Senior Backend Architect - Java

About the Role: 
We’re looking for an experienced Smart Contract Developer to join our remote team. You’ll be responsible for designing, developing, and deploying secure and efficient smart contracts for blockchain-based applications. The role involves close collaboration with other developers and product leads to bring new ideas to life. 
 
Key Responsibilities: 
- Design, write, and test smart contracts (Solidity)
- Review and optimize existing contracts for gas efficiency and security
- Integrate contracts with front-end or backend services via Web3
- Participate in code reviews, audits, and documentation
- Stay current with blockchain trends and best practices
 
Requirements: 
- Proven experience with Solidity, EVM-based blockchains, and related frameworks (Hardhat, Truffle, Foundry, etc.) 
- Good understanding of DeFi protocols, NFT standards (ERC-721/1155), or Layer-2 solutions
- Familiarity with smart contract security and testing methodologies
- Experience using GitLab, Git, and version control workflows
- Ability to work independently and communicate effectively in English
 
Nice to Have: 
- Background in cryptography, auditing, or backend development
- Contributions to open-source blockchain projects
 
What We Offer: 
- Fully remote and flexible working hours (team across EST, CET, GMT+2)
- Flexible payment options — including crypto payments (USDT, USDC) or traditional methods
- Collaborative and friendly international team 
- Opportunities to grow into lead or architecture roles

BitPay, Inc., founded in 2011, is the world’s leading blockchain (cryptocurrency) payments company. We serve top merchants across six continents, providing a seamless and secure cryptocurrency payments experience. BitPay builds powerful tools to accept, store, and spend cryptocurrency safely and efficiently.
We’re looking for a Senior Backend Software Developer to join our remote US-based team and help craft the next generation of innovative products. If you thrive on solving complex problems, building scalable systems, and staying ahead of technology trends, this role is for you.
What You’ll Do:
Develop scalable and maintainable backend systems using Node.js and MongoDB
Collaborate with cross-functional teams to build features for customers and internal tools
Ensure high code quality through unit, integration, and functional testing, code reviews, and thorough documentation
Address challenges in scalability, reliability, and logging during development
Mentor and guide other developers, fostering growth and knowledge-sharing
Stay up-to-date with emerging technologies to keep our team innovative and competitive 
What We’re Looking For:
5+ years of professional backend development experience
Expert in Node.js and MongoDB
Proven experience delivering production-ready APIs
Strong desire for continuous learning and process improvement
Track record of delivering high-quality software in professional environments
Passion for your craft, drive for progress, and commitment to excellence
Portfolio showcasing your work (e.g., GitHub)
Blockchain or fintech development experience
Highly Preferred: blockchain or fintech development experience
Bachelor’s degree in Computer Science or equivalent experience with notable projects
What We Offer:
Collaborate with a team of intelligent, enthusiastic individuals.
Thrive in a rapidly expanding crypto company with global reach, where your contributions make a tangible impact.
Work remote with a generous vacation policy, including the opportunity to take a sabbatical and select your own holidays.
Access to continuous learning and development opportunities, supported by professional development reimbursement.
Competitive salary package with comprehensive benefits, including fully covered medical and dental plans. We also offer telemedicine, life insurance, disability insurance, vision coverage, 401k, travel assistance, and more.
Option to receive payment in cryptocurrency, along with a crypto match program.
Stock option awards available to all employees.
Home office allowance, reimbursement for internet/cell expenses, complimentary Amazon Prime and Spotify subscriptions.
BitPay is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
If interested, please apply here: https://bitpay.applytojob.com/apply/jobs/details/4eZJqEucfX

About Dredsoft LabsAt Dredsoft Labs, we are building the next generation of decentralized applications and digital ecosystems. Our mission is to bridge innovative Web3 technologies with real-world usability—empowering users, creators, and businesses through transparent, secure, and scalable blockchain solutions.We’re a team of passionate engineers, designers, and thinkers shaping the future of decentralized technology. If you thrive at the intersection of blockchain, design, and user experience, Dredsoft Labs is the place for you.We are seeking a Web3 Frontend Engineer to design, develop, and maintain cutting-edge decentralized applications (dApps) and user interfaces that interact with blockchain networks. You’ll collaborate closely with blockchain developers, product designers, and backend engineers to deliver seamless, secure, and scalable user experiences in the Web3 ecosystem.Key ResponsibilitiesDevelop responsive, performant, and intuitive user interfaces for dApps and Web3 platforms.Integrate blockchain functionality using libraries such as ethers.js, web3.js, or wagmi.Collaborate with smart contract developers to build and test on-chain/off-chain interactions.Implement wallet connections (e.g., MetaMask, WalletConnect, Coinbase Wallet).Work with modern frontend frameworks such as React, Next.js, or Vue.js.Ensure high-quality code through unit testing, code reviews, and continuous integration.Optimize UI/UX for blockchain-specific challenges like transaction feedback, gas estimation, and asynchronous confirmations.Stay current with Web3 trends, tooling, and emerging technologies in the blockchain ecosystem.Required QualificationsBachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).3+ years of professional experience in frontend development.Proficiency in JavaScript, TypeScript, React, and modern web technologies (HTML5, CSS3, REST APIs).Strong understanding of Ethereum, EVM-compatible chains, and blockchain fundamentals.Experience with ethers.js, web3.js, wagmi, or similar libraries.Familiarity with decentralized storage solutions (e.g., IPFS, Arweave).Experience integrating Web3 wallets and signing transactions.Soft SkillsStrong problem-solving and debugging skills.Passion for decentralized technologies and blockchain innovation.Excellent communication and collaboration skills.Ability to thrive in a fast-paced, evolving tech landscape.What We OfferCompetitive compensation (salary + token/equity options).Flexible remote work environment.Opportunity to work on high-impact blockchain projects.Access to developer conferences, learning stipends, and mentorship.

BingX is a leading cryptocurrency exchange, serving over 20 million users worldwide. Responsibilities: We’re looking for a marketing and PR professional to localize brand strategy, content, and campaigns for a specific language region. Responsibilities include monitoring local market trends, aligning with HQ teams, creating culturally relevant PR content, supporting promotional launches, coordinating local events and logistics, managing client communications, and contributing to SEO, advertising, and workflow optimization. Requirements: experience in localization, marketing, or PR, with a strong understanding of local culture, media, and social platforms. Background in offline event execution and logistics is preferred. Must be skilled in PR writing, campaign optimization, and cross-team coordination. Proactive, detail-oriented, and capable of managing partnerships and business negotiations. Knowledge of the Spanish-speaking Web3 ecosystem is a plus. Fluency in English and Spanish is required; Chinese is a bonus.

My project is about building a USDT-like token (ERC20/TRC20/BEP20) with: Peer to Peer transfers & Trade Escrow-based trading Real liquidity (not flashed) Liquidity optimization (max tokens with minimum backing) Please share: Your past DeFi/Blockchain projects How you handle liquidity optimization