Senior Software Engineer, Frontend

Mixpeek; Canada; Hybrid; CAD 120,000 - 180,000; Full time

Benefits offered by this job

Generous cash and equity compensation

Remote-first culture

Flexible PTO and year-end break

Health insurance (Canada)

Job summary

Sardine is hiring a frontend-focused Senior Software Engineer to own user-facing experiences in React and TypeScript within our AI products. You will mentor engineers, set frontend standards, and leverage AI tools like Claude to accelerate delivery.

Occasional Go backend work complements frontend efforts, all within a remote-first, Canada-based context. You will collaborate with stakeholders to craft scalable, polished interfaces and drive the engineering culture forward with high-quality,

Qualifications

• 7+ years of proven experience as a software engineer with deep frontend focus.
• Expert-level React and TypeScript with strong UX, performance, and accessibility.
• Fluency with AI and agentic coding tools (Claude) to ship efficiently.
• Leadership experience: setting technical standards, mentoring engineers, driving decisions.
• Track record of shipping high-quality frontend at scale.
• Go backend experience is a plus but secondary to frontend work.

Responsibilities

• Design, build, and own user-facing features in React/TypeScript.
• Set frontend technical direction and quality standards; mentor teammates.
• Leverage AI-assisted tooling to speed development and establish best practices.
• Do backend work in Go when needed to support frontend features.
• Collaborate with stakeholders to translate requirements into experiences.
• Contribute to product and engineering roadmaps and maintain docs.
• Help shape engineering culture and maintain high standards.

Skills

React

TypeScript

AI tools-Claude

Frontend leadership

Go (basic)

Tools

Golang

Claude

Job description

Who we are:

Sardine is the leading agentic risk platform for fighting financial crime. Our integrated solution unifies data across risk teams to help organizations stop fraud in real time, prevent AI-driven attacks, and automate fraud and AML operations. Sardine’s platform is strengthened by one of the fastest-growing fraud consortiums in the market, spanning more than 6 billion profiled devices, 800 million consumers, and 3 million businesses worldwide. Leading companies including FIS, GoDaddy, Intuit, Edward Jones, ZoomInfo, and Checkout.com rely on Sardine to secure and grow trust in their products.

Our culture:

• We have hubs in the Bay Area, NYC, Austin, Toronto, and São Paulo. However, we maintain a remote-first work culture. #WorkFromAnywhere

• We hire talented, self-motivated individuals with extreme ownership and high growth orientation.

• We value performance and not hours worked. We believe you shouldn't have to miss your family dinner, your kid's school play, friends get-together, or doctor's appointments for the sake of adhering to an arbitrary work schedule.

Location:

Remote — Canada (Eastern Time) To be considered for this position, you must reside in one of the following locations and be legally authorized to work in Canada:

• Ontario

About the Role:

As a frontend-focused Senior Software Engineer, you will own the design and delivery of the user-facing experiences at the heart of our AI products. Your primary focus is building polished, performant, production-grade interfaces in React and TypeScript. You'll also work in Go on the backend services and APIs that power those experiences, but that's a secondary part of the role. This is a high-autonomy, high-leadership position: you'll develop new features at scale, set the standard for how we build on the frontend, mentor the engineers around you, and use AI/agentic tooling (like Claude) to ship far faster than a traditional team would. The ideal candidate pairs exceptional frontend craft with the judgment to lead and the discipline to be relentlessly efficient with modern, AI-assisted workflows.

What you'll be doing:

• Design, build, and own user-facing features in React and TypeScript — polished, accessible, performant, and production-ready.

• Set the technical direction and quality bar for our frontend, and lift the people around you through mentorship and code review.

• Use AI and agentic development tools (such as Claude) fluently and effectively to move quickly, and help establish best practices for AI-assisted development across the team.

• Dip into Go to build and extend the backend services and APIs behind your features when needed.

• Collaborate closely with business stakeholders to architect and implement new experiences from inception to delivery.

• Contribute to product and technical roadmaps, and to the broader direction of the engineering team.

• Craft and maintain user-facing technical documentation that drives understanding and adoption of our products.

• Play a pivotal role in shaping our engineering culture and ensuring high standards across the organization.

What you'll need:

• 7+ years of proven experience as a software engineer, with deep specialization in frontend development.

• Expert-level React and TypeScript, with a strong eye for UX, performance, and accessibility.

• Demonstrated fluency with AI and agentic coding tools (e.g., Claude), and a track record of using them to ship efficiently and raise your own throughput.

• Leadership experience: setting technical standards, mentoring engineers, and driving key technical decisions.

• A track record of shipping high-quality, production-grade frontend at scale.

• Working proficiency in Go (or the ability to become productive in it quickly) for backend services — secondary to your frontend work.

• Comfort with ambiguity and the ability to prioritize autonomously against business needs.

• Customer-centric approach with strong empathy toward users.

• Relevant industry experience in fintech, fraud, compliance, risk, or regulated systems is preferred.

• Proficient in English — from casual chats to formal reports.

• Exposure to data tooling or pipelines is a nice-to-have, but not required.

Technologies we use:

• TypeScript (React + Node)

• Golang

• Bigtable

• Postgres / PostgreSQL

• BigQuery

• Python

• Java

• Terraform

Benefits we offer:

• Generous compensation in cash and equity

• Early exercise for all options, including pre-vested

• Work from anywhere: Remote-first Culture

• Flexible paid time off and Year-end break

• Health insurance, dental, and vision coverage for employees and dependents - US and Canada specific

• 4% matching in 401k / RRSP - US and Canada specific

• MacBook Pro delivered to your door

• One-time stipend to set up a home office — desk, chair, screen, etc.

• Monthly meal stipend

• Monthly social meet-up stipend

• Annual health and wellness stipend

• Annual Learning stipend

Join a fast-growing company with world-class professionals from around the world. If you are seeking a meaningful career, you found the right place, and we would love to hear from you.

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