Jobs in Ontario

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Added 12 mins ago
DY
Dental laboratory assistant
dentalstudios YORKVILLE.BURLINGTON
Burlington, ON
- $19 to $24 CAD / hour
- Full-time
- On-site
Added 12 mins ago
MR
Marble tilesetter
MHA RENOVATIONS
North York, ON
- From $37 CAD / hour
- Full-time
- On-site
Added 12 mins ago
SG
Greenhouse labourer
Suntech Greenhouse
Manotick, ON
- From $19.76 CAD / hour
- Full-time
- On-site
Added 13 mins ago
OC
Store manager - retail
Om Canpacific International Inc.
Etobicoke, ON
- From $43.27 CAD / hour
- Full-time
- On-site
Added 13 mins ago
JB
Cook
Jose's Bar and Grill
Leamington, ON
- $23 to $30 CAD / hour
- Full-time
- On-site
Added 14 mins ago
MB
Territory Manager - Sudbury
Moosehead Breweries
Sudbury, ON
- $60,000 to $72,000 CAD / year
- Full-time
Added 14 mins ago
MM
Underground Development Miners
Magna Mining Inc.
Sudbury, ON
- Full-time
Added 14 mins ago
DM
Millwright (Red Seal)
DMC Mining Services
Sudbury, ON
- Full-time
Added 14 mins ago
TC
Learning & Development Manager
Takeda Canada Inc.
Toronto, ON
- Full-time
Added 14 mins ago
DM
Welder
DMC Mining Services
Sudbury, ON
- Full-time
Added 14 mins ago
DM
Shaft Miner
DMC Mining Services
Sudbury, ON
- Full-time
Added 14 mins ago
TC
Insights & Analytics Manager
Takeda Canada Inc.
Toronto, ON
- Full-time
Added 14 mins ago
CA
AV Installer Technician - Entry Level
CAMEL AudioVisual
Toronto, ON
- Full-time
Added 14 mins ago
BB
Bilingual Account Executive and Inside Sales
Beyond Bilingual Inc.
Brampton, ON
- Full-time
Added 14 mins ago
CC
Catering service manager
Cleese Catering
Toronto, ON
- Full-time
Added 14 mins ago
Forklift Driver
eCycle Solutions Inc.
Brampton, ON
Added 14 mins ago
TH
Laboratory Technician - Full Time -CVH Labs Spec Proc
Trillium Health Partners
ON
- Full-time
Added 14 mins ago
TH
Laboratory Technologist - Temp Full Time- M Transfusion Medicine
Trillium Health Partners
ON
- Full-time
Added 14 mins ago
ST
Busy Tire Shop - Passenger Light Truck (PLT) Tire Installer
Scotia Tirecraft
Mississauga, ON
- Full-time
Added 14 mins ago
ST
Inside Sales Representative (PLT)
Scotia Tirecraft
Mississauga, ON
- Full-time
Added 14 mins ago
BS
Service advisor - auto repair
BMW Sarnia
Sarnia, ON
- $19 to $24 CAD / hour
- Full-time
- On-site
Added 16 mins ago
NC
Fleet coordinator
N.K.P Courier Company Inc.
Brampton, ON · Cambridge, ON
- From $37.3 CAD / hour
- Full-time
- On-site
Added 16 mins ago
BS
Personal support worker - home support
Bhajan Singh Thind
Mississauga, ON
- From $21 CAD / hour
- Full-time
- On-site
Added 19 mins ago
CC
Carpenter
C.S. Constructors Inc
Etobicoke, ON
- $36 to $37 CAD / hour
- Full-time
- On-site
Added 20 mins ago
NY
Driver, truck
NEW YORK LOGISTICS LTD
Brampton, ON
- From $37 CAD / hour
- Full-time
- On-site

Arkion-tech

Software Intern

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Internship

Apply About employer

Applications open in a new tab.

Job details

Job type: Internship
Apply by: Nov 27, 2026
Posting language: English
Posted: Oct 28, 2026

Original job description

About The Role

We are looking for a Software Intern to help us adapt open-weight large language models to security and identity work. You will take a model from raw data to a measured result: preparing datasets, running fine-tuning jobs, and building the evaluations that tell us whether a change helped.

This is a Fall/Winter internship: hands-on work with real models and real GPUs, alongside the founding team. If you have already fine-tuned a model and want to do it on problems that matter, this is the role for you.

Responsibilities

What you’ll own.

Data & training

Collect, clean, and prepare training and evaluation datasets.
Fine-tune open-weight LLMs with SFT and parameter-efficient methods (LoRA / QLoRA).
Run and monitor training jobs on GPUs, and make the most of limited compute.

Evaluation

Build evaluation sets and benchmarks that reflect the tasks we care about.
Compare models and training runs, and report clearly what worked and what did not.

Required Skills

What you’ll bring day one.

Core

PyTorch and the Hugging Face ecosystem (Transformers, Datasets, PEFT).
Hands-on experience with open-weight LLMs.
Fine-tuning: SFT, LoRA / QLoRA.
Dataset preparation for training and evaluation.
Model evaluation.
GPU fundamentals: memory, batch sizes, mixed precision.

Nice to Have

Domain-adaptive or continued pretraining (DAPT).
Synthetic data generation.
CUDA.
Docker.
vLLM for serving and fast inference.
Experiment tracking (Weights & Biases, MLflow or similar).
Evaluation frameworks and harnesses.
Reinforcement learning for LLMs.

Why Join Us

01

Train and evaluate real models, not a sandbox project.

02

Work directly with the founding team.

03

Learn how AI meets security and cryptographic identity.

Apply About employer

More about this job

Responsibilities

Prepare training and evaluation datasets, fine-tune open-weight LLMs using supervised and parameter-efficient methods, and run and monitor GPU training jobs. Build benchmarks, compare models and training runs, and clearly report evaluation results.

Requirements

Candidates should have hands-on experience with open-weight LLMs, PyTorch, the Hugging Face ecosystem, fine-tuning methods such as SFT and LoRA/QLoRA, and dataset preparation and model evaluation. They should understand GPU fundamentals, including memory, batch sizes, and mixed precision; experience with domain-adaptive pretraining, synthetic data, CUDA, Docker, vLLM, experiment tracking, evaluation frameworks, or LLM reinforcement learning is a plus.

Skills

PyTorch
Hugging Face Transformers
Hugging Face Datasets
PEFT
Open-Weight LLMs
Supervised Fine-Tuning
LoRA
QLoRA
Dataset Preparation
Model Evaluation
GPU Computing
Mixed Precision
Domain-Adaptive Pretraining
Synthetic Data Generation
CUDA
Docker

Visa sponsorship

Not detected in the job text

Keywords

PyTorch
Hugging Face
Transformers
Datasets
PEFT
Open-Weight Large Language Models
Supervised Fine-Tuning
LoRA
QLoRA
Training Datasets
Evaluation Datasets
GPU Training
Model Evaluation
Benchmarks
GPU Memory
Batch Sizes
Mixed Precision
Domain-Adaptive Pretraining
Continued Pretraining
Synthetic Data Generation
CUDA
Docker
vLLM
Fast Inference
Weights & Biases
MLflow
Evaluation Frameworks
Reinforcement Learning for LLMs
Security
Cryptographic Identity

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