Senior Piping Supports Design Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
Registered or eligible to be registered as a Professional Engineer in the Province of Ontario (mandatory requirement).
Added 4 mins ago
A
Senior Piping Stress Analyst Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
Registered or eligible to be registered as a Professional Engineer in the Province of Ontario (mandatory requirement).
Added 4 mins ago
A
Piping Stress Analyst Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
…be able to follow the direction of a qualified Professional Engineer to complete assigned mechanical engineering tasks and develop the necessary engineering design…
Added 4 mins ago
A
Piping Stress Analyst Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
…be able to follow the direction of a qualified Professional Engineer to complete assigned mechanical engineering tasks and develop the necessary engineering design…
Added 4 mins ago
A
Senior Piping Supports Design Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
Registered or eligible to be registered as a Professional Engineer in the Province of Ontario (mandatory requirement).
Added 4 mins ago
A
Piping Supports Design Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
AtkinsRéalis is currently seeking a Piping Supports Design Engineer to join our Candu Energy Inc. engineering team in Mississauga, Ontario.
Added 4 mins ago
KC
Senior Embedded Software Designer
Kepler Communications Inc.
Toronto, ON
- Full-time
We're on the hunt for a top-tier Senior Embedded Software Engineer. Your focus will be on software development and maintenance required for both space and ground-based assets for a growing…
Added 5 mins ago
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Maintenance Services Worker
HealthCareersInSask.ca
Lucky Lake, SK
- Part-time
Refrigeration Engineer certificate, where required by the job
Added 5 mins ago
Maintenance Services Worker
HealthCareersInSask.ca
Loon Lake, SK
Refrigeration Engineer certificate, where required by the job
Added 5 mins ago
Facility Maintenance & Operator
HealthCareersInSask.ca
North Battleford, SK
Refrigeration Engineer certificate, where required by the job
Added 5 mins ago
H
Maintenance Services Worker
HealthCareersInSask.ca
North Battleford, SK
- Part-time
Refrigeration Engineer certificate, where required by the job
Added 5 mins ago
Maintenance Services Worker
HealthCareersInSask.ca
North Battleford, SK
Refrigeration Engineer certificate, where required by the job
Added 20 mins ago
AS
Electrical Consultant
Aker Solutions
St. John's, NL
- Full-time
Added 20 mins ago
B
Construction administrator
BPA
Halifax, NS
- Full-time
We are seeking a skilled and detail-oriented Construction Administrator / Field Engineer to support the delivery of electro-mechanical building systems projects. This role is ideal for a…
Added 20 mins ago
M
Senior Full Stack Java Engineer - Workforce Management (WFM)
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to join the Workforce Management product stream and build reliable solutions for forecasting, staffing, scheduling, real-time adherence,…
Added 20 mins ago
M
Senior Full Stack Java Engineer
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to design, build, test, and maintain reliable full-stack applications. You will use Java and Spring Boot to develop scalable backend…
Added 20 mins ago
S
Enterprise Account Executive
STA
Canada
- Full-time
…experience to the customer rather than relying on a dedicated Sales Engineer for every…
Added 20 mins ago
A
Manager, Software Engineering
AltaML
Toronto, ON
- Full-time
We overpay for the right people. We'd rather pay a premium for an engineer who embodies this and multiplies the team than save money on someone who doesn't.
Added 20 mins ago
M
Senior Full Stack Java Engineer - CX & Contact Center Solutions
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to provide hands-on technical leadership across CX and contact center solutions. You will shape scalable solutions using Java, Spring Boot,…
Added 20 mins ago
M
Senior Full Stack Java Engineer
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to design, build, test, and maintain reliable full-stack applications. You will use Java and Spring Boot to develop scalable backend…
Added 20 mins ago
M
Senior Full Stack Java Engineer - Workforce Management (WFM)
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to join the Workforce Management product stream and build reliable solutions for forecasting, staffing, scheduling, real-time adherence,…

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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