STACK is a leading provider of cloud-based construction estimating and takeoff software solutions, committed to helping businesses transform through innovative solutions. We pride ourselves on fostering a collaborative, dynamic environment where team members have the opportunity to grow and make a real impact. We are hiring a Senior Computer Vision Engineer to improve our computer vision system for construction documents.

This role focuses on detection and segmentation quality, geometric accuracy, and production-grade pipelines that work reliably with messy real-world PDFs and drawings. Design, build, and improve end-to-end detection and segmentation pipelines for document images. Improve document ingestion for PDFs and other unstructured files, including parsing, rendering, and handling of multi-page and multi-view content.

Increase model accuracy, boundary and geometric quality, and overall reliability of predictions for downstream use. Define evaluation metrics, investigate failure cases, and drive continuous quality improvements. Own training infrastructure, dataset curation, annotation quality, and continuous-improvement loops.

Make architectural decisions and own system quality end to end. 5+ years experience building computer vision systems: detection, segmentation, or structured geometry extraction, used high volume in production. ~ Experience working with messy, real-world image data or large unstructured visual datasets. ~ Strong understanding of detection and segmentation tradeoffs, including model architecture choices, training data design, and post-processing. ~ Ability to measure system performance with evaluation, testing, and production metrics. ~ Experience with multimodal models (vision-language models, document AI systems)



~ Understanding of grounding — linking model outputs to source data or coordinates ~ Backend engineering experience, including APIs, async processing, and scalable GPU services.

Experience with polygon or mask post-processing, geometric regularization, or CAD-style structured output.

Background in document-heavy CV domains such as construction, real estate, medical imaging, geospatial, or similar workflows. Familiarity with open-source detection / segmentation ecosystems, training infrastructure, or model serving. Accurate, geometrically correct predictions suitable for downstream measurement, and analysis use.

Clear quality metrics and a repeatable improvement loop. Not a model-training-only role. You'll own data, training, post-processing, and serving. Opportunity to work in a quick-paced, growth-oriented, remote-first environment.

At STACK, our values shape how we work, collaborate, and serve our customers: Give and receive feedback with care.

Customer Obsession: Put the customer at the center of every decision. Solve real problems, follow through, and measure success by customer outcomes. Share knowledge, collaborate across teams, and invest in one another’s development.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We are committed to building a team that represents a variety of backgrounds, perspectives, and skills.

We take into account an individual’s qualifications, skillset, and experience in determining final salary. This role is eligible for health insurance (medical, dental & vision), life insurance, 401(k) & paid time off. The expected compensation range for this position is about $250k-280k CAD.

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📌 Senior Computer Vision Engineer- Canada (Toronto)
🏢 STACK Construction Technologies
📍 Toronto