Senior Software Engineer, Frontend

Sardine; United States; Remote; USD 140,000 - 210,000; Full time

Benefits offered by this job

Remote-first culture

Health insurance

401k matching

MacBook Pro

Home office stipend

Meal stipend

Learning stipend

Job summary

Sardine is hiring a frontend-focused Senior Software Engineer to own the design and delivery of user-facing experiences at the heart of our AI products. You’ll build polished, performant React/TypeScript interfaces and occasionally work in Go on backend services.

This is a high-autonomy, high-leadership role: mentor engineers, set frontend standards, and champion AI-assisted workflows to move fast. Sardine operates remote-first with teams across time zones, valuing results and collaboration.

Qualifications

• 7+ years of frontend software engineering experience.
• Expert-level React and TypeScript with UX focus.
• Fluency with AI tooling like Claude and productive use.
• Leadership in mentoring and setting technical standards.
• Experience shipping production‑grade frontend at scale.
• Backend Go knowledge is helpful but secondary to frontend.

Responsibilities

• Design, build, and own user-facing features in React and TypeScript.
• Set frontend direction and quality through mentorship.
• Leverage AI tools to accelerate development and establish best practices.
• Dip into Go to support backend services when needed.
• Collaborate with stakeholders to architect and deliver new experiences.
• Contribute to roadmaps and engineering culture.
• Document frontend usage to drive adoption.
• Help shape engineering culture and maintain high standards.

Skills

React

TypeScript

Frontend architecture

UX & accessibility

Go backend

Leadership

AI tooling

Tools

TypeScript

Golang

PostgreSQL

BigQuery

Terraform

Python

Java

Bigtable

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 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.

• We're a remote-first team spread across time zones, so no office to report to - work from wherever helps you do your best work. Just a couple of things to keep in mind: pay is based on where you're located, and you'll need to keep a home base in the country you're hired in. So while we love the "coffee shop today, mountains tomorrow" life, this isn't a passport-optional, work-from-anywhere-on-Earth kind of remote - think flexible within your country, not borderless.

Location:

Remote - To be considered for this position, you must reside in the Eastern Time Zone to meet the needs of the team.

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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