Fullstack

Front-end for multi-asset margin trading

Blockchain Engineer

Blockchain & Smart Contract EngineeringConfirmed live in the last 24 hours

Full-timeNew York, NY, USA$200k - $300k /yr

About the Job

Requirements

At least 2 years of experience building blockchain systems or consensus engines in Rust, beyond smart-contract development.
Deep understanding of memory management, concurrency, and performance optimization.
Strong grasp of leader election and state machine replication, with experience using consensus protocols such as PBFT, HotStuff, Tendermint, or similar.
Experience with low-level storage engines such as RocksDB or MDBX, optimizing state trie structures, and key-value stores.
Solid fundamentals in applied cryptography, including elliptic curves, BLS signatures, and threshold schemes.
Experience with peer-to-peer networking and gossip protocols, and ability to reason about network partitions and adversarial conditions.
Must be authorized to work in the United States.
Ability to thrive in high-bandwidth, in-person engineering environments.

Responsibilities

Build foundational infrastructure for a next-generation trading platform.
Design and ship core blockchain systems prioritizing reliability, speed, and precision under real-world conditions.
Work in consensus, networking, and execution layers.
Collaborate with product and frontend teams to ensure the underlying protocol delivers a seamless end-user experience.
Implement, harden, and extend consensus protocols to guarantee safety and liveness under adversarial network conditions.
Design and optimize state transition functions, and handle block proposal, voting, and finalization logic.
Work with Ethereum-compatible execution clients and bridge the consensus layer with the execution engine.
Implement payload building, block validation, and state root verification.
Design execution extensions for data pipelines.
Implement signature schemes for validator authentication and vote aggregation, and work with threshold signatures, BLS aggregation, or similar schemes.
Ensure cryptographic security across the stack.
Optimize block times, transaction throughput, and state storage; profile consensus-critical paths; and design for horizontal scalability and network growth.

Desired Qualifications

Experience with cross-chain bridges, interoperability protocols, or multi-chain architectures.

The Role

As a Blockchain Engineer at Fullstack, you will build the foundational infrastructure that powers a next generation trading platform. You will design and ship core blockchain systems that prioritize reliability, speed, and precision under real world conditions. You will work deep in consensus, networking, and execution layers. You will collaborate closely with product and frontend teams to ensure the underlying protocol delivers a seamless experience for end users, even in the most demanding market conditions.

What You’ll Build & Solve

Consensus & State Machines: Implement, harden, and extend consensus protocols to guarantee safety and liveness under adversarial network conditions. Design and optimize state transition functions. Handle block proposal, voting, and finalization logic.

Execution Layer Integration: Work with Ethereum-compatible execution clients. Bridge consensus layer with execution engine. Implement payload building, block validation, and state root verification. Design execution extensions for data pipelines.

Cryptographic Primitives: Implement signature schemes for validator authentication and vote aggregation. Work with threshold signatures, BLS aggregation, or similar schemes. Ensure cryptographic security across the stack.

Performance & Scalability: Optimize block times, transaction throughput, and state storage. Profile consensus critical paths. Design for horizontal scalability and network growth.

What You Bring

Experience: 2+ years building blockchain systems or consensus engines in Rust (not just smart contracts). Deep understanding of memory management, concurrency, and performance optimization.

Distributed Systems: Strong grasp of leader election, state machine replication. Experience with consensus protocols like PBFT, HotStuff, Tendermint, or similar.

Storage & Performance: Comfortable working with low-level storage engines (RocksDB, MDBX) and optimizing state trie structures. Know your way around key-value stores.

Cryptography: Solid fundamentals in applied cryptography: elliptic curves, BLS signatures, threshold schemes.

Networking: Experience with P2P networking and gossip protocols. Can reason about network partitions and adversarial conditions.

Cross-Chain (Bonus): Experience with cross-chain bridges, interoperability protocols, or multi-chain architectures.

In-Person Collaborator: Thrive in high-bandwidth, in-person engineering environments.

Work Authorization: Must be authorized to work in the United States.

About the Company

Fullstack

Front-end for multi-asset margin trading

Fullstack provides a multi-asset margin front end for Hyperliquid, offering a single interface to manage margin across different assets. It works by aggregating and displaying margin requirements, positions, and risk in one unified UI, enabling users to trade and monitor their Hyperliquid accounts across multiple assets from one screen. The platform differentiates itself by positioning as the only front end you’ll ever need, consolidating asset types and margin controls into a single, cohesive experience and reducing the need to switch between multiple tools. The goal is to give traders a straightforward, comprehensive workspace to access and manage all margin-related activities on Hyperliquid through one front-end.

Company size: Not listed
Company stage: Not listed
Total funding: Not listed
Headquarters: New York City, United States
Founded: 2025

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