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Added 25 days ago
CA
Brand Engineer
Calico AI
Toronto, ON
- Full-time
…be the voice of those customers back to Calico's product and engineering teams, turning what you see in the field into product…
Added 25 days ago
TC
Senior Java Low Latency Developer
Tata Consultancy Services
Mississauga, ON
- $100,000 to $120,000 CAD / year
- Full-time
connectivity and Direct Market Access (DMA) platforms. This role is ideal for a highly skilled
Added 25 days ago
Maintenance Systems & Reliability Lead
Factors Group of Nutritional Companies
Coquitlam, BC · Burnaby, BC · Pitt Meadows, BC
Lead the development, optimization, and ongoing success of our CMMS, ensuring accurate asset data, effective work management, and maintenance system excellence.
Added 25 days ago
eTrading Full Stack Engineering - Network
HSBC Global Services Limited
Toronto, ON
You’ll join the eTrading infrastructure engineering team responsible for resilient deterministic and low-latency network services supporting electronic trading platforms. This hands-on role…
Added 25 days ago
eTrading Full Stack Engineering - Compute
HSBC Global Services Limited
Toronto, ON
Join our eTrading infrastructure engineering team in Markets & Securities Services Information Technology, building deterministic, secure and highly available compute platforms supporting…
Added 25 days ago
V
Senior Quality Management System (QMS) Quality Engineer
VitalBio
Oakville, ON
- Full-time
The Senior Quality Management System (QMS) Quality Engineer is a technical leader responsible for maintaining, improving, and ensuring the effectiveness of the Company's Quality Management…
Added 25 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 25 days ago
N
Enterprise Cloud & Platform Engineer
Numeris
Toronto, ON
- Full-time
…operation of enterprise cloud, network, identity, and telephony platforms. This role will provide technical leadership across Microsoft 365, Azure, AWS, networking, and unified…
Added 25 days ago
DG
Senior Software Developer I
Dahrouge Geological Consulting Ltd.
AB · Edmonton, AB
- Full-time
· Design and document the system architecture for assigned products, recording key decisions and trade-offs.
Added 25 days ago
N
Principal Optical Engineer
Nokia
Ottawa, ON
- Full-time
…NPI, and manufacturing; correlate calibration results with system KPIs (e.g. BER/FEC margin, OSNR tolerance,…
Added 25 days ago
Security Technology Analyst
University of Toronto
Toronto, ON
…operation of security technologies by working with vendor-specific platforms and tools such as firewalls, endpoint detection and response solutions, security information and event…
Added 25 days ago
VC
Senior Temporary Works Inspector H/F
VINCI Construction Grands Projets Hellas S.A.
Toronto, ON · Greater Toronto Area, Canada
- Temporary
…deep-water intake in Lake Ontario to improve the plant's cooling system. This will involve a 1.5 km-long tunnel, built by a pressurized TBM (10.5 m diameter slurry…
Added 25 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 25 days ago
PC
Technical Support Team Lead
Powerhouse Controls Ltd
Cambridge, ON
- Full-time
We bring exceptional technical and engineering experience to the table, but what really sets us apart is an unsurpassed level of passion and commitment. We listen, question, collaborate,…
Added 25 days ago
GD
Internal Communications & Engagement Specialist
General Dynamics Missions System International
Ottawa, ON
- $75,000 to $95,000 CAD / year
- Full-time
At General Dynamics Mission Systems–Canada, we’re not just engineering technology - we’re shaping the future of defence and security. Our teams design and deliver advanced, mission-critical…
Added 25 days ago
Principal Technology Architect
Infosys
Canada
…interface with end-users, IT teams and key stakeholders to gather system requirements. Will also apply technical proficiency across different stages of the software development life cycle…
Added 25 days ago
FF
Safety Systems Analyst
FPS Food Process Solutions Corporation
Richmond, BC
- Full-time
Analyze business requirements, processes and users need to identify opportunities for system enhancements, optimization, and automation.
Added 25 days ago
FF
Safety Systems Analyst
FPS Food Process Solutions Corporation
Charlottetown, PE
- Full-time
Analyze business requirements, processes and users need to identify opportunities for system enhancements, optimization, and automation.
Added 25 days ago
NT
C# / C++ Developpeur (Real Time expert)
Nöord Technologies
Montreal, QC
- Full-time
System Design & Performance: Proven aptitude for system design, code profiling, memory/performance tuning, and debugging in production environments.
Added 25 days ago
AI
Staff Engineer
Atlantis IT Group
Toronto, ON
- Contract
Build Gen AI system frameworks, Prompt Engineering, including designing and refining prompts to optimize LLM outputs, implementing Gen AI systems into production.
Added 25 days ago
T
Senior Mongo DBA
TD
Mississauga, ON
- Full-time
…support, maintenance, and optimization of enterprise database platforms including Microsoft SQL Server and MongoDB. This role focuses on reliable production operations, incident resolution,…
Added 25 days ago
FB
Sr. System Administrator
FGF Brands
Toronto, ON · Greater Toronto Area, Canada
- Full-time
…FGF’s IT Network, Server and Storage infrastructure and the platforms and software applications running on them. The IT Infrastructure team is accountable for the performance and…
Added 25 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 25 days ago
M
I&IT Data Scientist I
Metrolinx
Toronto, ON
- Full-time
…Transit and UP Express, as well as the PRESTO fare payment system. We are also building new and improved rapid transit, including GO Expansion, Light Rail Transit routes, and major…
Added 25 days ago
VA
Chief Systems Engineer
Volatus Aerospace
Mirabel, QC
- Full-time
Demonstrated experience owning system architecture and requirements management for complex platforms

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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