Sigma Prime is looking for experienced Rust engineers who care deeply about decentralised systems, Ethereum infrastructure, and performance-critical software.
You will work on systems related to Ethereum block building, MEV infrastructure, and high-performance distributed systems, with opportunities to contribute across the broader Ethereum ecosystem, including Layer 2 infrastructure.
We are looking for engineers who enjoy working close to the protocol layer, optimising critical systems, and solving complex performance and networking problems.
This is an opportunity to work alongside experienced blockchain researchers and engineers on infrastructure used across the Ethereum ecosystem.
The CompanySigma Prime is a blockchain security and distributed systems consultancy focused on securing critical decentralised infrastructure.
Since 2016, we have worked with many of the most prominent teams in the industry, delivering security assessments, protocol research, design consultancy, and specialist engineering services across complex Web3 systems, distributed protocols, zero-knowledge systems, infrastructure, and smart contracts.
We are also the creators and maintainers of Lighthouse, an Ethereum consensus client used by roughly 40% of the network.
In addition, we build and maintain Anchor, an SSV client written in Rust and focused on decentralised validator infrastructure.
You will help design and evolve performance-critical infrastructure across Ethereum and adjacent systems.
The role focuses heavily on MEV-related systems, block building, transaction flow, latency-sensitive infrastructure, and distributed systems performance. There is also room to contribute across broader Ethereum infrastructure and protocol-adjacent tooling.
We are looking for engineers who enjoy deeply technical work, care about performance, and are motivated by complex distributed systems problems.
You may fit this role if you:Write high-performance Rust and enjoy optimising latency-sensitive systems
Have experience profiling and tuning systems using tools such as flamegraphs, async/runtime tuning, allocator optimisation, or lock contention analysis
Have strong EVM knowledge, including transaction execution mechanics, gas accounting, and state access patterns
Understand the MEV ecosystem, including proposer-builder separation, relays, private orderflow, and builder incentives
Have worked on MEV searching or MEV-adjacent systems
Understand mempool behaviour, transaction propagation, and orderflow infrastructure
Are passionate about Ethereum, proof-of-stake systems, and decentralised infrastructure
Enjoy working on low-level, performance-critical distributed systems
The ideal candidate is an Ethereum enthusiast with strong Rust experience who is excited to work alongside world-class blockchain engineers.
LocationSigma Prime is headquartered in Sydney, Australia, and operates as a remote-first company with team members globally.
Skills Required
- High-performance Rust programming skills
- Deep knowledge of EVM and transaction execution mechanics
- Understanding of the MEV ecosystem and block-building systems
- Experience with the transaction supply chain and mempool dynamics
- Passion for Ethereum and decentralised systems
What We Do
Sigma Prime specialises in information security, blockchain, and system design. Their team provides the expertise required to operate securely and efficiently in high-risk, dynamic and emerging environments, such as cryptocurrencies and distributed ledgers. Sigma Prime also founded and maintains Lighthouse, an open-source implementation of the Ethereum 2.0 specification written in Rust, and are heavily involved in Ethereum 2.0 engineering and research. Through this work, they will change the way people use computers to cooperate and communicate.
