About HeliusHelius 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 RoleWe’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 DoCreate clean, fast onboarding flows that directly drive conversion and activationBuild scalable backend services that power our user-facing applicationsDrive technical decisions around frontend architecture, state management, and API designImprove performance, reliability, and long-term maintainability across the stackMove quickly, make strong product calls, and simplify complex problemsWhat You'll Bring5+ years of full-stack development experience in production environmentsStrong proficiency with React and modern frontend developmentStrong backend experience with languages like Golang, C#, Java, or RustExperience building and maintaining REST/GraphQL APIsExperience with database design and optimizationStrong system design and architecture skillsUnderstanding of CI/CD practices and DevOps principlesDemonstrated ability to work autonomously and execute at speed with excellent communication and collaboration skillsNice to HavePrior experience building and maintaining billing systemsPrior startup and/or web3 experienceSolana development experienceUnderstanding of web security best practicesWhy Helius?High-impact work: Your code will power applications used by millions across the Solana ecosystem, including Coinbase, Jupiter, and PhantomSerious engineering: Build fast, reliable systems and user experiences across distributed infra, high-throughput backends, and modern frontend stacksOwnership & growth: Lead critical initiatives, influence architecture and product direction, and take on more responsibility as the company scalesRemote-first flexibility: Work where you’re most effective with a flexible, fully distributed teamCompetitive comp & perks: Market-leading salary, meaningful equity, generous vacation, wellness budgets, and support for learning and travelMission-driven team: Join ambitious builders who move fast, take ownership, and are shaping the future of decentralized apps