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Added 3 months ago
M
Full Stack Engineer
myStoria
Remote, Canada
- $100,000 to $140,000 CAD / year
- Full-time
- Remote
We are looking for a product-minded engineer who is strongest on frontend/mobile, but comfortable working across the stack when needed. You’ll own core user-facing flows in our new…
Added 3 months ago
T
Staff Software Engineer, Growth
Tubi
Toronto, Ontario
- Full-time
As a Staff Engineer (L5) on this team, you act as the technical leader for one or more Growth areas. You own the technical architecture and direction, solve ambiguous problems that few…
Added 3 months ago
PI
Senior Database Engineer
PENN Interactive
Canada
- Full-time
We are looking for a Senior Database Engineer to join our thriving Engineering team, to work cross-functionally across engineering, focusing on the architecture for optimal platform…
Added 1 month ago
TC
Machine Learning Engineer - Express Scripts Canada
The Cigna Group
Mississauga, ON
- Full-time
- Other
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…
Added 2 months ago
CH
Machine Learning Engineer - Express Scripts Canada
Cigna Healthcare
Mississauga, ON
- Full-time
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…
Added 1 month ago
Senior Software Engineer (Senior AI Engineer)
Scotiabank
Toronto, ON
Added 2 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
Software Development Engineer, Amazon Customer Service
Amazon
Toronto, ON
…customers worldwide, and we're seeking a Software Development Engineer to help build the next generation of intelligent solutions. In this role, you'll design and implement agentic systems…
Added 2 months ago
X
Senior Engineer
Xero
Vancouver, BC
- Full-time
This is a hands-on Senior Engineer role in Xero’s Reporting team, helping build and improve one of the most-used parts of our product.
Added 1 month ago
X
Digital Sales Engineer / Market Development Manager
Xylem
Fredericton, NB · Sudbury, ON · Mississauga, ON · Pointe-Claire, QC · Mount Pearl, NL · Dartmouth, NS
- Full-time
We're Hiring a Digital Sales Engineer / Market Development Manager!
Added 2 months ago
S
Senior Full-Stack Engineer (Media Team)
Solink
Remote, Canada
- $115,837 to $173,755 CAD / year
- Full-time
- Remote
As a Senior Full-Stack Engineer on the Media Team, you will be responsible for the cloud services that power Solink's media pipeline: ingesting, processing, storing, and serving media data…
Added 1 month ago
F
Staff Software Engineer - Code Authoring
Forerunner
Kitchener, ON
- Full-time
Own the developer workflow end to end: how an engineer or an agent gets from a ticket to a merged, tested change. Know where it is slow or fragile, and change the tooling to fix it.
Added 3 months ago
SS
Software Quality Engineer, AVP
State Street
Toronto, ON
- Full-time
We are seeking a highly motivated QA Engineer who takes end-to-end ownership of quality - from early requirement validation through testing, defect resolution, and final delivery. This role…
Added 4 months ago
LA
AI Engineer
LGS, an IBM Company
Montreal, Quebec
- Full-time
Join our teamJoin our team as an AI Engineer.
Added 3 months ago
B
Senior Data Engineer
BrainStation
Toronto, Ontario
- $120,000 to $145,000 USD / year
- Full-time
As a Senior Data Engineer you’ll be tasked with designing, building, and maintaining scalable data platforms and pipelines. Your deep knowledge of data platforms such as Azure Fabric,…
Added 3 months ago
HM
Data Engineer
Hotspex Media
Toronto, Ontario
- $85,000 to $115,000 CAD / year
- Full-time
Connect data across BigQuery, Postgres, and Airtable; expose clean datasets to AI, Workflow, Analytics consumers
Added 6 months ago
A
Silicon validation engineer
ALTEN
Ottawa, Ontario
- Full-time
Added 3 months ago
S
Full Stack AI Engineer
Scispot
Remote, Canada
- $80,000 to $120,000 USD / year
- Full-time
- Remote
Added 3 months ago
A
Senior Software Engineer, Full-stack (Distribution Center)
Afresh
Ontario
- $137,000 to $205,000 CAD / year
- Full-time
As a Senior Software Engineer on the Distribution Center (DC) Solutions team, you will be responsible for building out our suite of products to reduce food waste and maximize freshness in…
Added 3 months ago
B
Manager, Data Engineer
Brookfield
Toronto, Ontario
- Full-time
We are looking for a motivated Manager, Data Engineer, to ensure the delivery of innovative data solutions that align seamlessly with our business objectives. In this pivotal role, you will…
Added 4 months ago
J
Lead Marketing Data & Analytics Engineer
Jetson
North Vancouver, British Columbia
- Full-time
Being the analytics partner to the GTM team. The marketing, performance, and exec teams will bring you real questions all the time - whether a campaign worked, why one market is lagging…
Added 3 months ago
PI
Data Platform Engineer
Princeton IT Services, Inc
Toronto, Ontario
- Contract
The primary focus of this role will be to design, build, and maintain the EMFI Data Application Platform, a financial analytics application. The incumbent will work across the full stack to…
Added 3 months ago
P
Senior Site Reliability Engineer, AI Infrastructure
PointClickCare
Mississauga, Ontario
- $139,000 to $155,000 CAD / year
- Full-time
Added 4 months ago
CS
C++ Software Engineer
Citadel Securities
Toronto, Ontario · Greater Toronto Area, Canada
- Full-time
…minds in finance, science and technology use powerful, advanced analytics to solve the market’s most critical challenges, turning big ideas into real-world…
Added 3 months ago
TN
Senior Database Engineer
The Nationwide Group
Markham, Ontario
- $140,000 to $165,000 CAD / year
- Full-time
We are seeking a highly experienced Senior Database Engineer to design, manage, optimize, and secure enterprise-level data platforms. This role blends hands-on database administration with…

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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