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Full Stack Development Internship Jobs in Ontario

Citi is seeking a highly motivated and accomplished candidate for Java Full Stack Dev Tech Lead role in Wholesale Lending Technology team that serves Institutional Credit Management (ICM). It is a ...

Quality AssuranceChampion test-driven development, including unit and front-end testing (Cypress ... Who you areProven experience as aFull Stack Developer Lead orSenior Full Stack Developerwith a ...

... development and cloud infrastructure. The ideal candidate will possess deep expertise in our ... Full-Stack Proficiency in Java, Python, and JavaScript. * Hands-on experience with cloud providers ...

... development and cloud infrastructure. The ideal candidate will possess deep expertise in our ... Full-Stack Proficiency in Java, Python, and JavaScript. * Hands-on experience with cloud providers ...

Our Client is a data management and risk assessment startup, looking for a dedicated Full Stack ... team of development interns What you need: -Experience with common web technologies, such as:

... Full Stack Development experience \n * Expert level knowledge of PHP and JavaScript \n * Experience in Laravel and React \n * The right to work in Ireland immediately \n \n \n \n \n \n

June 1st, 2026 SKILLS REQUIRED * 10+ years of experience as in full stack development * Expertise with front end tools and technologies including Angular Material, Node.JS, Rust, Webpack, Typescript

Minimum 3 (ideally 5) years Full Stack Development experience building applications \n * 3+ years with Node.js or a similar backend programming language (PHP, C#, Java, Ruby, Python) \n * 3\-5 years ...

Support the architectural direction, solution specification, development, implementation and ... Full stack development experience is preferred. \n * Bachelor's degree in a relevant discipline ...

Applies full stack development patterns and software architecture principles to write robust and maintainable code. * Collaboration: Works effectively in cross-functional teams, partnering with ...

Minimum 3 (ideally 5) years Full Stack Development experience building applications \n * 3+ years with Node.js or a similar backend programming language (PHP, C#, Java, Ruby, Python) \n * 3\-5 years ...

Be Seen First

Senior AI Developer/ Full Stack

Toronto, ON · On-site

CA$115K - CA$130K/yr

This role is critical to the development of a fast-moving, mission-critical MVP, ensuring that ... Full Stack Product Development * Contribute to the operator and admin platform using React and ...

Support the architectural direction, solution specification, development, implementation and ... Full stack development experience is preferred. \n * Bachelor's degree in a relevant discipline ...

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Full Stack Development Internship information

What is the difference between Full Stack Development Internship vs Front End Developer Internship?

AspectFull Stack Development InternshipFront End Developer Internship
Required SkillsHTML, CSS, JavaScript, backend frameworks, databasesHTML, CSS, JavaScript, UI/UX design
Work EnvironmentBoth frontend and backend tasks, collaborative projectsPrimarily UI/UX, client-side development
Industry UsageWeb development companies, startups, tech firmsWeb agencies, tech startups, digital agencies

Full Stack Development Internships involve working on both frontend and backend development, providing a comprehensive experience in web application creation. Front End Developer Internships focus specifically on user interface and client-side features. Both roles are valuable for gaining industry experience, but Full Stack roles offer broader exposure to the entire development process.

What is a Full Stack Development Internship?

A Full Stack Development Internship is a temporary training position where interns gain hands-on experience in both front-end and back-end web development. Interns work with various technologies, such as HTML, CSS, JavaScript, databases, and server-side languages, to build and maintain complete web applications. This role helps aspiring developers understand the software development lifecycle, collaborate with teams, and apply classroom knowledge to real-world projects. It's an excellent opportunity for students or recent graduates to enhance their coding skills and increase their employability in the tech industry.

What are the key skills and qualifications needed to thrive as a Full Stack Development Intern, and why are they important?

To thrive as a Full Stack Development Intern, you need a solid understanding of both front-end (HTML, CSS, JavaScript) and back-end (such as Node.js, Python, or Java) development, often supported by relevant coursework or projects. Familiarity with tools like Git, databases (e.g., MySQL or MongoDB), and frameworks like React or Express.js is typically expected. Strong problem-solving skills, a willingness to learn, and effective communication set standout interns apart. These skills and qualities are crucial for contributing to projects, adapting to new technologies, and collaborating successfully within a development team.

What types of projects or tasks can I expect to work on during a Full Stack Development Internship?

As a Full Stack Development Intern, you will typically work on both front-end and back-end components of web applications. Common tasks include building user interfaces, developing APIs, integrating databases, and collaborating with designers and senior developers to deliver features. You may also be involved in debugging, testing, and deploying code to ensure product stability. This hands-on experience offers a great opportunity to learn industry-standard tools and workflows, while contributing directly to live projects.
What are the most commonly searched types of Full Stack Development jobs in Ontario? The most popular types of Full Stack Development jobs in Ontario are:
What are popular job titles related to Full Stack Development Internship jobs in Ontario? For Full Stack Development Internship jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Full Stack Development Internship jobs in Ontario look for? The top searched job categories for Full Stack Development Internship jobs in Ontario are:
What cities in Ontario are hiring for Full Stack Development Internship jobs? Cities in Ontario with the most Full Stack Development Internship job openings:
Infographic showing various Full Stack Development Internship job openings in Ontario as of May 2026, with employment types broken down into 33% Internship, and 67% Full Time. Highlights an 74% In-person, and 26% Remote job distribution.
Java Full Stack Dev Tech Lead

Java Full Stack Dev Tech Lead

Citi

Mississauga, ON • Hybrid

Full-time

Posted 4 days ago


Job description

Citi is seeking a highly motivated and accomplished candidate for Java Full Stack Dev Tech Lead role in Wholesale Lending Technology team that serves Institutional Credit Management (ICM). It is a leadership position responsible for the strategic direction, establishment, and implementation of new or significantly revised application systems and programs. This role involves driving architectural decisions, managing key stakeholder expectations, and providing hands-on technical guidance to ensure the successful delivery of complex solutions. 

This role offers a unique opportunity to immerse oneself in and contribute significantly to the Wholesale Lending Division, gaining extensive exposure to business and technology initiatives aimed at maintaining Citi's leadership position. The environment fosters innovation and operates within a Hybrid-Agile framework.


Responsibilities:

  • Strategic Technical Leadership: Provide vision and strategic direction for the full stack development across Angular/React, Java, and Spring Boot ecosystems, ensuring alignment with enterprise architecture standards and business objectives.

  • Architectural Design & Solutioning: Lead the detailed design and architectural blueprinting of scalable, resilient, and performant solutions, leveraging deep expertise in Java, Spring Boot, Kafka, and microservices architectures.

  • Team Leadership & Management: Work with engineers onshore, offshore and matrix teams to implement a business solution. Mentor, and manage high-performance engineering teams, fostering a culture of technical excellence, collaboration, and continuous improvement.

  • Stakeholder Engagement & Management: Proactively engage with senior business stakeholders, product owners, and other technology groups to understand requirements, manage expectations, communicate progress, and influence strategic decisions.

  • Hands-on Technical Guidance: Provide hands-on expertise in complex coding challenges, code reviews, and technical problem-solving. Guide teams in implementing best practices.

  • Quality Assurance & Standards: Champion and enforce high standards for code quality, security, and maintainability. Drive the adoption of industry best practices, design patterns, coding standards, and modularity across all development efforts.

  • Innovation & Adoption: Continuously evaluate and advocate for the adoption of new development tools, libraries, and approaches to enhance delivery quality, efficiency, and system resilience.

  • Vulnerability & Security Management: Implement stringent security practices, analyze applications for vulnerabilities, and lead efforts in ensuring compliance with Citi's security policies and standards.

  • Problem Resolution & Escalation: Act as a primary escalation point for complex technical issues, exercise expert judgment to identify root causes, analyze information, and implement effective, sustainable solutions.


Required Skills:

  • 8+ years of hands-on experience in building enterprise scale highly componentized applications

  • Expert-level Full Stack Development: Demonstrated experience in Angular, React, and associated testing frameworks (Jest).

  • Advanced Java Ecosystem Proficiency: Expertise in Java, Spring Framework, Spring Boot, Spring Security, Spring Web, Spring Data, coupled with hands-on experience in Threading, Collections, Exception Handling, JDBC, OOD/OOP Concepts, and GoF Design Patterns.

  • Messaging & Integration Architectures: Experience with Messaging-Oriented Middleware (MoM), and Micro-services utilizing REST, with a strong understanding of Kafka and other enterprise messaging systems (e.g., RabbitMQ, ActiveMQ, IBM MQ).

  • Cloud-Native & DevOps Expertise: Proven experience in designing and implementing cloud-ready applications and deployment pipelines on large-scale container platforms (e.g., Kubernetes, Docker). Strong understanding of CI/CD environments and tools (Tekton, Harness, Jenkins, Code Quality).

  • Database Expertise: Proficient in SQL, particularly Oracle dialect, with comprehensive knowledge of database SQL optimization.

  • Architectural & Design Principles: In-depth knowledge of industry standard best practices, design patterns, coding standards, modularity, and prototyping.

  • System Optimization & Troubleshooting: Advanced skills in debugging, performance tuning, and optimizing complex enterprise applications.

  • Agile & SDLC Leadership: Thorough understanding and practical experience leading teams within the Agile SDLC framework.

  • Leadership & Communication: Consistently demonstrates clear and concise written and verbal communication skills, with a proven ability to lead, influence, and articulate complex technical concepts to both technical and non-technical senior stakeholders. Demonstrated ability to adjust priorities quickly as circumstances dictate, and project management skills to manage multiple critical deliverables.

Nice to have Skills:

  • Industry: Experience developing applications in Financial Services.

  • Documents Storage: Experience with storage of documents in Documentum, S3 compatible Software Defined Storage (SDS) systems.

  • Application Servers: Experience with application servers like Tomcat, Jetty, Apache HTTPD.

  • Application Performance Monitoring Tools: Experience with APM tools like Dynatrace, AppDynamics.

  • Caching Technologies: Experience with distributed caches like Hazelcast, MemCached, Redis.

  • AI: Experience working with Gen AI Integrations.


Education:

  • Bachelor’s degree/University degree or equivalent experience

  • Master’s degree preferred


This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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Job Family Group: Technology

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Job Family:Applications Development

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Time Type:Full time

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Primary Location Full Time Salary Range:$120,800.00 - $170,800.00

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Most Relevant Skills Please see the requirements listed above.

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Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

 

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.
View Citi’s EEO Policy Statement and the Know Your Rights poster.