Senior Software Engineer

S.i. Systems • 6-month contract • Python • 4 days ago
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Salary
≈ $74k – $134k per year (Estimated)
Location
In office (Toronto)
Seniority
Senior
Employment
Contractor

First seen by Alion on Oct 21, 2026.

Overview
Company
Impact
Profile match

S.i. Systems

S.i. Systems is one of Canada's largest IT staffing and talent recruitment agencies, specializing in contract staffing, direct-hire placements, contractor payrolling, and IT project solutions. Headquartered in Calgary, Alberta - with major offices across Toronto, Vancouver, Ottawa, and other key metropolitan centers - the firm connects organizations with highly skilled technology professionals across cybersecurity, software development, cloud infrastructure, enterprise systems, and data analytics. Backed by an extensive nationwide network of pre-screened IT contractors, it supports corporate and public sector clients navigating large-scale digital transformations and complex technical initiatives.
sisystems.com • HQ: Calgary, Canada • IT Staffing & Staff Augmentation • Information Technology • Professional Services • 1001-5000 employees • Est. 2006
Backed by TorQuest Partners

6 Month Contract + Extension

37.5 Hrs/Week

Toronto, ON

4 Days Onsite


Must Haves

  • 10+ years in Software Engineering delivering enterprise applications with independent ownership
  • Strong Python development in enterprise environments
  • Development of RESTful APIs and backend services
  • Hands-on AWS cloud-native application development and CI/CD pipeline delivery
  • Prior consulting, advisory, or client-facing delivery experience

 

Nice to Have

  • Workflow automation experience
  • CI/CD tooling including GitHub Actions
  • Workflow orchestration experience
  • Terraform infrastructure as code experience
  • Capital markets experience

 

Responsibilities

  • Own timelines, deliverables, scope, dependencies, and execution risks
  • Design and deliver software solutions by engaging stakeholders and clarifying requirements
  • Build backend services and RESTful APIs
  • Develop cloud-native applications in AWS environments
  • Implement workflow automation and data pipelines
  • Contribute across the software development lifecycle including CI/CD
  • Ensure solutions are production-ready through testing, documentation, and handover
Disclaimer:
AI may be used in evaluating candidates.
This posting is for an existing vacancy.
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