Mississauga, On Front end web developer react Jobs – 103 Openings This Week

Senior Software Engineer
CircleCI —Toronto, ON
- $156,000–$196,000 a year
- Call to connect
- Remote
- DevOps
- APIs
Quick apply
RQ00213 - Software Developer - Senior
Source Code —Toronto, ON
- $69.90–$83.89 an hour
- Full-time
- Hybrid work
- Azure
- DevOps
- Java
Quick apply
11d
Sr Full Stack Developer, TD Securities
TD Bank —Toronto, ON
- $126,800–$164,100 a year
- Full-time
- Azure
- Computer Science
- Engineering
- Paid time off
AVP .NET Senior Developer
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Azure
- Oracle
- Computer Science
Senior Software Developer, Digital Development (Télétravail/Hybride)
CBC/Radio-Canada —Toronto, ON
- Full-time
- Remote
- Bilingual
- Computer Science
- English
- Work from home
1d
Senior Full-Stack Developer (Ruby on Rails/React)
Phoenix —Toronto, ON
- $125,000–$155,000 a year
- Full-time
- AWS
- JavaScript
- In-person
- Paid time off
Senior Java Developer
Konrad —Toronto, ON
- $120,000–$145,000 a year
- Hybrid work
- Azure
- Java
- Databases
- Work from home
- Flexible schedule
Quick apply
FTM / IIB Developer-Global High Value Payments Technology
Scotiabank —Toronto, ON
- Azure
- Computer Science
- DevOps
- Tuition reimbursement
Principal Software Engineer - Platform, Identity and BI
Calabrio —Toronto, ON
- On call
- Remote
- DevOps
- Java
- SQL
- Designated paid holidays
- Disability insurance
Quick apply
Technical Lead / Lead Developer
BelWo —Toronto, ON
- Hybrid work
- Azure
- Computer Science
- DevOps
Development Manager
BMO Financial Group —Toronto, ON
- $94,600–$176,000 a year
- Full-time
- Java
- Databases
- AWS
- Tuition reimbursement
- Life insurance
RQ00708 - Senior Quality Assurance Specialist
Source Code —Toronto, ON
- $54.25–$81.37 an hour
- Full-time
- Bilingual
- Azure
- DevOps
Quick apply
Lead Software Engineer (JAVA, API)
Sun Life —Toronto, ON
- $90,000–$140,000 a year
- Weekends as needed
- DevOps
- Java
- SQL
13d
Staff Software Engineer
Okta —Toronto, ON
- $160,000–$220,000 a year
- Hybrid work
- Computer Science
- Bachelor's
- JavaScript
Quick apply
Senior Full Stack Developer
Konrad —Toronto, ON
- $120,000–$145,000 a year
- Hybrid work
- Azure
- AWS
- JavaScript
- Work from home
- Flexible schedule
Quick apply
14d

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RQ00213 - Software Developer - Senior
Source Code —Toronto, ON
Project management principles and practices, including budget and schedule controls, to lead and direct cross functional teams and consultants engaged in…
$69.90–$83.89 an hour
Quick apply
11d

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Full Stack Java Technical Specialist - React.js
HCLTech —Ajax, ON
Contributing in all phases of the development lifecycle. Improve the code quality by implementing best practices.
14d
Principal Front End Engineer
Questrade Financial Group —Toronto, ON
Best Practices & Quality: Establish and govern front-end engineering best practices, including code quality, component libraries, state management, testing…
$130,000–$170,000 a year
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Senior Software Engineer

CircleCI -
Toronto, ON

Quick apply

Job details

$156,000–$196,000 a year

Qualifications

Go
React
Full-stack development
DevOps
APIs
TypeScript

Full job description

About CircleCI Engineering

CI/CD has been solved. Now it's being reinvented. AI agents don't just run pipelines. They write code, trigger builds, interpret failures, and propose fixes. The interfaces that developers use to understand and trust that work don't exist yet. We're building them.

At CircleCI, our guiding principles aren't posters on a wall. We learn fast: we run experiments, accept failure, and scale what works. We think like the customer: every decision connects back to the developer sitting in front of a failing build at 2 am. We own the outcome: not just our slice of it, but the whole thing. If that's how you already work, you'll fit here.

Team-Agnostic Placement

We don't hire for a team. We hire for CircleCI. Where you land depends on where your strengths create the most leverage, and we figure that out together. You might own the CI pipeline experience, deploy and release tooling, notification infrastructure, monetization flows, AI agent surfaces, or the foundational web platform. The through line across all of it is the same: full-stack ownership, a high bar for craft, and work that directly shapes how tens of thousands of developers experience CircleCI every day.

What You'll Do

Build AI-natively. AI is how we work. It's not a productivity layer on top of engineering, but the default starting point for how problems get approached and solved.
Set technical direction. You define the approach others build from. When the problem is complex or the answer isn't obvious, you're the person who leads the design discussion, writes the ADR, and makes the call.
Invent new interfaces. Software delivery is being reinvented. Pipelines run autonomously, generate fixes, and surface results that need human judgment. The tools developers use to understand, trust, and act on that work don't exist yet. You'll define what they look like and establish the patterns the team builds on.
Own the full stack. Build features end-to-end in Go, React, and TypeScript. You don't hand off at a layer boundary. You own the outcome.
Obsess over craft. Reliability and responsiveness are design concerns, not afterthoughts. Care about how the interface holds up when stakes are high and hold your team to that same standard.
Champion observability. Use Honeycomb, Datadog, and Rollbar to understand and improve your systems. Operational data drives stability, not just incident response.
Close gaps and fix the conditions that created them. You'll notice gaps and close them. When a gap reflects something broken in how the team works, you fix that too.

What You'll Bring

AI-native engineering practices. You use AI tools daily and can speak to what you've built, where they changed your approach, and where they fall short.
A track record of shipping. You've built something real and put it in front of users. 5+ years of production full-stack experience, with latency, responsiveness, and reliability treated as design concerns, not afterthoughts.
Full-stack depth. Strong React and TypeScript. Comfortable owning backend services in Go: API design, data modeling, service integration.
System design. You lead architectural decisions on complex systems. You make conscious tradeoffs, document your reasoning, and create the foundation others build on.
Adaptability. You don't just thrive in ambiguity, you reduce it for others. You turn unclear requirements into a direction the team can execute on.
Technical leadership. You mentor engineers, give direct feedback on technical direction, and raise the quality bar through how you engage in reviews and design discussions, not just what you ship.

Sound like you?

You've stopped waiting for AI to mature and are already building with it, not as a productivity trick, but as a core part of how you think about problems. You care about the product as much as the code. You're drawn to work where the patterns don't exist yet and the best answer requires you to invent it. If that's how you already operate, we want to talk.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

About CircleCI

CircleCI is the world's largest continuous integration/continuous delivery (CI/CD) platform, and the hub where code moves from idea to delivery. As one of the most-used DevOps tools - processing more than 3 million jobs a day - CircleCI has unique access to data on how the most effective engineering teams work, and the tools to help software companies successfully leverage the power of AI into their commercial applications. Companies like Hinge, HuggingFace, and Samsung use us to improve engineering team productivity, release better products, and get to market faster.

Founded in 2011 and headquartered in downtown San Francisco with a global, remote workforce, CircleCI is venture-backed by Base10, Greenspring Associates, Eleven Prime, IVP, Sapphire Ventures, Top Tier Capital Partners, Baseline Ventures, Threshold
Ventures, Scale Venture Partners, Owl Rock Capital, Next Equity Partners, Heavybit, and Harrison Metal Capital.

CircleCI is an Equal Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law.

Quick apply

Refine Your Search

front end web developer react jobs in mississauga, on

Senior Software Engineer

RQ00213 - Software Developer - Senior

Sr Full Stack Developer, TD Securities

AVP .NET Senior Developer

Senior Software Developer, Digital Development (Télétravail/Hybride)

Senior Full-Stack Developer (Ruby on Rails/React)

Senior Java Developer

FTM / IIB Developer-Global High Value Payments Technology

Principal Software Engineer - Platform, Identity and BI

Technical Lead / Lead Developer

Development Manager

RQ00708 - Senior Quality Assurance Specialist

Lead Software Engineer (JAVA, API)

Staff Software Engineer

Senior Full Stack Developer

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