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Senior Full Stack Developer Jobs in Markham, ON (NOW HIRING)

1Valet

Senior Full-Stack Developer

Toronto, ON · Remote

Senior Full-Stack Developer Location: Ottawa, ON (Remote) About the Role We are looking for a Senior Full-Stack Developer to join one of our development squads and help build new features for the ...

Flinks

Senior Full-Stack Developer

Toronto, ON · Remote

  • Medical

  • Dental

  • PTO

The Role We're hiring Senior Full-Stack Developers to build and own the client-facing product experiences at Flinks. You'll work across the Angular/TypeScript front end and the C#/.NET back end, ...

Konrad

Senior Full Stack Developer

Toronto, ON · Hybrid

CA$120K - CA$145K/yr

  • Medical

  • Retirement

About The Role As a Senior Full Stack Developer you'll be tasked with working on web application development. Working within the software development team, your duties will require you to assist in ...

Konrad

Senior Full Stack Developer

Toronto, ON · Hybrid

CA$120K - CA$145K/yr

  • Medical

  • Retirement

About The Role As a Senior Full Stack Developer you'll be tasked with working on web application development. Working within the software development team, your duties will require you to assist in ...

CIBC

Sr. Full Stack Developer

Toronto, ON · Hybrid

To learn more about CIBC, please visit CIBC.com What you'll be doing Join our Core Banking and Payments Technology team as a Sr. Full Stack Developer, where you'll play a crucial role in delivering ...

New

CIBC US

Sr. Full Stack Developer

Toronto, ON · Hybrid

To learn more about CIBC, please visit CIBC.com What you'll be doing Join our Core Banking and Payments Technology team as a Sr. Full Stack Developer, where you'll play a crucial role in delivering ...

Priceline

Senior Full-Stack Developer

Toronto, ON · Hybrid

CA$140K - CA$160K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Full-Stack Engineer (Applied AI) Our Technology team is the backbone of our company: constantly creating, testing, learning and iterating to better meet the needs of our customers. If you ...

Moneris

Senior Full Stack Developer

Toronto, ON · On-site +1

CA$100K - CA$142K/yr

  • Medical

  • Retirement

  • PTO

Senior Full Stack Developer Design and build secure, scalable backend services, integrations, and content-driven frontends that unify SaaS platforms, enterprise systems, and AI capabilities into ...

Priceline.com LLC

Senior Full-Stack Developer

Toronto, ON · Hybrid

CA$140K - CA$160K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Full-Stack Engineer (Applied AI) Our Technology team is the backbone of our company: constantly creating, testing, learning and iterating to better meet the needs of our customers. If you ...

Quartermaster Inc.

Senior Full Stack Developer

Toronto, ON

CA$150K - CA$190K/yr

  • Medical

  • Dental

  • PTO

ROLE SALARY BAND $150,000 - $190,000 ROLE OVERVIEW The Senior Full stack Developer is a key contributor responsible for delivering high-quality, scalable software across the frontend and backend.

Chubb

Senior Full Stack Engineer

Toronto, ON

Senior Full-Stack Engineer, AI Platform The Opportunity Chubb's AI Platform team is building an enterprise AI platform that powers RAG-based search, document intelligence, and AI-assisted workflows ...

Invictus Direct

Senior Full Stack Engineer

Toronto, ON · Remote

$125K - $155K/yr

  • PTO

Description: Our client is seeking a Senior Full-Stack Engineer to play a key role in designing ... Continuously improve application performance, developer workflows, and engineering best practices ...

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Senior Full Stack Developer information

What is the difference between Senior Full Stack Developer vs Backend Developer?

AspectSenior Full Stack DeveloperBackend Developer
Required SkillsProficiency in both frontend and backend technologies, such as JavaScript, HTML, CSS, and server-side languages like Node.js, Python, or JavaSpecialized in server-side development, working with languages like Java, Python, Ruby, or PHP, and database management
Work EnvironmentCollaborates across frontend and backend teams, often involved in full project lifecycleFocuses primarily on backend systems, APIs, and database integration
Common UsageUsed in roles requiring full project oversight and versatile development skillsUsed in roles focused on server-side logic, database management, and API development

The main difference is that a Senior Full Stack Developer handles both frontend and backend development, providing a comprehensive approach to projects, while a Backend Developer specializes solely in server-side logic and database management. Both roles require strong programming skills, but the Full Stack Developer's expertise spans the entire technology stack.

How does a senior full stack developer typically collaborate with cross-functional teams during a project lifecycle?

As a Senior Full Stack Developer, you'll frequently collaborate with designers, product managers, QA engineers, and other developers to deliver end-to-end solutions. You'll be involved in requirements discussions, offer technical guidance, and help align frontend and backend development with business goals. Your role often includes code reviews, mentoring junior team members, and ensuring seamless integration across various systems. This collaborative environment encourages knowledge sharing and innovation while ensuring project success.

What are the key skills and qualifications needed to thrive as a senior full stack developer, and why are they important?

To thrive as a Senior Full Stack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, usually supported by a relevant degree and several years of experience. Mastery of tools such as Git, Docker, CI/CD systems, and cloud platforms like AWS or Azure is typically required, alongside familiarity with databases and version control systems. Strong problem-solving abilities, leadership, effective communication, and collaboration skills set exceptional developers apart. These skills and qualities are crucial for delivering robust, scalable solutions while mentoring teams and efficiently bridging gaps between client requirements and technical implementation.

What is a senior full stack developer?

Senior Full Stack Developers are experienced professionals who design, develop, and maintain both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to handle servers, databases, APIs, and user interfaces. In addition to coding, they often lead development teams, make architectural decisions, and ensure software quality and scalability. Their expertise allows them to oversee the entire application lifecycle, from concept to deployment.

What are the most commonly searched types of Full Stack Developer jobs in Markham, ON?

The most popular types of Full Stack Developer jobs in Markham, ON are:

What cities near Markham, ON are hiring for Senior Full Stack Developer jobs?

Cities near Markham, ON with the most Senior Full Stack Developer job openings:

Senior Full Stack Developer jobs near you
Infographic showing various Senior Full Stack Developer job openings in Markham, ON as of August 2026, with employment types broken down into 1% Internship, 88% Full Time, 5% Part Time, 5% Contract, and 1% Nights. Highlights an 84% Physical, 6% Hybrid, and 10% Remote job distribution.

Senior Full-Stack Developer

1Valet

Toronto, ON • Remote

Full-time

Re-posted 11 days ago

Job description

Senior Full-Stack Developer


Location: Ottawa, ON (Remote)


About the Role


We are looking for a Senior Full-Stack Developer to join one of our development squads and help build new features for the 1VALET smart-building platform. This role is hands-on and product-focused, working across the stack - from Angular front-end experiences to .NET backend services - and includes integrations with hardware and third-party vendors (smart locks, entry systems, building systems, etc.). You'll collaborate closely with Product, Hardware, QA, and Operations teams to deliver scalable, reliable features used in live residential and commercial buildings.


What You'll Do


Design, build, and maintain end-to-end features across front-end, backend, and data layers

Develop and optimize Angular front-end applications with a focus on performance and usability

Build .NET (C#) backend services, APIs, and integrations

Work with MS/Azure SQL for data modelling, querying, and performance optimization

Use Elasticsearch for search, analytics, and log-driven features

Implement and maintain hardware and vendor integrations (IoT devices, access control systems, third-party APIs)

Collaborate with Product Managers to translate requirements into technical solutions

Work with QA to ensure high quality through testing, debugging, and production support

Participate in architectural discussions and contribute to technical direction

Support and improve existing systems while helping shape new platform capabilities


What You Bring


6+ years of professional experience as a Full-Stack Developer

Strong hands-on experience with:


Angular

.NET / C# (Web APIs, services)

MS/Azure SQL (schema design, performance tuning)

Elasticsearch


Experience designing and consuming REST APIs

Exposure to hardware / IoT integrations or complex third-party system integrations (strong asset)

Solid understanding of scalable, distributed systems

Experience working in Agile / squad-based teams

Strong problem-solving skills and ability to work independently in a remote environment

Clear communication skills and a collaborative mindset

Experience using AI-assisted development tools (e.g., Replit AI, Claude Code, GitHub Copilot) to improve productivity, code quality, debugging, or prototyping


Nice to Have


Experience with cloud platforms (Azure)

Knowledge of message queues, event-driven systems, or real-time data flows

Prior experience in PropTech, IoT, or building management systems

Experience supporting production systems used by real customers in the field


Why Join 1VALET


Work on real-world systems deployed in buildings across North America

Be part of a platform that blends software, hardware, and operations

High ownership, meaningful technical challenges, and visible impact

Collaborative, product-driven engineering culture

Remote role with a strong Ottawa-based engineering presence


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