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Senior Full Stack Developer Jobs in Whitby, ON (NOW HIRING)

Optimize application performance, scalability, and security across the stack. * Participate in ... Troubleshoot, debug, and resolve production issues in collaboration with DevOps and QA teams.

Optimize application performance, scalability, and security across the stack. * Participate in ... Troubleshoot, debug, and resolve production issues in collaboration with DevOps and QA teams.

Our mission is simple: eliminate the friction of SR&ED claims so companies can focus on what ... of full-stack development experience, ideally in a startup or scaling environment with high ...

Apply Early

Full Stack Developer Resume Due Date: November 21st, 2025 (5:00PM EST) Number of Vacancies: 2 Level: MP4 Duration: 12 Months Hours of work: 35 hours Location: 1908 Colonel Sam Drive, Oshawa (Hybrid ...

The Engineer We're Looking For We're looking for a talented Full Stack Engineer who loves solving ... AWS Certified Developer or Solutions Architect certification * Architecture experience: Serverless ...

Senior Full-Stack Software Engineer

Toronto, ON · On-site

CA$113K - CA$163K/yr

Build and maintain CI/CD pipelines using Azure DevOps, GitHub Actions, or similar tools ... full stack software development * Professional experience as a fullstack or software engineer ...

Full Stack Engineer We are seeking a skilled Full Stack Engineer to join our dynamic team, focusing on developing features for an innovative web application aimed at transforming how individuals ...

We'd love to work with you if you have: 10+ years of working experience as a full stack developer who has experience developing with frond-end and back-end technologies. Strong front-end development ...

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Senior Full Stack Developer information

What is the difference between Senior Full Stack Developer vs Backend Developer?

AspectSenior Full Stack DeveloperBackend Developer
Required SkillsProficiency in both frontend and backend technologies, such as JavaScript, HTML, CSS, and server-side languages like Node.js, Python, or JavaSpecialized in server-side development, working with languages like Java, Python, Ruby, or PHP, and database management
Work EnvironmentCollaborates across frontend and backend teams, often involved in full project lifecycleFocuses primarily on backend systems, APIs, and database integration
Common UsageUsed in roles requiring full project oversight and versatile development skillsUsed in roles focused on server-side logic, database management, and API development

The main difference is that a Senior Full Stack Developer handles both frontend and backend development, providing a comprehensive approach to projects, while a Backend Developer specializes solely in server-side logic and database management. Both roles require strong programming skills, but the Full Stack Developer's expertise spans the entire technology stack.

How does a Senior Full Stack Developer typically collaborate with cross-functional teams during a project lifecycle?

As a Senior Full Stack Developer, you'll frequently collaborate with designers, product managers, QA engineers, and other developers to deliver end-to-end solutions. You'll be involved in requirements discussions, offer technical guidance, and help align frontend and backend development with business goals. Your role often includes code reviews, mentoring junior team members, and ensuring seamless integration across various systems. This collaborative environment encourages knowledge sharing and innovation while ensuring project success.

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

To thrive as a Senior Full Stack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, usually supported by a relevant degree and several years of experience. Mastery of tools such as Git, Docker, CI/CD systems, and cloud platforms like AWS or Azure is typically required, alongside familiarity with databases and version control systems. Strong problem-solving abilities, leadership, effective communication, and collaboration skills set exceptional developers apart. These skills and qualities are crucial for delivering robust, scalable solutions while mentoring teams and efficiently bridging gaps between client requirements and technical implementation.

What are Senior Full Stack Developers?

Senior Full Stack Developers are experienced professionals who design, develop, and maintain both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to handle servers, databases, APIs, and user interfaces. In addition to coding, they often lead development teams, make architectural decisions, and ensure software quality and scalability. Their expertise allows them to oversee the entire application lifecycle, from concept to deployment.
What cities near Whitby, ON are hiring for Senior Full Stack Developer jobs? Cities near Whitby, ON with the most Senior Full Stack Developer job openings:
Infographic showing various Senior Full Stack Developer job openings in Whitby, ON as of June 2026, with employment types broken down into 42% Full Time, 29% Part Time, and 29% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution.
Senior Full Stack Engineer

Senior Full Stack Engineer

Codal

Toronto, ON

Other

Medical, Dental, Vision, Life

Posted 9 days ago


Job description

Who you'll be working with

We ideate, create, and coordinate. We analyze, strategize, organize, and prioritize. We bridge the communication channel between the client and our project team. We chart the course and navigate the product roadmap sprint by sprint. Some of us are product owners. Some of us are scrum masters. Many of us wear multiple hats and do whatever's needed to deliver successful projects.

What you'll be doing
  • Design, develop, and maintain scalable fullstack applications using React/NextJS (TypeScript) on the frontend and Python (Django/FastAPI) or Node.js (Express/NestJS) on the backend.
  • Collaborate with Product Managers, Designers, and Engineers to translate business requirements into high-quality technical solutions.
  • Build reusable, maintainable, and performant UI components and backend services
  • Develop and integrate RESTful and/or GraphQL APIs, ensuring reliability and scalability
  • Contribute to architecture discussions and help define best practices across frontend and backend systems.
  • Ensure code quality through code reviews, unit/integration testing, and adherence to engineering standards.
  • Optimize application performance, scalability, and security across the stack.
  • Participate in agile ceremonies including sprint planning, standups, and retrospectives.
  • Troubleshoot, debug, and resolve production issues in collaboration with DevOps and QA teams.
  • Mentor junior engineers and contribute to a culture of continuous improvement and learning.
What you'll need to be successful (Requirements)
  • Minimum of 4+ years of hands-on development experience in fullstack development
  • Strong proficiency in React/NextJS (TypeScript), including state management (e.g., Redux, Context API) and modern frontend practices
  • Solid experience with backend development using Python (Django, FastAPI) or Node.js (Express, NestJS)
  • Experience designing, implementing and consuming RESTful APIs and/or GraphQL API services
  • Strong understanding of database design and experience with relational databases (e.g., PostgreSQL, MySQL)
  • Familiarity with cloud platforms such as AWS, GCP, or Azure
  • Experience with version control (Git) and CI/CD pipelines through github actions
  • Strong problem-solving skills and ability to work in a fast-paced, client-facing environment
  • Excellent communication skills and ability to collaborate across cross-functional teams
  • Experience working in agile or scrum-based environments
  • Familiarity with cloud-based logging, monitoring, and security tools
Bonus Points for these (Preferred Experience)
  • Experience with headless CMS platforms (e.g., Contentful, Contentstack, Sanity)
  • Familiarity with eCommerce platforms (e.g., Shopify, BigCommerce, Saleor)
  • Experience with microservices architecture and containerization (Docker, Kubernetes)
  • Knowledge of DevOps practices, infrastructure-as-code (Terraform, CDK), and monitoring tools (Prometheus, Grafana)
  • Experience working on healthcare, fintech, or regulated industry projects
  • Experience with Data analytics platforms like GCP BigQuery, snowflake
Need another reason to hit the "apply" button?
  • Codal is a global agency with over 250 employees, and offices in the US, UK, Canada and India.
  • We regularly host happy hours, fun friday, dinners, excursions, and other company events to unwind after a hard day at work.
  • Professional Development: Opportunities for training, workshops, conferences to enhance employees' skills and knowledge.
  • We offer Medical, Life, Dental/Vision, and many more insurance types 
  • An office in the heart of downtown Toronto with easy access to Union Station
  • Working hybrid for in-person collaboration and sprint-planning days