Senior Software Engineer, Frontend

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, Zoom Info, and  rely on Sardine to secure and grow trust in their products.

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

• 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.

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

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 Type Script. 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.

• Design, build, and own user-facing features in React and Type Script — 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.

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

• Expert-level React and Type Script, 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…