Helius is hiring a Senior Full-stack Engineer to spearhead the overhaul of our product experience and monetization systems. You'll architect, design, and implement systems that directly influence our product, revenue, and customer impact. This is a high-ownership, high-impact role ideal for someone who thrives on autonomy, breadth, and building foundational infrastructure at startup speed.

What You'll Do

Architect and optimize complex systems that span across the frontend and the backend.
Integrate complex backend systems (billing, monetization, product enablement) into customer-facing applications.
Collaborate directly with founders and product owners to translate requirements into well-architected solutions.
Optimize application performance across the entire stack.
Drive technical decisions around frontend architecture, state management, and API design.
Influence our technical roadmap, provide mentorship and help build a strong engineering culture.
Step outside of your role as needed to close gaps and keep product development moving fast.
Ensure system scalability, performance, and reliability across the stack.

What We're Looking For

5+ years of full-stack development experience in production environments.
Strong frontend experience with React, Next.js, and TypeScript (2+ years).
Senior-level backend experience with Go, TypeScript, or similar languages (3+ years).
Experience building and scaling APIs (REST or GraphQL).
Experience with database design and optimization.
Strong system design and architecture skills.
Understanding of CI/CD practices and DevOps principles.
Demonstrated ability to work autonomously, execute at speed, with excellent communication and collaboration skills.
Track record of mentoring other engineers and improving team processes.
Ability to thrive in a high-velocity startup and work across teams.

Nice to Have

Experience building or maintaining billing/monetization systems.
Previous startup and/or web3 experience.
Familiarity with Rust or low-level systems.
Solana development experience.
Understanding of web security best practices.

Technical Stack

Next
React
TypeScript
AWS
Go
REST
GraphQL
Rust

Team & Environment

You'll be leading a fast-growing team and reporting to the Head of Engineering. Our culture is built by mission-driven, ambitious builders who move fast, take ownership, and are passionate about shaping the future of decentralized apps.