Sr. Full-Stack Engineer, Developer Portal

About Helius

Helius is building the core 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 early-stage 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 obsessed with performance, simplicity, and scalability in decentralized systems.

Read our Helius Manifesto to see how we work and what we value.

About the Role

We’re looking for a Sr. Full-Stack Engineer to own the most critical parts of the Developer Portal: onboarding, configuration, enablement, and observability. These surfaces are instrumental to providing a top-tier customer experience, maximizing conversion and retention. The expectations are high, decisions move fast, and the work you ship will be used immediately by thousands of developers.

You’ll work across React, TypeScript, Next.js, Golang, and Postgres. You’ll partner closely with founders and product leadership, raise the bar on quality, and take full ownership of features end-to-end.

What You’ll Do

• Create clean, fast onboarding flows that directly drive conversion and activation

• Build scalable backend services that power our user-facing applications

• Drive technical decisions around frontend architecture, state management, and API design

• Improve performance, reliability, and long-term maintainability across the stack

• Move quickly, make strong product calls, and simplify complex problems

What You’ll Bring

• 5+ years of full-stack development experience in production environments

• Strong proficiency with React and modern frontend development

• Strong backend experience with languages like Golang, C#, Java, or Rust

• Experience building and maintaining REST/GraphQL APIs

• Experience with database design and optimization

• Strong system design and architecture skills

• Understanding of CI/CD practices and DevOps principles

• Demonstrated ability to work autonomously and execute at speed with excellent communication and collaboration skills

Nice to Have

• Prior experience building and maintaining billing systems

• Prior startup and/or web3 experience

• Solana development experience

• Understanding of web security best practices

Why Helius?

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

• Serious engineering: Build fast, reliable systems and user experiences across distributed infra, high-throughput backends, and modern frontend stacks

• Ownership & growth: Lead critical initiatives, influence architecture and product direction, and take on more responsibility as the company scales

• Remote-first flexibility: Work where you’re most effective with a flexible, fully distributed team

• Competitive comp & perks: Market-leading salary, meaningful equity, generous vacation, wellness budgets, and support for learning and travel

• Mission-driven team: Join ambitious builders who move fast, take ownership, and are shaping the future of decentralized apps