Senior Full Stack Engineer

TekRek; Toronto; On-site; CAD 140,000 - 160,000; Full time

Job summary

TekRek is seeking a Senior Full Stack Engineer in Toronto to develop scalable tools for a clean-tech startup. This role involves creating powerful applications, collaborating with experts in climate sustainability, and contributing to impactful solutions in the decarbonization of buildings.

Qualifications

• 5+ years of experience in SaaS environments.
• Growth mindset and interest in climate impact.

Responsibilities

• Design and develop tools from backend APIs to front-end interfaces.
• Work closely with product and domain experts for sustainability.

Skills

Node.js

React

Python

MongoDB

Google Cloud Platform

Problem-solving

Education

Bachelor’s degree in Computer Science, Engineering, Mathematics, or related field

Job description

This range is provided by TekRek. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

CA$140,000.00 / yr - CA$160,000.00 / yr

Direct message the job poster from TekRek

Software Dev & Engineering | Technology & Financial Industries | Passionate about Recruitment

Senior Full Stack Engineer (React, Node, Python, GCP, AI / ML, ClimateTech)

Company Background

TekRek is partnering with a high-growth clean-tech startup on a mission to decarbonize the built environment. Adaptis enables organizations to reduce both carbon and cost across the full lifecycle of their buildings through a data-driven platform that empowers smarter decisions from design through operations.

Job Description

As a Senior Full Stack Engineer, you will :

• Design and develop powerful tools across the stack—from backend APIs to intuitive front-end interfaces.
• Shape foundational architecture to support a highly scalable, AI-enabled decarbonization platform.
• Work closely with product, design, and climate domain experts to deliver fast iterations that directly impact sustainability.
• Build and own end-to-end features that make AI-powered carbon reduction more accessible and actionable.
• Contribute best practices and mentor across a tight-knit engineering team focused on speed, impact, and learning.

Job Requirements

• 5+ years of experience building full-stack features in fast-moving SaaS environments.
• Proficiency with Node.js (Express), React (Vite), and MongoDB.
• Experience with backend development in Python (FastAPI).
• Familiarity with Google Cloud Platform and deploying scalable infrastructure.
• Strong problem-solving skills and the ability to work independently in dynamic startup settings.
• Growth mindset, team-first mentality, and genuine interest in climate impact.
• Bachelor’s degree in Computer Science, Engineering, Mathematics, or a related field.

Why Apply?

This is a mission-driven role for builders who want to shape the technical foundation of a platform with real-world climate impact. You’ll work on a cutting-edge stack with modern AI / ML integrations, contribute to product direction, and join a company that’s experimental by nature, deeply collaborative, and committed to professional growth.

If you’re based in Toronto and excited to decarbonize buildings through code, reach out to [emailprotected] to learn more.

Seniority level

Seniority level

Mid-Senior level

Employment type

Employment type

Full-time

Job function

Software Development

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Senior Stack Engineer • Toronto, ON, Canada