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Added 19 days ago
VA
Computer Vision Engineer
Volatus Aerospace
Vaughan, ON
- Full-time
Volatus Aerospace is seeking a Computer Vision Engineer to develop and deploy vision and image-processing capabilities for UAVs or relevant systems.
Added 19 days ago
VA
Controls & Dynamics Engineer
Volatus Aerospace
Vaughan, ON
- Full-time
Volatus Aerospace is seeking a Controls & Dynamics Engineer to develop, validate, and tune UAV flight behaviour across aircraft configurations, payloads, and operating conditions.
Added 19 days ago
JI
Reliability Student/Co-op- Winter 2027
J.D. Irving, Limited
Halifax, NS
- Full-time
…alongside experienced professionals - including the Reliability Engineer, Maintenance Inspector, Maintenance Quality Specialist, and Reliability Technologist - who are dedicated to keeping…
Added 19 days ago
N
Senior Cloud Systems Engineer (CI/CD & Data Platform)
Numeris
Toronto, ON
- Full-time
Numeris is seeking a Senior Cloud Systems Engineer to lead the design, automation, and operation of enterprise cloud platforms across AWS and Azure. This role combines deep expertise in…
Added 19 days ago
N
Enterprise Cloud & Platform Engineer
Numeris
Toronto, ON
- Full-time
The Enterprise Cloud & Platform Engineer is responsible for the design, implementation, administration, continuous improvement, security, and operation of enterprise cloud, network,…
Added 19 days ago
N
Principal Optical Engineer
Nokia
Ottawa, ON
- Full-time
We are seeking an experienced Principal Optical Engineer to join Nokia's optical team. You will own calibration, sustaining, and optical integration for our high-speed coherent linecard…
Added 19 days ago
Technical Services Engineer (Timmins ON)
Orica
Timmins, ON
Build trusted technical relationships with customers and identify operational needs, continuous-improvement opportunities, and potential business development opportunities
Added 19 days ago
AT
Senior Data Engineer
Arkhya Tech Inc.
Toronto, ON
- Contract
This position is for a Senior Data engineer with a background in Python, Pyspark, SQL and data warehousing for enterprise level systems. The position calls for someone that is comfortable…
Added 19 days ago
GM
Projects Engineer, Tailings
Gibraltar Mine
McLeese Lake, BC
- Full-time
We are seeking a project focused Tailings Engineer to lead capital and sustaining projects associated with Gibraltar Mine's Tailings Storage Facility (TSF) and mine water management…
Added 19 days ago
Quality Supervisor
Aecon
Kincardine, ON
Are intentional when it comes to investing in your development. We help you build your career and advance your skills through our Aecon University, tuition reimbursement, and Leadership…
Added 19 days ago
H
Electrical Installations Design Engineer –Rail Systems
Hitachi
Toronto, ON · (STS) Toronto - Ontario Line Project
- $95,102 to $142,653 CAD / year
- Full-time
Electrical Installations Design Engineer – Rail Systems
Added 19 days ago
RA
Senior Consultant
Revay and Associates Limited
Toronto, ON
- Full-time
…is essential for this role. Registration as a professional engineer with the Professional Engineers Ontario (PEO) or the ability to register would be an…
Added 19 days ago
VC
Senior Temporary Works Inspector H/F
VINCI Construction Grands Projets Hellas S.A.
Toronto, ON · Greater Toronto Area, Canada
- Temporary
As a Temporary Works Inspector, you will support the Temporary Works Engineer in the inspection, verification, and monitoring of temporary works during the construction lifecycle. You will…
Added 19 days ago
WI
Senior Technical Director - Tailings, Waste Dumps and Stockpiles
WSP in Canada
Vancouver, BC
- Full-time
Added 19 days ago
WI
Senior Technical Director - Tailings, Waste Dumps and Stockpiles
WSP in Canada
Vancouver, BC
- Full-time
Added 19 days ago
D
Java Software Engineer
Dexian
Mississauga, ON
- Contract
Quality Assurance & Best Practices: Champion code quality through Test-Driven Development (TDD), comprehensive unit/integration testing, and rigid code review standards.
Added 19 days ago
WI
Senior Environmental Engineer / Geoscientist
WSP in Canada
Toronto, ON
- Full-time
…community, helping shape projects that support responsible development in mining, energy, infrastructure, and resource‑based sectors critical to the…
Added 19 days ago
L
Senior QA Automation Engineer – Cypress
LTM
Mississauga, ON
- $103,554 to $115,200 CAD / year
- Full-time
Title: Senior QA Automation Engineer – Cypress
Added 19 days ago
EG
Team Lead, Land Development (Subdivisions)
Egis Group
Ottawa, ON
- $125,000 to $150,000 CAD / year
- Full-time
Team Lead, Land Development (Subdivisions) based in Ottawa, Ontario is responsible for leading and growing the subdivisions practice within the Land Development team. The role provides…
Added 19 days ago
QA Automation Engineer – SmartBear & Playwright
Capco
Toronto, ON
Capco is looking for a QA Automation Engineer with hands-on experience in SmartBear TestComplete and Playwright to support a major application modernization initiative.
Added 19 days ago
O
Technical Services Engineer (Timmins ON)
Orica
Timmins, ON
- Full-time
Build trusted technical relationships with customers and identify operational needs, continuous-improvement opportunities, and potential business development opportunities
Added 19 days ago
L
Full Stack Engineer
Leyton
AB · Alberta, Canada
- €30,000 to €50,000 EUR / year
- Full-time
We are looking for an experienced engineer who has owned production software and can help define architecture, engineering standards, and development practices as the team grows.
Added 19 days ago
T
Software Engineer II - Angular / UI
TD
Toronto, ON
- Full-time
…opportunities to all colleagues. Growth opportunities and skill development are defining features of the colleague experience at TD. Our compensation policies and practices have been…
Added 19 days ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
As a Staff Engineer supporting the ADT - CODI program within Operations Technology, you will lead the technical design, development, and implementation of complex, multi-platform…
Added 19 days ago
RT
Electrical Engineer
Rio Tinto
Labrador City, NL
- Full-time
We are looking for an Electrical Engineer to support Technical Services by maintaining, developing and implementing engineering standards, systems and tools that enhance the reliability,…

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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