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Software Engineer Startup Jobs in Ontario (NOW HIRING)

Rockstar

Software Engineer

Toronto, ON · On-site

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 ...

Actalent

Software Engineer

Ottawa, ON · Hybrid

Support system boot-up functionality and startup sequence services to ensure reliable and ... production software environment. * Strong hands-on programming skills in C and C++, at an ...

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 ...

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 ...

MBR Partners

Senior Software Engineer

Toronto, ON · Remote

$150K/yr

With a back-end team in the Philippines, I'm currently hiring for a Senior Software Engineer / Staff Engineer to join our client's startup where they are already No1 order-taking system for drive ...

MBR Partners

Senior Software Engineer

Toronto, ON · Remote

$150K/yr

With a back-end team in the Philippines, I'm currently hiring for a Senior Software Engineer / Staff Engineer to join our client's startup where they are already No1 order-taking system for drive ...

TOPOLIO

Software Engineer, CTO

Toronto, ON

You have walked the talk at various levels and can be effective in all startup roles from scripting ... Software Engineering Expert in Ruby on Rails and/or Java Experience with AWS, Scala, REST, Pyton ...

TTEC Digital

Principal Software Engineer

Toronto, ON · Remote

We move like an early-stage startup, backed by the scale, distribution, and enterprise client base ... As this group's Principal Software Engineer , you will be the "right-hand" of the engineering ...

BuildOps

Senior Software Engineer

Toronto, ON · On-site +1

We're looking for a Senior Software Engineer to help build and scale the product experiences and ... Comfort working in a fast-paced startup environment where priorities evolve and strong judgment ...

KitchenMate

Lead Software Engineer

Toronto, ON

Our talented team of software engineers, hardware engineers, and operators have previously worked ... Startup experience We work hard, but smart towards our mission as a team. We think from first ...

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Software Engineer Startup information

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

To thrive as a Software Engineer in a startup environment, you need solid programming skills, a problem-solving mindset, and a degree in computer science or related experience. Familiarity with agile methodologies, cloud platforms, version control (like Git), and rapid prototyping tools is highly valued, and startup engineers may also benefit from exposure to full-stack development. Adaptability, effective communication, and the ability to work independently in uncertain environments are standout soft skills. These competencies enable engineers to rapidly iterate on products, effectively collaborate across small teams, and contribute to the dynamic demands of a growing company.

What is a Software Engineer Startup job?

A Software Engineer Startup job involves developing, testing, and maintaining software in a fast-paced, early-stage company. Engineers in startups often wear multiple hats, working on both backend and frontend development, infrastructure, and sometimes even product decisions. The role requires adaptability, problem-solving skills, and the ability to work with limited resources. Unlike larger companies, startup engineers may need to prototype quickly, iterate based on user feedback, and contribute to the overall growth strategy. This position is ideal for those who enjoy dynamic environments and taking ownership of projects.

What can I expect from the daily work environment as a Software Engineer at a startup?

Working as a Software Engineer at a startup typically means you'll be part of a small, agile team where roles and responsibilities can shift quickly based on company needs. You'll often participate in daily stand-ups, collaborate closely with founders or product leads, and have the opportunity to contribute ideas beyond your core coding tasks. The pace is usually fast, and you'll likely wear multiple hats, working on everything from prototyping new features to troubleshooting production issues. This hands-on, collaborative atmosphere provides excellent opportunities for skill growth, creative problem-solving, and making a visible impact on the company's direction.

What are the most commonly searched types of Software Engineer Startup jobs in Ontario? The most popular types of Software Engineer Startup jobs in Ontario are:
What are popular job titles related to Software Engineer Startup jobs in Ontario? For Software Engineer Startup jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Software Engineer Startup jobs in Ontario look for? The top searched job categories for Software Engineer Startup jobs in Ontario are:
What cities in Ontario are hiring for Software Engineer Startup jobs? Cities in Ontario with the most Software Engineer Startup job openings:
Software Engineer Startup jobs near you
Infographic showing various Software Engineer Startup job openings in Ontario as of July 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.
Software Engineer

Software Engineer

Rockstar

Toronto, ON • On-site

Other

Retirement, PTO

Posted 20 days ago

Job description

Rockstar is recruiting for an early-stage, well-funded startup that is transforming how enterprise accounting teams manage the month-end close process. The founding team brings deep experience from both finance and engineering, having overseen finance organizations at leading tech companies and built month-end close systems at major enterprises. The company is backed by top-tier investors and finance leaders from some of the most innovative organizations in the industry.

About the Company

This early-stage startup is dedicated to helping enterprise accounting teams streamline the tedious process of month-end closing. The founders have experience from both sides of the problem: overseeing finance organizations at leading technology companies and building month-end close systems at major tech firms. The company has raised a record-setting seed round in the accounting space from top venture capital firms and is supported by finance leaders at prominent technology companies.

Role Overview

They are setting up a new Toronto engineering office and need a founding team
As a founding engineer, the selected candidate will be at the core of building the product from the ground up. This role offers the opportunity to shape both the front-end and back-end architecture, working closely with the founders and early customers to solve complex financial problems.

Key Responsibilities

- Lead full-stack development of key product features such as reconciliations, flux analysis, and accruals automation

- Build and maintain robust integrations with financial systems including ERPs, HRIS, procurement software, and CRMs

- Design and implement core components of the backend platform, including the jobs framework, flexible data ingestion, and complex financial modeling

- Ensure best practices in software development, including code quality, automated testing, and CI/CD

- Collaborate with the founding team on product strategy, feature prioritization, and customer feedback loops

- Build and maintain planning and agentic workflows using state-of-the-art large language models

- Collaborate on technical decisions regarding scalability and security

- Help build the engineering team and culture

Required Skills

- Bachelor's or master's degree in computer science or a related field

- 1-3 years of experience in full-stack development, preferably with early-stage startups

- Strong experience building financial systems is preferred

- Proficiency in front-end technologies such as React and NextJS

- Strong back-end development experience with Go or similar technologies

- Strong experience with relational databases and modeling

- Familiarity with cloud infrastructure (AWS, GCP)

- Ability to understand basic machine learning concepts and quickly ramp up

- Startup mentality with a passion for rapid prototyping, testing, and iterating on feedback

- Fintech or accounting software experience is a plus

Why Join

- Be a core part of a mission-driven startup looking to transform accounting processes

- Work in a fast-paced environment where decisions directly impact product direction and company growth

- Opportunity to grow with the company and build a technical team from the ground up

- Competitive salary, equity, and benefits (401k, unlimited PTO)

Join in revolutionizing the accounting month-end close and making accounting operations more efficient for businesses everywhere!

Apply