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Added 1 day 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 1 day 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 1 day ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
Strong backend development experience in Java or Python, including REST API and microservices
Added 1 day 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 2 days ago
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IAM (SailPoint) Software Engineer
Teamrecruiter.com
Ottawa, ON
- Contract
Automate IAM processes using scripting and programming languages such as Java, Python, JavaScript, or PowerShell.
Added 2 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 2 days ago
AI
Kafka Developer
Apptoza Inc.
Toronto, ON
- Contract
We are seeking a highly skilled Senior Kafka Developer to design, develop, and maintain large-scale event-driven and real-time data streaming solutions using Apache Kafka.
Added 2 days ago
OS
Java Application Developer
Open Systems Technologies
Mississauga, ON
- Contract
Solid 10+ years of experience with Java development
Added 2 days ago
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Software Engineer - Apple, Inc.
Apple
Vancouver, BC
- Full-time
Architect and maintain backend microservices using Java and the Spring ecosystem (Spring Boot), integrating with distributed datastores and caching layers (Cassandra, Redis, Solr).
Added 2 days ago
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Senior Software Engineer - Card Network Integration
Marqeta
Remote, Canada
- Full-time
- Remote
Experience developing in Java and/or Python, however we welcome experience in other programming languages.
Added 2 days ago
IF
Lead Full Stack Developer
iA Financial Group (Industrial Alliance)
Quebec, QC
- Full-time
Has experience with integration architectures, APIs, microservices, and event-driven solutions, particularly within an Azure Cloud, Azure DevOps Services, Kafka/Confluent Cloud, and…
Added 2 days ago
TI
Senior Java Developer
Tecsys Inc.
Remote, Canada
- Remote
As a Senior Java Developer, you will join a team at the heart of the backend systems that power mission-critical supply chains in healthcare, retail, and complex distribution.
Added 2 days ago
SG
Full-Stack Developer (Java, React, Openshift)
Software Guidance & Assistance, Inc. (SGA, Inc.)
Toronto, ON
- Full-time
Software Guidance & Assistance, Inc., (SGA), is searching for a Full stack Developer (Java, React, Openshift) for a contract assignment with one of our premier Financial Services clients in…
Added 2 days ago
SG
V.I.E. Programmer Analyst
Societe Generale
Montreal, QC
- Full-time
Languages: Java, Spring Boot, Typescript (Angular), SQL, scripting languages.
Added 2 days ago
SG
Java Spring Developer
Software Guidance & Assistance, Inc. (SGA, Inc.)
Mississauga, ON
- Full-time
Software Guidance & Assistance, Inc., (SGA), is searching for a Java Spring Developer for a contract assignment with one of our premier Financial Services clients in Mississauga, ON.
Added 2 days ago
MC
Senior QA Engineer III – Automation | Banking | API | Kafka | ETL (35729)
Myticas Consulting
Ottawa, ON
- Full-time
Automate API workflows, backend validations, and data-processing scenarios using Java or Python.
Added 2 days ago
QC
Quality Assurance Engineer
Quarry Consulting
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Experience with automation technologies such as Selenium, Cypress, Playwright, Rest Assured, Java, Python, or equivalent frameworks.
Added 2 days ago
C
Développeur Java
CGI
Montreal, QC
- Full-time
Vous aurez l’occasion de contribuer à la conception et au développement de microservices robustes et évolutifs, en exploitant un écosystème technologique moderne incluant Java Spring /…
Added 2 days ago
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Java Full Stack Developer
Kelly
Mississauga, ON
- Contract
Develop full stack applications using Java, Spring Boot and React/Angular.
Added 2 days ago
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Java Backend Developer
Kelly
Mississauga, ON
- Contract
Strong experience with Java, Spring Boot and Microservices.
Added 2 days ago
RI
Senior Full Stack Java Developer - React, Spring Boot & MongoDB
Rose International
Mississauga, ON
- Full-time
Job Title: Senior Full Stack Java Developer - React, Spring Boot & MongoDB
Added 2 days ago
RI
Senior Java Full Stack Developer - Angular | Spring Boot | Microservices
Rose International
Mississauga, ON
- Full-time
Job Title: Senior Java Full Stack Developer - Angular | Spring Boot | Microservices
Added 2 days ago
AC
Guidewire Developer
ALTEN Canada
Toronto, ON
- Other
…and support Guidewire ClaimCenter solutions within a modern Java and microservices environment, collaborating with business, technology, external, and digital stakeholders (including web,…
Added 2 days ago
C
Senior Java Engineering Lead
Citi
Mississauga, ON
- Full-time
As a Senior Backend Java Engineer, you will design and build scalable backend systems that power critical applications within Citi's technology organization. This hands-on role puts you at…
Added 2 days ago
Programmer Analyst
Scotiabank
Toronto, ON
Microservices Development or Integration – Familiarity with REST APIs

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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