---
title: 'Senior Frontend Engineer at Halliday'
canonical: 'https://feeny.ai/job/senior-frontend-engineer-halliday-san-francisco-kgcskfdektz9'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Frontend Engineer at Halliday

- **Company:** Halliday
- **Location:** San Francisco, CA / New York, NY
- **Compensation:** $150k–$250k
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-06-19
- **Last confirmed live:** 2026-09-10
- **Apply:** https://jobs.ashbyhq.com/halliday/ee019f0c-5145-4847-b95f-0d0de242622b/application

**Skills:** React, TypeScript, State management, API integration, Responsive design, Performance optimization, Blockchain technologies, EVM-based chains, Solana, Bitcoin, ethers.js, viem, wagmi, Payment flows, Checkout experiences, Financial products, Full-stack development, APIs, Backend services, Design implementation

> Halliday is seeking a Senior Frontend Engineer to build consumer-facing crypto and payments products using React and TypeScript. The role involves designing high-performance interfaces, developing core infrastructure, and collaborating cross-functionally to drive technical excellence in a blockchain payments ecosystem.

## Job description

## About Halliday

Halliday is the end-to-end deposit platform, unifying every way a user funds their account into one seamless, fully embedded experience. Halliday Payments powers deposits for ecosystems like Story, XO Market, Stable, and MegaETH, helping them convert more users with less friction. Backed by a16z, #Hashed, SV Angel, and a_capital, Halliday's team includes alumni from Stanford, Harvard, Compound, Spotify, Dapper Labs, Netflix, Amazon, Stripe, and more.

## About the role

We're looking for a senior-level frontend engineer with deep React and TypeScript experience to build consumer-facing crypto and payments products. As a Frontend Engineer at Halliday, you'll build the user-facing products that power the future of blockchain payments. You'll design and implement intuitive, high-performance interfaces that make onchain transactions seamless for millions of users. This is an opportunity to work on cutting-edge technology with a talented team that's redefining how people interact with blockchain.

## What you'll be doing

Build User-Facing Products: Design and develop responsive, performant frontend applications using React and TypeScript that interact with blockchain networks, payment systems, and DeFi protocols while delivering an exceptional user experience. Develop Core Infrastructure: Build scalable components, design systems, and testing frameworks that support our payments platform and developer tools. Ship Developer Tools: Contribute to Halliday's public SDKs and APIs, making it easy for developers to integrate blockchain payments into their applications. Work Cross-Functionally: Collaborate with product, design, engineering, and partnerships teams to deliver features that solve real user problems and drive product adoption. Drive Technical Excellence: Identify and implement improvements to enhance performance, accessibility, security, and code quality across our frontend stack. Innovate on Web3 UX: Push the boundaries of what's possible in blockchain user experiences, making complex onchain actions feel simple and intuitive.

## What we’re looking for

Frontend Expertise: 5+ years of experience building production frontend applications with React and TypeScript. You write clean, maintainable code and care deeply about user experience. Technical Proficiency: Strong understanding of modern frontend development including state management, API integration, responsive design, and performance optimization. Product Mindset: You think beyond just implementing features, you understand the "why" behind what you're building and advocate for the best user experience. Fast Learner: You're excited to dive into new technologies, whether that's blockchain SDKs, payment APIs, or emerging web standards. Collaborative Spirit: You work well with cross-functional teams, communicate effectively, and thrive in a fast-paced startup environment. Location: Based in or willing to relocate to the San Francisco Bay Area or New York City.

Nice to haves Blockchain Experience: Previous work with blockchain technologies such as EVM-based chains, Solana, or Bitcoin. Familiarity with Web3 libraries like ethers.js, viem, or wagmi. Payments Background: Experience building payment flows, checkout experiences, or financial products. Full-Stack Capabilities: Comfort working across the stack when needed, including APIs and backend services. Design Sensibility: Strong eye for design and experience working closely with designers to implement pixel-perfect interfaces. Open Source Contributions: Active participation in open source projects or maintenance of public libraries.

Why Work at Halliday? A role with significant autonomy to build out the next generation infrastructure of the blockchain space. Competitive compensation package, with unlimited PTO and a friendly work environment. For international candidates - we offer visa sponsorship!

## Compensation

The base salary range for this role is $150,000 - $250,000. This reflects the minimum and maximum range across all US locations. This does not include equity or benefits.

The actual base pay is dependent upon many factors, such as: experience, relevant skills, and role level. Your recruiter can share more about the compensation and benefits applicable to your location during the hiring process.

## About Halliday

## Company Overview
- **One-liner**: Halliday is a blockchain company and product lab that provides a unified, cross-chain payments ecosystem, enabling users and developers to seamlessly onramp, bridge, swap, and deposit tokens through its flagship Halliday Payments platform.
- **Entity Type**: Private (Series A)
- **Headquarters**: San Francisco, California, United States (with an office in New York, NY)
- **Founded**: 2022
- **Founders**: Griffin Dunaif (Co-Founder, CEO)

## Core Business
- **Primary industry/industries**: Blockchain Services, Cross-Chain Payments, Financial Infrastructure
- **Target customers**: B2B — Primarily blockchain developers, DeFi protocols, and Web3 gaming companies (e.g., ApeChain, Story Protocol, DeFi Kingdoms).
- **Mission or purpose statement**: To rebuild the blockchain industry by removing friction from crypto workflows and enabling breakthrough applications to ship in hours, not years.

## Products & Services
- **[Halliday Payments](https://halliday.xyz/)**: A unified payments platform providing a set of modular tools—Onramps, Centralized Exchange (CEX) connectivity, Bridging, and Cross-Chain Swaps. It allows users to take onchain actions with minimal friction, routing payments through the best available options based on geography and method. Implementation is available via 7 lines of code or a flexible API. The system is fully non-custodial.
- **[Workflow Protocol](https://halliday.xyz/)**: The underlying protocol that powers Halliday’s products. It removes the need to code smart contracts by hand, allowing developers to create and deploy complex onchain workflows more quickly and efficiently.

## Market Standing
- **Valuation/Market Cap**: Not disclosed.
- **Key Metrics**:
- **Total Funding**: USD $26.0M (as of latest data).
- **Annual Revenue**: Estimated at USD $1.0M.
- **Funding Rounds**:
- **Seed Round** (August 4, 2022): USD $6.0M led by **a16z crypto** (with 5 investors).
- **Series A** (April 18, 2025): USD $20.0M (with 15 investors).
- **Notable Investors/Partners**: **a16z crypto** and **#Hashed** are lead investors. Key developer partners include ApeChain, Story Protocol, and DeFi Kingdoms.
- **Growth Signals**:
- Workforce growth of +36.8% year-over-year (from 9 to 16 employees).
- Expansion into serving a major Layer-1 blockchain (Story Protocol), reducing user onboarding time from 30+ minutes to seconds.
- Active hiring across Product Management, Front End Engineering, and Account Executive roles as of 2026.

## Competitive Advantages
- **Unified cross-chain experience**: Integrates top bridges and DEXs into a single, API-driven platform, eliminating the complexity for developers of managing multiple integrations.
- **Non-custodial by design**: Never takes custody of user funds, a key trust and security differentiator.
- **Developer speed**: The Workflow Protocol enables complex onchain applications to be built in “hours, not years,” and the Payments UI can be set up with just 7 lines of code.
- **Top-tier backing**: Backed by a16z and #Hashed, providing strong financial runway and a powerful network in the crypto/Web3 space.

## Strategic Focus
- **Product expansion**: Currently developing offramps to create a complete on/off ramp solution for any token or chain.
- **Scaling enterprise adoption**: Actively working with high-profile Layer-1 blockchains and gaming protocols to demonstrate enterprise-ready, frictionless user onboarding.
- **Talent acquisition**: Growing the team (currently ~16 people) across engineering, product, and go-to-market to scale the platform.

## Why Work Here
- **High-impact, autonomous roles**: Team members report having significant autonomy to shape their careers and the product direction. A VP of Product noted, "I've been given the autonomy to shape my career in the direction I wanted."
- **All-star team**: Work alongside alumni from Stanford, Harvard, Compound, Meta, Netflix, and Spotify.
- **Culture values**: Default to action (ship over perfect), long-term vision over short-term profits, and radical candor (truth over comfort).
- **Benefits & perks** ([halliday.xyz/careers](https://halliday.xyz/careers)):
- Comprehensive healthcare coverage
- Flexible time off (PTO)
- Company 401(k)
- Equity as part of offer
- Paid parental time off
- Commuter benefits
- Lunch expensed daily
- Regular team events and outings
- **Work locations**: Hybrid presence in San Francisco, CA and New York, NY.
- **Growth trajectory**: A young, well-funded Series A company with fast headcount growth (+36.8% YoY), offering early-stage equity and the ability to shape the product from the ground up.

## Sources
1. [halliday.xyz](https://halliday.xyz/)
2. [halliday.xyz/about](https://halliday.xyz/about)
3. [halliday.xyz/careers](https://halliday.xyz/careers)
4. [jobs.ashbyhq.com/halliday](https://jobs.ashbyhq.com/halliday)
5. [linkedin.com/company/halliday](https://www.linkedin.com/company/halliday)

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