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Java Developer Startup Jobs in Ontario (NOW HIRING)

Director of Application 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 ...

Technical Lead

Toronto, ON · Hybrid

CA$130K - CA$170K/yr

The Opportunity We're an ambitious Toronto-based startup building data-driven products that operate ... Set the Bar for Engineering: Define and enforce best practices around code quality, CI/CD ...

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

Development Manager

Toronto, ON · Hybrid

CA$130K - CA$155K/yr

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 ...

Development Manager

Toronto, ON · Hybrid

CA$130K - CA$155K/yr

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 ...

Development Manager

Toronto, ON · On-site

CA$130K - CA$155K/yr

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 ...

Development Manager

Toronto, ON · On-site

CA$130K - CA$155K/yr

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 ...

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)

Partner with machine learning engineers on the deployment of applicable models for business ... C++, Java, etc.) * 3 years of experience with statistical packages * 3 years of experience ...

Product Manager, Flights

Toronto, ON · Hybrid

CA$100K - CA$120K/yr

... 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 ...

Showing results 41-60

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 Sep 8, 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:

Infographic showing various Java Developer Startup job openings in Ontario as of September 2026, with employment types broken down into 84% Full Time, 6% Part Time, and 10% Contract. Highlights an 79% Physical, 5% Hybrid, and 16% Remote job distribution, with an average salary of $127,888 per year, or $61.5 per hour.

Staff Fullstack Engineer, AI Acceleration Team

Toronto, ON • On-site

Okta
Software Development • 5 - 10K employees

Full-time

Posted 11 days ago


Key responsibilities

  • Own the technical build for solving agent authorization and phishing resistance.

  • Design secure access by building phishing-resistant authentication and authorization for both people and agents.

  • Make architectural decisions on distributed systems and complex API integrations to ensure scalability.


Okta rating

9.8

Company rating: 9.8 out of 10

Based on 5 frontline employees who took The Breakroom Quiz

3rd of 247 rated software companies


Job description

Staff FullStack Engineer, AI Acceleration TeamThe AI Acceleration Team

The AI Acceleration Team builds AI features right where identity and agents meet. Companies are handing real access to AI agents faster than their controls can keep up, and two problems show up first: how do you authorize what an agent is allowed to do on someone's behalf, and how do you keep both people and agents from being phished? We take those on directly.

Our North Star: to get AI right, you have to get identity right. We are a new team, and we shape the problems as much as we solve them. We bring a product mindset to the work: we dig into what customers actually need, define the outcome, and build toward it. We move fast, stay close to the real problem, and are honest about what works.

The Staff FullStack Engineer Opportunity

As a Staff FullStack Engineer on the AI Acceleration Team, you will own the technical build for solving agent authorization and phishing resistance. You see what needs doing and start it. This is 0-to-1 work, meaning you will move on problems before they are fully specified, always keeping customer success as the ultimate bar.

You will help shape which problems we take on, make architectural calls that outlive any single project, and set the technical bar for how we work. You will enforce least privilege for what agents can do and make phishing-resistant access the default. We build with Vercel and AWS, and you will likely work heavily in JavaScript/TypeScript and Java.

What you'll be doing
  • Solve core authorization challenges: Define how companies authorize agent actions and enforce least privilege for what an agent can do on a user's behalf.
  • Design secure access: Build phishing-resistant authentication and authorization for both people and the agents acting for them.
  • Shape the product: Bring a product mindset to dig into what customers need, define the desired outcomes, and build toward them rather than just executing solutions.
  • Own the quality bar: Act as the voice for product and quality judgment in the room, taking ownership of the outcome, not just the code.
  • Drive technical architecture: Make and defend architectural decisions on distributed systems and complex API integrations that will scale as the work grows.
  • Modernize development: Advance how we use AI across our development lifecycle-how we design, review, and ship-and bring the rest of the team along with you.
  • Coach and multiply: Raise the technical bar of the entire team, building judgment in others rather than trying to solve everything yourself.
  • Improve engineering excellence: Spot and prioritize tech debt, driving improvements beyond feature work (CI/CD, observability, documentation, reliability, and support).
  • Stay customer-aware: Build with a clear, direct line to the customer problem and the outcome you're solving for, even if you aren't in every customer conversation.
What you'll bring to the role
  • A self-starter mentality: The ability to spot what matters, drive work autonomously, and thrive in ambiguity while helping to form a new charter.
  • Advanced AI tool proficiency: The ability to apply AI meaningfully across the software development lifecycle, evaluate new tooling with good judgment, and establish practices for the wider team.
  • Architectural expertise: Proven experience defining scalable backend architectures and integrating complex APIs with modern web technologies, including making decisions with lasting, org-wide impact.
  • Security fundamentals: A solid grasp of web authentication and authorization, including how auth flows work and how to secure sensitive user data.
  • Backend proficiency: Deep expertise in building reliable, secure, enterprise-grade software in Java or another type-safe language.
  • Frontend flexibility: High proficiency in JavaScript/TypeScript with true fullstack range, including the ability to ship robust frontends.
  • Cloud infrastructure knowledge: Strong cloud architecture fundamentals, with experience designing and operating large-scale services on AWS.
Extra credit
  • Background working on a zero-to-one, startup-like team.
  • Track record of leading a team through a real shift in how they work (e.g., AI adoption, new developer tooling, or cultural shifts).
  • Familiarity with developing Identity and Access Management (IAM) tooling.

P25592


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