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Added 38 mins ago
Ingénieur·e principal·e (Postes électriques) / Primary Engineer (Substations)
Hitachi
Montreal, QC · (HE)Office_QC, Saint-Laurent
Full-time
Join Hitachi Energy's Grid Integration business as a Primary Engineer (Substations). In this role, you will contribute to the design and delivery of high-voltage AIS and GIS substation…
Added 38 mins ago
Chef de projet – Ingénierie/Project Management Engineering
Hitachi
Montreal, QC · (HE)Office_QC, Saint-Laurent
Full-time
Join Hitachi Energy's Grid Integration business and play a key role in delivering critical electrical infrastructure that supports reliable, safe, and efficient power systems. As a Project…
Added 1 hour ago
Chef de projet – Ingénierie/Project Management Engineering
Hitachi Energy
Montreal, QC
Full-time
Join Hitachi Energy's Grid Integration business and play a key role in delivering critical electrical infrastructure that supports reliable, safe, and efficient power systems. As a Project…
Added 2 hours ago
Silicon Validation Engineer
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Mississauga, ON
Full-time
Support customer engagements by demonstrating IP performance, troubleshooting integration issues, and building confidence in our solutions
Added 3 hours ago
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Ottawa, ON
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Selection process number: 25-MOT-EA-HRS-06088
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Investigate and resolve issues reported during product verification and customer integration.
Added 3 hours ago
Software Engineering LMTS
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Full-time
The software engineer role at Salesforce encompasses architecture, design, implementation, and testing to ensure we build products right and release them with high quality. Equally…
Added 5 hours ago
Embedded Software Engineer
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Contract
Job Title: Expert Level Embedded Software Engineer
Added 6 hours ago
Building Structural Engineer
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Full-time
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Added 6 hours ago
Building structural Engineer
BPA
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Added 6 hours ago
Building structural Engineer
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Repentigny, QC
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Added 7 hours ago
Forward Deployed AI Engineer
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Toronto, ON
$60,000 to $90,000 CAD / year
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Deploy and support delivered systems. Follow our release process with rollback plans and operating documentation; provide support within the engagement's coverage.
Added 7 hours ago
Software Engineer I (Cobol Developer)
TD
Toronto, ON
Full-time
…Contribute to application development, production support, system integration, modernization initiatives, and continuous improvement of engineering…
Added 8 hours ago
Senior Embedded Software Designer
Kepler Communications Inc.
Toronto, ON
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We're on the hunt for a top-tier Embedded Software Engineer. Your focus will be on software development and maintenance required for both space and ground-based assets for a growing fleet…
Added 8 hours ago
ASICS Design Verification Engineer - Multiple levels
Qualcomm
Vancouver, BC
Full-time
Bachelor's degree in Science, Engineering, or related field and 2+ years of ASIC design, verification, validation, integration, or related work experience.
Added 8 hours ago
Robotics Engineer - Edge Runtime, Physical AI Hub, Kitchener
Siemens
Kitchener, ON
Full-time
We are seeking a Robotics Engineer - Edge Runtime to help build and optimize the edge software layer for the Physical AI Runtime. This engineer will work on edge development, robotics…
Added 8 hours ago
Intermediate Product Reliability Engineer
Siemens Healthineers
Ottawa, ON · YOW B
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Under the supervision of the Manager, Assay Performance and Support, the Intermediate Product Reliability Engineer is responsible for ensuring continued correct sensor calibration,…
Added 8 hours ago
Software Engineer P2 - PA2026JBGRAD02
SS&C Technologies
Toronto, ON
Full-time
The Financial Services Group at SS&C is currently hiring a Software Engineer. This engineer will be responsible for analyzing, designing, programming and modifying software enhancements…
Added 10 hours ago
Intermediate Product Reliability Engineer
Siemens Healthineers
Ottawa, ON
Full-time
Under the supervision of the Manager, Assay Performance and Support, the Intermediate Product Reliability Engineer is responsible for ensuring continued correct sensor calibration,…
Added 10 hours ago
STA/Constraints Engineer
AMD
Vancouver, BC
$128,000 to $192,000 USD / year
Full-time
The STA/Constraints Engineer is responsible for developing FullChip constraints and timing closure. Person will work closely with Fellows, Principal Engineers, Architects, collaborate with…
Added 10 hours ago
AI Platform Engineer, Silicon Design Infrastructure
AMD
Markham, ON
$155,200 to $232,800 USD / year
Full-time
We are seeking a hands-on engineer to build and operate the development infrastructure and AI solutions that underpin AMD's AI-assisted silicon design program. This role sits at the…
Added 10 hours ago
QA Automation Engineering Consultant
CGI
Toronto, ON
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We are seeking an experienced QA Automation Engineer to support enterprise branch-banking applications deployed across on-premises and Google Cloud Platform (GCP) environments. The…
Added 11 hours ago
AICS Design Verification Engineer- Multiple levels
Qualcomm
Vancouver, BC
Full-time
Bachelor's degree in Science, Engineering, or related field and 2+ years of ASIC design, verification, validation, integration, or related work experience.
Added 11 hours ago
Engineering Specialist Optics
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Montreal, QC
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The technical specialist engineering class 4 works under the supervisor of an engineer or his delegate. Performs a variety of functions associate with the optical, electrical, electronic,…
Added 11 hours ago
FPGA Design Engineer
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Ottawa, ON · Kanata, ON
Contract
Stefanini is looking for FPGA Design Engineer with Radio experience (Onsite Role) in Ottawa, Ontario, Canada

Closed listing

Cigna Healthcare

Machine Learning Engineer - Express Scripts Canada

Mississauga, ON, Canada

Pay: Pay Range: $115,000 - $125,000
Job type: Full-time
Workplace: Hybrid
Posting language: English
Posted: Sep 30, 2026

This opening has closed.

The original listing is kept below for reference.

Find open jobs More jobs with this employer

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Original job description

Archived listing. The details below describe a past opening.

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

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.

NOTE: Internal candidates should apply before April 17, 2026.

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.

About employer

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 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 is required, along with proficiency in Python, SQL, and unsupervised modeling techniques.

Skills

Python
Machine learning
Data engineering
Oracle
SQL
FastAPI
Unsupervised learning
ETL pipelines
Scikit-learn
Pandas
NumPy
Data pipelines
API development
CI/CD
Git

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
Healthcare
Fraud Detection
CI/CD
Jenkins
OpenShift
Docker
REST APIs
Scikit-learn
Pandas
NumPy
Agile
Data Science
Feature Engineering
Security Clearance

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