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Senior Full Stack Software Engineer Jobs in Ontario

Manulife

Senior Full Stack Software Engineer

Toronto, ON · Hybrid

CA$113K - CA$163K/yr

We're seeking a Senior Full-Stack Engineer with strong software engineering expertise and experience in derivatives trading systems. In this role, you'll design, develop, and support scalable, cloud ...

RideCo

Senior Full Stack Software Engineer

Waterloo, ON · Hybrid

CA$120K - CA$140K/yr

As a Senior Full Stack Developer at RideCo, you will play a key role in shaping the architecture ... Degree in Computer Science, Software Engineering, or a related discipline. * 5+ years of ...

Adaria Vending Services Limited

Full Stack Software Engineer Adaria Technology Innovations - Concord, ON (On-site) Adaria Technology Innovations is looking for a Full Stack Software Engineer to join our growing team in Concord ...

Manulife

Senior Software Engineer (Full-Stack)

Toronto, ON · Hybrid

CA$113K - CA$163K/yr

We are seeking an engineering expert and an execution-focused senior full-stack software engineer to accelerate our AI & Innovation efforts within the Digital Technologies group in Wealth & Asset ...

SalesJack

Senior Software Engineer

Toronto, ON · On-site

$90 - $120/hr

Senior Full Stack Software Engineer Location: Onsite in Toronto, ON About SalesJack SalesJack is a fast-growing, profitable sales software platform (CRM, Prospecting Service) purpose-built for ...

SalesJack

Senior Software Engineer

Hamilton, ON · On-site

$100 - $120/hr

Senior Full Stack Software Engineer Location: Onsite in Toronto, ON About SalesJack SalesJack is a fast-growing, profitable sales software platform (CRM, Prospecting Service) purpose-built for ...

PHD Solutions Inc

Be Seen First

Full Stack Software Developer

Burlington, ON · On-site

CA$75K - CA$100K/yr

Full-Stack Software Developer Location Burlington, Ontario (on-site, majority of time in office ... You will work within a small, experienced team alongside two senior developers, with direct access ...

US Mobile

Full-Stack Software Engineer

Toronto, ON · On-site +1

CA$130K - CA$160K/yr

As a Full-Stack Software Engineer, you will: * Work on developing and deploying exciting new features * Advise on technologies and present solutions to the team * Take on legacy architecture and ...

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Senior Full Stack Software Engineer information

See Ontario salary details

$71.5K

$135.6K

$181.5K

How much do senior full stack software engineer jobs pay per year?

As of Jul 19, 2026, the average yearly pay for senior full stack software engineer in Ontario is $135,587.00, according to ZipRecruiter salary data. Most workers in this role earn between $118,500.00 and $152,500.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Senior Full Stack Software Engineer position, and why are they important?

To thrive as a Senior Full Stack Software Engineer, you need deep expertise in both front-end and back-end development, strong problem-solving abilities, and a solid foundation in computer science principles, typically demonstrated by a bachelor’s or master’s degree in a related field. Familiarity with frameworks and languages like React, Angular, Node.js, Python, and proficiency in using cloud platforms, version control systems like Git, and continuous integration tools is crucial, and relevant certifications are an advantage. Exceptional communication, leadership, and teamwork skills help you effectively coordinate with cross-functional teams and mentor junior engineers. These skills ensure you can deliver robust, scalable solutions while driving project success and fostering a collaborative development environment.

What does a typical workday look like for a Senior Full Stack Software Engineer?

A typical day for a Senior Full Stack Software Engineer involves designing and implementing new features, reviewing and improving code, and collaborating with product managers, designers, and other developers to deliver project goals. You might split your time between writing code for both front-end and back-end systems, participating in daily stand-up meetings, and providing technical guidance to junior team members. The role often requires balancing hands-on development with architectural planning and problem-solving for complex technical challenges. You’ll also frequently interact with stakeholders to gather requirements and provide updates, ensuring alignment throughout the software development lifecycle.

What is a Senior Full Stack Software Engineer job?

A Senior Full Stack Software Engineer is an experienced developer responsible for designing, building, and maintaining both front-end and back-end systems in web or software applications. They work with a variety of technologies, frameworks, and databases to ensure seamless functionality across the entire software stack. In addition to coding, they often provide technical leadership, mentor junior developers, and contribute to architectural decisions. Their role requires strong problem-solving skills, an understanding of best practices, and the ability to collaborate with cross-functional teams to deliver high-quality software solutions.

What are the most commonly searched types of Full Stack Software Engineer jobs in Ontario? The most popular types of Full Stack Software Engineer jobs in Ontario are:
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Senior Full Stack Software Engineer jobs near you
Senior Full Stack Software Engineer

Senior Full Stack Software Engineer

Kraft Heinz

Toronto, ON • Hybrid

Full-time

Posted 3 days ago

New

Kraft Heinz rating

7.0

Company rating: 7.0 out of 10

Based on 122 frontline employees who took The Breakroom Quiz

212th of 397 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.

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