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Added 3 mins ago
Senior Conveyance Engineer – Civil Engineering
WSP in Canada
Toronto, ON
Full-time
…that communities rely on every day. As a Senior Conveyance Engineer, you will lead the planning, design, and delivery of municipal water, wastewater, and stormwater infrastructure projects…
Added 3 mins ago
Lead Conveyance Engineer - Civil Engineering
WSP in Canada
Toronto, ON
Full-time
…communities across Ontario and Canada. As a Lead Conveyance Engineer, you will provide technical leadership on complex municipal water, wastewater, and stormwater conveyance projects while…
Added 3 mins ago
SYSTEMS ENGINEER
Design Electronics
Niagara Falls, ON
Full-time
Reporting to the Chief Design Officer, the Systems Design Engineer will be the technical expert responsible for pre-sales, design/build, sales support, and quality assurance.
Added 3 mins ago
Junior Process Engineer Metallurgy (0 to 5 years)
BBA Consultants
Rouyn-Noranda, QC
Full-time
Work with a team of skilled engineers, designers and project support staff under the supervision of a senior engineer
Added 3 mins ago
Principal Conveyance Engineer - Civil Engineering
WSP in Canada
Toronto, ON
Full-time
…infrastructure that helps communities thrive. As a Principal Conveyance Engineer, you'll provide technical leadership on complex conveyance projects across Ontario and Canada, guiding…
Added 3 mins ago
Senior Consultant
Revay and Associates Limited
Toronto, ON
Full-time
…is essential for this role. Registration as a professional engineer with the Professional Engineers Ontario (PEO) or the ability to register would be an…
Added 3 mins ago
Senior Specialist - Architecture
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ON · Ontario, Canada
$120,000 to $140,000 USD / year
Full-time
Microsoft Certified Fabric Analytics Engineer Associate DP600
Added 3 mins ago
Senior Tritium Engineer
Kinectrics
Toronto, ON
Full-time
…discipline. A Master's degree or Ph.D. is preferred. A Professional Engineer (P.Eng.) designation, or eligibility for registration with a recognized professional engineering body, is an…
Added 3 mins ago
Rolling Stock Engineer
SYSTRA Canada
Montreal, QC
Full-time
The Rolling Stock Engineer will act as technical lead for rolling stock studies, procurement and maintenance projects as well as for rolling stock maintenance facilities design and…
Added 3 mins ago
AV Service Engineer - Control Systems & Device Integration
evertz.io
Burlington, ON
Internship
Evertz AV is looking for a Service Engineer to join our AV Service team with a specific focus on Control System customization and deployment with a specific focus on , our software-defined…
Added 4 mins ago
Support Engineer
Firecrawl
Toronto, ON
$166,000 to $218,000 USD / year
Full-time
We're looking for a hands-on Support Engineer to make sure our customers succeed with Firecrawl, and to build the systems that let a small team support a fast-growing customer base. You'll…
Added 18 mins ago
Coordonnateur de projet
Soletanche Freyssinet
Vancouver, BC
Full-time
Geotechnical knowledge, junior engineer level
Added 18 mins ago
Principal Sales Systems Engineer
Jobgether
Canada
Full-time
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Sales Systems Engineer based in Canada.
Added 33 mins ago
Manager Plant Maintenance
Carleton University
Ottawa, ON
Other
Reporting to the Chief Operating Engineer (COE)/Manager, Plant Operations, the Manager, Plant Maintenance is responsible for planning and oversite of all maintenance activities to ensure…
Added 33 mins ago
Principal Process Engineer
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Edmonton, AB · Calgary, AB
Full-time
We are currently recruiting for a Lead Process Engineer (SAGD) to join our team of world-class experts and project leaders. The successful candidate will provide technical leadership and…
Added 33 mins ago
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Toronto, ON
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Senior Security Detection Engineer (Global Security)
RBC
Toronto, ON
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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 48 mins ago
Moncton Building Systems Operator (2068) PCN 1000787
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Must hold a valid 4th class power engineer’s license in accordance with the Boiler and Pressure Vessel Act or any equivalent combination of training and experience.
Added 48 mins ago
Director, Fire Protection Engineering - Eastern Canada
AtkinsRéalis
Montreal, QC
Full-time
Licensed Professional Engineer (P.Eng.) and member in good standing of the Ordre des ingénieurs du Québec (OIQ).
Added 48 mins ago
Senior FEA Engineer
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Stoney Creek, NB
Full-time
Freudenberg Flow Technologies is seeking a skilled and self-directed Finite Element Analysis (FEA) Engineer to join our Stoney Creek site engineering team. Reporting directly to the Site…
Added 48 mins ago
Full Stack Engineer - Long term care applications
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Brampton, ON
Contract
Role Description The Full Stack Engineer for long-term care applications is a full-time, on-site role based in Brampton, ON. This role is responsible for designing, developing, and…
Added 48 mins ago
Senior Engineer, Power Transformer Services
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Contract
Position: Senior Engineer, Power Transformer Services
Added 49 mins ago
Enterprise Account Executive - Montreal
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Prepare effective presentations with support from the Sales Engineer.
Added 49 mins ago
Structures (CAE) Engineer
Multimatic
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The Analysis Department at MTC is currently seeking a Structures (CAE) Engineer. Note that this position is not remote-based; the candidate needs to work onsite at our Markham location.…

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

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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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