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Added 2 days ago
E
Staff Eng, API Design & Governance
eBay
Toronto, ON
- Full-time
Experience working in Agile environments and using modern developer productivity tools, with additional strength in areas such as federated GraphQL, cloud-native or microservices…
Added 2 days ago
M
Senior Full Stack Engineer, Customer & Cardholder Experiences
Marqeta
Remote, Canada
- Full-time
- Remote
We are looking for a Senior Full Stack Software Engineer to join our Customer & Cardholder Experiences team, delivering innovative UIs and embeddable solutions to transform the experience…
Added 2 days 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 2 days ago
CS
Java developer
Cyber Space Technologies LLC
Montreal, QC
- Full-time
Strong knowledge of Core Java, OOP concepts, and Collections.
Added 2 days ago
TC
Senior Java Low Latency Developer
Tata Consultancy Services
Mississauga, ON
- $100,000 to $120,000 CAD / year
- Full-time
We are seeking an experienced Senior Java Low Latency Developer to join our Payments
Added 2 days ago
Full Stack Engineer, Central Processing and Management Information (CPMI)
HSBC Global Services Limited
Toronto, ON
Join the Central Processing and Management Information (CPMI) technology team in Toronto as a Software Engineer focused on full stack development across JavaScript, Node.js, and modern…
Added 2 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 2 days ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
Strong backend development experience in Java or Python, including REST API and microservices
Added 3 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 3 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 3 days ago
M
Senior Software Engineer - Card Network Integration
Marqeta
Remote, Canada
- Full-time
- Remote
Marqeta is seeking a skilled Senior Software Engineer to join the Network File Integration team. In this role, you will help design and deliver scalable software solutions for batch and…
Added 3 days ago
MC
Senior QA Engineer III – Automation | Banking | API | Kafka | ETL (35729)
Myticas Consulting
Ottawa, ON
- Full-time
You are a hands-on senior QA automation engineer who can go beyond executing existing test scripts. You can design frameworks, understand complex backend integrations, trace data across…
Added 3 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 3 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 3 days ago
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Lead Java Developer, Vice President
Citi
Mississauga, ON
- Full-time
The Applications Development Technology Lead Analyst (Lead Java Developer) is a senior-level position responsible for leading the architectural design, implementation, and continuous…
Added 3 days ago
M
Senior Full Stack Java Engineer
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to join our engineering team and and contribute to the development of solutions for telecom and contact center environments. The ideal…
Added 3 days ago
X
Engineer
Xero
Vancouver, BC
- Full-time
…collaborating across teams to drive technical excellence and developer…
Added 3 days ago
A
Senior Software Developer
Autodesk
Toronto, ON · ON · BC · AMER - Canada - Ontario - Toronto - University Ave
- Full-time
We are seeking a Senior Full-Stack Staff Engineer to provide hands-on technical leadership across our web platform and digital experience ecosystem. This role will be responsible for…
Added 3 days ago
M
Senior Full Stack Java Engineer
Miratech
Canada
- Full-time
We are looking for a Senior Full Stack Engineer to join our engineering team and contribute to modern solutions for contact center environments.
Added 3 days ago
I
Lead Java Developer
Infoya
Toronto, ON
- $110,000 to $115,000 CAD / year
- Full-time
About the Job: Infoya is seeking a hands-on Lead Java Developer who is already operating at a technical lead level and demonstrates the curiosity, judgment, and enthusiasm to grow into…
Added 4 days ago
3
Senior Software Engineer - Java, Angular REQ_60 REQ_34
3Pillar
Canada
- Full-time
Solid software development experience using Java.
Added 5 days ago
T
Staff Software Engineer
Twilio
Remote, Canada
- Full-time
- Remote
Join the team as Twilio’s next Staff Software Engineer.
Added 6 days ago
T
Senior Software Engineer (L3)
Twilio
Remote, Canada
- Full-time
- Remote
As a Software Engineer (L3), you will be a key technical contributor driving the feature design, execution, and operational health of platform services that process millions of requests.…
Added 6 days ago
NS
Senior DevOps Engineer, AI Platform
Network Solutions
Canada
- Full-time
We are looking for a hands-on Senior DevOps Engineer to build and operate the infrastructure powering our AI platforms, agent runtimes, web applications, backend services, APIs, and shared…
Added 6 days ago
HT
G12 / BB Senior Software Engineer, Performance & Scale
High Tech Genesis
Ottawa, ON
- Contract
The engineer will join a team working on highly complex, massively scaled software systems, with a strong focus on performance, scalability, reliability, distributed systems, microservices…

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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