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Added 2 days ago
Senior Java Software Engineer
Experis Canada
Montreal, QC
Contract
We are looking for a Custom Software Engineer / Development Lead with strong experience in Java, Spring Boot, Microservices, REST APIs, Kafka, and AWS. The successful candidate will lead…
Added 2 days ago
Team Lead, Senior Fullstack Engineer
Arcadia
Toronto, ON
$160,000 to $220,000 CAD / year
Full-time
Strong backend experience with Java / Spring Boot or comparable stacks
Added 2 days ago
Senior Java Software Engineer
Maarut Inc
Quebec, QC
Contract
Senior Java Developer – AWS | Spring | Microservices
Added 2 days ago
Software Engineer
PlanIT Search
Markham, ON
Contract
The ideal candidate is a hands-on engineer with strong experience in Java, Spring Boot, Oracle, REST APIs, and enterprise application development, along with exposure to modern web…
Added 2 days ago
Full Stack Engineer
VStream Labs Inc.
Toronto, ON
$60 to $70 CAD / hour
Contract
Develop Java/JEE services with Spring Boot 2.5+, Angular 2+, HTML5, RESTful APIs, and relational databases.
Added 2 days ago
Senior Software Developer
isgSearch
Toronto, ON · Greater Toronto Area, Canada
Full-time
Senior Software Developer (Java / Spring Boot)
Added 2 days ago
Java Software Developer
ZAPCOM GROUP INC
Toronto, ON
Full-time
Backend development using Java/Spring Boot or Python (Django/FastAPI/Flask)
Added 2 days ago
Java Software Engineer
Tekshapers
Mississauga, ON
Full-time
Added 3 days ago
Developer Java, Spring, AWS
Maarut
Longueuil, QC
Contract
Java, Spring, and AWS code to tackle technical debt and fix vulnerabilities,
Added 3 days ago
Senior Data Engineer
Royal Bank of Canada
Toronto, ON
Full-time
Experience in building Kotlin, Spring boot and Java applications.
Added 4 days ago
Senior Data Engineer
RBC
Toronto, ON
Full-time
Experience in building Kotlin, Spring boot and Java applications.
Added 3 days ago
Software Developer - Java/Mobile
CGI
Vancouver, BC
Full-time
2.5+ years developing enterprise Java applications using Java, Spring Boot, Spring Framework, J2EE technologies, and associated build/deployment tools such as Maven and Tomcat.
Added 4 days ago
Full Stack Engineering - Securities Financing
HSBC
Toronto, ON
Full-time
Build backend services using core Java (Java 17 or 21) with Spring Boot or Spring Framework
Added 3 days ago
Senior Java Backend Developer
TSR Consulting
Mississauga, ON
$70 to $75 CAD / hour
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 3 days ago
Senior Software Developer
Royal Bank of Canada
Toronto, ON
Full-time
Experience developing secure server side services leveraging the following APIs: Spring, Spring Boot, Spark, Scala, RESTful Webservices, Apache Data Utilities (JSON, Avro, CSV/PSV,…
Added 3 days ago
Senior Developer Engineer/Leader
Xcelerated Consulting Group, LLC.
Montreal, QC
Contract
Full-Stack Technical Execution: Architect and develop robust, scalable applications utilizing Java, JEE, Spring, Hibernate, and Oracle, integrating seamless RESTful Web Services and…
Added 3 days ago
Java Full Stack Software Developer
J&M Group
Toronto, ON
Full-time
Java/JEE technology with Spring Boot version 2.5 or higher
Added 4 days ago
Intermediate Software Developer
Best Buy Canada
Newmarket, ON
Full-time
Hands-on experience with back-end development demonstrating proficiency with core development languages such as Java (J2EE, Spring Boot)
Added 3 days ago
Senior Java Developer
K&K Global Talent Solutions INC.
Mississauga, ON
Full-time
We’re hiring a Senior Java Developer to design, build, and operate enterprise-grade microservices with strong expertise in Spring Boot, Kafka, and MongoDB on Open Shift/AWS.
Added 3 days ago
Spark Scala Java Developer
Pacer Group
Toronto, ON
$55 to $60 CAD / hour
Contract
Experience with CI/CD, Helios, Spring Boot Web Services, and SQL.
Added 4 days ago
Senior Software Developer
RBC
Toronto, ON
Full-time
Experience developing secure server side services leveraging the following APIs: Spring, Spring Boot, Spark, Scala, RESTful Webservices, Apache Data Utilities (JSON, Avro, CSV/PSV,…
Added 4 days ago
Sr. Software Engineer - Fullstack
eBay
Toronto, ON
Full-time
Strong programming skills in a backend language such as Java, Kotlin, C#, Python, Go, or similar.
Added 3 days ago
Full Stack Engineer
Zapcom Group Inc
Toronto, ON
$90,000 to $110,000 CAD / year
Full-time
Looking for Sr full stack developers 8+ year's experience who needs to have core Java, Spring boot skills on backend and JavaScript and React skills on frontend.
Added 4 days ago
Full Stack Developer
Royal Bank of Canada
Toronto, ON
Full-time
We are seeking a skilled Full Stack Developer to design, build, and maintain scalable web applications. You will work on both front-end and back-end components using Angular, Java Spring…
Added 3 days ago
Spark Scala Java Developer
Pacer Group
Toronto, ON
$60 to $62 CAD / hour
Contract
Proficient in Scala and Java programming.Hands-on experience with Apache Spark (Core| SQL| DataFrames| Datasets).Familiarity with Maven for build and dependency management.Experience with…

TSR Consulting

Senior Java Backend Developer

Mississauga, ON, Canada

Pay: $70 to $75 CAD / hour
Job type: Contract
Apply by: Oct 17, 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: Sep 17, 2026

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Original job description

Job Title: Senior Java Backend Developer

Location: Mississauga, ON (Hybrid 3 days/week)

Duration: Contract - 6 months

About TSR

TSR is a trusted staffing and workforce solutions partner with more than 50 years of experience delivery highly qualified talent to support clients' most critical business and technology initiatives. Through a disciplined approach to sourcing, candidate vetting, and delivery, TSR helps organizations scale teams quickly while maintaining quality and reliability. TSR operates with a global delivery model, leveraging specialized teams to support enterprise clients across North America and beyond.

In June 2024, TSR was acquired by Justin Christian, founder and CEO of BCforward, a global provider of professional services and workforce solutions. This partnership expands TSR's ability to deliver broader capabilities, global delivery resources, and enhanced opportunities for both clients and consultants.

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

The role involves designing, building, and optimizing high-performance backend applications for batch and real-time data processing. You will lead technical implementation, drive architecture, and mentor other engineers while ensuring code quality and system scalability.

Requirements

Candidates must have 8+ years of professional experience in Java-based backend architectures and deep expertise in Core Java, concurrency, and distributed systems. Proficiency in the Spring ecosystem, data streaming frameworks, and database management is required.

Skills

Core Java
Spring Boot
Apache Kafka
Apache Spark
Distributed Systems
Multithreading
JVM Performance Tuning
SQL
NoSQL
Docker
Kubernetes
CI/CD
Test-Driven Development
RESTful APIs
gRPC
Hibernate

Visa sponsorship

Not detected in the job text

Keywords

Java 11
Java 17
Java 21
Spring Cloud
Spring Data
Spring Security
PostgreSQL
MySQL
Oracle
Cassandra
MongoDB
Redis
Flink
Hadoop
Jenkins
GitLab CI
GitHub Actions
JUnit
Mockito
ETL
Microservices
Event-driven
Garbage collection
Heap analysis
Infrastructure-as-code

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