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S.i. Systems
API Full Stack Developers to participate in the application lifecycle, contributing to coding,S.i. Systems • Toronto
API Full Stack Developers to participate in the application lifecycle, contributing to coding,

API Full Stack Developers to participate in the application lifecycle, contributing to coding,

S.i. Systems • Toronto
30+ days ago
Job type
  • Full-time
  • Permanent
Job description

Permanent Full Time

Hybrid: Downtown Toronto,(In-office days: Monday, Thursday, Friday)

2 openings: Intermediate (3+ years of experience), Senior (8+ years of experience)

Project Overview

The client is building an Enterprise API platform to consolidate multiple APIs from different teams/applications into a single, coherent catalog — accessible by both external clients and internal teams. Key workstreams include:

· Building and exposing new APIs

· Middleware/system integration development

· Publishing and maintaining APIs in production

· Supporting internal dev teams onboarding onto the API infrastructure

Your Role:

  • Participate in the application lifecycle, contributing to coding, debugging, and continuous improvement under the guidance of senior team members
  • Develop and maintain Microservices using Python, Node.js, React, and SQL
  • Heavy focus on API building and versioning
  • Gather and help address technical and design requirements in collaboration with Architecture and DevOps teams
  • Create and execute test cases aligned to user stories, including UI performance testing, to ensure quality coverage
  • Participate in peer code reviews, both giving and receiving feedback to grow your skills and uphold team standards
  • Use AI coding assistant tools responsibly — validating outputs, ensuring accuracy and security, and developing sound engineering judgment
  • Support production systems for your products — contributing to incident triage, resolution, and root cause analysis with team support
  • Communicate proactively on task progress and take ownership of assigned deliverables
  • Intermediate Full Stack Developer

Must Haves:

  • You must have a Bachelor's Degree in Computer Science, Engineering, or equivalent
  • 3+ years of application development experience
  • API experience is a must
  • Hands-on experience with React and Node.js and/or Python or GoLang
  • Exposure to cloud platforms (AWS, Azure, or GCP)
  • Experience using AI coding assistant tools (e.g., GitHub Copilot, Cursor, Amazon Q) with an understanding of responsible usage
  • Familiarity with CI/CD tools and project management tools such as JIRA
  • Excellent communication skills - this is key

Differentials:

  • Experience with AWS services such as Lambda, S3, ECS, etc.
  • Experience in the financial services industry, especially if related to fund accounting.

Salary Range: CAD $, - CAD $,

2.Senior Full Stack Developer

Must Haves:

  • You have a Bachelor’s Degree in Engineering, Computer Science or equivalent.
  • Proven experience using AI coding agents
  • API experience is a must
  • 8+ years of Application Development experience
  • 3+ years of programming experience in NodeJs/Python/GoLang
  • 3+ years of experience with cloud technologies such as AWS, Azure, GCP
  • Experience with CICD tools such as Jenkins, Bamboo or CodePipeline
  • Experience with Project Management tools such as JIRA
  • Knowledge of financial industry is highly desirable
  • Excellent verbal and written communication skills with the ability to interact effectively in a global team environment

Salary Range: CAD $,-$,



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API Full Stack Developers to participate in the application lifecycle, contributing to coding, debugging, and continuous improvement • Toronto

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