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Startup Software Developer Jobs in Ontario (NOW HIRING)

Friendlier

Lead Software Developer

Guelph, ON · On-site +1

Lead Software Developer Location: Remote (Candidate must reside in Canada) Hiring Range: $100,000 ... Proven track record of success in a startup or scale up environment * Strong technical leadership ...

Borrowell

Software Developer

Toronto, ON · On-site +1

As a Software Developer on Borrowell's Engineering team, you will design, develop, optimize, test ... Experience in fast-paced Fintech or startup environments. Our Engineering Team Values * We work ...

7shifts

Senior Software Developer

Toronto, ON

CA$130K - CA$180K/yr

As a Senior Software Developer at 7shifts, you'll join our Growth squad, where the focus is on ... Founding or early experience at a startup This role is part of an existing vacancy and is part of ...

Fortive

Senior Software Developer

Mississauga, ON · On-site +1

As a Senior Software Developer , you'll play a key role in designing and building high-performing ... We are a global industrial technology innovator with a startup spirit. Our forward-looking ...

Propel Holdings

Sr. Software Developer

Toronto, ON · On-site

CA$110K - CA$135K/yr

About You: As a fast-growing fintech, we stay true to our startup roots. You picture yourself ... Continuously improve the quality of software through reviews, testing and refactoring * Manage and ...

Propel Holdings

Sr. Software Developer

Toronto, ON · On-site

CA$110K - CA$135K/yr

About You: As a fast-growing fintech, we stay true to our startup roots. You picture yourself ... Continuously improve the quality of software through reviews, testing and refactoring * Manage and ...

Signal 1

Senior Software Engineer

Toronto, ON · On-site

$100 - $120/hr

Director of Software Engineering Signal 1 helps health systems accelerate AI adoption with a ... Signal 1 is a 30-person, well-funded and rapidly growing startup with strong product market fit and ...

Rockstar

Software Engineer

Toronto, ON

Rockstar is recruiting for an early-stage, well-funded startup that is transforming how enterprise ... The founding team brings deep experience from both finance and engineering, having overseen finance ...

StackandCo

\n \n \n \n \n Java\/Fullstack Engineer required for a startup in Waterford who are expanding the ... as a Software Developer, ideally in a JVM environment \n * AWS experience would be highly ...

Slice

Staff Software Developer, Services

Ottawa, ON · Remote

What You'll Do As a Staff Software Developer on our Services team, you will immerse yourself in our ... Obstacles energize you, and you thrive in a fast-paced, ambiguous startup environment where your ...

New

ITS Global

Fullstack Developer

Toronto, ON · On-site

We are small, but fast-growing startup, building custom blockchain-based digital identity and ... We are looking for a person with the following skillset: 5+ years of software design and ...

Clockwork.io

CA$180K - CA$260K/yr

About the Role We are looking for a Lead Software Engineer to drive the architecture, development ... A strong sense of ownership and the ability to lead in a fast-paced startup environment * Strong ...

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Showing results 1-20

All JobsStartup Software Developer JobsStartup Software Developer Jobs in Ontario

Startup Software Developer information

See Ontario salary details

$20.5K

$95.7K

$163.5K

How much do startup software developer jobs pay per year?

As of Jul 29, 2026, the average yearly pay for startup software developer in Ontario is $95,683.00, according to ZipRecruiter salary data. Most workers in this role earn between $60,500.00 and $124,000.00 per year, depending on experience, location, and employer.

What does a Startup Software Developer do?

A Startup Software Developer is responsible for designing, developing, testing, and maintaining software applications in a fast-paced startup environment. Their work often involves working closely with founders and small teams to build products from the ground up, rapidly iterating based on user feedback. They may handle a variety of tasks beyond coding, such as participating in product discussions, troubleshooting issues, and sometimes even contributing to deployment and infrastructure decisions. Flexibility, adaptability, and a willingness to learn new technologies are crucial in this role. The job often requires balancing speed with quality while adapting to the evolving needs of the startup.

What are some unique challenges faced by software developers working at startups compared to larger companies?

Startup software developers often encounter a fast-paced and dynamic work environment where priorities can shift rapidly as the business evolves. Unlike larger companies with well-defined processes and teams, startup developers may need to wear multiple hats, handle a broader range of tasks, and take full ownership of projects from ideation to deployment. This can be both challenging and rewarding, as it requires adaptability, strong problem-solving skills, and the ability to work independently while collaborating closely with a small, cross-functional team. The learning curve can be steep, but it offers excellent opportunities for growth and making a visible impact.

What are the key skills and qualifications needed to thrive as a Startup Software Developer, and why are they important?

To thrive as a Startup Software Developer, you need strong programming skills, experience with full-stack development, and a solid understanding of software engineering principles, usually supported by a degree in computer science or related fields. Familiarity with agile project management tools, version control systems like Git, and modern frameworks such as React or Node.js is highly valued. Adaptability, creativity, and effective communication are essential soft skills for navigating rapidly changing requirements and collaborating in small, dynamic teams. These skills and qualities are crucial for delivering innovative solutions quickly and driving success in the fast-paced startup environment.

What is the difference between Startup Software Developer vs Software Engineer?

AspectStartup Software DeveloperSoftware Engineer
CredentialsTypically requires a bachelor's degree in CS or related fieldUsually requires a bachelor's or higher in CS or related field
Work EnvironmentFast-paced, dynamic startup settingVaries from corporate to tech firms, often structured
Industry UsageCommon in startups and small tech companiesWidespread across industries and company sizes
Job FocusBuilding new products, rapid development, versatile rolesDesigning, developing, testing software systems

Startup Software Developers and Software Engineers share similar educational backgrounds and work in tech environments, but Startup Software Developers often work in fast-paced, flexible roles focused on building new products in startup settings. Software Engineers may work in more structured environments with broader industry applications.

What are the most commonly searched types of Startup Software Developer jobs in Ontario? The most popular types of Startup Software Developer jobs in Ontario are:
Startup Software Developer jobs near you
Infographic showing various Startup Software Developer job openings in Ontario as of July 2026, with employment types broken down into 100% Full Time. Highlights an 49% In-person, 13% Hybrid, and 38% Remote job distribution, with an average salary of $95,683 per year, or $46 per hour.
Senior Software Engineer / Software Developer (React Native)

Senior Software Engineer / Software Developer (React Native)

PlayStation Global

Waterloo, ON • On-site

Other

Posted 4 days ago

Job description

Senior Software Engineer / Software Developer (React Native) 

Build what's next for players.

We're a startup inside Sony PlayStation. Fast-moving, experimental, and highly ambitious. Backed by the scale, resources, and trust of Sony Interactive Entertainment. We're building new mobile and web experiences that help gamers connect, discover, and play together in better ways. This is a rare opportunity to design at startup speed and drive huge impact inside the largest gaming company in the world.

We are seeking a Senior Software Engineer / Software Developer specializing in React Native and high-performance frontend development for mobile platforms. In this role, you will define the architecture, frameworks, and technical best practices.

You will collaborate closely with engineers, product, and design teams to deliver best-in-class user interfaces that are performant, accessible, and delightful at scale. As a Senior Engineer, you will provide technical leadership across teams, mentor engineers, and push the boundaries of what's possible in cross-platform frontend development.

Responsibilities

  • Define and evolve the frontend architecture for client applications on mobile using React Native and modern JavaScript/TypeScript.
  • Drive performance optimizations and best practices for rendering, startup time, and UI responsiveness.
  • Design and integrate custom native modules (Native Android or Native iOS) and optimize cross-platform interoperability.
  • Partner with product managers, designers, and researchers to translate user experience requirements into elegant, maintainable solutions.
  • Establish coding standards, testing strategies, and development patterns that raise the quality bar for frontend engineering.
  • Mentor engineers and act as a multiplier for frontend development expertise across the broader team.
  • Investigate new frontend technologies, frameworks, and performance techniques, and guide their adoption when appropriate.
  • Represent frontend/OS needs in technical and architectural discussions.

Requirements

  • 5+ years of software development experience, with significant experience building React Native apps or high-performance JavaScript/TypeScript applications.
  • BS/MS degree in Computer Science or equivalent.
  • Expertise in native Android development (Kotlin/Java/Gradle) and shipping applications to the Google Play Store.
  • Strong expertise in frontend performance profiling, optimization, and debugging.
  • Passion for delivering world-class user interfaces with exceptional performance.
  • Deep understanding of cross-platform architecture and how to bridge between JS and native modules.
  • Proven track record of delivering production-quality mobile or desktop applications with React Native.
  • Experience designing scalable frontend architectures and reusable UI frameworks.
  • Strong collaboration skills and ability to work closely with native engineers, designers, and product managers.
  • Demonstrated technical leadership: leading projects, mentoring engineers, or setting engineering strategy.

Bonus

  • A track record of building social, community, gaming, or other consumer products.
  • Familiarity with VoIP, call dialing and ringing flows in Android/React Native
  • Experience with accessibility, internationalization, and UI testing frameworks. 
  • Familiarity with CI/CD pipelines and modern build systems for frontend development.
  • Previous experience at an early-stage startup or on a zero-to-one product team.

Apply