Fuel Labs is building the fastest modular execution layer in the world. You will be working at the bleeding edge of blockchain scalability R&D designing and building robust blockchain full node software powered by a next-generation virtual machine.

# Required Experience

* 5+ years of experience as a software engineer
* Strong proficiency in Rust, C++, or Golang (or other systems language)
* Extensive knowledge of virtual machines or blockchain node software
* Experience developing or designing P2P distributed systems
* Native level proficiency in written and oral English
* Excellent communication skills
* Prior experience working remotely in a globally distributed team

# Bonus

* Experience with financial systems or other high security services
* Solidity/smart contract development
* Consuming and contributing to open source codebases
* Background in philosophy

Blockchain protocols

Rust

Remote

Senior Protocol Engineer

Aurora Labs is the development company behind Aurora—the EVM blockchain that runs on the NEAR Protocol. We are also the developers of, and integration partner behind, Aurora Cloud—a suite of products that allow Web2 companies to capture the value of Web3.

We invite you to be a part of our team of smart, professional, result-oriented and fun individuals. Join us to help ensure that our business is blooming while we are striving to deliver the best solutions in the crypto world.

We at Aurora Labs are looking to hire a Blockchain/Contracts Developer to work on smart contracts for our Product, Engine and Contracts teams. This is a full-time position that can be done remotely anywhere in the world.

If you are eager to dive into the competing cross-chain ecosystem and would like to work in an energetic environment, surrounded by highly productive and meticulous engineers, we would be happy to see you in Aurora labs!

# Requirements

* Strong knowledge of Solidity.
* Experience with Ethereum ecosystem, smart contract development life cycle and Ethereum development tools (e.g. Open Zeppelin, ethers.js, Hardhat, Truffle).
* Familiar with indexing protocols (ThGraph, Covalent).
* Experienced in DevOps and CI/CD, and deployment systems.
* Experienced in one of version control systems (e.g git).
* Previous experience in the blockchain industry, particularly around the NEAR, Ethereum, Binance Smart Chain, or Solana ecosystems.
* Prior experience deploying and configuring complex smart contract systems to the Ethereum mainnet.
* Extreme ownership mentality - ability to take extreme ownership and full responsibility of tasks and projects.
* Fast learner with a natural curiosity.
* Passionate about blockchain technology.
* Professionalism and quality in work ethic.

# Responsibilities

* Contribute high quality and well-tested Solidity code, including smart contract development.
* Reviewing and auditing (internally) developed smart contracts by other teams.
* Implementing and executing comprehensive unit, integration and fuzzy testing.
* Contributing to the requirements drafting / analysis.
* Assisting in maintaining the product's CI/CD pipeline.
* Communication and collaboration with a fully distributed team.
* Collaborate with Ethereum and being active in the Ethereum engineering forums.

Blockchain Contracts Developer

Shardeum is building a layer 1, EVM-based, linearly scalable, smart contract platform that provides low gas fees forever while maintaining true decentralization and solid security through dynamic state sharding. Shardeum aims to be a chain capable of onboarding over a billion people to the crypto revolution, while also democratizing accessibility to decentralization.

Shardeum’s mission is supported by prominent Venture Capitalists in the blockchain space, and we are on track to become one of the most widely used and well known smart contract platforms in blockchain history.

We encourage you to browse our website, Litepaper, Discord and YouTube channel to learn more about the project. You can even try downloading our validator software and joining our Testnet.

We encourage people of all backgrounds and experience levels to apply. Your talent and potential is what matters most to us. Shardeum is committed to creating an inclusive culture.

# About The Role:

The Security Engineering team at Shardeum is responsible for delivering the Shardeum Mainnet safely and securely, and furthering the development of the smart contract platform, the consensus layer and the protocol layer. We focus on building scalable, performant, secure and reliable software that can be downloaded by thousands of node operators to actualize the Shardeum network.

We are in search of highly talented, innovative individuals to join our team. If you enjoy solving complex computer science problems, are passionate about what you work on, are a perfectionist who wants to build things the right way - the secure way - and are persistent about finishing what you started, then you're the kind of person we are looking for. You will be working with equally talented and innovative individuals with the goal of building incredible software with the potential to change the world.

# What You'll Be Doing:

* Perform proactive assessments covering infrastructure, secure and resilient architecture, data security (including privacy), identity and access management, application and product security
* Be proactive in identifying potential security flaws in code, designs, and processes, and develop strategies and tactics to resolve and mitigate exposed issues
* NodeJS and TypeScript Code Audit: Conduct security audits on code, discover and address potential security vulnerabilities
* Aid in planning organizational security priorities
* Evaluate application architectures for security related concerns, and consult on mitigation options.
* Develop on-chain security strategies and perform security assessments and threat modeling of various blockchain protocols and smart contracts
* Develop security-related activities in the software engineering process (e.g., threat modeling, secure coding practices)
* Design and develop detection capabilities to detect known/unknown hacks in Web3
* Triage vulnerability reports, work with engineering team to develop fixes
* Prioritize and drive the reduction of discovered security issues, vulnerabilities, and risks
* Development and/or use of Security-Related Tools
* NodeJS and TypeScript Code Analysis: Develop and/or use analysis tools for automatic detection of potential security vulnerabilities
* On-chain Incidents Monitoring: Develop and maintain strategies for detecting on-chain attacks, enabling real-time observation and reporting of potential security events

# What We're Looking For:

* BS/MS in Computer Science or related fields with security research experience
* Experience performing security architecture and design reviews
* Application Fuzzing and auditing experience
* Experience with Web3 security research a plus
* Good communication skills
* Knowledge of common vulnerabilities in different types of software and programming languages, including:
* How to test for/exploit them
* Real world mitigations that can be applied
* Familiarity with vulnerability classification frameworks (e.g., OWASP Top 10)
* Ability to threat model systems/applications/platforms to assess design and find flaws that can be exploited

# We'd Love If You Have:

* Experience with concurrency, parallelism and distributed systems
* Familiarity with the Shardeum / Shardus open source repos 
* Experience with consensus protocols and other blockchains
* Experience with Node.js and TypeScript, or languages like C, C++, Rust or Go
* Experience writing a smart contract on a blockchain
* Experience running a node in a blockchain network
* Knowledge of cryptography
* Experience with networks and operating systems
* Graduated with high academic scores or with honors
* Won or placed in a hackathon(s)
* Ranked highly on competitive coding sites
* Contributed to open source projects
* Written articles or created videos on technical topics, especially related to blockchain
* Read the Bitcoin and Ethereum whitepapers
* Done something extraordinary

# Here’s What Our Interview Process Looks Like:

Depending on calendar availability, from the first stage to the final stage, we do our best to keep the entire process to under two weeks. Our interviews take place via video calls and typically consists of the following stages:

* Internal Recruiter Call (30 to 45 minutes)
* Meet with the Hiring Manager (1 hour)
* Technical Tests (1-3 x 1-2 hours) 
* Culture & Values Interview (1 hour)

Security Engineer Blockchain

Evmos is on a mission to develop and ship the foundational tools necessary for building the cross-chain applications of the future, freeing developers from the confines of today’s siloed blockchains. Our teams are building for a world where the next million Web3 users are simply regular users. Read our latest manifesto here.

Evmos opens a new frontier for blockchain applications, expanding the functionality of the EVM by enabling cross-chain applications that tap the liquidity and user bases of multiple blockchain ecosystems to provide more unified experiences.

This is an opportunity to join Evmos at a pivotal time on our growth journey. Having just raised $27m in funding from investors including Polychain Capital, Coinbase Ventures and Circle Ventures, Evmos is now poised to accelerate towards our goal of becoming the playground for Ethereum Apps in the Cosmos ecosystem.

# About The Role:

* As our Blockchain Infrastructure Engineer, you will play a vital role within our dedicated DevOps team, defining and implementing strategies to manage and optimise our infrastructure.
* Your hands-on expertise will allow you to implement system infrastructure best practices and create essential guidelines for our developer community. You will also be tasked with constructing automated tools and workflows to bolster our validator community, node partners, and core engineering team.
* This role is a perfect match for someone with solid experience in both DevOps and software development, looking to leverage their skills in a challenging yet rewarding environment.
* As part of our team, you'll have the unique opportunity to collaborate with other engineering teams and engage with projects within the wider ecosystem like IBC, Cosmos, and Tendermint Core teams.

# What You Will Gain:

* Engaging with us provides you with the unique opportunity to deepen your understanding of blockchain technologies. You will delve into the intricacies of smart contracts, utilizing EVM and go-ethereum (Geth), and learn to implement app chains using the Cosmos SDK framework and the Tendermint Consensus Engine.
* Our team, pioneers in teaching the first university-level Blockchain for Developers course at UC Berkeley, are perfectly poised to guide you through this journey. In this role, you will further expand your professional expertise in cutting-edge blockchain technologies and its related fields, such as economics, mathematics, cryptography, and distributed systems.
* This is not just a job, but an opportunity to grow, continually learn, and actively contribute to the exciting and rapidly evolving field of blockchain technology. Your existing skills will be valued and expanded upon, creating a trajectory for professional development that is as unique as it is rewarding.

# Responsibilities:

* Manage the company’s validator node operations across various testnets and mainnets while adhering to internal SLAs and committed KPIs
* Coordinate client upgrades, hard forks, and emergency responses to failures
* Specify, procure, and set up the environment and infrastructure for validator nodes, including monitoring, logging, reporting, and alerting systems
* Design and implement procedures related to validator node operations, such as incident response, key management, change management
* Work closely with the business operations team to align technical operations with business goals
* Establish and refine processes to maximize the value derived from validator operations and minimize loss risks
* Provide training and guidance for other members of the infrastructure team, ensuring round-the-clock node operation
* Document and communicate technical details via open-source documentation
* Collaborate with various internal teams and the wider community to tap into new trends and opportunities highlighted by internal data, blockchain research, and the wider blockchain industry

# Requirements:

* Demonstrated proficiency in English, both written and verbal
* Must be Europe-based - strong preference for Berlin-based candidates
* Minimum of 3 years of experience in a similar role or as a Site Reliability Engineer (SRE)
* Solid expertise in at least one programming language
* In-depth knowledge of blockchain technology and smart contracts
* Experience in managing validator nodes across several testnets and mainnets
* Proven track record of specifying, procuring, and setting up environments and infrastructures for validator nodes
* Demonstrable experience with modern Infrastructure as Code (IaC) tools
* Proven experience with writing and managing configuration manifests
* Expertise in designing and implementing processes related to validator node operations
* Strong understanding of SLAs and KPIs
* Excellent problem-solving skills with the ability to coordinate hard forks and handle emergency responses to failures
* Excellent communication skills with the ability to document and convey technical details clearly
* Experience in training and guiding teams
* Proven history of contributions to open-source projects, excluding minor changes such as README file updates
* Understanding of Byzantine Fault Tolerance (BFT) and Proof of Stake (PoS) blockchains

# Nice to Haves:

* Experience with managing and optimizing performance for bare-metal nodes
* Understanding of modern IT security trends
* Experience in automating routine tasks and processes

Blockchain Infrastructure Engineer

Sismo leverages zero-knowledge proofs (ZKPs) to enable users to aggregate and selectively disclose personal data to apps. Our core product, , is an easy-to-integrate single sign-on (SSO) that allows apps to safely access previously unreachable data. Developers can showcase apps built with Sismo Connect on the .

Founded in 2021 with backing from over 130 of the biggest names in crypto, Sismo operates at the forefront of digital identity, web3 social, and zero-knowledge technology.

Our mission is to equip developers with the tools they need to empower users and unlock their social capital. We're dedicated to the developer community, providing support through easy-to-use libraries to help build the next generation of apps. Sismo was recognized in 2022 when we were featured in Vitalik Buterin’s list of .

When you join Sismo, you'll be part of a crypto-native team driven by a passion for privacy, decentralization, and next-gen technology. Team members are exposed to the best training, conferences, and hackathons the space has to offer. Be part of the future with Sismo.

# Role

As Sismo’s Smart Contract Engineer, you will work on the newest versions of our smart contracts and ZK circuits. In addition, you will maintain Sismo’s Solidity libraries for developers to integrate Sismo.

# Requirements

* 3+ years of experience in software engineering
* 1+ year(s) of experience building and maintaining open-source smart contracts deployed in production
* Experience building with Foundry, Tenderly, and other advanced smart contract development tools
* Experience or strong interest in learning ZK programming languages such as Circom or Noir
* Fluent in English (French is a bonus)

# Nice to have

* Background in mathematics, physics or cryptography
* Interest in web3 social

# Benefits

* Strong incentives (market salary + tokens)
* Remote-friendly
* Participation in some of crypto’s biggest events and conferences
* Become entrenched in the ZK community

Smart Contract Engineer

As a Blockchain Consensus Engineer in the MainNet Team at LUKSO, you'll be working on the core tech of a Layer 1 Blockchain: the consensus layer which is based on the ETH2 Proof of Stake Consensus. You will do so by developing and maintaining network protocols, consensus algorithms and latest achievements in sharding research. You will be surrounded by an experienced team of professionals and learn in a very quick pace to become an expert in the area.

LUKSO is focused on bringing blockchain technology to its next frontier with new tools and standards that will revolutionise the way the world interacts with blockchain. Creators and users will be able to have a seamless Web3 experience with LUKSO's future-proof solutions and we welcome talent around the world to join us in building the most innovative tools for the New Creative Economy.

LUKSO was Co-Founded by Chief Blockchain Architect, Fabian Vogelsteller, author of ERC-20, ERC-725, Web3.js, Mist Browser and former Lead Dapp developer of Ethereum and Marjorie Hernandez, an early blockchain strategist working with Ethereum, IOTA Foundation and world-renowned brands, who also Co-Founded THE DEMATERIALISED.

LUKSO is now being developed by 60+ people around the globe and we are looking for motivated and passionate people who are up to the task of joining us in building out the foundation for the New Creative Economy and the apps that power it.

# In one year you’ll know you were successful if you’ve

* Helped to construct and improve the LUKSO Blockchain consensus (long-term).
* Worked alongside the Ethereum consensus community and help improve the Casper consensus and sharding proposals for the LUKSO Blockchain and the wider Ethereum ecosystem.
* Built relationships with partnering teams, product managers, founders and designers, resulting in better collaboration, aligned roadmaps and confidence.
* Kept on top of Eth2 Development, with proposed hardforks by Ethereum, to ensure our network is fully up-to-date.

# A background like this helps:

* Professional experience and expert knowledge about Blockchain Consensus with Eth1/Eth2 particularly its current status and roadmap.
* Knowledge about Casper FFG Proof of Stake on EVM networks.
* Strong understanding of Blockchain Cryptography, Distributed Systems and Networks.
* Strong ability to communicate among a team of peers and to document your work well.
* Creative and adaptable mindset with the ability to develop solutions off the regular path.
* A demonstrated interest in cryptocurrencies/blockchain/web3 Technology, attending conferences or even being involved with DAOs, with a willingness and eagerness to learn on a daily basis.

# What We Offer:

* Innovation-driven working environment, where you’ll be part of a project that aims to set new standards in the industry and change the world we live in: doc.lukso.tech
* Team lunches and social activities
* Regular in-office health & sporting activities
* Collaborative squads and a flat structure, with a renowned team of industry experts
* Work fully remote CEST +/-6h or from our picturesque LUKSO office located next to the Spree river in Berlin, Germany