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 https://www.helius.dev/blog/manifesto to see how we work and what we value. ABOUT THE ROLE 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 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 - 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 - Lead system design discussions and make architectural decisions

Staff Backend Engineer, Historical APIs