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Added 2 months ago
Senior Agentic Software Engineer
Lantern
Edmonton, AB
As a Senior Software Modernization Engineer, you'll work directly with enterprise software engineering organizations to help modernize applications, improve developer productivity,…
Added 3 months ago
S&
Senior Substation Electrical Engineer 1 - Grid
Sargent & Lundy
Toronto, ON · North York, ON
- Full-time
This position offers you the opportunity to work in a project team environment with other engineers and designers involved in the detailed electrical design and project management of high…
Added 3 months ago
S&
Lead Substation Engineer 1 - Grid
Sargent & Lundy
Toronto, ON · North York, ON
- Full-time
Guide junior and senior-level engineers and designers in protection and controls engineering design efforts, including providing guidance with the coordination of detailed design phases for…
Added 3 months ago
S
Senior Software Engineer, Notebooks
Snowflake
Toronto, ON
- $245,250 to $295,250 CAD / year
- Full-time
…who thrive in dynamic and fast-moving environments and move with an experimental mindset - who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results.…
Added 3 months ago
I
Senior Data Engineer
iQmetrix
Winnipeg, MB
- Full-time
The ideal candidate is a hands-on engineer with strong production experience in Python, SQL, and distributed compute environments. They should have deep familiarity with modern lakehouse…
Added 3 months ago
I
Senior Data Engineer
iQmetrix
Regina, SK
- Full-time
The ideal candidate is a hands-on engineer with strong production experience in Python, SQL, and distributed compute environments. They should have deep familiarity with modern lakehouse…
Added 3 months ago
I
Senior Data Engineer
iQmetrix
Toronto, ON
- Full-time
The ideal candidate is a hands-on engineer with strong production experience in Python, SQL, and distributed compute environments. They should have deep familiarity with modern lakehouse…
Added 3 months ago
I
Senior Data Engineer
iQmetrix
Vancouver, BC
- $110,000 CAD / year
- Full-time
The ideal candidate is a hands-on engineer with strong production experience in Python, SQL, and distributed compute environments. They should have deep familiarity with modern lakehouse…
Added 26 days ago
Senior Data Platform Engineer
Tubi - Canada
Toronto, ON
The team is small and senior. Each engineer owns major platform components: you design it, build it, and support it in production.
Added 2 months ago
TR
AI Engineering Lead, Product Analytics
Thomson Reuters
Remote, Canada
- Full-time
- Remote
This role suits someone who builds and who has run programs that scale across a team. You are a strong engineer who works alongside other builders, shaping infrastructure with them so they…
Added 3 months ago
SD
Senior AI Engineer
Symbiotic Digital
Unorganized North Algoma, Ontario · Downtown Toronto (Ryerson), Ontario
- Contract
We are seeking a Senior AI Engineer to design, develop, and
Added 2 months ago
ST
Senior Data Engineer
Sensor Tower
Remote, Canada
- Full-time
- Remote
As Sensor Tower continues to grow as a global company, we are looking for a Senior Data Engineer to build amazing products together. We have a wonderful team of more than a hundred…
Added 3 months ago
A
Staff Software Engineer, Shared Services ⭐
Achievers
Toronto, ON
- Full-time
8+ years of relevant back-end software development experience leading projects and especially system design, with at least 3 of them in a Senior/Staff capacity.
Added 29 days ago
Senior ML Data Processing Developer
LawZero
Montreal, QC
We are seeking a Senior ML Data Processing Developer to participate in the development, curation, and scaling of our core data asset pipeline. Sitting at the intersection of data…
Added 1 month ago
Senior Software Engineer II, Full-Stack
Braze
Toronto, ON
We are looking for a Senior Software Engineer II to join our Cloud Data Ingestion & Transformation (CDIT) team. This team is vital to Braze's growth, owning multiple systems that enable…
Added 4 months ago
KC
Forward Deployed AI Engineer
Keyrus Canada
Toronto, ON · Montreal, QC
- Full-time
We are currently building our talent pipeline for upcoming Forward Deployed AI Engineer opportunities in Canada. While we may not have an immediate opening today, we are actively connecting…
Added 1 month ago
Senior Software Enginner- Global Payments Engineering
Scotiabank
Toronto, ON · Scarborough, ON
Familiar with languages, frameworks, and databases (such as Java/Spring, Node.js/Express.js, Python, MySQL, PostgreSQL, MongoDB, DB2)
Added 3 months ago
M
Senior Site Reliability Engineer
Morningstar
Toronto, Ontario
- Full-time
Collaborate with software engineers and data engineers to embed SRE best practices into the development lifecycle, including SLOs, error budgets, and capacity planning.
Added 1 month ago
Q
Senior Director, Technology
Qualcomm
Ottawa, ON
- Full-time
…create a smarter, connected future for all. As a Qualcomm ASIC Engineer, you will define, model, design (digital and/or analog), optimize, verify, validate, implement, and document IP…
Added 3 months ago
KC
Senior Satellite Systems Designer - Platform Architect
Kepler Communications
Toronto, ON
- Full-time
As a Senior Systems Engineer, you will be a technical leader contributing across multiple satellite and space-system programs. You will help deliver critical subsystems, system-level work…
Added 3 months ago
KC
Satellite Systems Designer - Analysis & Support
Kepler Communications
Toronto, ON
- Full-time
As a Systems Engineer, you will support satellite and payload development programs by contributing to mission analysis, system-level engineering, payload integration, verification planning,…
Added 3 months ago
CS
Inference ML API SDET
Cerebras Systems
Toronto, Ontario
- Full-time
As a Senior Software Engineer in Test for the ML API features team, you will lead testing strategy and execution for AI/ML models, evaluating accuracy, fairness, and performance at scale.…
Added 1 month ago
Q
Connectivity Systems Engineer, Staff
Qualcomm
Toronto, ON
- Full-time
As a connectivity systems engineer, you'll define and develop the technologies that underlie the next generation of our products. The ideal candidate will have extensive hands-on experience…
Added 3 months ago
P
Senior AI Engineer
Paytm
Toronto, Ontario
- Full-time
…millions of live transactions. Closing it is the job. You’ll embed with the teams and customers who depend on AI - risk, fraud, collections, payments, support, developer experience - and…
Added 3 months ago
Q
Senior Full Stack Engineer
Quandri
Vancouver, British Columbia
- Full-time
As a Full Stack Engineer at Quandri, you will be directly responsible as an IC leader of a team that builds our revenue-generating customer-facing product offerings on our intelligence…

LawZero

Senior ML Data Processing Developer

Montreal, QC, Canada

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Job details

Posting language: English
Posted: Sep 9, 2026

Original job description

We are seeking a Senior ML Data Processing Developer to participate in the development, curation, and scaling of our core data asset pipeline. Sitting at the intersection of data engineering, data curation, and machine learning, you will own the end-to-end pipeline that transforms raw web-scale data into high-signal datasets used to train the Scientist AI.

In this role, you will not just manage data; you will engineer its quality. You will design algorithmic filtering, build model-based scoring mechanics, and ensure rigorous benchmark integrity to power the next generation of AI. And as our models push beyond established paradigms, you will design and implement novel data transformations that don't yet have playbooks, working at the frontier of what training data can be.

We are hiring multiple people for this role, and responsibilities may be distributed across the team based on individual experience, skills, and interests.

Key Responsibilities

Partner with the Research team to define, build, automate, scale, and manage data pipelines that transform raw web-scale data into training datasets for the Scientist AI.
Build and maintain data processing pipelines, including deduplication, model-based quality scoring, heuristic filtering, toxicity removal, PII scrubbing, metadata extraction, and proprietary data transformations, with full dataset versioning and provenance tracking, optimizing for throughput and cost at scale.
Ensure all ingested data meets compliance requirements, internal Data Governance policies, and legal obligations.
Develop and refine the scoring and filtering toolchain: heuristics, LLM-as-a-judge evaluators, ML classifiers, metadata extraction modules, and human-in-the-loop review workflows required for data processing and quality assurance.
Instrument data processing pipelines with data-quality monitoring, guardrails, and alerting to catch regressions before they propagate downstream.
Collaborate with the Research team and other teams to understand evolving data requirements, then identify and acquire large-scale text corpora that meet those requirements. This includes conducting systematic coverage analyses to identify gaps in the corpus and develop targeted acquisition strategies to address them, and working with the Legal & Governance Team to license new data sources.
Design and maintain strict leakage detection mechanisms to guard against evaluation contamination across all stages of the data processing pipeline.
Build internal tooling and interfaces that let researchers explore, query, and understand available datasets with minimal friction.

Skills and Qualifications

Degree in computer science, software engineering, or a related field.
Proven track record of handling massive unstructured text datasets (trillion-token scale), with 5+ years of experience in data processing, machine learning engineering or Natural Language Processing (NLP).
Hands-on experience with distributed processing frameworks (e.g., Spark, Ray, Flink), designing and optimizing high-throughput pipelines.
Experience with data privacy implementation (PII scrubbing), content-safety filtering (toxicity, bias), and evaluation-contamination prevention.
Demonstrated ability to work across Research, Engineering, and/or Legal/Governance teams, translating varied requirements into concrete pipeline work.
Strong Python proficiency, including experience writing production-grade data-processing code.
Experience with pipeline orchestration frameworks (e.g., Airflow, Prefect, Dagster).

Nice to have

Experience training, fine-tuning, or deploying ML models for data-quality tasks (classifiers, LLM-based evaluators) and familiarity with LLM inference optimization (e.g. vLLM, SGLang).
Familiarity with containerized deployment (Docker, Kubernetes) and infrastructure-as-code practices.
Familiarity with ML experiment tracking tools (e.g. Weights and Biases).
Experience with data licensing workflows or web-scale data acquisition.
Contributions to open-source data processing or NLP tooling.

What we offer

The chance to contribute meaningfully to a globally critical initiative
Comprehensive health benefits (including mental health and wellness management account)
20 days of vacation per year upon start
Employer contribution of 4% to your retirement savings, with no required employee match
Additional compensation totaling 8% of your salary to apply towards additional retirement savings or bonuses (independent of group and individual performance)
A team of passionate world-class experts in their field
A collaborative and inclusive work environment in our vibrant office space in the heart of Little Italy, in the trendy Mile-Ex district, close to public transportation

About LawZero

LawZero is a non-profit organization committed to advancing research and creating technical solutions that enable safe-by-design AI systems. Its scientific direction is based on new research and methods proposed by Professor Yoshua Bengio, the most cited AI researcher in the world. Based in Montreal, LawZero’s research aims to build non-agentic AI that learns primarily to understand the world rather than to act in it, giving truthful answers to questions based on transparent and externalized probabilistic reasoning. Such AI systems could be used to accelerate scientific discovery, to provide oversight for agentic AI systems, and to advance the understanding of AI risks and how to avoid them. LawZero believes that AI should be cultivated as a global public good - developed and used safely towards human flourishing. For more information, visit www.lawzero.org

You belong here

At LawZero, diversity is important to us. We value a work environment that is fair, open and respectful of differences. We welcome applications from highly qualified individuals interested in working towards our mission in a respectful, inclusive and collaborative setting.

Your personal information will be collected and processed by LawZero to evaluate your application for employment in compliance with our Privacy Policy. Under privacy laws in force in your country of residence, you may have several privacy rights, such as to request access to your personal information or to request that your personal information be rectified or erased. Details on how you can exercise your rights can be found in our Privacy Policy.

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More about this job

Responsibilities

Develop and scale end-to-end data pipelines to transform raw web-scale data into high-quality datasets for training the Scientist AI. This includes implementing algorithmic filtering, quality scoring, and ensuring rigorous benchmark integrity and data provenance.

Requirements

Requires a degree in computer science or a related field and 5+ years of experience in data processing or NLP with massive unstructured datasets. Proficiency in Python and distributed processing frameworks like Spark or Ray is essential.

Skills

Python
Spark
Ray
Flink
Airflow
Prefect
Dagster
Natural Language Processing
Distributed Processing
Data Pipeline Engineering
ML Engineering
PII Scrubbing
Data Governance
Docker
Kubernetes
LLM Evaluation

Benefits

Comprehensive Health Benefits
Mental Health And Wellness Management Account
20 Days Of Vacation Per Year
Additional Compensation Of 8% For Retirement Savings Or Bonuses

Visa sponsorship

Not detected in the job text

Keywords

Machine Learning
NLP
Data Engineering
LLM
vLLM
SGLang
Weights And Biases
Data Curation
Toxicity Removal
PII Scrubbing
Data Leakage Detection
Distributed Computing
Web-Scale Data
Data Versioning
Provenance Tracking
Heuristic Filtering
ML Classifiers
Containerization
Infrastructure-as-Code
Data Licensing

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