Senior Full-Stack Engineer (TypeScript + Go)

Company Introduction

Highline offers a smarter way to pay and get paid. Through Highline’s intelligent payment network, consumers can make payments directly from their paychecks and access lower-cost credit, easier approvals, and faster loan repayment that minimizes interest. This automated experience ensures on-time bill payment without the hassle of managing balances or overdraft fees.

Billers and lenders benefit from a more reliable, lower-cost payment method and penalty-free payments. We believe everyone should keep more of their money – so we’ve built Pay by Paycheck.

Founded by a team with deep fintech, payments, and payroll-linked product experience, Highline is backed by top-tier VCs including Foundation Capital, Costanoa Ventures, and Jump Capital.

Join us in building the future of payments!

Highline is a fully remote company for U.S.-based candidates. We are not currently able to offer visa sponsorship.

What you’ll be doing

We are hiring a Senior Full-Stack Engineer (TypeScript + Go) to own and scale Highline’s frontend platform and user-facing applications. This is a high-ownership role where you will operate as the primary frontend engineer, responsible for multiple applications and the overall frontend architecture.

You will:

• Own and maintain four deployable applications across the platform:

  • Portals (member, client, and internal support) built from a shared Next.js codebase

  • Highline Link enrollment SDK (Angular, embedded on partner/merchant domains)

  • Marketplace UI (Next.js)

  • Demo site (React + Go)

• Architect, build, and maintain frontend systems using:

  • TypeScript, React (v18+), Next.js (App Router + Pages Router), Angular (v19+)

• Design and implement authentication flows (JWT, MFA, session management)

• Build and maintain SSR/SSG applications and optimize performance and scalability

• Develop and maintain JavaScript SDKs for external partner integration

• Ensure strong developer experience for partners integrating with Highline

• Implement and maintain frontend observability (error tracking, performance monitoring)

• Establish and uphold strong testing practices, including E2E testing

• Work with tools and libraries such as React Query, Axios, SCSS, and modern frontend patterns

• Build and maintain Web Components (Angular Elements, Shadow DOM)

• Collaborate with backend engineers and contribute to Go services when needed

• Work within CI/CD pipelines and deployment workflows (GitHub Actions, Docker)

• Make autonomous decisions on:

  • Framework evolution and migration strategy

  • Build and deployment pipelines

  • SDK versioning and backward compatibility

  • Overall frontend architecture and standards

What we are looking for

• 5–8+ years of full-stack or frontend-focused engineering experience

• Strong expertise in TypeScript and modern frontend frameworks

• Deep experience with:

  • React (v18+), Next.js (App Router and Pages Router)

  • Angular (v19+)

• Experience building and owning production-grade frontend applications

• Strong understanding of:

  • SSR/SSG patterns

  • Authentication systems (JWT, MFA, session management)

  • API integration patterns

• Experience developing SDKs or embedded frontend systems

• Familiarity with:

  • React Query, Axios, SCSS

  • Web Components (Angular Elements, Shadow DOM)

• Experience with frontend observability tools (error tracking, performance monitoring)

• Comfort working across the stack, including contributing to Go backend services

• Experience with CI/CD pipelines and deployment workflows (GitHub Actions, Docker)

• Strong testing mindset, including E2E testing

Bonus:

• Experience with WordPress

What success looks like

• You become the owner of Highline’s frontend platform and applications

• You deliver a consistent, scalable, and high-quality user experience across all products

• You improve performance, reliability, and developer experience for both internal teams and external partners

• You successfully manage and evolve multiple frameworks and codebases

• You make sound architectural decisions that scale as the company grows

Why Highline

• Own and shape the entire frontend platform at a fast-growing fintech company

• Work on products used across consumers, partners, and internal teams

• Backed by top-tier VCs: Foundation Capital, Costanoa Ventures, and Jump Capital

• High autonomy, high ownership, and high impact

• Opportunity to define frontend architecture and standards from the ground up

Compensation and Benefits

• Competitive salary + equity (range based on experience and level)

• Flexible PTO

• Medical, dental, and vision insurance (including dependents)

• Mental health and wellness program

• Parental leave