Full-Stack Software Engineer (React, Python)

Company Description

Parabellyx is a cybersecurity testing company specializing in offensive security and offering the LUMA platform, a modular, AI-enabled continuous security testing solution. We help organizations protect applications, infrastructure, cloud systems and compliance frameworks - reducing risk, operational downtime and cybersecurity costs. Trusted by leading Canadian and U.S. organizations, Parabellyx delivers tailored guidance with exploitability validation, risk prioritization and remediation strategies. We also actively support academic institutions and startup communities by providing essential security testing components at no cost. Our services include penetration testing, application security testing and compliance (GRC) guidance for standards such as SOC 2 and ISO 27001.

Role Description

Full-time | Remote (Canada)

Parabellyx is seeking a skilled Full Stack Software Developer to join our product team full-time. This role is based in our Richmond Hill office with flexible remote options (hybrid preferred; remote considered). You will work hands-on across the stack - from design and implementation to deployment, troubleshooting and continuous improvement. We are looking for someone who enjoys solving complex problems, thinks analytically, and wants to help shape an actively evolving product.

• Candidate must be eligible to work in Canada without sponsorship.
• Must pass CPIC background check and provide references when requested.

What Makes You a Great Fit:

- 3+ years of professional experience as a full-stack software developer working within complex codebases

- Strong experience with React (primary), Python, TypeScript and Angular

- Solid understanding of software architecture principles and large-scale data systems

- Proficiency in SQL and hands-on experience with PostgreSQL, including schema design, complex queries and performance optimization

- Experience designing, developing and integrating RESTful APIs and cloud-native microservices

- Ability to work independently, manage multiple priorities and deliver in a fast-paced product environment

- Strong ownership mindset - from design through production maintenance

- Growth mindset with the ability to learn quickly, reflect on outcomes and incorporate feedback

Nice to Have:

- Experience deploying, operating and troubleshooting applications in Azure and AWS environments

- Experience building data-driven applications using Pandas, OpenAI and FastAPI

- Familiarity with Azure AD/B2C and Azure App Services

- Experience with Docker and GitHub Actions

- Familiarity with .NET development and Microsoft Graph API integration

- 5+ years of professional software development experience

- Exposure to cybersecurity products

Job Duties And Responsibilities:

- Build and evolve product features using React and Python, including transitioning functionality from legacy systems

- Design and optimize data-intensive UI experiences (dashboards, tables, filters, drill-downs, tree views)

- Work hands-on with PostgreSQL, including schema design, query optimization and performance tuning

- Collaborate with product, design and engineering teams to scope work, estimate effort and deliver iteratively

- Improve performance and scalability for large datasets (pagination, virtualization, caching, API efficiency)

- Own and evolve CI/CD pipelines, release processes and system monitoring

- Write and maintain unit, integration, and end-to-end tests to ensure stability and scalability

- Troubleshoot and resolve complex technical and performance issues in a timely manner

- Participate in code reviews, ensuring adherence to best practices and quality standards