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Added 9 mins ago
CI
Quality Engineer – Integration & Automation -- KUMDC6055252
Compunnel Inc.
Toronto, ON
- $65 to $70 CAD / hour
- Contract
End-to-end data validation across integrated source systems and front-end API (UI) contracts
Added 9 mins ago
PI
Senior RF Engineer – Electromagnetic Design & Simulation
Photonic Inc.
Coquitlam, BC
- $117,000 to $161,000 CAD / year
- Full-time
We are looking for a Senior RF Engineer to join our hardware team and own the electromagnetic design, simulation, and validation of on-chip and chip-scale RF structures that deliver control…
Added 25 mins ago
S
Senior Project Manager/ Technical Lead, Conveyance
Stantec
Toronto, ON
- Full-time
…Tasks will include technical data compilation / assessment / validation, specification development, technical report writing, cost estimation and engineering calculations. Project…
Added 25 mins ago
GT
Operations and Project Coordinator
GeoSpectrum Technologies, Inc
Port Coquitlam, BC
- Full-time
Manage project administration tasks such as product logistics coordination, shipment tracking, report validation, progress reporting, and documentation throughout the project lifecycle.
Added 25 mins ago
A
Senior SDET
Air-tek
Toronto, ON
- Full-time
We’re looking for a Senior Software Development Engineer in Test (SDET) to build and improve the infrastructure that makes reliable, scalable testing possible.
Added 39 mins ago
M
Business Systems Analyst
Manulife
Toronto, ON · Waterloo, ON
- Full-time
…requirements analysis and solution design through implementation and validation. You will be part of a collaborative Agile team where we solve complex problems and continuously look for…
Added 39 mins ago
M
Associate Applied AI Engineer – GenAI Systems
Manulife
Toronto, ON
- Full-time
Engineer features from structured and unstructured data and help ensure solutions remain robust as data evolves.
Added 39 mins ago
IC
GPU Validation Engineer
Intel Corporation
Toronto, ON · CAN - - Toronto
- Full-time
We are seeking a skilled and experienced GPU Validation Engineer to join our dynamic team. This role requires regular onsite presence to effectively collaborate with cross-functional teams…
Added 39 mins ago
A
Instrumentation & Monitoring Quality Assurance Lead
Arcadis
Vancouver, BC
- Full-time
…When amber or red triggers emerge, you will lead a disciplined validation process - testing notifications against raw data, nearby instruments, recent construction activities, weather…
Added 39 mins ago
VT
EMC Engineer
Veridian Tech Solutions, Inc.
Quebec, QC
- Contract
Added 1 hour ago
VT
Senior Hydro-mechanical Engineer
Veridian Tech Solutions, Inc.
Toronto, ON
- Contract
Participate in design reviews and validation activities
Added 1 hour ago
GC
HIL Commissioning Engineer
Global Connect Technologies
Windsor, ON
- Full-time
We are seeking an experienced HIL Commissioning Engineer to support automotive engineering projects for Stellantis through Cognizant. The ideal candidate will have hands-on experience with…
Added 1 hour ago
WC
Ingénieur en test et conception mécanique / Test & Mechanical Engineer
Wabtec Corporation
Montreal, QC
- Full-time
…la conception, l’adaptation, le prototypage, les tests et la validation de produits électromécaniques complexes; pour les contrats OEM et de services avec les constructeurs ferroviaires les…
Added 1 hour ago
GC
HIL Validation Engineer
Global Connect Technologies
Windsor, ON
- Full-time
Perform system-level testing and validation of automotive embedded control systems.
Added 1 hour ago
AC
Pharmaceutical Facility Project Manager/Engineer
ALTEN Canada
Mississauga, ON
- $90,000 to $95,000 CAD / year
- Full-time
We are seeking a detail-oriented and proactive Facilities Engineer/ Pharmaceutical Construction PM with strong project management experience in a GMP-regulated environment. In this role,…
Added 1 hour ago
H
Manufacturing Engineer
Hexagon
Calgary, AB
- Full-time
Hexagon’s Autonomous Solutions Division is looking for a Manufacturing Engineer to join a global leader in engineering and technology, committed to developing innovative solutions that…
Added 1 hour ago
H
Senior Prototype Engineer
Humanoid
Burnaby, BC
- Full-time
We are looking for a Senior Prototype Engineer to drive the development, assembly, integration, and validation of advanced humanoid robotic systems, with a particular focus on robotic…
Added 2 hours ago
FL
Senior Software Engineer - .NET, C# & APIs
Flexkube Lab Inc.
Toronto, ON · Greater Toronto Area, Canada
- Contract
We are looking for an experienced, hands-on engineer who brings strong backend development capabilities, an understanding of modern frontend frameworks, and experience delivering secure,…
Added 2 hours ago
FT
Power Electronics Engineer
Foreseeson Technology
Richmond, BC
- Contract
Foreseeson is seeking a Power Electronics Engineer to develop, evaluate, integrate, and validate the power conversion architecture required for the ESS prototype and its future commercial…
Added 2 hours ago
FT
Embedded Systems Engineer
Foreseeson Technology
Richmond, BC
- Contract
The Embedded Systems Engineer will develop the firmware and embedded software that enables communication, control, monitoring, and coordination across the ESS. This role will work closely…
Added 2 hours ago
M
Sr. AI/ML Engineer, RAIB
McKesson
Mississauga, ON
- Full-time
…scalable, and responsible AI solutions. We are seeking a Sr. AI/ML Engineer, RAIB to lead the development, evaluation, governance, and operationalization of machine learning and Generative…
Added 2 hours ago
AD
Cybersecurity Detection Engineer / Purple Team
act digital
Montreal, QC · Greater Montreal Metropolitan Area
- Full-time
We are currently looking for a Detection Engineer to join a major financial-sector environment in Montreal.
Added 2 hours ago
CI
Principal Architect
Camis Inc
Guelph, ON
- Full-time
Prototype and validate architectural approaches where hands-on technical validation is required.
Added 2 hours ago
G
Senior Quality Assurance Automation Engineer
GryphTech
Mississauga, ON
- Full-time
We are looking for a QA Engineer to join our quality assurance team and help us validate high-quality, reliable web applications.
Added 2 hours ago
FG
Tool Design Engineer
Freudenberg Group
Tillsonburg, ON
- Full-time

Flexkube Lab Inc.

Senior Software Engineer - .NET, C# & APIs

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 25, 2026
Experience: 8+ years of professional software engineering experience, with strong hands-on development expertise in C# and .NET.
Posting language: English
Posted: Oct 26, 2026

Original job description

In this role, you will design, develop, modernize, and maintain enterprise applications and APIs that support business-critical solutions for our clients.

We are looking for an experienced, hands-on engineer who brings strong backend development capabilities, an understanding of modern frontend frameworks, and experience delivering secure, scalable, and reliable software.

You will collaborate with cross-functional engineering teams, contribute to technical design decisions, and leverage modern development practices, including AI-assisted engineering tools, to improve software quality and delivery efficiency.

Why This Role Is Open

We are currently hiring for this role due to an existing or newly created vacancy within our organization. This position is open as part of our ongoing business needs, and we are actively reviewing applications to fill this role with a qualified candidate who can make an immediate impact.

What You’ll Do

Design, develop, and maintain scalable backend services and enterprise applications using C#, .NET, ASP.NET Core, and SQL Server.
Build, enhance, and integrate secure RESTful APIs, including authentication, authorization, data validation, and error handling.
Contribute to the modernization of existing applications, including refactoring legacy code, improving performance, and enhancing system reliability.
Work across the application stack, collaborating on frontend development using React, Angular, or similar JavaScript/TypeScript frameworks.
Apply secure coding principles and API security practices, including OAuth2, JWT, and common application security standards.
Participate in technical design discussions, code reviews, automated testing, troubleshooting, and performance optimization.
Support CI/CD pipelines, containerized deployments, and development workflows using tools such as Docker.
Collaborate with engineers, product teams, and quality specialists to deliver high-quality solutions in Agile environments.
Leverage AI-assisted development tools responsibly to support coding, testing, debugging, and documentation while maintaining security and engineering standards.
Share technical knowledge and contribute to continuous improvements in development practices and software quality.

What We’re Looking For

8+ years of professional software engineering experience, with strong hands-on development expertise in C# and .NET.
Solid experience building and maintaining applications using ASP.NET Core, Web API, and RESTful services.
Strong understanding of backend architecture, API design, system integrations, and object-oriented programming principles.
Experience working with SQL Server or comparable relational databases, including data access technologies such as Entity Framework Core or Dapper.
Experience with modern frontend development using React, Angular, or similar JavaScript/TypeScript frameworks.
Understanding of application security principles, including authentication, authorization, OAuth2, JWT, and secure coding practices.
Experience working with Git, code reviews, automated testing, CI/CD pipelines, and Agile software delivery.
Strong problem-solving and troubleshooting skills, with the ability to investigate and resolve complex technical issues.
Ability to collaborate effectively with cross-functional teams and communicate technical concepts clearly.

Bonus Points For

Experience modernizing legacy .NET applications or migrating enterprise systems to modern architectures.
Exposure to Azure or AWS cloud environments, Docker, Kubernetes, or cloud deployment troubleshooting.
Experience with performance optimization, application monitoring, and production support.
Familiarity with accessibility standards such as WCAG or AODA.
Experience with Snowflake, data warehouses, or enterprise data integrations.
Experience with Tailwind CSS, shadcn/ui, or other modern frontend component libraries.
Experience using AI-assisted software development tools such as GitHub Copilot, ChatGPT, or other AI-powered coding and testing solutions.
Experience mentoring developers, contributing to technical documentation, or improving engineering standards.

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More about this job

Responsibilities

Design, develop, modernize, and maintain enterprise applications and secure, scalable APIs using C#, .NET, ASP.NET Core, and SQL Server. Collaborate across engineering and product teams on frontend work, security, testing, CI/CD, troubleshooting, performance improvements, and responsible use of AI-assisted development tools.

Requirements

Requires 8+ years of software engineering experience and strong hands-on expertise in C# and .NET, including ASP.NET Core, Web API, RESTful services, backend architecture, and relational databases. Candidates should also have frontend framework experience, knowledge of application security, and experience with Git, code reviews, automated testing, CI/CD, and Agile delivery.

Skills

C#
.NET
ASP.NET Core
RESTful APIs
SQL Server
Entity Framework Core
Dapper
React
Angular
OAuth2
JWT
Docker
CI/CD
Automated Testing
Agile
Application Security

Visa sponsorship

Not detected in the job text

Keywords

C#
.NET
ASP.NET Core
Web API
RESTful APIs
SQL Server
Entity Framework Core
Dapper
React
Angular
JavaScript
TypeScript
OAuth2
JWT
Git
Code Reviews
Automated Testing
CI/CD
Docker
Kubernetes
Azure
AWS
Agile
Legacy Application Modernization
Performance Optimization
Application Monitoring
Snowflake
WCAG
Tailwind CSS
GitHub Copilot

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