Freelance Full Stack Developer Jobs in Aurora, ON

Your Moneris Career - The Opportunity: Senior Full Stack Developer

Design and build secure, scalable backend services, integrations, and content-driven frontends that unify SaaS platforms, enterprise systems, and AI capabilities into cohesive digital products.

You will join a team building the integration backbone that connects enterprise platforms - CRM, content, communications, and data systems - with emerging GenAI (Generative Artificial Intelligence) capabilities embedded into customer and employee experiences. You will shape architecture across APIs, event-driven pipelines, and responsive frontends, working in a multi-cloud environment with Infrastructure as Code, secure authentication flows, and enterprise compliance. You will partner with Product, Data, and business teams, navigate architecture and security reviews, and uphold Shift-Left SDLC discipline. Expect meaningful mentorship, influence over technical direction, and room to evolve tooling and practices for speed, quality, and long-term maintainability.

Location: You will be based in our Toronto office, balancing in-office collaboration with remote flexibility.

Reporting Relationship: You will report to the Manager of Software Development

Posting Type: New Position

Salary Range: The expected base salary range for this role is $100,000 - $142,000

Total compensation may also include variable or discretionary incentive components, including but not limited to bonuses and commissions. Individual job offers are determined by various factors, including experience, education, skills, certifications, and other business needs.

Your Moneris Career - What you'll do:

• Design and build secure, scalable backend services and integration layers spanning SaaS, enterprise, and AI capabilities.

• Design, build, and maintain APIs, webhooks, and service-to-service integrations across internal and third-party systems.

• Build content-driven frontend applications backed by APIs, turning structured content and data into responsive user experiences.

• Integrate AI and GenAI capabilities into customer- and employee-facing digital products.

• Implement secure authentication and authorization flows meeting enterprise security and compliance requirements.

• Build event-driven pipelines and data flows powering product features, automation, and analytics.

• Manage cloud infrastructure and deployments using Infrastructure as Code such as Terraform or Bicep.

• Mentor engineers through code reviews, pairing, and knowledge sharing to raise team capability.

Your Moneris Career - What you bring:

Required qualifications:

• 7+ years building production-grade software across backend and frontend, spanning system integration and content-driven web applications.

• Strong experience designing and maintaining APIs and service-based or event-driven architectures, with hands-on third-party SaaS and enterprise integration.

• Strong proficiency in a modern backend language (Java, C# / .NET, Node.js, Go, or similar) and a modern frontend framework (React, Angular, Vue, or similar).

• Hands-on experience with a major cloud platform (Azure, AWS, or GCP) across compute, identity, messaging / eventing, and serverless.

• Experience implementing secure authentication and authorization flows within security and compliance requirements.

• Solid SQL, data modeling, and Infrastructure as Code (Terraform, Bicep, or similar) experience.

• Strong knowledge of Shift-Left SDLC practices including unit and integration testing, delivered in Agile teams using Jira and Confluence.

Preferred qualifications:

• Experience with headless / decoupled content architectures and framework supporting server-side or static rendering.

• Experience integrating AI or GenAI platforms into digital products.

• Familiarity with analytics, logging, monitoring, and streaming / event-driven patterns at scale.

• Experience in fintech, payments, SaaS, or other regulated environments.

Your Moneris Career - What you get:

• At Moneris, we believe in empowering you to succeed-personally and professionally. As part of our team, you'll have access to resources, opportunities, and an inclusive environment that supports your development and career.

• Comprehensive Total Rewards Program, including performance-based bonuses, flexible benefits starting from day one, and your choice of a health spending account (HSA) or personal spending account (PSA)

• Retirement planning support, with profit-sharing programs including company match and a defined contribution pension plan

• Growth & development opportunities, including unlimited access to Coursera, mentorship programs, and an internal gig marketplace

• Holistic wellness support, with an Employee & Family Assistance Program, 24/7 virtual healthcare, and workplace wellness initiatives

• Flexibility that works for you, including hybrid work arrangements, a Work from Abroad program, and paid time off programs

• Recognition and rewards, with company-wide recognition programs, exclusive banking perks from RBC & BMO, and access to great employee discounts

We understand that systemic barriers may contribute to imposter syndrome for some candidates. We encourage you to apply even if you do not meetevery qualificationlisted.

• #LI-Hybrid

• #TECH-IND

Note: We welcome and encourage applications from Indigenous peoples, people of colour, people with disabilities, people of all genders, sexual orientation and intersectional identities.

AI Disclosure: We may use AI-enabled tools to screen, select, and assess applications. All AI outputs are reviewed and validated by our recruitment team.

We acknowledge that people from equity-deserving groups (including racialized individuals, women, gender diverse individuals, individuals with disabilities, neurodivergent individuals, members of 2SLGBTQIA+ communities and those born outside of Canada) are less likely to apply for jobs unless they feel they meet all the requirements posted. At Moneris, we believe candidates bring experience to their work in many ways. We encourage you to apply and share, in the application form, the transferrable experience you bring, and how this will support your success in this role.