Find work in Canada.

598,634 jobs across our Canadian network. How we count

Jobs in Canada

Email me new jobs Save this search

Added 3 months ago
JO
Business Systems Manager
Jetstream of Houston
Innisfil, ON
- Full-time
Strong hands‑on software development experience with JavaScript, Python, Apache Spark, RESTful APIs, or comparable technologies.
Added 3 months ago
D
Forward Deployed Engineering Lead
Doppel
Remote, Canada
- $120,000 to $220,000 CAD / year
- Full-time
- Remote
…of engineering, product, and go-to-market. We work directly with the world's largest enterprises to deploy Doppel, build the integrations that connect us to their security stack, and turn…
Added 3 months ago
P
Senior Analytics Engineer
Passage
Toronto, ON
- Full-time
Passage helps international students navigate their journey abroad - from choosing a program and getting admitted to financing their studies and helping with their visa.
Added 3 months ago
BC
Sr. Software Engineer (AI/ML)
Blackpoint Cyber
Remote, Canada
- $150,000 to $180,000 CAD / year
- Full-time
- Remote
Python required. Familiarity with TypeScript and/or Java.
Added 1 month ago
Software Engineer, Wallet
Robinhood
Toronto, ON
As a Software Developer, you will build and own the backend services, infrastructure, and data systems that support Robinhood Wallet products. You will develop new features and system…
Added 2 months ago
Staff Consultant - Risk Consulting - FRSM - Ai Risk
EY
Toronto, ON · Montreal, QC
At EY, we’re all in to shape your future with confidence.
Added 3 months ago
Digital Architect
Government of Alberta
Edmonton, AB
Experience delivering digital services in agile, product-oriented environments and familiarity with languages such as Python, Java, .NET, or Node.js.
Added 3 months ago
RA
Software Engineer II, Vehicle Data Services
Rivian and Volkswagen Group Technologies
Remote, Canada
- $77,400 to $102,620 CAD / year
- Full-time
- Remote
You will write production Go and Python, work with document databases and columnar analytical stores, build and consume gRPC and REST APIs, and operate services that run continuously…
Added 2 months ago
Data Engineer
Capgemini
Mississauga, ON
Consult with users clients and other technology groups on issues recommend advanced programming solutions and install and assist customer exposure systems
Added 3 months ago
Senior Data Engineer
Talents LGS
Montreal, QC
At IBM Consulting FutureNow, we unite human expertise and artificial intelligence to deliver client results with certainty, speed, and value. Fueled by LGS, with offices in Montreal and…
Added 3 months ago
P
Credit Risk Modelling Senior Associate (Bilingual FR/EN)
PwC
Montreal, QC
- Full-time
A career in our Financial Services Risk and Regulatory (FS R&R) Credit Risk Modelling practice will provide you with the opportunity to help financial institutions rethink their approach to…
Added 2 months ago
PC
Spécialiste DevOps / DevOps Specialist
Portage CyberTech
Gatineau, QC
- Full-time
Langages de script et d’automatisation tels que Python, Bash, PowerShell ou équivalents.
Added 3 months ago
G
Software Engineer, Full Stack
Gigi
Toronto, ON
- Full-time
…interface a media buyer actually touches. Our stack includes Python, FastAPI, LangGraph and LangChain; TypeScript, Vue and Nuxt; Java and Spring Boot; PostgreSQL, pgvector, Redis and NATS;…
Added 3 months ago
QUALITY ASSURANCE AUTOMATION TESTER - HYBRID
Green Shield Canada
Toronto, ON · Windsor, ON
prepaid drug plan, and GreenShield was born as a non-profit with a mission
Added 3 months ago
MH
Senior Full-Stack Automation Engineer - Gravity
MedMe Health
Remote, Canada
- $115,000 to $176,000 CAD / year
- Full-time
- Remote
…schedule, document, and manage clinical services at scale. With over 4,500 pharmacies using our software, we’ve facilitated more than 25 million patient services, transforming pharmacies…
Added 3 months ago
L
Principal Digital (mixed-signal) Architect
Lightmatter
Toronto, Ontario
- Full-time
Lightmatter is (re)inventing the future of computing with light!
Added 3 months ago
FH
Senior Software Engineer - Fullstack
Function Health
Canada
- Full-time
Experience with Python, GCP & FastAPI a plus for future initiatives.
Added 3 months ago
R
Python Automation Developer, Network Security
RAVL
Toronto, Ontario
- Full-time
We're looking for a Senior Full Stack Developer to join our team on a short-term contract engagement. In this role, you'll build automation solutions that improve operational efficiency,…
Added 4 months ago
KC
Manager, GRC
KPMG Canada
Toronto, Ontario
- Full-time
…develop skills for the future, and take ownership of your career with support at every stage. Join a firm where your career can make a…
Added 3 months ago
CF
Director, Business Analytics and Insights
CI Financial
Toronto, ON
- Full-time
Proficiency in data visualization tools (e.g., Tableau, Power BI), statistical software (e.g., Python), and CRM platforms (e.g., Salesforce); with a strong working knowledge and…
Added 3 months ago
F
Data Engineer
Financeit
Remote, Canada
- Full-time
- Remote
Do you love working with multi-disciplinary teams and stakeholders across a wide range of functions to implement and solve data engineering challenges? Are you equally skilled at delivering…
Added 3 months ago
C/
BA and QA Tester (12 month contract)
CIRO / OCRI
Toronto, ON
- Full-time
Basic programming knowledge with familiarity in Python
Added 3 months ago
CI
Manager, Delivery Data Science
Curinos Inc
Toronto, ON
- Full-time
…business strategy and technical execution - partnering closely with Data Science, Product, and Client Success teams to develop optimization strategies, support model governance, and drive…
Added 2 months ago
Senior Full-Stack Developer (Python/React) - Onboarding Team
AlayaCare
Montreal, QC
Extensive development experience with Python and unit testing using PyTest.
Added 2 months ago
Machine Learning Engineer, Safety and Customer Care AI
Lyft
Toronto, ON
Strong programming skills in Python and hands-on experience with PyTorch.

Lyft

Machine Learning Engineer, Safety and Customer Care AI

Toronto, ON, Canada

Apply About employer

Applications open in a new tab.

Job details

Experience: 3+ years of industry experience in applied ML/AI, inclusive of an MS or PhD in Computer Science, Machine Learning, Artificial Intelligence or a related technical field.
Posting language: English
Posted: Sep 4, 2026

Original job description

At Lyft, our purpose is to serve and connect. We aim to achieve this by cultivating a work environment where all team members belong and have the opportunity to thrive.

The Safety and Customer Care (SCC) team at Lyft manages over 1.7 million monthly human and AI interactions and serves as Lyft's primary direct touchpoint with riders and drivers. We handle critical infrastructure that powers both human associates and AI agents to make riders and drivers feel safe and comfortable while riding or driving with Lyft, transforming every support interaction into a moment of genuine connection.

Agentic AI is at the center of how we scale that mission. We fine-tune and align open-source models, build AI-powered support agents, and develop end-to-end AI agents for safety case management, systems that reason over complex, high-stakes cases and drive them to resolution. SCC brings together ML, data, backend, and product engineers alongside data scientists and operations partners to transform these systems.

As a Machine Learning Engineer on the SCC team, you will fine-tune and align models and build AI Agents that power how riders and drivers get help. Your work spans the full loop: post-training open-source models for our domain, composing them into multi-step agents, and building the evaluation that proves they are safe to ship in a customer-facing, safety-critical setting.

Post-train and adapt open-source LLMs for SCC use cases using SFT, LoRA, and preference-tuning methods (RLHF, RLAIF, RLVR).
Design and build AI-powered support agents and end-to-end agents for safety case management using LangGraph or equivalent agentic frameworks.
Own the evaluation data flywheel, offline and online, that defines what "good" looks like and build benchmarks for the team to hill-climb.
Turn interaction feedback into training data and learning signals, closing the data flywheel that continuously improves the models.

Responsibilities:

Conduct literature review and build post-training framework and lifecycle. Curate and process human and synthetic data for SFT/LoRA/RLHF/RLAIF/RLVR, and iterate on model quality for real support and safety tasks.
Develop, evaluate, and productionize AI agents, designing tools, state, and control flow in LangGraph (or equivalent) and taking them through the full agent development lifecycle.
Build and scale evaluation frameworks, golden sets, rubric-based grading, LLM-as-judge where appropriate, and regression testing.
Ship models and agents into real-time production, with the monitoring and guardrails needed to operate them safely at millions of interactions a month.
Apply traditional ML (classification, ranking, gradient-boosted trees) where it's the right tool, and partner with product, ops, and data science to scope problems and define success metrics.

Experience:

3+ years of industry experience in applied ML/AI, inclusive of an MS or PhD in Computer Science, Machine Learning, Artificial Intelligence or a related technical field.
Post-training experience with open-source models. Hands-on familiarity with fine-tuning and preference-tuning paradigms such as SFT, LoRA, RLHF, RLAIF, and RLVR.
Agentic development experience. Built and shipped agents with LangGraph or equivalent frameworks, and comfort with the full agent development lifecycle.
Experience with AI/LLM evaluation. Designed metrics and built offline/online evaluation for generative systems.
Experience deploying ML/AI applications to real-time production use cases.
Strong programming skills in Python and hands-on experience with PyTorch.
Preferred:
- Experience applying ML/AI to customer support or trust & safety workflows - agent assist, routing, resolution recommendation, or abuse/safety detection.
- PhD in Computer Science, Machine Learning, Statistics, or a related technical field.
- Publications at top-tier peer-reviewed research venues (e.g., NeurIPS, ICML, ICLR, ACL, CVPR).

Benefits:

Extended health and dental coverage options, along with life insurance and disability benefits
Mental health benefits
Family building benefits
Child care and pet benefits
Access to a Lyft funded Health Care Savings Account
RRSP plan with company match to help save for your future
In addition to provincial observed holidays, salaried team members are covered under Lyft's flexible paid time off policy. The policy allows team members to take off as much time as they need (with manager approval). Hourly team members get 15 days paid time off, with an additional day for each year of service
Lyft is proud to support new parents with 18 weeks of paid time off, designed as a top-up plan to complement provincial programs. Biological, adoptive, and foster parents are all eligible.
Subsidized commuter benefits and Lyft ride credits

Lyft is committed to creating an inclusive workforce that fosters belonging. Lyft believes that every person has a right to equal employment opportunities without discrimination because of race, ancestry, place of origin, colour, ethnic origin, citizenship, creed, sex, sexual orientation, gender identity, gender expression, age, marital status, family status, disability, pardoned record of offences, or any other basis protected by applicable law or by Company policy. Lyft also strives for a healthy and safe workplace and strictly prohibits harassment of any kind. Accommodation for persons with disabilities will be provided upon request in accordance with applicable law during the application and hiring process. Please contact your recruiter if you wish to make such a request.

Lyft highly values having employees working in-office to foster a collaborative work environment and company culture. This role will be in-office on a hybrid schedule - Team Members will be expected to work in the office at least 3 days per week, including on Mondays, Wednesdays, and Thursdays. Lyft considers working in the office at least 3 days per week to be an essential function of this hybrid role. Your recruiter can share more information about the various in-office perks Lyft offers. Additionally, hybrid roles have the flexibility to work from anywhere for up to 4 weeks per year. #Hybrid

The expected base pay range for this position in the Toronto area is CAD $118,800 - CAD $148,500, not inclusive of potential equity offering, bonus or benefits. Salary ranges are dependent on a variety of factors, including qualifications, experience and geographic location. Your recruiter can share more information about the salary range specific to your working location and other factors during the hiring process.

Lyft may use artificial intelligence to screen applicants, however, Lyft employees make the ultimate selection and hiring decisions.

This job fills an existing vacancy.

Apply About employer

More about this job

Responsibilities

The ML Software Engineer will post-train and align open-source LLMs and build agentic AI systems to support safety and customer care workflows. They will also own the evaluation data flywheel and productionize models with necessary guardrails for high-stakes interactions.

Requirements

Candidates must have 3+ years of industry experience in applied ML/AI, including hands-on experience with fine-tuning, preference-tuning, and agentic development. A degree in Computer Science or a related technical field is required, with a preference for advanced degrees and research publications.

Skills

Machine Learning
Python
PyTorch
LLM
Agentic AI
Fine-tuning
RLHF
LoRA
LangGraph
Evaluation frameworks
Data flywheel
Safety case management
Model alignment
Synthetic data
Regression testing
Gradient-boosted trees

Benefits

Extended health and dental coverage
Life insurance
Disability benefits
Mental health benefits
Family building benefits
Child care benefits
Pet benefits
Health Care Savings Account
RRSP plan with company match
Flexible paid time off
Paid parental leave
Subsidized commuter benefits
Lyft ride credits

Visa sponsorship

Not detected in the job text

Keywords

Machine Learning
Artificial Intelligence
LLM
Python
PyTorch
SFT
LoRA
RLHF
RLAIF
RLVR
LangGraph
Agentic AI
Data Flywheel
Safety Case Management
Evaluation Frameworks
Gradient-boosted Trees
Classification
Ranking
Productionization
Model Alignment
Synthetic Data
Regression Testing
Trust & Safety
Customer Support
Software Engineering

Report this job