\nSenior Back End Developer (Java/Kotlin) - Protocol Team at Rarible\n\n\n🌍 Shape the Web 3 Future with Rarible\n\n\nThe decentralized power of Web 3 holds immense promise, but to truly harness its potential, we need the right minds and the right tools. At Rarible, our protocol offers top-notch infrastructure and tools, as we aim to foster a digital space that benefits communities across the globe.\n\n\n🛠 Role Overview\n\n\nAs a Senior Back End Developer on our Protocol Team, you'll be diving deep into the intricacies of the Rarible Protocol — our tailored toolkit designed for web3 developers. This protocol empowers them to establish rich NFT applications, safely trade NFTs, and pull consistent and full data about NFTs. \n\n\nYour expertise will be channeled into developing backend services, drawing state information from blockchain and other sources, and integrating it seamlessly into our internal database. Ensuring data reliability and consistency will be a pivotal challenge.\n\n\n\n\n\n💼 Your Responsibilities:\n* Craft & Code: Design and develop the core Protocol service components.\n* Automate: Implement automated tests to ensure alignment with business objectives and provide room for regression testing.\n* Optimize: Oversee and enhance the performance of current systems.\n* Vigilance: Monitor systems, troubleshoot anomalies, and ensure seamless functionality.\n* Champion Best Practices: Advocate for top-tier technology and software development practices.\n* Review: Regularly conduct code reviews, ensuring quality and best practices are at the forefront.\n\n\n\n🔧 Skills We Admire:\n* Microservices Mastery: An in-depth understanding of Microservices architecture.\n* Spring in Your Step: Proficiency in Spring for constructing microservices.\n* Tech Toolkit: Hands-on experience with MongoDB, Kafka, and Redis.\n* Startup Success: Previous work experience in fast-paced, remote, and globally distributed startup environments.\n\n\n\nPerks:\n* Full-time role with a hybrid Hub policy in sunny Lisbon, Portugal\n* Relocation packages available\n* Unlimited paid days off policy to own your own R&R\n* Stock options and RARI Token grants\n* Hardware and software support\n* Tuition reimbursement program to support your professional development\n\n\nWe are passionate about what we do and care deeply about our product. We are committed to creating a culture of learning and growth, where our team members can thrive. If you are interested in joining us on this mission, we would love to see you on-board!\n\n\n\n\n\n \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Design, Web3, Senior, Engineer and Backend jobs that are similar:\n\n $70,000 — $105,000/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n
\n\n#Location\nRemote - Lisbon/EU

\nWhat is Polygon Labs?\n\n\nPolygon Labs develops Ethereum scaling solutions for Polygon protocols. Polygon Labs engages with other ecosystem developers to help make available scalable, affordable, secure and sustainable blockchain infrastructure for Web3. Polygon Labs has initially developed a growing suite of protocols for developers to gain easy access to major scaling solutions, including layer 2s (zero-knowledge rollups and optimistic rollups), sidechains, hybrid chains, app-specific chains, enterprise chains, and data availability protocols. Scaling solutions that Polygon Labs initially developed have seen widespread adoption with tens of thousands of decentralized apps, unique addresses exceeding 225 million, over 1.2 million smart contracts created and 2.56 billion total transactions processed since inception. The existing Polygon network is home for some of the biggest Web3 projects, such as Aave, Uniswap, and OpenSea, and well-known enterprises, including Robinhood, Stripe and Adobe. Polygon Labs is carbon neutral with the goal of leading Web3 in becoming carbon negative.\n\n\nAbout the job:\n\n\nThe digital landscape continues to evolve at a rapid pace, and Polygon Labs remains on the cutting edge with innovative Ethereum scaling solutions, developer tools and user applications. We’re looking for a skilled Software Engineer - Backend to join our team of creators consistently raising the bar on developer, as well as user experiences. Working behind the scenes on the Developer Studio Engineering team, the ideal candidate has a unique blend of technical expertise and insatiable curiosity, with a methodical, analytical mindset. You should be comfortable working alongside a team as well as independently in the design and development of mission-critical web3 services, applications, and layers of the infrastructure. Our back end developers have an immediate effect on our business success, as well as the success of our clients.\n\n\n\nRoles and responsibilities:\n* Minimum 2 years of experience with backend development and at least 1 year of web3 experience.\n* Regularly communicate with stakeholders, project managers, quality assurance teams, and other developers regarding progress on the long-term technology roadmap\n* Produce secure and quality code, adhering to clean code principles and writing unit tests, raising the bar for the whole team on quality and speed\n* Build prototypes, solve issues, profile and analyze bottlenecks\n* Design and maintain scalable web3 applications and supporting infrastructure like chain data indexers, staking platforms, multi chain bridges etc.\n* Develop robust REST and GraphQL APIs to support developers and high traffic frontend applications\n* Manage and optimize scalable SQL and NoSQL databases\n* Develop automated tests to ensure business needs are met and allow for regression testing\n\n\n\nSkills required:\n* Computer science degree and equivalent experience\n* Experience in Web3 space and developing applications on EVM compatible chains is as must\n* Excellent foundation in computer science, algorithms, and software design\n* Experience writing highly secure NodeJS applications\n* Experience designing REST and GraphQL APIs\n* Experience with Event Driven architecture and Microservice architecture patterns\n* Experience with Jest testing framework\n* Languages and Tools: JavaScript, TypeScript, NodeJS, Web3js, Ethers, Jest, EVM node JSON RPC, Docker, Git and MongoDB\n* Growth mindset, challenging status quo to find new solutions and out-of-the-box ideas\n* Experience with core AWS technologies\n\n\n\nOfferings:\n* Agile working environment with flexible working hours and location, career advancement, and competitive compensation package.\n* A good work environment with competitive benefits and holidays.\n* We’re a lean team with a flat hierarchy, so your impact will be felt immediately.\n* Crypto native colleagues who want to change the world!\n\nFeel free to share relevant links for - Writings, GitHub link, Mockups, Portfolio, or anything which can give us a clear idea of your work quality and passion.Let’s build pipes for the Web3 future together! 🚀\n\n\n\nPolygon Labs Perks\n\n\nThe goal of the Polygon Labs total rewards program is to support the health and well-being of you and your family. Our comprehensive compensation plan includes, the following benefits:\n\n\nRemote first global workforce\nIndustry leading Medical, Dental and Vision health insurance fully covered for each employee*\nCompany matching 401k with 6% match*\n$1,500 Home Office Set Up Allowance (life-time max)\n$2,000 Annual Employee Development Program\n$200 Annual Book Allowance Program \n$75/ Month internet or phone reimbursement* \nUnlimited Time Off\n1 company wide wellness Friday day off per quarter\nCompany issued laptop\nEmployee Assistance Programs\n\n\n*In certain countries medical, dental and vision is fully covered for any dependents. This is country and plan specific.\n*401k & Monthly internet/phone reimbursement is for United States Employees only\n\n\nPolygon Labs is committed to a diverse and inclusive workplace and is an equal opportunity employer. We do not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.\nIf you think you have what it takes, but don't necessarily meet every single point on the job description, please still get in touch. We'd love to have a chat and see if you could be a great fit.\n\n\nLearn More about Polygon Labs\n\n\nWebsite | Twitter | Developer Twitter | Telegram | Reddit | Discord | Instagram | Facebook | LinkedIn\n\n \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Web3, Design, Ethereum, GraphQL, Testing, NoSQL, Git, Node, Engineer, Backend and Digital Nomad jobs that are similar:\n\n $60,000 — $120,000/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n
\n\n#Location\nBengaluru

\nWho We Are\n\n\nSubspace Network is building a radically decentralized, next-generation blockchain which allows developers to easily run Web3 apps at Internet scale. Subspace is based on original research funded by the US National Science Foundation and plans to launch its Network later this year. Subspace Labs is an early-stage, venture-backed startup with a remote-first, globally distributed team. To learn more, visit our website, view our team handbook, and read the technical whitepaper.\n\n\nWe are seeking a Lead Full-Stack Engineer to complement our product engineering team. Responsibilities include facilitating the engineering management process across our product application teams in addition to contributing to several user-facing apps (wallet, block explorer, CLI, desktop app), integrating with other blockchain networks and decentralized protocols, maintaining a developer SDK, and building decentralized apps that demonstrate the potential of the Subspace Network.\n\n\n\nIn this role you will: \n* Collaborate directly with the Head of Product to translate our product roadmap into actionable engineering implementation plans.\n* Identify the key tasks and critical path, anticipating potential roadblocks.\n* Build user flows across both web and backend (React and Node).\n* Integrate directly with other blockchain networks using native RPCs.\n* Drive detailed project definition and cross-functional alignment.\n* Design and architect backend REST and/or GraphQL APIs.\n\n\n\nKey Requirements:\n* 5+ years of experience building open-source code that is clean, maintainable, and well-tested, for production networks at scale.\n* 2+ years of experience leading engineering teams in blockchain, crypto, or Web3.\n* 2 + years of experience working with Typescript and Node.js.\n* 2+ years of experience of experience with Ethers/Web3.js or Polkadot.js.\n* 2 + years of experience working with React.js and Node.js.\n* Theoretical knowledge of blockchains and distributed systems.\n* Experience working with container technologies like Docker.\n* A passion for decentralized, peer-to-peer systems and Web3 technologies.\n\n\n\nBonus Experience:\n* Experience with the Rust programming language.\n* Familiarity with Substrate and the Polkadot ecosystem.\n* Experience building developer SDKs and internal tools.\n* Experience writing smart contracts in Solidity or similar language.\n* Experience working with the Tauri desktop application framework.\n\n\n\n What We Offer:\n* Work remotely from anywhere in the world with a talented team of globally distributed individuals.  \n* A competitive salary with generous equity and token grants.\n* Medical, dental, and vision insurance (US based only). \n* A unique opportunity to shape the future of the Subspace Network and play a critical role in building the world’s most scalable blockchain.\n* Company-sponsored team offsites in various locations around the world.\n\n\n\n\n \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to Web3, Solidity, GraphQL, Typescript, Engineer, Backend and Digital Nomad jobs that are similar:\n\n $70,000 — $120,000/year\n
\n\n#Benefits\n 💰 401(k)\n\n🌎 Distributed team\n\n⏰ Async\n\n🤓 Vision insurance\n\n🦷 Dental insurance\n\n🚑 Medical insurance\n\n🏖 Unlimited vacation\n\n🏖 Paid time off\n\n📆 4 day workweek\n\n💰 401k matching\n\n🏔 Company retreats\n\n🏬 Coworking budget\n\n📚 Learning budget\n\n💪 Free gym membership\n\n🧘 Mental wellness budget\n\n🖥 Home office budget\n\n🥧 Pay in crypto\n\n🥸 Pseudonymous\n\n💰 Profit sharing\n\n💰 Equity compensation\n\n⬜️ No whiteboard interview\n\n👀 No monitoring system\n\n🚫 No politics at work\n\n🎅 We hire old (and young)\n\n
\n\n#Location\nInternational