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Added 18 days ago
E
Staff Eng, API Design & Governance
eBay
Toronto, ON
- Full-time
Join a team of passionate thinkers, innovators, and dreamers - and help us connect people and build communities to create economic opportunity for all.
Added 18 days ago
M
Software Engineer II, Core Edge Processing
Marqeta
Remote, Canada
- Full-time
- Remote
– Win as a Team: We succeed together by embracing diverse perspectives and pushing each other to raise the bar. We lead with humility and set aside hierarchy to work as a team.
Added 18 days ago
M
Staff Software Engineer - Core Edge Processing
Marqeta
Remote, Canada
- Full-time
- Remote
– Win as a Team: We succeed together by embracing diverse perspectives and pushing each other to raise the bar. We lead with humility and set aside hierarchy to work as a team.
Added 18 days ago
M
Senior Full Stack Engineer, Customer & Cardholder Experiences
Marqeta
Remote, Canada
- Full-time
- Remote
Define and deliver well-scoped milestones for projects and may be a technical lead for projects on your team.
Added 18 days ago
PC
IT SR&ED, Manager (Bilingual FR/EN)
Pwc Canada
Montreal, QC
- Full-time
…analysis and tracking to support clients' business objectives. Our team focuses on creating proactive and value-added programs to enhance client engagement and ensure compliance with…
Added 18 days ago
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Maximo Lead with RHOP
Galent
Calgary, AB
- Contract
Have hands-on in Maximo customizations Java in the recent past
Added 18 days ago
C
Backend Java Developer, Vice President
Citi
Mississauga, ON
- Full-time
The position is within BCMA Technology, and we are seeking a Technical Lead with strong hands-on experience in developing server-side components in Java. Candidate must have experience in…
Added 18 days ago
C
Consultant, Java Back End Developer
CIBC
Toronto, ON
- Full-time
You'll join CIBC's Technology team and help build the applications and services that power secure, reliable, and client-focused digital experiences. As a Consultant, Java Back End…
Added 18 days ago
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Consultant, Java Back End Developer
CIBC
Toronto, ON · Greater Toronto Area, Canada
- Full-time
You'll join CIBC's Technology team and help build the applications and services that power secure, reliable, and client-focused digital experiences. As a Consultant, Java Back End…
Added 19 days ago
T
Software Engineer II - Angular / UI
TD
Toronto, ON
- Full-time
Easyweb team is looking to on-board a self-starting, high-performing frontend software engineer with a strong engineering mindset to help us grow in our online application.
Added 19 days ago
C
Engineering Lead Analyst - VP
Citi
Mississauga, ON
- Full-time
The Engineering Lead Analyst is a senior level position responsible for leading a variety of engineering activities including the design, acquisition and deployment of hardware, software…
Added 19 days ago
C
Engineering Lead Analyst - VP
Citi
Mississauga, ON
- Full-time
The Engineering Lead Analyst is a senior level position responsible for leading a variety of engineering activities including the design, acquisition and deployment of hardware, software…
Added 19 days ago
eTrading Engineering Lead
HSBC Global Services Limited
Toronto, ON
Build repeatable infrastructure delivery and validation pipelines using Infrastructure as Code (IaC) and automated testing, contributing production-quality Java and Ansible code
Added 19 days ago
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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 19 days ago
T
Software Engineer II - Angular / UI
TD
Toronto, ON
- Full-time
Easyweb team is looking to on-board a self-starting, high-performing frontend software engineer with a strong engineering mindset to help us grow in our online application.
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
GM
Software Engineering Manager - Vehicle Data Platform
General Motors
Oshawa, ON · Markham, ON
- Full-time
Lead, hire, and develop a team of software engineers. Set goals, give feedback, and manage performance and career growth.
Added 19 days ago
Staff Product Security Engineer, Reviews
Okta
Toronto, ON
Lead product security incidents, assess risks, and drive remediation efforts.
Added 19 days ago
CI
Senior Quality Assurance Analyst – Test Automation (SDET)
Canadian Institute for Health Information (CIHI)
ON · Ontario, Canada
- Contract
…assurance best practices, providing guidance and support to team…
Added 19 days ago
I
systems integration engineer - software
iSteer
Toronto, ON
- Full-time
Lead and co-ordinate teams of information systems professionals in the development of software and integrated information systems, process control software and other embedded software…
Added 19 days ago
JI
Application Support Specialist, Halifax
J.D. Irving, Limited
Dartmouth, NS
- Full-time
…Ontario, Newfoundland and Labrador), as well as in USA. We are a team of 20,000 dedicated employees. At J.D. Irving, Limited, you are part of a dynamic team of professionals who lead with…
Added 19 days ago
D
Delivery Lead
Delpath
Toronto, ON
- Contract
…line with the technology roadmap and mentoring the technical team members on a project-to-project…
Added 19 days ago
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Director, Engineering
NielsenIQ
Toronto, ON
- $150,000 to $176,000 CAD / year
- Full-time
We are seeking a Director, Software Engineering to lead the engineering teams building and operating customer-facing SaaS product capabilities from our India engineering hub. This leader is…
Added 19 days ago
C
Senior QA Analyst – API Testing (Insurance/GRS)
Cognizant
Toronto, ON
- $60,000 to $90,000 CAD / year
- Full-time
Lead and coordinate functional, integration, system, and regression testing for Group Retirement Services and online enrollment applications.
Added 19 days ago
Android XR Application Compatibility AI Technical Lead
Google
Waterloo, ON
…purpose programming languages including but not limited to: GO, Java, Python, C/C++, C#, Objective C, Python, JavaScript,…

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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