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Senior Application Developer Jobs in Ontario (NOW HIRING)

StackandCo

\n \n \n \n \n Our Client, a World's Leading FinTech company is looking for a Senior Application Developer to join their brand\-new Irish office building the next generation of commerce infrastructure ...

Novo Nordisk

Senior Application Developer

Mississauga, ON

CA$99K - CA$149K/yr

Sr. Application Developer Information Technology, F&O Department Canada Shape the data architecture behind one of the world's fastest-growing healthcare companies - and see your solutions drive real ...

Novo Nordisk

Senior Application Developer

Mississauga, ON · On-site

CA$99K - CA$149K/yr

Sr. Application Developer Information Technology, F&O Department Canada Shape the data architecture behind one of the world's fastest-growing healthcare companies - and see your solutions drive real ...

Scotiabank

Senior Application Developer

Toronto, ON · On-site

The position is for a Senior Application Developer within the Group Treasury-Liquidity Risk group. The incumbent is responsible for supporting multiple projects, partially application support, as ...

StackandCo

Senior Application Developer

Galway, NY · On-site

\n \n \n \n \n Role Overview The primary responsibility of the senior application developer, in collaboration with a multidisciplinary delivery team, will be the design and development of software ...

StackandCo

... senior application developer, in collaboration with a multidisciplinary delivery team, will be the design and development of software applications based on defined requirements. What You Will Be ...

StackandCo

... primary responsibility of the senior application developer, in collaboration with a ... multidisciplinary delivery team, will be the design and development of software applications based ...

TMX Group

Senior C++ Application Developer

Toronto, ON · Hybrid

We are looking for a versatile Senior Software Engineer to join our core team and help us build and ... Proven experience with containerized application development (Docker/Kubernetes) within AWS, GCP ...

Nasdaq

As a Senior Software Engineer reporting to Head of Engineering, you'll play a critical role in ... Strong understanding of systems architecture, application infrastructure, and software development ...

StackandCo

\n \n \n \n \n Based in Nenagh my client is a global provider of financial services technology. \n \n \n \n \n \n Role Overview \n \n \n The primary responsibility of the senior application developer ...

StackandCo

Senior Java Application Developer

Galway, NY · On-site

Ask questions of the biggest datasets \n \n \n \n \n \n Role Overview Application developers will, in collaboration with a multidisciplinary delivery team, design and develop software applications ...

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Senior Application Developer information

What is a senior application developer?

Senior Application Developers are experienced professionals who design, build, and maintain complex software applications. They lead development teams, make key architectural decisions, and ensure that software projects meet technical standards and business requirements. In addition to writing code, they often mentor junior developers, troubleshoot high-level issues, and collaborate with other departments to deliver robust solutions. Their expertise helps organizations create scalable and efficient applications tailored to business needs.

What are the key skills and qualifications needed to thrive as a senior application developer?

To thrive as a Senior Application Developer, you need advanced programming skills, a deep understanding of software development lifecycles, and typically a bachelor’s degree in computer science or related fields. Mastery of languages like Java, C#, or Python, experience with frameworks, databases, and familiarity with version control systems (such as Git) are essential, and certifications like AWS Certified Developer or Microsoft Certified: Azure Developer Associate can be advantageous. Strong problem-solving, leadership, and communication skills help you manage projects and mentor junior developers. These skills are crucial for delivering robust, scalable applications and ensuring effective collaboration within development teams.

What are some typical challenges faced by senior application developers when leading development projects?

Senior Application Developers often encounter challenges such as balancing project deadlines with code quality, managing technical debt, and integrating new technologies into existing systems. They are typically responsible for mentoring junior developers, which requires strong communication and leadership skills. Additionally, they must collaborate closely with cross-functional teams, such as QA, UX/UI designers, and product managers, to ensure that project requirements are met while maintaining scalability and performance standards.

What is the difference between Senior Application Developer vs Application Engineer?

AspectSenior Application DeveloperApplication Engineer
Required CredentialsBachelor's degree in CS or related field; 5+ years experience; programming certificationsBachelor's degree in CS or related field; 3+ years experience; technical certifications
Work EnvironmentDesigning, developing, and maintaining applications; leading projectsImplementing, testing, and supporting applications; collaborating with development teams
Employer & Industry UsageTech companies, finance, healthcare; senior roles in software developmentIT firms, manufacturing, telecom; technical support and implementation roles

While both roles involve application development, Senior Application Developers typically lead projects and have more experience, whereas Application Engineers focus on implementing and supporting applications within technical teams.

How much does a senior application developer make?

The average salary for a senior application developer typically ranges from $100,000 to $150,000 annually, depending on experience, location, and industry. Skilled developers with expertise in specific programming languages, frameworks, or certifications may earn higher compensation. Salaries can also vary based on company size and project complexity.

What are the most commonly searched types of Application Developer jobs in Ontario?

The most popular types of Application Developer jobs in Ontario are:

What cities in Ontario are hiring for Senior Application Developer jobs?

Cities in Ontario with the most Senior Application Developer job openings:

Senior Application Developer jobs near you
Infographic showing various Senior Application Developer job openings in Ontario as of August 2026, with employment types broken down into 76% Full Time, 19% Part Time, and 5% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution.

Senior Application Developer

StackandCo

On-site

Full-time

Re-posted 3 days ago

Job description

\n <\/head>\n \n \n
\n Our Client, a World's Leading FinTech company is looking for a Senior Application Developer to join their brand\-new Irish office building the next generation of commerce infrastructure, services and analytics as part of the research and development organization of the largest global payment processor.<\/span>
\n <\/div>\n
\n
\n <\/div>\n
\n Role Overview
<\/u><\/b>The primary responsibility of the senior application developer, in collaboration with a multidisciplinary delivery team, will be the design and development of software applications based on defined requirements.
<\/i>Primary Objectives<\/u><\/b>\n <\/div>\n
\n
<\/u><\/b>\n <\/div>\n
    \n
  • Contribute significantly to implementing and documenting technical solutions within a collaborative, high trust, solutions delivery team that will contain scrum masters, product owners, architects, other engineers (developers, test engineers and technical delivery engineers).
    <\/li>\n
  • Work within an agile delivery process to deliver high quality estimates and outcomes for complex projects.
    <\/li>\n
  • Support the architectural direction, solution specification, development, implementation and delivery of new and existing applications or services.
    <\/li>\n
  • Continuously innovate in terms of process and technology.
    <\/li>\n
  • Must have strong verbal, written and organizational skills and strong customer focus.
    <\/li>\n
  • Embrace emerging technologies and keep abreast of new frameworks, tools and programming languages.
    <\/li>\n
  • Be responsible for the execution of the full suite of development tasks in a modern delivery pipeline, including validation activities (such as unit, component, system integration and regression testing) and infrastructure activities (such as IAC within automated pipelines).
    <\/li>\n
  • Be a proactive stakeholder in code quality, coding to standards, secure code (understanding of OWASP) and overall product quality.
    <\/li>\n
  • Creation of monitoring and logging solutions to allow for state\-of\-the\-art monitoring of the enterprise applications within the production environment.
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  • Provide knowledge transfer; actively support and educate internal and external team members.
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  • Partner with developers, analysts, and tech leads across the enterprise to identify business needs and appropriate technical solutions
    <\/li>\n
  • Support the developed solutions in production in a <\/span>build it own it<\/i> <\/span>model.
    <\/li>\n
  • \n
    \n Will perform additional job duties as required
    \n <\/div><\/li>\n <\/ul>\n
    \n
    \n <\/div>\n
    \n Knowledge & Skills<\/u><\/b>
    \n <\/div>\n
    \n
    <\/u><\/b>\n <\/div>\n
      \n
    • Minimum 5 years' experience in designing, developing and implementing software applications\/, some of which is preferably in a tech lead\/leadership role. Full stack development experience is preferred.
      <\/li>\n
    • Bachelor's degree in a relevant discipline such as computer science, business informatics or mathematics. Comparable education or professional experience also considered.
      <\/li>\n
    • In\-depth experience with several full stack technologies such as Spring, Spring\-Boot, Spring\-Web, JSF, JPA\/Hibernate, REST, Kafka, HTML\/CSS, JavaScript and Bootstrap.
      <\/li>\n
    • Excellent knowledge in JEE\/Spring, JAVA 8, Maven, Shell\-Scripting.
      <\/li>\n
    • Experience with micro\-service architectures and linux based operating systems
      <\/li>\n
    • Experienced in runtime, build and deployment technologies as well as project tools, e.g. Eclipse, IntelliJ, GitLab, JIRA and Confluence.
      <\/li>\n
    • Knowledge of modern database technologies (relational\/non\-relational).
      <\/li>\n
    • Knowledge of virtual infrastructure and associated services (e.g. public cloud) as well as containerization and orchestration technologies (ideally docker, pcf, kubernetes).
      <\/li>\n
    • Knowledge of payments industry ideal (ISO8583, POS etc.)
      <\/li>\n
    • Willingness to take ownership and the ability to demonstrate strong personal commitment. Must be comfortable with being considered a reliable and proactive influential team member who is not afraid to take on responsibility in the team (for highlighting, planning and implementing improvements in existing and new applications). Must be high on social skills, team spirit and empathy.
      <\/li>\n
    • Strong communication skills (e.g. with business analysts and stakeholders as well as technical\-representatives), coordination skills
      <\/li>\n
    • Highly organized and highly competent in solving issues and finding solutions.
      <\/li>\n
    • Can do, will do open\-minded attitude. You will wear many hats, some you will be familiar with and others will be an opportunity to develop.
      <\/li>\n <\/ul>\n
      \n
      \n <\/div><\/span>
      \n <\/body>\n<\/html>

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