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Added 30 mins ago
Senior Data Engineer
Style Analytics
Montreal, QC
Full-time
We’re looking for a Senior Data Engineer to help design and deliver scalable data solutions that power decision-making across the organization. In this role, you’ll take ownership of key…
Added 1 hour ago
Lead Data Engineer
National Bank of Canada
Montreal, QC
Full-time
A career as a Senior Developer in Data Engineering on the Financial crime and regulatory projects team at National Bank means serving as a Data Analytics Specialist. This position allows…
Added 1 hour ago
Senior Data Engineer - Zonda - Toronto, Ontario
CoStar
Toronto, ON
$120,000 to $150,000 CAD / year
Full-time
The Senior Data Engineer is responsible for designing, building, and operating reliable, scalable data pipelines and data products across a modern cloud data platform.
Added 1 hour ago
Senior Data Platform Engineer - Zonda - Toronto, Ontario
CoStar
Toronto, ON
$140,000 to $170,000 CAD / year
Full-time
We are looking for a Senior Data Platform Engineer to design, automate, and operate the shared capabilities that underpin our enterprise data platform.
Added 1 hour ago
Senior Data Quality Engineer - Zonda - Toronto, Ontario
CoStar
Toronto, ON
$120,000 to $150,000 CAD / year
Full-time
We are looking for a Senior Data Quality Engineer to build and operate the testing and validation capabilities that ensure data delivered through our enterprise data platform is accurate,…
Added 5 hours ago
Senior Engineer - ServiceNow Development
TJX Canada – Winners, Marshalls, HomeSense
Mississauga, ON
$87,780 to $122,892 CAD / year
Full-time
We’re looking for a Senior Engineer - ServiceNow Development to play a key role in designing and delivering innovative ServiceNow solutions that enhance service management processes and…
Added 7 hours ago
BUSINESS MANAGEMENT ANALYST
City of Toronto
Toronto, ON
…We’ll rely on you to document, map, analyze, design and re-engineer business processes to improve efficiency of operations and programs, and conduct feasibility studies and financial…
Added 7 hours ago
Lead Full-Stack GenAI Developer (Contractor)
KData AI
Toronto, ON
Full-time
Seniority & Experience: Proven track record as a Senior or Lead Engineer personally contributing code to production-deployed GenAI systems.
Added 8 hours ago
AI Engineer Intern
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Vancouver, BC
Temporary
As a Software Engineer with expertise in AI/ML systems and platform development, you will help create a scalable AI Platform.
Added 8 hours ago
Director - Enterprise Data Warehouse and Data Platforms
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Full-time
Serve as a senior client facing advisor for enterprise data warehouse, data engineering, analytics, and data platform modernization initiatives within a complex telecommunications…
Added 10 hours ago
Senior Specialist - Architecture
LTM
ON · Ontario, Canada
$120,000 to $140,000 USD / year
Full-time
Microsoft Certified Fabric Analytics Engineer Associate DP600
Added 10 hours ago
Senior Security Detection Engineer (Global Security)
RBC
Toronto, ON
Full-time
The role of the Senior Security Detection Engineer is to provide specialized subject matter expertise for the Detection Engineering & Automation (DEA) team, for RBC's Global Cyber Security.…
Added 11 hours ago
Senior Software Engineer
7shifts
Toronto, ON
Full-time
As a Senior Software Developer, Mid-Market at 7shifts, you'll be one of the founding engineers on our mid-market squad - the team responsible for building the foundational systems that…
Added 11 hours ago
Software Engineer
7shifts
Toronto, ON
Full-time
Collaborate with senior engineers, your product counterpart, and the data team to translate requirements into pragmatic, maintainable solutions
Added 12 hours ago
Senior Engineer
Aptino, Inc.
Canada
Contract
We are looking for a Senior Software Engineer / Big Data Engineer with strong hands-on experience in Apache Spark, Spark SQL, Python, and Scala.
Added 12 hours ago
Software Tester
VySystems
Canada
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We are seeking a Senior Data Engineer with strong Quality Engineering (SDET) experience. The role is primarily focused on building and validating data solutions using Databricks, Python,…
Added 12 hours ago
Senior Data Engineer, Analytics
nesto
Vancouver, BC
Full-time
…origination and underwriting to servicing, securitization, mortgage analytics, and market intelligence. Backed by decades of experience and a reputation for innovation, we help clients…
Added 12 hours ago
Senior Data Engineer, Analytics
nesto
Vancouver, BC
Full-time
…origination and underwriting to servicing, securitization, mortgage analytics, and market intelligence. Backed by decades of experience and a reputation for innovation, we help clients…
Added 13 hours ago
Sr. Full Stack Developer, TD Securities
TD
Toronto, ON
Full-time
We are looking for a Senior Engineer to join the Equity Derivatives Technology Team and embrace a broad range of tasks associated with developing application and systems solutions to…
Added 13 hours ago
Senior Data Engineer
Tubi - Canada
Toronto, ON
As a Senior Data Engineer at Tubi, you'll be instrumental in developing and maintaining robust data processing pipelines that underpin our reporting, analytics, and performance insights.…
Added 13 hours ago
Business Systems Engineer Intern, Finance Technology (Summer 2027)
Lyft
Toronto, ON
$40 to $43 CAD / hour
We are seeking a motivated, technical student to join our Corporate FinTech team as a Business Systems Engineer Intern. This internship offers hands-on experience supporting the full suite…
Added 14 hours ago
Senior Software Engineer
Autodesk
Toronto, ON · AMER - Canada - Ontario - Toronto - University Ave
Full-time
…native, scalable, and developer-friendly systems that power analytics, AI, real-time insights, and customer-facing experiences across…
Added 14 hours ago
Platform Engineer
Hays
Toronto, ON
Contract
We are seeking a highly skilled Senior/Lead Platform Engineer with strong expertise in Azure, Databricks, Python, PySpark, and Spark SQL to design, develop, and support scalable cloud-based…
Added 14 hours ago
Data Pipeline QA
Insight Global
Toronto, ON
$50 to $65 CAD / hour
Contract
Insight Global is looking for a Senior QA Automation Engineer to join a high-performing team focused on data pipeline validation and reporting quality. This individual will be responsible…
Added 14 hours ago
Senior Java Software Engineer (Backend / Systems-Focused)
Collabera
Toronto, ON
$90 to $95 CAD / hour
Contract
Title: Senior Java Software Engineer (Backend / Systems-Focused)

Collabera

Senior Java Software Engineer (Backend / Systems-Focused)

Toronto, ON, Canada

Pay: $90 to $95 CAD / hour
Job type: Contract
Apply by: Oct 28, 2026
Experience: 8-10+ years of experience as a Java Backend Engineer
Working hours: 37.5 hours/week
Posting language: English
Posted: Sep 28, 2026

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Original job description

Title: Senior Java Software Engineer (Backend / Systems-Focused)

Type: 6-Month Contract (with possibility to extend)

Location: Toronto, ON - Mon-Thurs Onsite (4 days/week), 37.5 hours/week

Start Date: ASAP

Interview Process: Approx. 2 rounds - 1 technical deep dive + 1 onsite/team fit

Compensation: $90-$95/Hour

Day-to-Day Responsibilities:

The Senior Java Engineer will focus on designing and building scalable backend systems while driving modernization efforts across a complex application landscape.
A significant portion of the role involves analyzing, decomposing, and re-architecting legacy systems, including migrating workloads to AWS (EC2, RDS) and improving overall system performance, reliability, and maintainability.
They will build services responsible for data ingestion, transformation, validation, and distribution, working with data-heavy workflows (including market data).
The engineer will also play a key role in system design and architecture, making pragmatic tradeoffs (e.g., scalability vs simplicity) and ensuring solutions are production-ready.
Additional responsibilities include troubleshooting complex production issues (e.g., memory leaks, concurrency issues, latency bottlenecks), implementing observability practices (logging, metrics, tracing), and building resilient systems (retries, failure handling, circuit breakers).
The remaining portion of the role includes collaborating with engineers and stakeholders, helping clarify ambiguous requirements, shaping solutions, and providing technical leadership through code reviews and mentorship.

Must-Haves:

8-10+ years of experience as a Java Backend Engineer
Strong expertise in Core Java (collections, concurrency, JVM internals, memory model)
Experience with performance tuning, garbage collection, and profiling
Hands-on experience with Spring (Boot, MVC, Data) and Hibernate/JPA
Strong system design and distributed systems knowledge (caching, messaging, eventual consistency)
Experience with AWS or cloud-based architectures
Strong SQL and data handling experience
Proven ability to troubleshoot complex production issues
Experience building systems beyond simple CRUD APIs (data pipelines, processing systems, etc.)
Ability to operate in ambiguity and define solutions—not just execute tasks

Pluses:

Experience with data-intensive systems or data pipelines
Exposure to microservices architecture (Spring ecosystem)
Background in capital markets / financial services
Experience modernizing or replacing legacy systems at scale
Familiarity with CI/CD pipelines and DevOps practices

We may use AI-enabled and/or automated tools to support parts of our recruitment process, including application screening, interview scheduling, and candidate communications. These tools are used to enhance consistency and efficiency. All hiring decisions involve human review and are not based solely on automated processing.

The Company offers a total rewards package in accordance with all applicable federal, provincial, and local laws and requirements. Benefit eligibility and offerings vary based on role, employment status, and work location. For contractor positions, benefits are limited to those entitlements and protections required by applicable law, which may include (as applicable) vacation pay, public holidays, leaves of absence, and other legally mandated benefits or payments.

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More about this job

Responsibilities

Design and build scalable backend systems, modernize and re-architect legacy applications, and migrate workloads to AWS. Develop data ingestion and processing services, improve performance and reliability, troubleshoot production issues, implement observability and resilience practices, and provide technical leadership through collaboration, code reviews, and mentorship.

Requirements

Requires 8–10+ years of Java backend engineering experience, strong Core Java and JVM expertise, and hands-on experience with Spring, Hibernate/JPA, SQL, AWS, and distributed systems. Candidates must be able to tune performance, resolve complex production issues, build systems beyond basic CRUD APIs, and define solutions amid ambiguity.

Skills

Java
Core Java
Concurrency
JVM Internals
Performance Tuning
Garbage Collection
Profiling
Spring Boot
Spring MVC
Spring Data
Hibernate
JPA
System Design
Distributed Systems
AWS
SQL

Visa sponsorship

Not detected in the job text

Keywords

Java
Core Java
Spring Boot
Spring MVC
Spring Data
Hibernate
JPA
AWS
EC2
RDS
SQL
JVM Internals
Concurrency
Memory Model
Garbage Collection
Performance Tuning
Profiling
System Design
Distributed Systems
Caching
Messaging
Eventual Consistency
Data Pipelines
Data Ingestion
Market Data
Microservices
Legacy System Modernization
Observability
CI/CD
DevOps

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