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Senior Front-End Developer

Job in Montreal, Montréal, Province de Québec, Canada
Listing for: humanfirst.ai
Full Time position
Listed on 2026-02-23
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer, Front End Developer, React.js
Job Description & How to Apply Below
Location: Montreal

Human First is a leader in providing data-centric tools for natural language, used by many of the largest companies across the world. Using cutting-edge technology, Human First helps teams in their AI transformation journeys by empowering them in the curation, management, and continuous improvement of AI instructions. Our platform accelerates any application where building quality instructions are critical, no matter what underlying technology the agents, workflows, or apps are built on.
We’re looking for a full-time senior front-end engineer with a strong  inclination for UI, UX & accessibility . This role is primarily focused on the prototyping and integration of features within our React Typescript application where application performance is paramount. You will also take part in improving the front-end developer experience.
Responsibilities   Integrating components with the application core business logic
Implementing React-query based API consumers & managing server state caching logic
Improving the developer experience (testing, automation, etc.)
Updating existing components & integration of new components & workflows in our existing React, typescript web app
Collaborate with the entire development team to properly define new features & product behaviors
Requirements &Experience   Mastery of Typescript, HTML & CSS
Solid understanding of the React ecosystem
Solid understanding of the Webpack ecosystem
UI/UX acumen
Solution-driven
Strong English communication, french is a plus.
Experienced with remote work
5+ years of experience in a similar position
Based in Canada
Working With Us  Human First values entrepreneurial spirit, fostering creativity, self-motivation & different thinking. Responsible & autonomous individuals who are comfortable with light-weight processes will feel right  value expertise, passion and out-of-the-box mindsets so if your career path doesn’t seem quite traditional, don’t worry about it, chances are you’ll fit right in!
Originally based in Montreal, we have grown into a fully remote team with colleagues all over the world. Our communication channels include Slack, Gather, and Zoom, and we rely on Notion for documentation and JIRA for development work.
This is your chance to make a difference in a small team that’s scaling quickly & join our great startup adventure!

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Position Requirements
10+ Years work experience
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