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Added 4 months ago
VG
open saved [VO2 Canada] - Développeuse.eur Back-End- Missions Ponctuelles
VO2 GROUP
Montreal, Quebec
- Full-time
We are present in Paris, Montreal, Luxembourg, Shanghai, New York, and Geneva, with over 800 consultants 🇫🇷🇨🇦🇨🇳🇺🇸🇨🇭.
Added 1 month ago
TC
Machine Learning Engineer - Express Scripts Canada
The Cigna Group
Mississauga, ON
- Full-time
- Other
The role blends hands-on data engineering (Oracle + ETL), model development (unsupervised learning), and API serving (Python/FastAPI), with close collaboration across business teams. You’ll…
Added 3 months ago
CH
Machine Learning Engineer - Express Scripts Canada
Cigna Healthcare
Mississauga, ON
- Full-time
The role blends hands-on data engineering (Oracle + ETL), model development (unsupervised learning), and API serving (Python/FastAPI), with close collaboration across business teams. You’ll…
Added 2 months ago
Senior Software Engineer (Senior AI Engineer)
Scotiabank
Toronto, ON
Experience with Python, particularly FastApi, Gemini (or any LLM Provider) API development, Asyncio/multiprocess management tooling is strongly preferred
Added 3 months ago
S&
Lead Underground Transmission Line Engineer 2 - Grid
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- Full-time
Work and coordinate with vendors and clients to specify transmission line components.
Added 3 months ago
S&
Senior Underground Transmission Line Engineer 2 - Grid
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- Full-time
Work and coordinate with vendors and clients to specify transmission line components.
Added 3 months ago
AG
R2026-297 Senior Software Engineer
Adelphi Group
Toronto, ON
- Full-time
As a Senior Software Engineer - Full Stack with Perpetua, you will contribute to our core platform built primarily with Python, Django, React, TypeScript, BigQuery, and GCP. You will help…
Added 2 months ago
MS
Java Tech Lead (Hybrid)
Morgan Stanley
Montreal, QC
- Full-time
Design, develop, and enhance applications supporting the ingestion, mastering, and distribution of Securities Reference Data (SRD), with a focus on Index and ETF reference data.
Added 2 months ago
A
Senior Applied AI/ML Developer (AutoCAD & Civil 3D)
Autodesk
Toronto, ON · AMER - Canada - Ontario - Toronto - University Ave
- Full-time
Familiarity with AutoCAD, Civil 3D, or other AEC/design software (as a user or developer via their APIs/SDKs)
Added 2 months ago
AN
Expert/Principal Software Engineer
Arista Networks
Vancouver, BC
- Full-time
…intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current…
Added 3 months ago
N
Intermediate Digital Hardware Design Engineer
Nokia
Canada
- Full-time
Applied R&D (AR) consists of target-oriented research either with the goal of solving a particular problem / answering a specific question or for multi-discipline design, development, and…
Added 3 months ago
S
Portfolio Analyst / Analyste de portefeuille
Sagard
Montreal, QC
- Full-time
Advanced Excel skills and strong data manipulation capabilities; experience with SQL, Python, or workflow automation tools is an asset.
Added 2 months ago
TH
Manager, Data Science (Askuity division)
The Home Depot
Toronto, ON
- Full-time
…to keep learning, consider starting or growing your career with us at The Home…
Added 2 months ago
Digital Process Coordinator (contract)
Aecon
Sherwood Park, AB
Assist with light scripting or coding tasks (e.g., SQL queries, Python for automation support, data prep).
Added 3 months ago
PR
Senior Robotics Software Developer
Promise Robotics
Calgary, AB
- Full-time
We’re looking for a Senior Robotics Software Developer to join our team and contribute to developing cutting-edge solutions for our core robotic manufacturing technologies. This is a senior…
Added 3 months ago
FC
Analyst Advanced Analytics
Fidelity Canada
Toronto, ON
- Full-time
Experience with visualization software (Tableau, Power BI), Python and SQL
Added 3 months ago
FC
Sr. Analyst Advanced Analytics
Fidelity Canada
Toronto, ON
- Full-time
Hands-on experience with statistical modelling techniques using python
Added 2 months ago
E
Technical Lead / Senior Developer - Software Development
EY
Toronto, ON
- Full-time
At EY, we’re all in to shape your future with confidence.
Added 1 month ago
V
Senior Software Engineer
Voices
ON · Ontario, Canada
- Full-time
…and deliver solutions that balance immediate business needs with long-term technical…
Added 1 month ago
F
Staff Software Engineer - Code Authoring
Forerunner
Kitchener, ON
- Full-time
…enables product engineering teams to build and operate software with unmatched speed and quality. The Code Authoring team owns the developer environment at Faire: the AI coding tools…
Added 2 months ago
P
Senior Applied Researcher AI/ML ( CAD)
PointClickCare
Canada
- Full-time
At PointClickCare our mission is simple: to help providers deliver exceptional care. And that starts with our people. As a leading health tech company that’s founder-led and privately held,…
Added 3 months ago
UO
Artificial Intelligence Systems Team Lead, Enterprise Architecture Data Management
University of Saskatchewan
Saskatoon, SK
- Full-time
Strong development skills in Python or Java with solid software engineering fundamentals is preferred
Added 4 months ago
S
Senior Backend & Infrastructure Engineer
Scispot
Remote, Canada
- $80,000 to $120,000 CAD / year
- Full-time
- Remote
You will work closely with the founders and product engineers.
Added 4 months ago
P
Senior Frontend Engineer
Procurify
Remote, Canada
- $137,000 to $152,000 CAD / year
- Full-time
- Remote
You’re a person with a knack for solving some of the most pressing technology challenges in SaaS application development while leveling up the team of engineers around you, and you’re eager…
Added 4 months ago
HM
Data Engineer
Hotspex Media
Toronto, Ontario
- $85,000 to $115,000 CAD / year
- Full-time
Location: Hybrid with the option for Remote if Outside Greater Toronto Area (must be legally authorized to work in and based in Canada)

The Cigna Group

Machine Learning Engineer - Express Scripts Canada

Mississauga, ON, L5N 8G6, Canada

Hybrid

Pay Range: $115,000 - $125,000 annually · Full-time

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Job details

Pay: Pay Range: $115,000 - $125,000 annually
Job type: Full-time
Workplace: Hybrid
Posting language: English
Posted: Sep 7, 2026

Original job description

Job Description

Job Title: Machine Learning Engineer

Location: Mississauga
Employment Type: Full-time

Reason for Vacancy: Replacement

Work Arrangement: Hybrid
Department Name: Application Delivery Department

Pay Typed: Salaried

Pay Range: $115,000 - $125,000 annually

Please note that this is a general posting range and offer range will be varied based on relevant experience, qualifications, skills required and location for this role.

About Us

Express Scripts Canada (ESC) is the leader in health benefits management. Serving over 12 million members, we help insurance carriers, third party administrators, and the public sector optimize the value of health benefits by linking the talent and professional expertise of our people with leading edge

information management systems and technology. Express Scripts Canada is a wholly owned subsidiary of Express Scripts, one of the largest pharmacy benefit management (PBM) companies in North America, part of The Cigna Group (NYSE: CI), a global health company. Together, we deliver innovative,

cost-effective solutions that improve access, affordability, and health outcomes for Canadians.

Job Summary

Express Scripts Canada is looking for a Machine Learning Engineer to join our Team. The successful candidate will design, build, and operate data pipelines and ML services that detect unusual patterns in healthcare claims and pharmacies.

The role blends hands-on data engineering (Oracle + ETL), model development (unsupervised learning), and API serving (Python/FastAPI), with close collaboration across business teams. You’ll ensure the best possible performance, quality, and responsiveness of the applications and pipelines, and help maintain code quality, organization, and automation.

Key Responsibilities:

Design & implement ML data pipelines to ingest, engineer, and persist features from Oracle (SQLAlchemy/oracledb), including robust logging, argument-driven CLI tools, and environment-based configuration (.env).
Build and validate unsupervised ML models (e.g., MiniBatchKMeans/KMeans, DBSCAN) with dimensionality reduction (TruncatedSVD/PCA), leveraging chunked processing and sparse matrices for large datasets; evaluate using silhouette/Calinski-Harabasz/Davies-Bouldin and stability checks.
Serve models as REST APIs (ie. FastAPI/Pydantic) with health endpoints, CORS, structured response models, and joblib artifact loading; instrument application logs and operational run scripts.
Orchestrate end-to-end validation (DB → feature engineering → API scoring → curated outputs), writing curated results back to Oracle tables and creating/maintaining schemas and DDL where required.
Collaborate with business teams to interpret clusters/risk buckets, explain top contributing features, and incorporate feedback loops into subsequent runs and outputs.
Support deployment workflows in sandboxed/on-prem environments; participate in CI/CD (e.g., Jenkins/OpenShift pipelines) as part of model operationalization.
Ensure performance, quality, and responsiveness of data pipelines and APIs; help maintain code quality, organization, and automation; perform code reviews and follow Agile ceremonies.
Understand how AI is interpreting the data set and use that understanding to build prompt that lead to expected outcomes
Develop and maintain AI pipelines including data preprocessing, feature extractions, model training, and evaluation

What We’re Looking For

5+ years application development experience;3–5 years of professional experience in data science / machine learning engineering with Python, including productionizing data pipelines or ML services
Bachelor’s degree in Computer Science, Data Science, Engineering, Mathematics, or a related field (or equivalent practical experience).
Core programming (Python): Strong with NumPy, pandas, scikit-learn, SciPy (sparse), joblib, CLI (argparse), and data visualization (matplotlib/seaborn).
Modeling (Unsupervised): Practical experience with MiniBatchKMeans/KMeans, DBSCAN, TruncatedSVD/PCA, cluster evaluation (silhouette, CH, DB), and stability/bootstrapping.
Data engineering and Oracle: Writing performant SQL; using SQLAlchemy and oracledb for reads/writes; creating tables/DDL; batch inserts; column/type normalization.
ETL pipelines: Feature engineering over large volumes with chunked processing, environment-aware configs (.env), robust logging, and CSV/DB outputs.
APIs and integration: Batch prediction flows via REST (e.g., httpx client) and schema-compatible exports
Version control and CI/CD: Proficient with Git; familiarity with Jenkins/OpenShift pipelines and on-prem deployment constraints.

Experience in Healthcare domain with exposure to Fraud, Waste, and Abuse detection in pharmacy/claims, risk scoring thresholds, and audit support artifacts considered a strong asset.
Experience with on-prem, masked datasets and familiarity with Docker/OpenShift deployment patterns for ML APIs.

Why Join Us

Competitive compensation, benefits and pension plan
Career development and advancement opportunities
A culture that celebrates innovation and collaboration
Flexible work options and wellness programs

Pre-Employment Requirements

All offers of employment are conditional upon the successful completion of reference checks and background verification in accordance with company policy. Within ESC, for certain positions, obtaining and maintaining a federal government security clearance is a bona fide occupational requirement. Candidates applying for such roles must meet all eligibility criteria for the applicable clearance level and consent to the security screening process as mandated by federal regulations. Failure to obtain or maintain the required clearance will result in withdrawal of the offer or termination of

employment.

Our hiring process includes AI-powered tools to conduct video interviews, take notes and score candidates; however, all scores will be reviewed by hiring managers and our Talent team before making a decision.

Express Scripts Canada is a Cigna company

Express Scripts Canada is a subsidiary of Express Scripts, a Cigna company. Cigna Corporation (NYSE: CI) is a global health service company dedicated to improving the health, wellbeing and peace of mind of those we serve. Cigna offers an integrated suite of health services through Cigna, Express Scripts, and our affiliates including medical, dental, behavioural health, pharmacy, vision, supplemental benefits, and other related products.

About Express Scripts Canada

Express Scripts Canada is a leading health benefits manager and has been recognized as one of the most innovative. Our clients include Canada's leading insurers, third party administrators and governments. We work with these clients to develop industry-leading solutions to deliver superior healthcare in a cost-controlled environment. We provide Active Pharmacy™ services to more than 7 million Canadian patients and adjudicate more than 100 million pharmacy, dental, and extended health claims annually. Through our proprietary consumer intelligence, clinical expertise, and patients-first approach, we promote better health decisions for plan members, while managing and reducing drug benefit costs for plan sponsors.

It will be a condition of employment that the successful candidate obtains an Enhanced Reliability Clearance from the Federal Government. The candidate will be required to provide supporting documentation to receive clearance if required.

We offer a competitive salary and benefits package, along with a positive work environment built on solid corporate values, integrity, mutual respect, collaboration, passion, service and alignment.

We are an equal opportunity employer that promotes a diverse, inclusive and accessible workplace. By embracing diversity, we build a more effective organization that empowers our employees to be the best that they can be.

We are committed to creating a working environment that is barrier-free and we are prepared to provide accommodation for people with disabilities.

If you require accommodation in completing the online application process, please email: eschr2@express-scripts.com Do not email eschr2@express-scripts.com for an update on your application or to provide your resume as you will not receive a response.

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More about this job

Responsibilities

The Machine Learning Engineer will design, build, and operate data pipelines and ML services to detect unusual patterns in healthcare claims. They will also collaborate with business teams to interpret model outputs and ensure the performance and quality of data applications.

Requirements

Candidates must have 5+ years of application development experience and 3-5 years of professional experience in data science or machine learning engineering. A bachelor's degree in a relevant field such as Computer Science, Data Science, or Engineering is required.

Skills

Python
Machine Learning
Data Engineering
Oracle
SQL
FastAPI
Unsupervised Learning
ETL
NumPy
Pandas
Scikit-learn
Docker
OpenShift
Jenkins
Git
Data Pipelines

Benefits

Competitive compensation
Benefits package
Pension plan
Career development opportunities
Wellness programs

Visa sponsorship

Not detected in the job text

Keywords

Machine Learning
Data Engineering
Python
Oracle
SQLAlchemy
FastAPI
Unsupervised Learning
DBSCAN
KMeans
ETL
Data Pipelines
REST APIs
CI/CD
Jenkins
OpenShift
Docker
Healthcare
Fraud Detection
Risk Scoring
NumPy
Pandas
Scikit-learn
Data Science
Agile
Git
Feature Engineering
API Development
Database Management
Cloud Infrastructure
Security Clearance

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