Senior Software Engineer, Backend

As a Senior Software Engineer, Backend at Helius, you take ownership of one of our core systems-Gatekeeper, Data Streaming, Historical APIs, or Account Index. These are the foundational layers of Helius's infrastructure, operating at the intersection of extreme performance requirements and real-world scale, sitting in the critical path of the Solana ecosystem. At this level, you set technical direction, make architectural decisions that shape the platform for years, and raise the bar for everyone around you. You work directly with founders and engineering leadership to define what we build and how we build it, owning your domain end-to-end.

What you'll do

• Design, build, and release novel, performance-sensitive products that transform the developer experience on Solana
• Optimize production systems through profiling, benchmarking, and improving latency and throughput
• Collaborate with staff engineers and founders on architectural and product decisions
• Improve operational excellence through better observability, incident response, and making systems easier to run
• Mentor junior engineers and raise the technical bar across the team

What you bring

• 5+ years of backend engineering experience with a track record of shipping production systems at scale
• Strong systems-level intuition-you understand what's happening beneath the abstractions
• Proficiency in Rust (strongly preferred), C++, or Go
• Experience debugging and optimizing latency-sensitive or high-throughput systems
• Demonstrated ability to own problems end-to-end with minimal direction
• High intensity and high ownership-you hold yourself to an exceptional standard
• Prior exposure to engineering cultures that prioritize operational excellence, reliability, and customer impact

Nice to have

• Deep Rust experience in a production, performance-critical environment
• Experience with distributed systems, storage engines, or streaming infrastructure
• Familiarity with profiling tools such as flamegraphs, perf, or valgrind
• Interest in Solana, blockchain infrastructure, or real-time financial systems
• On-call experience and operational ownership of production services
• Mix of large and small company experience-you've built the habits and can operate at both speeds

What we offer

• Market-leading salary and meaningful equity
• Fully remote and flexible work
• Generous vacation and wellness budgets
• Support for learning and travel

About Helius

Helius is a leading developer platform on the Solana blockchain, dedicated to inspiring and accelerating the creation of crypto-powered software. Customers like Coinbase, Jupiter, and Phantom use Helius to power their applications on Solana. The company has raised over $34m from Haun Ventures, Founders Fund, Foundation Capital, 6th Man Ventures, Reciprocal Ventures, Chapter One, and angel investors including Solana co-founders Anatoly Yakovenko and Raj Gokal.