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Added 19 days ago
C
Backend Java Developer, Vice President
Citi
Mississauga, ON
- Full-time
…hands-on experience in developing server-side components in Java. Candidate must have experience in developing enterprise application using Java/J2EE &…
Added 19 days ago
C
Consultant, Java Back End Developer
CIBC
Toronto, ON
- Full-time
…reliable, and client-focused digital experiences. As a Consultant, Java Back End Developer, you'll play a hands-on role in designing, developing, and implementing enterprise-scale…
Added 19 days ago
O
Front End Developer 2
OLG
Toronto, ON
- Full-time
Front-End Developer Level 2 (12 months contract)
Added 19 days ago
O
Front End Developer 2
OLG
Sault Ste. Marie, ON
- Full-time
Front-End Developer Level 2 (12 months contract)
Added 19 days ago
C
Consultant, Java Back End Developer
CIBC
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…reliable, and client-focused digital experiences. As a Consultant, Java Back End Developer, you'll play a hands-on role in designing, developing, and implementing enterprise-scale…
Added 19 days ago
M
Senior Full Stack Java Engineer - Workforce Management (WFM)
Miratech
Canada
- Full-time
Design, develop, test, and maintain scalable backend services using Java, Spring Boot, and established domain-driven design practices.
Added 19 days ago
C
Engineering Lead Analyst - VP
Citi
Mississauga, ON
- Full-time
High proficiency in at least one backend object-oriented programming language (Python or Java preferred)
Added 19 days ago
C
Engineering Lead Analyst - VP
Citi
Mississauga, ON
- Full-time
High proficiency in at least one backend object-oriented programming language (Python or Java preferred)
Added 19 days ago
TC
Production Support Mobile Developer
Tata Consultancy Services
Toronto, ON
- $100,000 to $120,000 CAD / year
- Full-time
Strong experience in Java and Spring Boot for backend application support and troubleshooting.
Added 19 days ago
CS
Java developer
Cyber Space Technologies LLC
Montreal, QC
- Full-time
Strong knowledge of Core Java, OOP concepts, and Collections.
Added 19 days ago
Full Stack Engineer, Central Processing and Management Information (CPMI)
HSBC Global Services Limited
Toronto, ON
…while working across the application stack and integrating with Java-based microservices and PostgreSQL. The platform is undergoing modernization to simplify the application landscape,…
Added 19 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 19 days ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
Good years of backend development experience in Java or Python
Added 19 days ago
IG
Full Stack Engineer
Insight Global
Toronto, ON
- $50 to $65 CAD / hour
- Contract
Experience developing APIs and backend services using .NET/C#.
Added 19 days ago
RB
Software Developer
Retrospect Backup
Montreal, QC
- Full-time
We are seeking a highly motivated Software Developer to join our engineering team. In this role, you will assist and participate in the development and improvement of our software platform.
Added 19 days ago
Senior Java Developer – Application Modernization
Capco
Toronto, ON
Capco is looking for a Senior Java Developer to join a major technology modernization initiative focused on upgrading business-critical legacy applications and their supporting technology.
Added 19 days ago
RD
Full Stack Engineer
Randstad Digital
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Full Stack Developer & Senior Full Stack Developer (IoT & Cloud Solutions)
Added 19 days ago
RH
Java Software Engineer
Robert Half
Toronto, ON
- $100,000 to $130,000 CAD / year
- Full-time
We are helping a growing and highly innovative financial services organization with a new Java Engineer to join their Payments Technology team. This is an exciting opportunity for a…
Added 19 days ago
CI
Java Developer with Heavy AWS Cloud expertise-- SINDC5957260
Compunnel Inc.
Calgary, AB
- Contract
Client is looking for an AWS-based application developer to build and support serverless, event-driven and integration-heavy applications. The developer will work on backend services, AWS…
Added 19 days ago
Staff Product Security Engineer, Reviews
Okta
Toronto, ON
…possess a deep technical understanding of web applications, backend services, penetration testing methodologies, and secure design…
Added 19 days ago
Senior Software Engineer, Full-Stack Applications - Python
Fitch Group
Toronto, ON
You'll work on Ratings workflow and analytical applications using modern technologies across the full stack - from backend services in Java and Python to frontend applications in React.…
Added 19 days ago
CI
Senior Quality Assurance Analyst – Test Automation (SDET)
Canadian Institute for Health Information (CIHI)
ON · Ontario, Canada
- Contract
Familiarity with RDBMS, SQL, , BI analytical tools (eg: Qlik, Power BI, MicroStrategy etc), and web technologies (Java, HTML, JavaScript).
Added 19 days ago
Senior Software Engineer, Data Platform
Okta
Toronto, ON
Proficient in at least one language while comfortable in more than one of the backend languages, preferably Java or Typescript, Ruby, GoLang, Python.
Added 19 days ago
M
Software Engineer - Front End
Microsoft
Vancouver, BC
- Full-time
…coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent…
Added 19 days ago
A
Software Engineer - Apple, Inc.
Apple
Vancouver, BC
- Full-time
…designing and implementing full-stack solutions: building scalable backend services in Java/Spring and delivering rich, interactive web applications in modern JavaScript/TypeScript…

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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