Senior Full-Stack Developer – Backend-Leaning (Platform & Monetization) - Toronto, On

Dokainish & Company; Toronto; On-site; CAD 90,000 - 120,000; Full time

Job summary

A leading consultancy firm in Toronto is seeking a Senior Full-Stack Developer. This full-time, non-remote position involves building enterprise-grade SaaS platforms, managing payment processing, and ensuring the security of systems. Candidates should possess over 5 years of software development experience, strong TypeScript skills, and a background in deploying security-conscious systems. If you are ready to take a foundational role in an innovative company, we encourage you to apply.

Qualifications

• 5+ years of professional software development experience.
• Strong experience with TypeScript across backend and full stack.
• Experience with relational databases and data modeling.
• Experience building security-conscious production systems.
• Familiar with Docker and cloud environments.

Responsibilities

• Own key areas including platform infrastructure, payments, and subscriptions.
• Design and implement payment processing and subscription models.
• Migrate applications from development to production infrastructure.
• Apply security principles across systems.
• Build and evolve backend features alongside platform work.

Skills

TypeScript

Relational databases

Docker

Python

GitHub collaboration

Software development

Security-conscious systems

SaaS billing systems

AI agents

Deployment processes

Job description

Senior Full-Stack Developer – Backend-Leaning (Platform & Monetization)

About Dokainish& Company

Since 2011 Dokainish& Company has been providing world class professional consultancy services.

We specialize in working diligently and collaboratively with our clients to achieve long-lasting and impactful results across numerous business functions. Our areas of expertise include, but are not limited to, Project Management, Quantitative Risk Analysis, Organizational Change Management, Project Controls, Enterprise Reporting, Estimating, Asset Management, and System Implementation for Capital Projects. We draw upon decades of project experience to deliver customized solutions to our clients’ most complex challenges.

We are a fast-growing organization, currently seeking a Senior Full-Stack Developer to take a foundational role in building and operating enterprise-grade SaaS platforms.

Important: Please provide a link to one or more of the following: GitHub profile, technical portfolio, architecture documentation, or public project write-up on your resume.

Role Overview

You will own key areas including platform infrastructure, payments and subscriptions, deployment processes, security, and AI-enabled backend capabilities, while continuing to build core product features.

This role requires broad ownership across the full software lifecycle and strong engineering judgment.

This is a full-time, non-remote position based in Toronto, Ontario, Canada.

Platform & Monetization

• Design and implement payment processing and subscription models
• Build and maintain feature entitlements, access control, and usage limits
• Ensure correctness across billing workflows (upgrades, downgrades, cancellations, failures)

Deployment & Infrastructure

• Migrate applications from development environments to production infrastructure
• Set up and maintain development, staging, and production environments
• Implement CI/CD pipelines, secrets management, and database migrations
• Ensure deployments are safe, repeatable, and observable

  Security & Reliability

  • Apply security-by-default principles across systems
  • Implement RBAC, audit logging, and secure data handling
  • Identify and mitigate risks related to credentials, data access, and AI usage

  AI Agents & Backend Integration

  • Design and implement AI-backed services and agent workflows
  • Manage prompt versioning, validation, logging, rate limiting, and cost controls
  • Ensure AI outputs are reviewed and appropriate for production use

  Continued Feature Development

  • Build and evolve backend features alongside platform work
  • Refactor and harden AI-assisted code when required
  • Maintain long-term code quality and maintainability

  Collaboration & Mentorship

  • Work in GitHub using feature branches, pull requests, and reviews
  • Mentor junior developers through reviews, pairing, and design discussions
  • Collaborate closely with the Engineering Manager and frontend-leaning full-stack developer

  Required Skills & Experience

  • 5+ years of professional software development experience
  • Strong TypeScript experience across backend and full stack
  • Experience with relational databases and data modeling
  • Experience building and operating security-conscious production systems
  • Experience with SaaS billing systems
  • Familiarity with Docker and cloud environments
  • Exposure to Python for automation or backend tooling
  • Experience working with AI agents or AI-driven workflows
  • Strong GitHub collaboration experience
  • Comfort owning requirements, development, testing, and deployment

  Working Arrangements

  • Must be based in Toronto, Ontario, or willing to relocate.
  • This is a full-time, non-remote position based in Toronto, Ontario, Canada.
  • Legally eligible to work in Canada.

  We are highly skilled when moving ideas into actions and empower each other to deliver outstanding results. If you believe your skillset, drive, qualifications, and experience is a match, we welcome your application and can’t wait to hear from you.

  We thank all applicants for their interest in joining Dokainish& Company, please note only those candidates considered for an initial interview will be contacted.

  Dokainish& Company is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to age, gender, race, colour, religion, sexual orientation, gender identity, national origin, disability, age, and veteran status, or any other protected status required by applicable law.

  In accordance with the Ontario Human Rights Code, Accessibility for Ontarians with Disabilities Act, 2005, and Dokainish& Company AODA Policy, accommodation will be provided in all parts of the hiring process. Applicants need to make their needs known in advance.