Jobs in Milton

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Within 25 km of Milton

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Martyn Bassett Associates

Data Scientist

Mississauga, ON, Canada

Full-time

Within 25 km of Milton · About 21.5 km from the city centre

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Job details

Job type: Full-time
Apply by: Dec 2, 2026
Posted: Nov 2, 2026

Original job description

About the Client:

Our client is a Data Security Platform startup that protects sensitive data before it ever reaches an app, a pipeline, or an AI model.

Their product is used by large enterprises across Finance, Insurance, Telco, and Healthcare to reduce risk, simplify compliance, and make exposed data unusable.

They’re bootstrapped and have crossed the $15M ARR mark this year. The mission now is to enable data security in a world where Agentic AI tools are embedded within enterprise systems and have more access to private data than ever before.

The Opportunity:

You will be the company’s first Data Scientist, reporting directly to the CTO and becoming a founding member of the AI team.
You will build the AI-driven discovery and classification at the core of the product: ML and LLM-based classifiers, embedding similarity, behavioural models, and context-aware sensitivity detection.
You will post train and fine tune open source LLMs to power agents in narrow security domains, taking models to production class precision.
You will own models through the full lifecycle, from synthetic datasets to ensembles at scale, drift, and retraining.

The Skills/Requirement Needed to Succeed:

You have built and shipped models to production across classical ML, deep learning, and LLMs.
You have hands on experience post training and fine tuning LLMs with RL, SFT, and verifiable rewards.
You have built behavioural, classification, or anomaly detection models. Fraud, threat detection, or data security (DSPM, DLP, CASB) experience is a strong plus.
You have built production pipelines and served LLMs at scale.
You are able to commute to an office in Mississauga 1 to 2 days a week. Fully remote will be considered for the right candidate.

Martyn Bassett Associates:

Martyn Bassett Associates is a team of recruiters solving the ambitious goals of startups and scale-ups by recruiting world-class sales, marketing, and product management talent who deliver growth and scale. We’ve helped over 1500 candidates land their next big opportunity at companies like Shopify, Extreme Networks, Wattpad, Loopio, Readdle, ClearCo, Workleap, Invicti, Resolve Pay, The Herjavec Group, GE Energy, GE Health, Enable, RBC Ventures, Unibuddy, Cognota, Thalmic Labs (now Google Glass), Eloqua (now Oracle Marketing Cloud) to name a few.

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More about this job

Responsibilities

Build AI-driven data discovery and classification capabilities, including machine-learning and LLM classifiers, embedding similarity, behavioral models, and context-aware sensitivity detection. Own models throughout their lifecycle, from synthetic data and post-training through production deployment, scaling, drift monitoring, and retraining.

Requirements

Candidates should have shipped production models using classical machine learning, deep learning, and LLMs, and have hands-on experience post-training and fine-tuning LLMs with reinforcement learning, supervised fine-tuning, and verifiable rewards. Experience building behavioral, classification, or anomaly-detection models and production pipelines for serving LLMs at scale is required; fraud, threat detection, or data-security experience is a strong plus.

Skills

Production Machine Learning
Deep Learning
Large Language Models
LLM Post-Training
LLM Fine-Tuning
Reinforcement Learning
Supervised Fine-Tuning
Verifiable Rewards
Behavioral Modeling
Classification
Anomaly Detection
Embedding Similarity
Synthetic Data
Production Pipelines
Model Drift Monitoring
Model Retraining

Visa sponsorship

Not detected in the job text

Keywords

Data Science
Data Security
Data Discovery
Data Classification
Machine Learning
Deep Learning
Large Language Models
LLM Classifiers
Embedding Similarity
Behavioral Models
Sensitivity Detection
LLM Post-Training
LLM Fine-Tuning
Reinforcement Learning
Supervised Fine-Tuning
Verifiable Rewards
Synthetic Datasets
Ensemble Models
Production Pipelines
LLM Serving
Model Drift
Model Retraining
Anomaly Detection
Fraud Detection
Threat Detection
DSPM
DLP
CASB
Agentic AI

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