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Sr Java J2Ee Developer Jobs in Ontario (NOW HIRING)

Infoya

CA$80K - CA$100K/yr

Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent experience. * 8+ years of hands-on experience developing RESTful APIs and microservices using Java/J2EE. * Strong ...

Citi

Senior Java Full Stack Developer

Mississauga, ON · On-site

The JAVA Full Stack Senior Developer role is an intermediate level position responsible for ... Problem-solving, troubleshooting, and clean code (Core Java, J2EE, Collections, Multithreading) API ...

StackandCo

Senior Java Developer

Galway, NY

\n \n \n \n \n Our client in Galway are beginning to hire Java Engineers (up to senior level) to help the team build out their globally renowned and ever\-present SAAS offering on a permanent basis.

Localcoin

Senior Java Developer

Etobicoke, ON · Hybrid

CA$120K - CA$140K/yr

As a Senior Java Back-End Developer at Localcoin, you will be responsible for developing and maintaining functional and stable back end applications for our company, ensuring system consistency and ...

StackandCo

Minimum 5 years experience as a Senior Engineer \n * Excellent communication skills \- both written and verbal \n * Experience with Java 11 \n * Experience with TDD and CI\/CD \n * Experience in ...

StackandCo

\n \n \n Senior Java Engineer \- \/AWS \n \n * Dublin\/ Galway - Remote\/WFH \n * Long Term Contract \n * Negotiable Day Rate \n Leading Fintech\/ Financial Services organisation is looking for a ...

StackandCo

Minimum 5 years experience as a Senior Engineer \n * Experience with Java 11 \n * Strong experience with Spring frameworks \n * Experience with TDD and CI\/CD \n * Experience in financial services ...

Td

Software Engineer I (Java Backend Developer)

Toronto, ON · On-site

CA$69K - CA$98K/yr

Strong proficiency in Java, J2EE, Hibernate, Spring, Springboot & Kafka. * Advanced skills ... Experience withREDIS, relational database programming, and API development. * Experience with Maven ...

New

Citi

Senior Java Developer

Mississauga, ON

CA$94K - CA$141K/yr

We are seeking a highly motivated and experienced Senior Java Developer to join our dynamic team focused on enhancing developer productivity. Our mission is to build and maintain cutting-edge ...

StackandCo

\n \n \n \n \n Are you a Senior Java Developer with extensive cloud experience looking for your next challenge? Do you have Microservices and TDD? Are you interesting in working in the banking sector?

Citi

Senior Java Developer - Vice President

Mississauga, ON · On-site

CA$120K - CA$170K/yr

The Applications Development Senior Manager (Senior Java Developer - Vice President) is a senior-level position responsible for driving results through hands-on technical leadership and team guidance ...

Atyeti Inc

Sr Java developer

Toronto, ON · On-site

A Java Developer designs, develops, tests, and maintains scalable Java-based applications (web, enterprise, mobile) by writing clean code, collaborating with teams, and integrating with databases and ...

Citi

Senior Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

The Senior Java Developer is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination ...

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All JobsSr Java J2Ee Developer JobsSr Java J2Ee Developer Jobs in Ontario

Sr Java J2Ee Developer information

What is a Sr Java J2EE developer?

Sr Java J2EE Developers are experienced software engineers who specialize in building, deploying, and maintaining enterprise-level applications using Java and the Java 2 Platform, Enterprise Edition (J2EE). They work with technologies like Servlets, JSP, EJB, and frameworks such as Spring and Hibernate to develop scalable, secure, and reliable software solutions. Senior developers often lead teams, design system architecture, and ensure best coding practices are followed throughout the software development lifecycle.

What are some common challenges Sr Java J2EE developers face when working on large-scale enterprise applications?

Sr Java J2EE Developers often encounter challenges such as managing application scalability, ensuring code maintainability, and integrating with legacy systems. Large-scale projects typically involve coordinating with cross-functional teams, which requires effective communication and collaboration skills. Additionally, staying updated with evolving frameworks and best practices is crucial to address performance bottlenecks and maintain security. Proactively addressing these challenges is essential for delivering robust, high-quality enterprise solutions.

What are the key skills and qualifications needed to thrive as a Sr Java J2EE developer, and why are they important?

To thrive as a Sr Java J2EE Developer, you need advanced proficiency in Java programming, expertise in J2EE frameworks, and a bachelor's degree in computer science or a related field. Familiarity with tools like Spring, Hibernate, Maven, RESTful APIs, and version control systems such as Git is typically required. Strong problem-solving abilities, effective communication, and leadership skills make a developer stand out in this senior role. These competencies are crucial for designing robust enterprise applications, collaborating with cross-functional teams, and leading projects to successful completion.

What is the difference between Sr Java J2Ee Developer vs Java Software Engineer?

AspectSr Java J2Ee DeveloperJava Software Engineer
Required CredentialsBachelor's in CS or related, Java certifications often preferredBachelor's in CS or related, Java certifications beneficial
Work EnvironmentDevelops enterprise applications, often in large teamsDesigns and develops Java applications, may work in teams or individually
Industry UsageCommon in finance, healthcare, and enterprise sectorsUsed across various industries including tech, finance, and startups
Search & Comparison IntentOften compared for seniority, responsibilities, and skillsCompared for roles, skills, and career progression

While both roles involve Java development, Sr Java J2Ee Developers typically focus on enterprise-level applications with more experience and responsibilities, whereas Java Software Engineers may work on a broader range of Java projects, including both enterprise and consumer applications.

What are popular job titles related to Sr Java J2Ee Developer jobs in Ontario?

For Sr Java J2Ee Developer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Sr Java J2Ee Developer jobs in Ontario look for?

The top searched job categories for Sr Java J2Ee Developer jobs in Ontario are:

What cities in Ontario are hiring for Sr Java J2Ee Developer jobs?

Cities in Ontario with the most Sr Java J2Ee Developer job openings:

Sr Java J2Ee Developer jobs near you
Infographic showing various Sr Java J2Ee Developer job openings in Ontario as of August 2026, with employment types broken down into 53% Full Time, and 47% Contract. Highlights an 93% In-person, and 7% Hybrid job distribution.

Senior Java developer

Talent Transformation Group Inc

Ottawa, ON • On-site

Full-time

Posted 23 days ago

Job description

We are seeking a senior Java developer to join our team in a full-time employment capacity. This role requires expertise in Java-based systems, along with experience in audio codec integration, VOIP/ROIP protocols, and mission-critical communication systems. The successful candidate will play a key role in the development and enhancement of applications that support military and emergency services communication platforms, ensuring reliability, security, and performance under demanding conditions.
 
Key Responsibilities:
  • Design, develop, and maintain Java applications for use with VOIP/ROIP and digital communication systems.
  • Integrate and optimize audio codecs (e.g., Opus, AAC Audio).
  • Work on SIP, RTP, and other VOIP/ROIP protocols for real-time communication.
  • Collaborate with cross-functional teams to design secure and fault-tolerant communication solutions.
  • Develop and implement features for interoperability with military communication systems.
  • Ensure scalability, low-latency performance, and high availability of communication services.
  • Participate in code reviews, architecture discussions, and technical planning.
  • Regular customer engagement for the purposes of requirements gathering, feature demonstrations, and product support.
Required Qualifications
  • Bachelor’s degree in computer science, Engineering, or a related field.
  • 10+ years of experience in Java development.
  • Located in the Ottawa area or willing to relocate to the Ottawa area.
  • Experience developing distributed client/server environments.
  • In-depth knowledge of VOIP/ROIP technologies (e.g., SIP, RTP, SRTP).
  • Hands-on experience with audio codecs and real-time media processing.
  • Familiarity with radio systems, digital signal processing (DSP), and tactical communication protocols.
  • Strong understanding of network programming and low-level socket communication.
  • Excellent problem-solving, debugging, and performance optimization skills.
 
Preferred Qualifications
  • Experience developing communication software for military, defence, or emergency services.
  • Familiarity with Open SDR (software-defined radio).
  • Active security clearance (Secret or higher).