Staff Backend Engineer, Historical APIs

About Helius

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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

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We're looking for a Staff Backend Engineer who wants to own and evolve serious infrastructure. This isn't about executing on a roadmap - you'll define technical direction, architect systems that scale to multi-petabyte datasets, and set the standard for engineering excellence across the team. You'll work autonomously on high-impact problems, mentor senior engineers, and drive architectural decisions that shape the future of our infrastructure.

About the Team

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The Archival team exposes APIs for querying Solana’s multi-petabyte ledger with sub-100ms. If you love the challenge of large datasets and low-latency performance engineering, this is the right team for you. The team moves fast, owns an enormous surface area, and operates like a small group of founders sitting in the critical path of the company.

What You'll Do

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• Architect and lead the development of ingestion, indexing, and retrieval systems across our archival infrastructure
• Drive technical strategy for API performance, reliability, and scalability across high-throughput services
• Design and optimize data models and query patterns for ClickHouse, Postgres, and RocksDB at scale
• Lea...