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

Summary

As our engineering organization expands, we are seeking a product-focused Senior full-stack engineer to drive the growth and evolution of our products. This position is ideal for an experienced professional who prioritizes clean, reliable systems and thrives in a collaborative, fast-paced setting with a strong sense of ownership.

Job Description

What you'll do

• Execute full-stack engineering tasks utilizing Python (RESTful APIs using Flask and FastAPI with extensive use of SQLAlchemy and Pydantic), React and TypeScript.

• Design and build proprietary solutions involving insurance pricing algorithms, modeling, and data visualizations.

• Partner with product management to convert business needs into secure, high-quality production features, applying professional judgment to choose appropriate tools and architectural patterns.

• Manage the full development lifecycle: analyze requirements, architect solutions, conduct spikes, develop PoCs, and deploy scalable, thoroughly tested production code.

• Maintain and refine existing applications to ensure consistent alignment with established SLOs.

• Participate in agile ceremonies, contribute to RFC/ADR documentation, and perform peer code reviews to maintain high engineering standards.

• Enhance observability and reliability of applications/components by implementing logging, metrics, tracing, dashboards, and alerting that support incident triage, rootcause analysis, and continuous improvement.

What you'll bring

• Full-stack development: Hands-on experience in building and deploying end-to-end web applications, utilizing modern frontend tools like React and TypeScript, combined with Python-based backend APIs and major cloud infrastructures (AWS, GCP, or Azure).

• 7+ years of relevant professional experience in software development.

• Experience with some of the following: FastAPI, SQLAlchemy, Pydantic, Celery.

• Practical experience with containerization and orchestration (Docker, Kubernetes) and familiarity with CI/CD and DevOps practices and tools (TeamCity, Git-based workflows).

• Strong foundation in Algorithms, Data Structures, and performance optimization techniques for scalable applications.

• Experience with relational databases (like Postgres) and familiarity with NoSQL databases (like Redis) is an advantage.

• Proactive mindset for learning new technologies, robust work ethic, commitment to resolving technical challenges, and responsibility.

• Excellent communication skills with the ability to articulate technical concepts.

Nice to have

• Exposure to Large Language Models (LLMs) and AI development tools (Claude, Copilot).

• Data engineering background or interest, familiarity with NumPy, pandas, Polars is a plus.

• Experience with Tanstack, React Hook Form, Vite is a plus.

What's in it for you

The people we employ give their all, and in return, we offer flexibility wherever we can, such as:

• Flexible work environment

• Health and Wellness benefits

• Paid time off programs including volunteer time off

• Market-competitive pay and incentive programs

• Continual development and internal career growth opportunities

• All new hires participate in our in-person orientation process to ensure a strong start and connection to our culture.

On the PricingCenter team at Guidewire, we're tackling unique and complex challenges every day. You'll collaborate closely with talented colleagues as we build a leading-edge platform and help our clients do their best work. Our culture is grounded in hard work, creativity, collaboration, and high performance. We're looking for teammates who are curious, willing to try new things, comfortable sharing their opinions, able to move fast, and eager to think creatively.

About PricingCenter

The team responsible for building and maintaining an Insurance pricing platform, which enables insurers to build and deploy advanced pricing models. Leveraging a modern technology stack, machine learning libraries and cloud infrastructure (AWS, Docker, Kubernetes), the platform ensures scalability, performance, and security - driving higher profitability for insurers and greater satisfaction for policyholders.

The Canadian CAD base salary range for this full-time position is $126,000 - $157,000. Your base pay will depend on your experience, skills, education, training, and location among other factors. All full-time positions or part-time roles working 30 hours or more a week at Guidewire are eligible for benefits that support their health and well-being including health, dental, and vision insurance, paid time off, and a company sponsored retirement plan. In addition, some roles may be eligible for the annual company bonus plan, commissions, and/or long term incentive awards which are contingent on a variety of factors including, but not limited to, company and employee performance.

About Guidewire

Guidewire is the platform P&C insurers trust to engage, innovate, and grow efficiently. We combine digital, core, analytics, and AI to deliver our platform as a cloud service. More than 540+ insurers in 40 countries, from new ventures to the largest and most complex in the world, run on Guidewire.

As a partner to our customers, we continually evolve to enable their success. We are proud of our unparalleled implementation track record with 1600+ successful projects, supported by the largest R&D team and partner ecosystem in the industry. Our Marketplace provides hundreds of applications that accelerate integration, localization, and innovation.

For more information, please visit www.guidewire.com and follow us on Twitter: @Guidewire_PandC.

Guidewire Software, Inc. is proud to be an equal opportunity and affirmative action employer. We are committed to an inclusive workplace, and believe that a diversity of perspectives, abilities, and cultures is a key to our success. Qualified applicants will receive consideration without regard to race, color, ancestry, religion, sex, national origin, citizenship, marital status, age, sexual orientation, gender identity, gender expression, veteran status, or disability. All offers are contingent upon passing a criminal history and other background checks where it's applicable to the position.