* Strong foundational understanding of Ethereum mechanics
* Mempool
* Transactions and Events
* Gas
* Solidity experience
* Experience writing and deploying Solidity code to Ganache, Kovan, and Mainnet
* Ability to write full test coverage using Waffle, Mocha, and Chai
* Knowledge of common security vulnerabilities and infamous hacks
* Knowledge of popular design patterns and mechanics used in top DeFi projects
* JavaScript (web3 / ethers) + NodeJS / ReactJS Full-Stack Experience
* Ability to create scrips for deploying and maintaining contracts
* Ability to pull on-chain data and send transactions
* Ability to create a working front-end to interface with smart contract code
* Experience integrating with Ethereum service providers
* Etherscan / Alchemy
* TheGraph.com
* Etc

Smart contracts

Solidity

Web3

Remote

Smart Contract Engineer

We are a team of builders and researchers on a mission to empower enterprises and developers worldwide to access and build on decentralized systems.

Our expertise covers several domains: Ethereum and Starknet protocol engineering, layer-2, cryptography research, protocol research, decentralized finance (DeFi), security auditing, formal verification, real-time monitoring, smart contract development, and dapps and enterprise engineering.

Working to solve some of the most challenging problems in the blockchain space, we frequently collaborate with, such as Ethereum Foundation, Starknet Foundation, Gnosis Chain, Flashbots, Forta Protocol, Lido, EigenLayer, Open Zeppelin, RISCZero, Aleph Zero, and many more.

Today, there are nearly 200 of us working remotely from over 45+ countries.

# Are you the one?

If you've envisioned yourself at the forefront of AI and Web3 innovation, then Nethermind offers the perfect opportunity to transform that vision into reality.

Nethermind is a Blockchain Research and Software Engineering company. We empower enterprises and developers worldwide to access and build on the decentralized web. Our work touches every part of the blockchain ecosystem - from fundamental cryptography research to application-layer protocol development.

We are currently seeking talented and passionate Blockchain Engineers with proficiency in Rust programming to join our growing AI and ZK teams. Successful candidates will design, develop and optimize protocols and applications fundamental to the advancement of Web3. Our projects range from core protocol development of ZK components for Starknet to design and development of Hardware and Software for Worldcoin.

# Responsibilities:

* Perform R&D
* Designing and development of distributed and fault-tolerant systems
* Optimization and contribution to closed and open source projects
* Collaboration with internal and external teams within the Web3 community
* Opportunity to work with the top software engineers and research professionals to solve the toughest technical challenges
* Working with the latest tools and technologies
* Stay updated with new developments and technology in the blockchain space

# Skills:

* Excellent programming skills - Rust experience required
* Deep understanding of Ethereum blockchain architecture
* Understanding of good software architecture and engineering process
* Ability to write clean, testable, and maintainable code without over-engineering
* An entrepreneurial nature, willing to take ownership and run toward problems
* Several years of experience in software development and a strong Computer Science background
* A fascination with the inner working of blockchains

# Nice to have:

* Experience with development on Starknet and Cairo language
* Familiarity with zk proof systems (ZK-STARK, ZK-SNARKs)
* Cryptography
* Mathematics Background
* Having activity on GitHub is a significant advantage (please include links to projects or PRs that you have submitted to external projects)

Blockchain Systems Engineer

Status is building the tools and infrastructure for the advancement of a secure, private, and open web3. 

With the high level goals of preserving the right to privacy, mitigating the risk of censorship, and promoting economic trade in a transparent, open manner, Status is building a community where anyone is welcome to join and contribute.

As an organization, Status seeks to push the web3 ecosystem forward through research, creation of developer tools, and support of the open source community. 

As a product, Status is an open source, Ethereum-based app that gives users the power to chat, transact, and access a revolutionary world of DApps on the decentralized web. But Status is also building foundational infrastructure for the whole Ethereum ecosystem, including the Nimbus ETH 1.0 and 2.0 clients, the Keycard hardware wallet, and the Waku messaging protocol; the p2p communication layer for Web3.

As a team, Status has been completely distributed since inception.  Our team is currently 200+ core contributors strong, and welcomes a growing number of community members from all walks of life, scattered all around the globe. 

We care deeply about open source, and our organizational structure has minimal hierarchy and no fixed work hours. We believe in working with a high degree of autonomy while supporting the organization's priorities.

# The role

DevOps is a buzzword, but it's also generic enough to encompass the breadth of tasks required in supporting development teams. There are many ways to make the lives of developers easier, and everyone has their own best way, which also means every team has their own way. There is no perfect way to make everyone happy with the same thing.

Supporting developers involves debugging obscure bash scripts from years ago that nobody remembers. It means biting on a piece of wood and using data formats turned programming languages like YAML to configure CI jobs. It means tracking down minute differences between releases of packages and libraries causing unexpected crashes. It means rewriting the same Dockerfile for the 5th time to allow a project to use one more obscure library. Or tracking down absurd race conditions of multi-threaded tests running in parallel on the same host. Or pulling your hair out at a bug only to realize it works fine after the CI worker host is restarted.

But fundamentally it means wrestling it all into submission and making it run smoothly... at least for as long as you're there.

If you have the guts to fight against entropy and deterioration of the reality we inhabit, then you just might also be crazy enough to enjoy the struggle while it lasts, and appreciate the eventual fruits of our labour, if you value privacy, freedom, and transparency. You might even make some money, and learn a bit from all the exceptional engineers working here.

# Who you are

You have strong Linux Fundamentals:
* Good understanding of process management
* Distros and package managers
* You have programming experience:

* At least a few languages and showing the ability to learn
* Bash as a minimum; Python would be helpful 

You have experience in Continuous Integration:
* Jenkins CI - Pipelines are written in Groovy
* GitHub Actions - PR builds, mostly

You have experience in Security:
* Good understanding of OpenSSH
* GnuPG for encryption of secrets and backups

Distributed Systems:
* Experience running Ethereum nodes
* Knowledge of Layer 2 scaling solutions

# Compensation

We are happy to pay in any mix of fiat/crypto.

Infrastructure Engineer (Blockchain)

Taiko Labs is at the forefront of blockchain innovation, developing the Taiko ZK Rollup, a Layer 2 solution that scales Ethereum by faithfully emulating its technical and non-technical characteristics. Our solution, an Ethereum-equivalent (Type 1) ZK Rollup with based (fully permissionless) sequencing, enhances the performance of Ethereum by supporting all EVM opcodes within a decentralized, permission-less, and secure Layer 2/3 framework.

Our team is rooted in a firm belief in the power and potential of zero-knowledge proofs (ZKPs). Comprising seasoned professionals who have been utilizing ZKPs since 2018, our team has the distinction of having built the first ZK-Rollup on Ethereum. As we continue to push boundaries and innovate, we are eager to augment our team with talented, driven individuals who align with our vision and are ready to make a significant contribution to the blockchain landscape.

We are looking for a Solutions Engineer to join our team and contribute to making Taiko the easiest Ethereum environment for developers to build on. You will be responsible for helping the ecosystem partners to integrate smoothly into Taiko, helping the BD team on technical conversations, and creating resources and initiatives to make their experience exceptional. You will also represent Taiko in different conferences around the world.

# About the role

* Bridge the gap between developers and business. Being able to communicate effectively to technical and non-technical audiences.
* Understand the needs of our ecosystem partners, helping them on integrations, solving technical questions and managing the relationship alongside the Partnerships team.
* Interface with developers to turn their feedback and frictions into product directions for the engineering team.
* Participate in conferences around the globe, representing Taiko on the ground and jumping on stage where needed.
* Organize and lead events, Hackatons, and other developer-focused programs.

# About you

* Strong understanding of Ethereum and its application ecosystem.
* Understanding of L2 scaling solutions and cryptographic primitives.
* Experience as a software engineer, or in a developer relations role, or existing integration within the Ethereum/solidity dev community.
* Willingness to work directly with partners. High people and communication skills is required.
* Willingness to travel to hackathons and other community events.
* Highly curious and always learning.
* A deep sense of ownership in your work, deriving joy from helping others.

# Benefits

The role is remote, offers competitive compensation (cash + equity), and an opportunity to help scale Ethereum - a technology and ecosystem that is changing the world.

# How to Apply

Want to join our mission of bringing Ethereum to the masses?

* Include the role's title in your subject line.
* Please send along links that best showcase the relevant things you've built and done.

Solutions Engineer

We are building Waku as a public good infrastructure. Waku is the messaging layer of Web3.

It is a decentralized, censorship-resistant, privacy-preserving communication network that enables anyone to send and receive messages without worrying about surveillance or deplatforming.

We are developing 3 open source implementations of Waku:

* Nwaku: the reference implementation and service node
* Js-waku: for the browser
* Go-waku: to integrate as a library in native applications

We are enabling Ethereum builders to create new projects with a fully decentralized architecture, think dApp to Wallet notifications, NFT marketplaces, censorship-resistant chat, layer-2 decentralization and more.

# Key responsibilities:

* Design, implement and document Waku nim libraries and node (nwaku)
* Collaborate and support the Research team with the implementation of new protocols
* Investigate and fix issues in nwaku and upstream libraries such as nim-libp2p
* Maintain an array of bindings and wrappers over the nim library to enable usage of Waku in other languages (Rust, NodeJS, Golang)
* Optimize nwaku and upstream libraries for usage on various environments (VPS, laptop, mobile, Raspberry Pi)
* Support dApp developers in using nwaku and other Waku libraries/bindings

# You ideally will have: 

* At least 2 years of experience in low-level or statically typed languages (C, C++, Rust or Go)
* Experience building applications with complex logic, cutting edge technology or applied research, including for network environments
* Ability to learn new concepts and technologies quickly; you are a polyglot
* You have a deep interest for blockchain and decentralized technologies and understand how they work

# Bonus points: 

* You are already familiar with the Ethereum community or you are in Web3 or blockchain development
* You have experience with any libp2p implementations
* You have experience with maintaining bindings, especially in a mobile or embedded context
* You have experience working for a remote only open source organization

# Hiring process:

+ Intro call with PeopleOps (30 minutes)
+ Interview (technical) with nwaku team member (1h)
+ Pair programming session with a nwaku team member (1h)
+ Final interview with Waku Lead (45minutes to 1h)

# Compensation:

The expected compensation for this role is up to $100,000 (negotiable, dependent on how we assess your skills and experience throughout our interview process). We are happy to pay in any mix of fiat/crypto.

Protocol Engineer

We’re like-minded, curious, excitable people here at Chiliz who work well in teams, spread across the globe. Chiliz is a global blockchain company, which powers Socios.com - the creators of Fan Tokens, and the popular fan rewards platform.

Socios has partnered with some of the world’s best teams, including Paris Saint-Germain, Juventus, FC Barcelona, Atlético de Madrid, UFC, Galatasaray, Manchester City FC, Davis Cup, and many more.

The curious nature of a Chilizen is what drives this company forward, and since we’re looking to grow even more, apply for your dream role today.

# OUR BRANDS & CHANNELS

We are building the web3 infrastructure for sports & entertainment!

Founded in 2018, Chiliz is a blockchain provider focused on the sports and entertainment industry. We build scalable, secure blockchain-enabled solutions that supercharge fan experiences using digital assets. 

$CHZ is the native digital token for the Chiliz sports & entertainment ecosystem currently powering Socios.com and the Chiliz Chain blockchain. 

Socios.com is a fan engagement and rewards app that allows fans to engage with their favourite teams and clubs through digital assets known as Fan Tokens.

# THE ROLE

Due to continued growth, we are looking to recruit a Web3 Engineer to join our team of talented developers that share a common interest in distributed systems, their scalability, and continued development.  You will be part of the team responsible for building the Chiliz chain that powers Socios platform. 

This role is available for all qualified candidates based in Europe. Remote working arrangements will be provided either based on a Full-time employment contract or consultancy agreement depending on the tax residency within the EU.

# Duties & Responsibilities:

* Building Web3 interfaces that are directly interacting with the blockchain
* Mentor and guide other engineers in advancing their skills and knowledge in Blockchain development.
* Maintain and improve existing products
* Work closely with engineers and product managers on new features
* Ensure code quality through tests, in accordance with good practices
* Participate in code reviews
* Anticipate scalability and performance issues
* Be a force of technical and functional proposals

# Requirements:

* Good knowledge of Solidity and experience with smart contract development.
* Strong communication skills, including the ability to mentor and effectively convey complex technical concepts.
* Must have a good understanding of blockchain technology, including how it works, its advantages and disadvantages, and the various types of blockchain networks available (L1s, L2s, rollups, …).
* Proficiency with any Web3 library eg. Web3.js or ether.js or similar.
* Should be familiar with the Web3 stack, which includes tools like Metamask, Remix, Hardhat, Foundry or similar.
* Experience working with JavaScript, NodeJS and React.js or similar frameworks/libraries.
* Should have a good understanding of cryptography concepts such as public and private keys, encryption, and digital signatures.

## Good to have:

Experience with Golang or Rust 
Understanding of governance and consensus models: familiarity with different consensus mechanisms like Proof of Stake, Proof of Work, and Delegated Proof of Stake.

# WHAT WE OFFER

We offer you the chance to grow, to learn, to flex your creative muscles, and to work on a project that is providing excitement to millions of users.

During our interview process, you can ask us anything and get to know your team too. We need this to work both ways: It's not just about you fitting in, but about us being the right fit for you too.

Are you ready to work with the world’s best sports teams? Are you happy to try, fail, and try again? Are you excited to keep pushing the boundaries of technology? 

We’ve got offices across the world, over 30 nationalities in our ranks and the most important superpower of all - flexibility. Our competitive salaries, wellness allowance, healthcare and pension plan are just the tip of the iceberg. You’ll gain friends, experience and a good challenge, we’ll gain you. 