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About the Role

As a Backend Engineer III, you will build the services, data models, and APIs that power a new greenfield platform at the core of FIQ's supply chain technology. You will write the business logic and processing workflows that everything else depends on, with a focus on data integrity, correctness, and performance. Working alongside the founding engineer and full-stack team, your work will form the reliable backbone the rest of the product is built on.

Responsibilities

Design and build backend services, APIs, and data models
Implement business logic and processing workflows
Design relational schemas and manage database migrations
Ensure data integrity, correctness, and API performance
Write tests and contribute to shared engineering standards
Integrate with external systems and data sources
Collaborate closely with full-stack engineers, product, and the platform's technical owner
Participate in code review and technical design
Help evolve the backend architecture as the platform scales

Requirements

4-6 years of experience building backend services and APIs
Strong, hands-on Python fluency; you will write production Python from day one
Experience designing and building REST APIs, ideally with FastAPI, Flask, or Django
Strong relational database skills, including schema design and SQL (PostgreSQL or similar)
Experience with ORMs and data modeling
Ability to translate requirements into robust, production-ready backend systems
Strong engineering fundamentals across performance, reliability, and maintainability
Comfort operating in a fast-moving, early-stage environment with high ownership

Skills

Python
REST APIs
FastAPI
Flask
Django
SQL
PostgreSQL
ORMs
Data modeling
AI-driven development
AI-assisted engineering workflows
LLM-integrated development
RAG
Retrieval-augmented patterns
SQLAlchemy
Alembic
Multi-tenant systems
Workflow engines
Pipelines
DAG-based processing
CI/CD
Docker
Cloud infrastructure
Calculation engines
Rules engines
Deterministic data pipelines
Logistics
Supply chain
Fintech
Data-intensive SaaS platforms

Location

Toronto

Work Type

Onsite
Hybrid
Full-Time

Experience Level

4-6 years

Salary/Compensations

$105-125K CAD per year (negotiable)

Benefits

Comprehensive health and dental coverage for you and your family
Competitive paid time off and flexible leave policies
Retirement savings programs and employer contributions
Dedicated learning and development budget
Remote and hybrid work options
Equipment allowances
Internet reimbursements
Business travel coverage
Employee stock options (ESOP), where applicable

About the Company

Fulfillment IQ is a supply chain engineering and transformation company that helps brands, retailers, and 3PLs design, build, and scale high-performance logistics operations.
We work at the intersection of strategy, operations, and technology where we solve complex, real-world problems across warehouse design, automation, order management, transportation, and end-to-end supply chain execution.
Our teams combine deep domain expertise with strong technical capability, delivering outcomes through consulting, systems implementation, and proprietary platforms that accelerate time-to-value and reduce delivery risk.
If you enjoy working in complex environments, partnering closely with clients, and seeing your work make a tangible impact on how global commerce moves, this is the place where your skills and judgment truly come to life.

Equal Opportunity

As an equal opportunity employer, we celebrate diversity and are committed to creating an inclusive environment for all team members.
Fulfillment IQ is a people-first company built on trust, collaboration, and ownership. We are proud to be an equal opportunity employer and are committed to building a diverse, inclusive, and high-performing workplace.