Blockchain Engineer

Rollco Digital; Singapore; On-site; SGD 70,000 - 90,000; Full time

Job summary

A leading digital technology company in Singapore is seeking an experienced Software Engineer to extend the Geth client and develop an EVM-based swap simulator. Candidates should have a solid understanding of Ethereum internals and proficiency in Golang or Rust. The position offers collaboration with top talent and an opportunity to make a positive impact in the blockchain space through innovative projects.

Benefits

Work alongside & learn from best in class talent

Solid track record of success

Opportunity to make a positive impact

Qualifications

• At least 3 years of experience in a Software Engineer or System Architect role.
• Proficiency in Golang and/or Rust programming.
• Deep understanding of Ethereum internals, EVM execution, and Geth client architecture.

Responsibilities

• Extend or customize the Geth client to index liquidity pools.
• Develop an EVM-based swap simulator.
• Implement routing algorithms for optimal swap paths.
• Build high-performance transaction builder.
• Benchmark aggregator performance against leading APIs.
• Optimize system performance for low latency and scalability.
• Collaborate on APIs or dashboards for swap routes.

Skills

Golang

Rust

Blockchain data parsing

Understanding of DeFi protocols

Job description

The Role:

• Extend or customize the Geth client (or Rust-based executor) to index liquidity pools directly from on-chain state.
• Develop an EVM-based swap simulator to compare swap outcomes across multiple DEXs (Uniswap, 1inch, ParaSwap, KyberSwap).
• Implement routing algorithms (e.g., graph-based shortest path) to determine optimal swap paths.
• Build high-performance transaction builder to generate, sign, and broadcast raw transactions.
• Benchmark aggregator performance against leading API-based aggregators (1inch, Paraswap).
• Optimize system performance for low latency and scalability.
• Collaborate on building APIs or dashboards for exposing swap routes and analytics.

Ideal Profile:

• You have at least 3 years experience, ideally within a Software Engineer or System Architect role.
• Proficiency in Golang and/or Rust programming.
• Deep understanding of Ethereum internals, EVM execution, and Geth client architecture.
• Experience with blockchain data parsing, state inspection, and transaction simulation.
• Strong knowledge of DeFi protocols, especially Uniswap, Curve, Balancer, and other DEXs.

What's on Offer?

• Work alongside & learn from best in class talent
• Work within a company with a solid track record of success
• Opportunity to make a positive impact