Blockchain Core Engineer

Celo • Full-time • Berlin • 1w ago

cLabs is looking for a Blockchain Core Engineer to grow the Blockchain team, which is responsible for the Celo's blockchain node. This role involves working on a go-ethereum based node with transformations that make the Celo blockchain unique (such as the consensus engine).

Our main challenges are scaling the network, improving its security and resiliency, and adding new features that can only be done at node level (such as paying for gas fees with an ERC20 token) to the Celo ecosystem .

In the Blockchain team, we collaborate with other engineering teams within cLabs. This includes other platform teams such as the Primitives team (as we constantly access smart contracts as part of our operation), and user-facing teams such as the Developer Tools teams (as a big part of our job is to make end users' and contributors' lives easier). We also collaborate with other teams to design and implement the right incentives for our validators and full nodes.

This is a role with wide exposure to many areas of the stack, and you'll quickly get acquainted with all the moving parts in a modern blockchain project.

You will

Collaborate with teammates and design the Celo protocol
Contribute to the Celo blockchain client (L1 and L2), making sure it works as expected
Perform load testing and performance optimization, identifying bottlenecks and optimal parameters for healthy functioning of the chain
Write documentation outlining the specifics of the Celo protocol

You have

Prior blockchain knowledge and development experience
Golang knowledge, ideally familiar with geth / optimism / erigon or other golang-based Ethereum clients
Distributed systems design skills and development experience
Good debugging skills, good understanding of how to figure out why things behave in unexpected ways
Good communication skills, both written and verbal
Responsible attitude to work, strong work ethics

cLabs ("Celo Labs") started Celo in 2017 and is one of many contributors to the open source project Celo. cLabs builds financial technology to enable prosperity of all beings.

To build technology and products that are used and loved by people and solve real-world problems, we need to build a team with many different perspectives and experiences. We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We encourage candidates from all backgrounds to apply and always consider qualified applicants with arrest and conviction records, in accordance with the San Francisco Fair Chance Ordinance.