Senior Frontend Software Engineer

Posted 8 Days Ago
San Francisco, CA
In-Office
140K-185K Annually
Mid level
Information Technology • Marketing Tech
Reacher powers creator marketing for the world's largest brands. YC S25.
The Role
As a Frontend Software Engineer, you will lead frontend features from design to implementation, shape architecture, mentor engineers, and build responsive UIs with React and TypeScript while directly impacting users.
Summary Generated by Built In
About Reacher:

We're the #1 TikTok Shop partner helping brands like Under Armour, Hanes, HeyDude, and Logitech scale their affiliate marketing. We've crossed 7 figures in ARR, and are rapidly scaling our team this year. Our vision is to become the Hubspot for creator marketing, powering brands and creators to connect and grow across all commerce platforms (Youtube Shopping, Instagram Shopping, Shopify, Amazon).

We're building key infrastructure for the creator economy and implementing AI with the world's largest brands and creators. Your work will directly impact users on day 1—our user base depends on our product daily.

Your work will directly impact users on day 1. We have a highly responsive user base that depends on our product day in and day out.

What you will do
  • Own frontend features end-to-end: research, design, implement, test, and ship

  • Lead and shape our frontend architecture—set standards for code quality, testing, and development practices

  • Mentor and guide other engineers, establishing frontend best practices and patterns

  • Talk directly to customers and translate vague requirements into polished user experiences

  • Build responsive UIs using React, TypeScript, Tailwind, and shadcn/ui

  • Write clean, maintainable, and testable code

  • Contribute to frontend architecture and state management decisions

  • Ship fast and learn fast—high urgency environment

You're a Fit If
  • You have 4–8 years of professional frontend experience at a product-first company

  • You can take mockups and build pixel-perfect, accessible, high-performance applications

  • You care deeply about product, design, and user flow—not just code

  • You've owned something meaningful end-to-end (a product module, design system, or major performance refactor)

  • You have experience setting technical standards and can be the go-to expert for frontend decisions

  • You enjoy mentoring others and raising the bar for engineering quality

  • You're resourceful and thrive in ambiguous environments—you figure things out independently

  • You have strong product intuition and can push back on requirements when needed to improve UX

Frontend-Specific Skills We Value
  • Core Stack: React, TypeScript, Next.js

  • Styling & Design: Tailwind CSS, shadcn/ui, translating Figma designs to production code

  • State & Data: State management (Redux, Zustand, React Query), consuming REST/GraphQL APIs

  • Quality & Testing: Jest, React Testing Library, Cypress/Playwright

  • Architecture: Design systems, web accessibility (WCAG), frontend performance optimization

  • Leadership: Code reviews, documentation, establishing conventions and best practices

Bonus Points If
  • You've worked at an early-stage startup or been a first/early engineering hire

  • You've built or maintained a design system (reusable component libraries)

  • You've led frontend initiatives or been the technical lead for a frontend team

  • You've worked with product analytics tools (Amplitude, Mixpanel) for data-driven development

  • You've built internal tooling, dashboards, or data visualization systems for thousands of users

  • You've worked directly with designers and can contribute to design discussions

  • You're comfortable with rapid iteration and shipping MVPs

  • You're curious about AI, e-commerce, or automation

  • You've shipped side projects or contributed to open-source

Why Join Us
  • Post-revenue company solving real problems for real customers

  • Be the frontend leader—define our frontend culture and standards as we scale

  • High autonomy and visibility—no boring tickets

  • Your code reaches users within days, not months

  • Strong engineering-first culture

  • Shape both the product and the company

When Applying:

Feel free to send a short note about something you've built and why this role excites you. GitHub/LinkedIn/resume is great, but we care more about how you think and build!

Top Skills

Cypress
Jest
Next.Js
Playwright
React
React Query
React Testing Library
Redux
Tailwind Css
Typescript
Zustand
Am I A Good Fit?
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The Company
HQ: San Francisco, California
17 Employees
Year Founded: 2024

What We Do

Reacher streamlines TikTok Shop influencer marketing by automating tedious tasks, eliminating the need to hire a VA or spend countless hours on influencer outreach and management.

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