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Added 1 hour ago
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Java Full Stack Lead
Accenture
Mississauga, ON
- Full-time
A Full Stack Engineer with strong expertise in Java, Spring Boot, Angular, AWS Cloud, and DevOps practices, along with experience delivering and supporting enterprise applications across…
Added 6 hours ago
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Senior Electrical Engineer, Data Centers
AECOM
Markham, ON
- $125,000 to $175,000 CAD / year
- Full-time
AECOM is seeking a Senior Electrical Engineer to join our growing Canadian Data Center team.
Added 6 hours ago
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Senior Mechanical Engineer, Data Centers
AECOM
Markham, ON
- $125,000 to $175,000 CAD / year
- Full-time
AECOM is seeking a Senior Mechanical Engineer, to join our growing Canadian Data Center team.
Added 6 hours ago
FH
Lead, Health Informatics
Fraser Health
Surrey, BC
- Full-time
The Virtual Infrastructure team at Fraser Health is looking for a Cloud Engineer to join our team. This role plans, designs, implements, and supports secure and reliable cloud solutions.…
Added 9 hours ago
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Customer Experience Engineer / M365
Microsoft
Toronto, ON
- Full-time
Lead and contribute your ideas and innovation to various M365 Service Improvement Programs and initiatives to advance our collective capabilities
Added 10 hours ago
IC
Frontend Developer
IT Connex
Toronto, ON
- Contract
The ideal candidate is a hands-on senior engineer with strong React and JavaScript expertise, experience building enterprise-scale applications, and the ability to lead technical…
Added 11 hours ago
CS
Inside Sales Representative
Certified Sales and Rentals
Saskatoon, SK
- Full-time
Work closely with the Parts Technician and Lead Service Writer to support accurate and timely customer invoicing
Added 12 hours ago
DC
Coordinator, Construction Services (Electrical)
Defence Construction Canada
Happy Valley-Goose Bay, NL
- Full-time
Are you an electrical engineer? Join our team in Goose Bay and contribute to the delivery of essential infrastructure projects!
Added 13 hours ago
KS
Engineering Manager - Industrial Automation & Power Systems
Kinetic Search Group
Vancouver, BC · Greater Vancouver Metropolitan Area
- $170,000 to $190,000 CAD / year
- Full-time
We are seeking an accomplished Engineering Manager to lead and further develop a multidisciplinary engineering team specializing in electrical power systems, industrial automation, and…
Added 14 hours ago
T
Software Engineer III
TD
Toronto, ON
- Full-time
As a lead software engineer, you are accountable for shaping and delivering end-to-end solutions for enterprise-grade platforms and complex initiatives. You set technical direction, define…
Added 14 hours ago
Software Engineer 3, Identity and Access Management
MongoDB
Toronto, ON
…organizations of all sizes to easily build, scale, and run modern applications by helping them modernize legacy workloads, embrace innovation, and unleash AI. Our industry-leading developer…
Added 14 hours ago
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Mechanical Engineer
SearchLabs
Markham, ON
- $100,000 to $125,000 CAD / year
- Full-time
Our client is a real estate management and facilities service company. They provide efficient building solutions across diverse industries. They enhance operational efficiency and implement…
Added 15 hours ago
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Lead, Forward Deployed Engineering
Deliverect
Toronto, ON
- Full-time
As the Lead Forward Deployed Engineer for North America, you will bridge technical problem-solving and software engineering by owning enterprise adoption from pre-sales architecture to…
Added 15 hours ago
Unified Customer Experience - Consultant - Senior Full Stack Engineer
Questrade Financial Group
Calgary, AB
The Senior Software Engineer leads the technical design and delivery of complex, high-performance features across Questrade's products, spanning front-end applications (React Native,…
Added 16 hours ago
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Product Development Engineer
Johnson Electric
Mississauga, ON · Canada - PM Mississauga (General)
- Full-time
Join Our Team as a Product Development Engineer at Johnson Electric!
Added 16 hours ago
BE
Transformer Engineer
Beaver Electrical Machinery Ltd.
Burnaby, BC
- Full-time
We are seeking an experienced Transformer Design, Redesign & Repair Engineer to lead technical redesigns, apparatus remanufacturing specifications, diagnostic evaluations, and commissioning…
Added 16 hours ago
K
Section Manager, Software Design Engineering
Kinectrics
Toronto, ON
- Full-time
Kinectrics is seeking a Section Manager, Software Design Engineering to lead a team delivering advanced software and digital control system solutions for nuclear and critical infrastructure…
Added 16 hours ago
Operating Engineer B (3rd Class)
University of Toronto
Toronto, ON
Under the direction of the Manager, Mechanical Operations and Maintenance and/or leadership of the Lead Hand Engineer, the incumbent is responsible for the operation and maintenance in the…
Added 16 hours ago
Principal Product Manager - Billing & Platform
Constant Contact
ON
Lead the Move to Stripe: Own our migration from an in-house billing system to Stripe Billing, including phasing, success metrics, testing, cutover and sign-off. Deliver a seamless…
Added 17 hours ago
KS
Data Engineer
Kumaran Systems
Toronto, ON
- Full-time
Lead and execute on-premises to Azure cloud migrations for data platforms, ETL workflows, and applications.
Added 17 hours ago
System Architect - Krembil Centre for Neuroinformatics
CAMH
Toronto, ON
…reporting, population needs assessment, program evaluation, and service infrastructure analysis - all while ensuring that each partner network retains ownership and control of its own data.…
Added 18 hours ago
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Mechanical Engineer
CIMA+
Edmonton, AB · Calgary, Alberta
- $110,480 to $151,910 CAD / year
- Full-time
…With a constant desire to offer our clients the best possible service, we have set up a team of specialists dedicated to high-performance projects to support our clients and design teams…
Added 18 hours ago
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Lead Middleware Platform Engineer (contract)
Capgemini
Montreal, QC
- Contract
We are looking for a Lead Middleware Platform Engineer to lead the design, implementation, automation, and operationalization of a next-generation data and RDF platform for a global…
Added 18 hours ago
IG
Project Engineering
IMT Group
Ingersoll, ON
- $79,400 to $115,900 CAD / year
- Full-time
Elevate your expertise with IMT Precision! We are recruiting for Project Engineer – Manufacturing Integration to join our team and contribute to the delivery of essential manufacturing…
Added 18 hours ago
SM
RQ11740 – DevOps/Cloud Engineer – Senior
S M Software Solutions Inc
Toronto, ON
- Internship
We are seeking a Senior DevOps/Cloud Engineer with extensive experience in Microsoft Azure, CI/CD pipelines, deployment automation, infrastructure as code, cloud operations, and enterprise…

IT Connex

Frontend Developer

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 26, 2026
Posting language: English
Posted: Oct 27, 2026

Original job description

Senior Software Engineer – React / JavaScript

Location: Toronto, ON

Work Arrangement: Hybrid – 3 days per week onsite

Experience: 10+ years

Job Overview

We are seeking an experienced Senior Software Engineer with strong expertise in React, JavaScript, and modern web application development to join a team responsible for building and enhancing a large-scale Fixed Income trade processing platform.

The platform supports global trading operations across derivatives, cash products, exotics, and securities financing transactions. It processes approximately 200,000 transactions daily and provides real-time position and risk management capabilities.

In this role, you will contribute to the evolution of a next-generation trading application, focusing on modern UI/UX engineering, service-oriented architecture, automated CI/CD pipelines, and improvements to system performance, scalability, and reliability.

Key Responsibilities

Design, develop, and maintain robust, scalable, and testable web applications using React, JavaScript, HTML5, and Node.js.
Collaborate with cross-functional teams to integrate application functionality and deliver new products and process improvements.
Lead technical design and implementation, ensuring solutions align with enterprise architecture standards.
Analyze complex business and system processes to identify issues and develop innovative technical solutions.
Improve application performance, scalability, reliability, and testability through effective engineering practices.
Contribute to the transition toward smaller, modular services and fully automated CI/CD pipelines.
Establish and promote standards for coding, testing, debugging, and deployment.
Identify and implement system enhancements that improve operational efficiency and time to market.
Assess and manage technical and operational risks while ensuring compliance with applicable policies and controls.
Provide technical guidance and mentorship to mid-level developers and analysts, including coordinating development activities when required.

Required Skills and Qualifications

8+ years of experience in software application development.
Strong hands-on experience with React, JavaScript, and HTML5.
Experience with Node.js and modern web development concepts.
Strong understanding of application architecture, system integration, and software design principles.
Experience developing high-quality, testable code and troubleshooting complex application issues.
Knowledge of performance optimization, scalability, reliability, and non-functional requirements.
Experience working in large, collaborative development environments.
Familiarity with automated testing, CI/CD pipelines, and modern software delivery practices.
Demonstrated technical leadership, problem-solving, and mentoring skills.
Ability to manage competing priorities and adapt to changing business requirements.

Nice to Have

Experience with Fixed Income products, trading platforms, or capital markets applications.
Knowledge of C# and the .NET Framework.
Experience with derivatives, cash products, or securities financing transactions.
Exposure to service-oriented or microservices architectures.

Education

Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
Master’s degree is preferred.

Ideal Candidate

The ideal candidate is a hands-on senior engineer with strong React and JavaScript expertise, experience building enterprise-scale applications, and the ability to lead technical implementation. Experience in financial services or Fixed Income trading platforms is an advantage.

Please note: This role requires working onsite in Toronto three days per week.

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More about this job

Responsibilities

Design, develop, and maintain scalable React and JavaScript applications for a large-scale fixed-income trade processing platform, while improving performance, reliability, and testability. Lead technical implementation, promote engineering and delivery standards, support modular services and automated CI/CD, and mentor developers and analysts.

Requirements

Requires 8+ years of software application development experience, strong hands-on React, JavaScript, and HTML5 skills, and experience with Node.js, architecture, integration, testing, and complex troubleshooting. Candidates should demonstrate technical leadership, mentoring, and collaboration skills; a bachelor's degree or equivalent experience is required, and a master's degree is preferred.

Skills

React
JavaScript
HTML5
Node.js
Application Architecture
System Integration
Software Design
Performance Optimization
Scalability
Automated Testing
CI/CD
Technical Leadership
Mentoring
Service-Oriented Architecture
Microservices
Fixed Income Trading

Visa sponsorship

Not detected in the job text

Keywords

React
JavaScript
HTML5
Node.js
C#
.NET Framework
Fixed Income
Trade Processing
Trading Platforms
Capital Markets
Derivatives
Cash Products
Securities Financing
Application Architecture
System Integration
Software Design
Service-Oriented Architecture
Microservices
CI/CD Pipelines
Automated Testing
Performance Optimization
Scalability
Reliability
Non-Functional Requirements
Technical Leadership
Mentoring
Enterprise Applications
Risk Management
Toronto

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