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Java Developer Startup Jobs in Ontario (NOW HIRING)

Signal 1

Forward Deployed Engineer

Toronto, ON · On-site

Signal 1 is a 30-person, well-funded and rapidly growing startup with strong product market fit and ... Solid backend development skills, with strong programming experience in Python, Java, or similar

Priceline

Development Manager

Toronto, ON · Hybrid

CA$130K - CA$155K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

You will lead a full-stack engineering team (Java and Node.js backend, Node/React frontend ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

Priceline.com LLC

Development Manager

Toronto, ON · Hybrid

CA$130K - CA$155K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

You will lead a full-stack engineering team (Java and Node.js backend, Node/React frontend ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

ShyftLabs

Tech Lead / Solution Architect

Toronto, ON

  • Medical

  • Dental

  • Vision

Guide engineers through architectural decisions and design reviews. * Coordinate across globally ... A startup mindset: adaptable, execution-focused, comfortable owning ambiguity end-to-end. Nice to ...

Priceline.com LLC

Development Manager

Toronto, ON · On-site +1

CA$130K - CA$155K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Hire, mentor, and coach engineers to foster career growth and technical excellence. * Delivery ... Exposure to Java-based applications or codebases is a plus. There are a variety of factors that go ...

Priceline

Development Manager

Toronto, ON

CA$130K - CA$155K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Hire, mentor, and coach engineers to foster career growth and technical excellence. * Delivery ... Exposure to Java-based applications or codebases is a plus. There are a variety of factors that go ...

DNAstack

Bioinformatics Analyst

Toronto, ON

  • Medical

  • Dental

  • Vision

  • PTO

Ability to work in a fast-paced startup environment with a bias toward action, a willingness to ... Strong programming and scripting skills (Python preferred; R, SQL, Java, or bash also valued)

Priceline

Development Manager (Full-Stack)

Toronto, ON · Hybrid

CA$13K - CA$15K/mo

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... engineering talent, including performance management. * Strong proficiency in Java, JavaScript ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

Priceline.com LLC

Development Manager (Full-Stack)

Toronto, ON · Hybrid

CA$13K - CA$15K/mo

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... engineering talent, including performance management. * Strong proficiency in Java, JavaScript ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

Priceline.com LLC

Product Manager, Flights

Toronto, ON · Hybrid

CA$100K - CA$120K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... and Engineering teams (specializing in Elixir, Java, and Node.js) to design end-to-end solutions ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

Priceline

Product Manager, Flights

Toronto, ON · Hybrid

CA$100K - CA$120K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... and Engineering teams (specializing in Elixir, Java, and Node.js) to design end-to-end solutions ... We're a grown-up, startup. We deliver the excitement of a new venture, without the struggles and ...

Capital One

Senior Manager, Data Science

Toronto, ON · On-site

When we launched as a startup we disrupted the credit card industry by individually personalizing ... programming languages for large scale data analysis (Python, Scala, or Java) * At least 7 years of ...

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Showing results 41-57

All JobsJava Developer Startup JobsJava Developer Startup Jobs in Ontario

Java Developer Startup information

See Ontario salary details

$35.5K

$127.9K

$173K

How much do java developer startup jobs pay per year?

As of Aug 18, 2026, the average yearly pay for java developer startup in Ontario is $127,888.00, according to ZipRecruiter salary data. Most workers in this role earn between $98,000.00 and $156,000.00 per year, depending on experience, location, and employer.

What is a Java developer startup?

A Java Developer Startup job involves designing, developing, and maintaining Java-based applications in a fast-paced startup environment. Developers work on scalable solutions, collaborate with cross-functional teams, and adapt to evolving product requirements. Unlike corporate roles, startup jobs often require versatility, problem-solving skills, and the ability to work with limited resources.

What are the key skills and qualifications needed to thrive as a Java developer in a startup?

A successful Java Developer in a startup environment should have strong proficiency in Java, object-oriented programming principles, and experience with frameworks like Spring or Hibernate, often backed by a degree in computer science or a related field. Familiarity with version control systems (like Git), CI/CD pipelines, and cloud platforms is highly valued, and industry certifications such as Oracle Certified Professional can be advantageous. Soft skills like adaptability, proactive problem-solving, and clear communication help developers collaborate in small, fast-paced teams. These competencies are essential for quickly delivering high-quality software and driving innovation in the dynamic startup landscape.

What kind of work environment and team structure can I expect as a Java developer in a startup?

As a Java Developer in a startup, you'll typically work in a small, agile team where roles can be fluid and collaboration is highly encouraged. You may have the opportunity to work closely with product managers, designers, and other developers, allowing for greater input into the overall direction of the product. Daily responsibilities often extend beyond coding to include brainstorming sessions, code reviews, and quick iteration based on user feedback. The environment is fast-paced, offering opportunities for rapid skill development and taking on new responsibilities as the company grows. This setting is ideal for those who enjoy problem-solving, continuous learning, and making a direct impact on the product and business.

What are popular job titles related to Java Developer Startup jobs in Ontario?

For Java Developer Startup jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Java Developer Startup jobs in Ontario look for?

The top searched job categories for Java Developer Startup jobs in Ontario are:

Java Developer Startup jobs near you
Infographic showing various Java Developer Startup job openings in Ontario as of August 2026, with employment types broken down into 75% Full Time, 12% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $127,888 per year, or $61.5 per hour.

Senior Software Engineer - Matching (Canada)

Backstory

Toronto, ON • On-site

Full-time

Re-posted 25 days ago

Job description

Backstory helps companies understand the state of their revenue business by answering questions that span customer interactions, sales activity, pipeline health, and deal execution. The platform operates over trillions of sales activities, millions of deals, and more than 160 million business contacts, giving customers a unified view of the signals that drive revenue. Companies such as Nvidia, OpenAI, AMD, Red Hat, and Databricks rely on Backstory to surface risks, identify opportunities, and understand what's happening across their business.

Backstory is building AI systems that reason over massive amounts of enterprise data to help business leaders understand what's happening in their business and what to do next. We work at the intersection of large language models, retrieval, evaluation, distributed data systems, and product design, turning billions of signals from across the enterprise into insights people can trust. The underlying challenges span reasoning, search, ranking, data quality, knowledge representation, and operating AI systems against continuously evolving real-world information.

As a Senior Software Engineer on the Matching team, you will work on Backstory's foundational technology - matching business activities to business context. You will handle a vast amount of business data, perform data-driven research, design and develop algorithms and microservice architecture, write machine learning and automation code, and build scalable systems that power the AI-engine behind Backstory's products.

We value ownership highly - the ability to take an idea through all the stages from conception to shipping a product. This reflects throughout our company, but is especially true in engineering. As an engineer at Backstory, you'll be a part of a highly independent and autonomous team. Since we're building out a robust data layer that needs to be presented elegantly to the end-user, you'll be working with a large array of different technologies and fields. Expect lots of interesting challenges.

Responsibilities:
  • Design and implement core backend services and data pipelines.
  • Perform data-driven research using big data and leveraging Data Science toolset
  • Document design choices and operational knowledge to successfully deploy and run services.
  • Provide appropriate test coverage, unit and integration testing, with focus on performance and cost efficiency for your feature ownership areas.
  • Ensure robust alerting, dashboards, and runbooks for production services are in place.
  • Collaborate within the team and with other engineering teams to build new features and products according to business needs.
  • Follow software design and development best practices and promote such practices in the team.
Requirements:
  • 5+ years of professional experience working on backend systems in an enterprise environment
  • 3+ years experience with data analysis / data science tasks and/or ML
  • 2+ years experience programming in Python 2.x/3.x or Scala or Java
  • Experience with AI development tools (especially agentic AI) is a plus
  • Experience developing systems based on LLM is a plus
  • Understanding of SOA, microservices, and event-driven architecture
  • Experience with an enterprise-grade stack for scalable web apps including messaging broker, in-memory storages, NoSQL, and key-value databases
  • Strong knowledge of TDD, Unit, and automated test paradigms
  • Experience with SQL and RDBMS solutions
  • Experience with large-scale data processing (Spark)
Headquartered in San Francisco, CA, Backstory is backed by Y Combinator and Silicon Valley's top investors, including ICONIQ Capital, Andreessen Horowitz, Lightspeed Venture Partners, Akkadian Ventures, and Mubadala Capital. Backstory is listed in the top 20 percent of Inc 5000 companies, is a regular leader in our key categories on G2, and is on the Forbes list of America's Best Startup Employers. For more information, please visit www.backstory.ai.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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