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Senior Full Stack Java Developer Jobs in Welland, ON

You'll work across the stack and partner closely with engineering to catch issues early and raise ... Python, Java, TypeScript * Test frameworks: pytest, JUnit, Playwright or Cypress * API and load ...

... Stack * Backend: Java (Spring Boot), Python, Some components in C and C++ * Frontend: TypeScript, Angular * Data: PostgreSQL, TimescaleDB * Infrastructure: Linux (Ubuntu) * Tools: JIRA, Bitbucket ...

We are seeking a dynamic and business-savvy Senior Power Platform Developer to join our team. This ... Support the full lifecycle of solution delivery from ideation and prototyping to deployment and ...

We are offering an exciting opportunity for a Senior Lead Structural Engineer to join our Hamilton ... With over 138 years of experience, H&H is a trusted full-service infrastructure engineering firm.

Contribute to improving development workflows, tooling, and overall engineering practices Requirements // Tech Stack * Backend: Python, Java (Spring Boot), C and C++ * Python tooling: pydantic ...

... a senior technical leader to take ownership of the architecture for a significant engineering ... // Tech Stack * Backend: Python, Java, C and C++ * Python tooling: pydantic, FastAPI, asyncio ...

Your professional transformation starts here Are you full of great ideas? Do you dream of building ... Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field * 5 to ...

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Showing results 1-20

Senior Full Stack Java Developer information

See Welland, ON salary details

$14.6K

$127.8K

$175K

How much do senior full stack java developer jobs pay per year?

As of Jul 8, 2026, the average yearly pay for senior full stack java developer in Welland, ON is $127,771.00, according to ZipRecruiter salary data. Most workers in this role earn between $109,373.00 and $146,803.00 per year, depending on experience, location, and employer.

What are Senior Full Stack Java Developers?

Senior Full Stack Java Developers are experienced software professionals who design, develop, and maintain both the front-end and back-end components of web applications using Java and related technologies. They typically work with frameworks such as Spring Boot for the backend and may use JavaScript frameworks like Angular or React for the frontend. In addition to coding, they often lead development teams, make architectural decisions, and ensure best practices are followed throughout the software development lifecycle.

What are the key skills and qualifications needed to thrive as a Senior Full Stack Java Developer, and why are they important?

A Senior Full Stack Java Developer needs advanced proficiency in Java, front-end frameworks (such as Angular or React), and a solid understanding of databases, supported by a bachelor’s degree in computer science or related field. Experience with tools like Spring Boot, RESTful APIs, version control systems (e.g., Git), and cloud platforms is typically required, along with relevant certifications. Strong problem-solving, communication, and teamwork skills help developers effectively collaborate and deliver robust solutions. These competencies are crucial for building scalable applications, leading projects, and ensuring efficient development processes.

What are some common challenges Senior Full Stack Java Developers face when balancing backend and frontend responsibilities?

Senior Full Stack Java Developers often encounter the challenge of staying up-to-date with both backend Java frameworks and rapidly evolving frontend technologies. Balancing deep expertise in server-side development with proficiency in modern JavaScript frameworks (like React or Angular) can be demanding. Additionally, these professionals often need to effectively prioritize tasks between client and server development while collaborating with specialized frontend or backend team members. Time management, clear communication, and a willingness to learn new tools are essential for success in this multifaceted role.
What cities near Welland, ON are hiring for Senior Full Stack Java Developer jobs? Cities near Welland, ON with the most Senior Full Stack Java Developer job openings:
Infographic showing various Senior Full Stack Java Developer job openings in Welland, ON as of July 2026, with employment types broken down into 68% Full Time, 22% Part Time, 1% Temporary, and 9% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution, with an average salary of $127,771 per year, or $61.4 per hour.
Specialist, Application Development (Full Stack Developer)

Specialist, Application Development (Full Stack Developer)

L3Harris Technologies

Stoney Creek, ON

CA$85K - CA$105K/yr

Full-time

Posted 7 days ago


Job description

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Specialist, Application Development (Full Stack Developer)

Reference #40291

Waterdown, Ontario

About the Role

Responsible for research, design, and development of computer software systems. Participates in all phases of the development life cycle, including requirements analysis, design, implementation, integration, and testing of products.  Applies computer science, engineering, and mathematical analysis concepts and principles in the development of the target application.  Works closely with cross functional organizations to develop and evaluate interfaces, and operational performance requirements and design of the overall system.  Develops test procedures, software programs, and related documentation.   Contributes to determining, estimating, and validating the cost and scope of software efforts to ensure product meets project cost, schedule, and technical constraints

Primary Responsibilities 

  • Develop and maintain web applications using C#, ASP.NET., and Microsoft SQL
  • Collaborate with cross-functional teams to define, design, and ship new features.
  • Write clean, maintainable, and efficient code.
  • Troubleshoot and debug applications.
  • Ensure the performance, quality, and responsiveness of applications.
  • Create device-independent reactive designs using HTML5, CSS3, jQuery, JavaScript, and Bootstrap.
  • Develop unit tests to ensure code quality and reliability.
  • Lead small to medium feature developments.
  • Work in an agile team environment.
  • Be a team player and collaborate effectively with the team.
  • Participate in code reviews and provide constructive feedback.
  • Refactor and restructure existing code bases and modules to improve performance and maintainability

Required Capabilities 

  • Proficiency in C# and ASP.NET.
  • Strong knowledge of SQL Server and database management.
  • Experience with DevOps practices and tools is an asset
  • Experience in a development team that follows Agile project methodologies is an asset
  • Proven analytical and creative problem-solving abilities.
  • Highly self-motivated and directed, with keen attention to detail.
  • Able to prioritize and execute tasks in a high-pressure environment.
  • Able to quickly adapt and learn new or unfamiliar technologies.
  • Strong customer service orientation, and has served as part of a motivated and diverse team.
  • Strong communication and teamwork skills.
  • May have practical knowledge of project management.
  • Bachelor’s Degree in a STEM field (Software Engineering, Computer Science, Computer Engineering, Electrical Engineering, Math) is preferred
  • Understanding of CI/CD pipelines and DevOps practices is an asset
  • Business experience in an aerospace or manufacturing environment is an asset

Desired Education and Experiences 

  • Requires practical knowledge of job area.
  • Bachelor’s Degree and a minimum of 4 years of prior related experience.
  • Graduate Degree or equivalent with 2 years of prior related experience.
  • In lieu of a degree, minimum of 8 years of prior related experience.

*This posting is for a current vacancy.  In the province of Ontario, Canada, the pay range for this position will be $85,000 to $105,000. 

#LI-BD1

At L3Harris, we foster an inclusive and equitable workplace. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. For applicants with disabilities, we will provide you with accommodation so that you have what you need in order to be at your best.

L3Harris performs background checks prior to employment as all applicants must be eligible for registration with the Controlled Goods Program and obtain and maintain a positive security assessment. Some positions may require a government of Canada “Reliability” status and/or Level 2 (Secret) security clearance. In addition, L3Harris performs pre-employment substance abuse testing where required.