Sr. UI Engineer, Experiments

Helius is building the foundational infrastructure for Solana - empowering developers to create the next generation of crypto-powered applications. Our mission is to accelerate the development of internet capital markets by making it easier, faster, and more intuitive to build on-chain.

Thousands of teams, from startups to industry leaders like Coinbase, Phantom, and Jupiter, rely on Helius APIs, webhooks, and indexing tools to power their products. Backed by Haun Ventures, Founders Fund, and Foundation Capital, we’re a small, senior team building at the intersection of performance, usability, and decentralized systems.

Read our Helius Manifesto to learn how we build, make decisions, and operate as a team.

We’re forming a small, high-impact team at Helius to explore how people interact with on-chain data and financial systems.

You’ll be among the first engineers on a stealth initiative reshaping how people interact with on-chain financial systems. You’ll build sleek, lightning-fast interfaces for real-time data and reimagine how developers, traders, and institutions engage with markets.

This is a rare opportunity to work directly with our founders and product leadership — owning the front-end experience from concept to production and helping define the visual language of a new class of financial products.

• Build sleek, responsive UIs for a data-heavy, real-time application

• Collaborate closely with product, design, and engineering leaders to shape the vision and architecture

• Prototype and iterate quickly - experimenting with new patterns, interactions, and frameworks

• Push the limits of what’s possible in performance, usability, and visual polish

• Help define and evolve our design system for a new class of web3 products

• 4+ years of experience building world-class front-end applications (React, TypeScript, Next.js, or similar)

• Deep care for design, motion, and micro-interactions — you sweat the details

• Experience creating high-fidelity, data-rich interfaces (dashboards, terminals, analytics tools, etc.)

• Ability to thrive in ambiguity and take ideas from concept to launch with minimal guidance

• Strong product intuition and a bias toward simplicity and speed

• Open-source contributions or side projects that showcase exceptional UI craft

• Experience at design-obsessed companies (e.g. Apple, Robinhood, Stripe, Figma, Notion)

• Background in data visualization, streaming systems, or trading platforms

• Familiarity with Solana or blockchain infrastructure

• High-impact work: Your code will power applications used by millions across the Solana ecosystem - including Coinbase, Phantom, and Jupiter

• Design-driven culture: We care deeply about craft, polish, and performance - every detail matters

• Small team, huge scope: Join a lean, senior team where you’ll have outsized ownership and influence from day one

• Cutting-edge tech: Build with React, TypeScript, Next.js, Go, and Solana - plus get hands-on exposure to real-time blockchain data

• Remote-first flexibility: Work where you’re most productive, with flexible hours and a globally distributed team