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Mid Level Front End Developer Jobs in Toronto, ON

VitalBio

Jr./Mid- Level Recruiter- Technicians

Oakville, ON · On-site

CA$60K - CA$85K/yr

Comfort working in a fast-paced, collaborative, evolving environment with a high level of ownership ... Our global team of experts spans chemistry, software, engineering, and microfluidics. We thrive on ...

Virtusa

Senior Python Developer

Mississauga, ON · On-site

... junior and mid-level engineers Collaborate with product, DevOps, QA, and architecture teams Optimize performance, scalability, and reliability of applications Troubleshoot and resolve complex ...

Virtusa

Senior Python Developer

Mississauga, ON · On-site

... junior and mid-level engineers Collaborate with product, DevOps, QA, and architecture teams Optimize performance, scalability, and reliability of applications Troubleshoot and resolve complex ...

Virtusa

React JS Developer

Mississauga, ON · On-site

... programming Experience with Git/version control systems Understanding of frontend build tools ... of frontend development experience (adjustable based on role level) Soft Skills Strong ...

Ritchie Bros.

Staff Software Engineer

Mississauga, ON · On-site

Mentor senior and mid-level engineers through design reviews, code reviews, and hands-on technical ... Familiarity with front-end modernization (e.g., React) as part of full-stack initiatives. IAA ...

SS&C

Lead Software Developer

Mississauga, ON · Hybrid

CA$95K - CA$140K/yr

Provide technical guidance, code reviews, and mentorship to mid-level and junior engineers. Help upskill the team and foster a culture of technical excellence. * Cross-functional collaboration: Work ...

Profound Medical

Software Developer

Mississauga, ON · On-site

CA$100K - CA$125K/yr

Independently solves mid-level problems; analyzes software issues effectively. * Collaborates across teams; contributes to project goals and supports junior developers. * Moderate autonomy in ...

Profound Medical

Software Developer

Mississauga, ON · On-site

Independently solves mid-level problems; analyzes software issues effectively. * Collaborates across teams; contributes to project goals and supports junior developers. * Moderate autonomy in ...

Rumble

Senior Back-End Developer

Toronto, ON

CA$135K - CA$154K/yr

The role also includes maintaining and modernizing legacy code, integrating front-end components ... The actual salary offered varies depending on the candidate's skill level and experience. This ...

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All JobsMid Level Front End Developer JobsMid Level Front End Developer Jobs in Toronto, ON

Mid Level Front End Developer information

What are the key skills and qualifications needed to thrive in the mid level front end developer position, and why are they important?

To thrive as a Mid Level Front End Developer, you need solid proficiency in HTML, CSS, JavaScript, and modern frameworks like React or Angular, typically supported by a relevant degree or practical experience. Familiarity with version control systems like Git, responsive design tools, and optionally certifications such as Microsoft Certified: JavaScript Developer add value. Strong collaboration, problem-solving abilities, and effective communication distinguish top performers in this field. These skills ensure that you can build user-friendly, high-quality web interfaces and work efficiently within cross-functional teams.

What are some typical daily responsibilities for a mid level front end developer?

Mid Level Front End Developers spend much of their day coding and refining user interfaces based on project requirements and feedback from stakeholders. They regularly collaborate with designers and back-end developers to ensure seamless integration of visual and functional elements, as well as participate in code reviews to maintain high quality standards. Additionally, they often troubleshoot bugs, optimize page performance, and keep up with the latest web technologies to improve user experience. This role blends both independent problem-solving and teamwork in a dynamic, fast-paced setting.

What is a mid level front end developer?

A Mid Level Front End Developer is responsible for building and optimizing the user interface of web applications using HTML, CSS, and JavaScript frameworks like React or Vue. They collaborate with designers and back-end developers to ensure a seamless user experience. Typically, they have 2-5 years of experience and are expected to write clean, maintainable code while troubleshooting UI/UX issues. Additionally, they may contribute to component libraries, improve performance, and follow best practices in responsive design and accessibility.

What are the most commonly searched types of Front End Developer jobs in Toronto, ON? The most popular types of Front End Developer jobs in Toronto, ON are:
What are popular job titles related to Mid Level Front End Developer jobs in Toronto, ON? For Mid Level Front End Developer jobs in Toronto, ON, the most frequently searched job titles are:
What job categories do people searching Mid Level Front End Developer jobs in Toronto, ON look for? The top searched job categories for Mid Level Front End Developer jobs in Toronto, ON are:
Mid Level Front End Developer jobs near you
Infographic showing various Mid Level Front End Developer job openings in Toronto, ON as of July 2026, with employment types broken down into 76% Full Time, 19% Part Time, 1% Temporary, and 4% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution.

Senior Full Stack Software Engineer

Kraft Heinz

Toronto, ON • Hybrid

Full-time

Posted 25 days ago

Kraft Heinz rating

7.0

Company rating: 7.0 out of 10

Based on 122 frontline employees who took The Breakroom Quiz

231st of 436 rated food and drinks producers

Job description

Job Description

Senior Full Stack Software Engineer at a glance...

Location: Toronto, ON

Hybrid: 3 days/week

We'rehiring a Senior Full Stack Software Engineer to join one of our product engineering pods, building and evolving features end-to-end across frontend and backend systems.You'llpartner closely with product managers, designers, and other engineers to ship high-quality, reliable software that directly affects user experience and product outcomes.This role is hands-on and highly collaborative - the ability to communicate clearly, present technical decisions, and align cross-functional partners is as important as the code you write.

What's on the menu?

Product Development

  • Design and implement end-to-end product features across frontend and backend

  • Build responsive, performant user interfaces using React (TypeScript)

  • Develop scalable APIs and backend services using Python (FastAPI)

  • Translate product requirements into clean, maintainable code

System Design & Implementation

  • Contribute to application architecture and technical design decisions

  • Ensure code quality, performance, and scalability of services

  • Work with relational databases - data modeling, schema, and migrations

  • Integrate with internal and external APIs

Quality & Delivery

  • Write unit and integration tests to ensure reliability

  • Participate in code reviews and uphold engineering standards

  • Contribute to CI/CD workflows and deployment processes

  • Troubleshoot, debug, and resolve production issues

Collaboration & Communication

  • Partner with product managers and designers to refine requirements and shape solutions

  • Communicate technical trade-offs and risks clearly to both technical and non-technical stakeholders

  • Present technical designs, approaches, and post-mortems in team forums and reviews

  • Mentor junior and mid-level engineers; share knowledge across the pod

  • Participate actively in sprint planning, stand-ups, retrospectives, and other team routines

Recipe for Success - apply now if this sounds like you!

  • 5+ years of experience in software engineering

  • Strong hands-on experience with:

  • JavaScript / TypeScript (React)

  • Python (FastAPI)

  • RESTful API design and backend development

  • SQL and database design

  • Experience building and shipping production-grade applications

  • Experience working with cloud platforms (Azure preferred)

  • Strong understanding of modern software engineering practices

  • Ability to work independently and take ownership in a product-focused team

  • Communication & Soft Skills:

  • Excellent written and verbal communication skills in English - fluent professionalproficiencyrequired

  • Confident presenting technical concepts, trade-offs, and decisions to engineers, product managers, and senior stakeholders

  • Strong active-listening and stakeholder-management skills; able to navigate ambiguity and align partners around solutions

  • Comfortable giving and receiving constructive feedback in code reviews, design discussions, and retrospectives

  • Collaborative, low-ego, and pragmatic - prioritizes team and product outcomes over individual preference

  • Experience with automated testing and CI/CD pipelinespreferred

  • Performance optimization experiencepreferred

  • Experience with observability toolingpreferred

  • Experience working in Agile environmentspreferred

  • Experience mentoring engineers or leading technical discussions preferred

Location(s)Toronto - Queen's Quay - Headquarters

Kraft Heinz is an Equal Opportunity Employer - Underrepresented Ethnic Minority Groups/Women/Veterans/Individuals with Disabilities/Sexual Orientation/Gender Identity and other protected classes.

What Kraft Heinz employees say

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Benefits

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