Staff Backend Engineer, Historical APIs at Helius Labs

<h2><strong>About Helius</strong></h2><p style="min-height:1.5em">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.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">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.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">Read our<a target="_blank" rel="noopener noreferrer nofollow" href="https://helius-api.notion.site/The-Helius-Manifesto-1510b5a55cc5802eb3f8e41f539ed810"> <u>Helius Manifesto</u></a> to see how we work and what we value.</p><p style="min-height:1.5em"></p><h2><strong>About the Role</strong></h2><p style="min-height:1.5em">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.</p><p style="min-height:1.5em"></p><h2><strong>About the Team</strong></h2><p style="min-height:1.5em">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.</p><p style="min-height:1.5em"></p><h2><strong>What You'll Do</strong></h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Architect and lead the development of ingestion, indexing, and retrieval systems across our archival infrastructure</p></li><li><p style="min-height:1.5em">Drive technical strategy for API performance, reliability, and scalability across high-throughput services</p></li><li><p style="min-height:1.5em">Design and optimize data models and query patterns for ClickHouse, Postgres, and RocksDB at scale</p></li><li><p style="min-height:1.5em">Lead system design discussions and make architectural decisions on caching, distributed data patterns, and performance trade-offs</p></li><li><p style="min-height:1.5em">Set standards for operational excellence, debugging methodologies, and performance profiling across production systems</p></li><li><p style="min-height:1.5em">Mentor senior engineers and elevate the team's