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<p>We're looking for a frontend developer to help build a cross-chain decentralized exchange (DEX) UI. The ideal person has 3–5+ years of experience with React, Next.js, and TypeScript, and has worked on Web3 apps before. They should be comfortable integrating wallets like MetaMask, WalletConnect, and Coinbase using libraries like Wagmi, RainbowKit, or Web3Modal. Strong knowledge of Ethers.js is key for handling Ethereum and EVM-based chains. </p><p>Bonus points if they’ve worked with Substrate/Polkadot.js, since the DEX backend is built on that stack. They should understand how wallet connections, signatures, RPCs, and chain switching work, and ideally be able to troubleshoot cross-chain quirks. Experience with decentralized protocols and privacy-focused coins like Monero or Bitcoin is a plus. </p><p>We want someone who writes clean, maintainable code, is security-conscious (especially around wallet/key handling), and can collaborate with backend and design teams. Experience with Tailwind or similar CSS frameworks is great. It’s a plus if they’ve built or contributed to crypto DEXs, trading UIs, or DeFi dashboards.</p><p>Reach out and we’ll brief you on the stack, scope, and product vision.</p>

Web3 Frontend Engineer - React/TypeScript

<p>EoT Labs and flagship project peaq were founded under the belief that a better trajectory for humanity exists. We’re focused on harnessing the power of modern technology to build a global, borderless, machine economy that works for all humans on earth – the 100%, not just the 1%.</p><p>Today, more than 20 industries are already being positively shaped by this next generation of apps built on the peaq network. This is an opportunity to join a team of performance-driven entrepreneurs, engineers, and creatives, on a mission to unlock the Age of Abundance.</p><p><strong>Key Responsibilities:</strong></p><ul><li>Design, develop, and maintain Web3 applications leveraging blockchain technologies.</li><li>Implement smart contracts for NFTs (ERC-721, ERC-1155), ERC-20 tokens, and DeFi protocols.</li><li>Develop and optimize backend services using PHP (Laravel), Node.js, and Python.</li><li>Build and integrate front-end applications using Next.js and React.</li><li>Work with the Polkadot ecosystem, including Substrate-based blockchains.</li><li>Collaborate with DevOps teams to ensure high availability and security of blockchain applications.</li><li>Stay updated with the latest trends in Web3, blockchain security, and smart contract development.</li></ul><p><strong>Qualifications & Requirements:</strong></p><ul><li>5+ years of experience in software development with a focus on Web3.</li><li>Strong knowledge of blockchain fundamentals, smart contracts, and cryptographic principles.</li><li>Proficiency in PHP (Laravel), Node.js, and Python.</li><li>Experience with Next.js for front-end development.</li><li>Expertise in Ethereum standards (ERC-20, ERC-721, ERC-1155) and NFT marketplace development.</li><li>Experience working with Polkadot and Substrate-based blockchains.</li><li>Strong understanding of API integrations, WebSockets, and event-driven architectures.</li><li>Experience with IPFS, decentralized storage, and smart contract security best practices.</li><li>Knowledge of cloud services such as AWS, GCP, or Azure.</li></ul>

Senior Software Engineer (Freelance)

Subspace Labs is an early-stage, venture-backed startup with a remote-first, globally distributed team. To learn more, visit our <a href="https://www.subspace.network/" rel="noopener noreferrer nofollow ugc" target="_blank">website</a>, view our <a href="https://subspacelabs.notion.site/Subspace-Labs-Team-Handbook-6806dc3dc33d4795869db79b061ab789" rel="noopener noreferrer nofollow ugc" target="_blank">team handbook</a>, and read the <a href="https://subspace.network/blog/subspace-network-whitepaper" rel="noopener noreferrer nofollow ugc" target="_blank">technical whitepaper</a>.We are seeking a Senior Full-Stack JS/TS Developer to complement our product engineering team. Responsibilities include contributing to several user-facing apps (wallet, block explorer, 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.<h3>In this role, you will...</h3><ul><ul><li><b>Build </b>user flows across both web and backend (React and Node).</li><li><b>Integrate</b> directly with other blockchain networks using native RPCs.</li><li><b>Collaborate</b> with Product, Design, and Engineering to define, prioritize, and build features for Web3 <a href="http://users.drive/" rel="noopener noreferrer nofollow ugc" target="_blank">users.</a></li><li><b>Drive </b>detailed project definition and cross-functional alignment.</li><li><b>Design </b>and architect backend REST and/or GraphQL APIs.</li></ul></ul><h3>Key Requirements:</h3><ul><ul><li>3+ years of experience building open-source code that is clean, maintainable, and well-tested, for production networks at scale.</li><li>2 + years of experience working with Typescript and Node.js</li><li>2+ years of experience of experience with Ethers/Web3.js or Polkadot.js.</li><li>2+ years of experience working with React.jsExperience working with container technologies like Docker.</li><li>A passion for decentralized, peer-to-peer systems and Web3 technologies.</li></ul></ul><h3>Bonus Points:</h3><ul><ul><li>Experience with the Rust programming language</li><li>Familiarity with Substrate and the Polkadot ecosystem</li><li>Experience building developer SDKs and internal tools.</li><li>Experience writing smart contracts in Solidity or similar language.</li><li>Theoretical knowledge of blockchains and distributed systems.</li></ul></ul><b>What We Offer</b>𐄁 The ability to work from anywhere in the world 𐄁 A competitive salary with generous equity and token grants 𐄁 Medical, dental, and vision insurance (US-based only) 𐄁 A unique opportunity to shape the future of the internet𐄁 Team off-sites in various locations around the globe

Product Engineer (Fullstack)

<p><a href="http://chainsafe.io/" rel="noopener noreferrer nofollow ugc" target="_blank">ChainSafe</a> is a leading blockchain research and development firm specializing in infrastructure solutions for the decentralized web. Alongside its contributions to significant ecosystems such as Ethereum, Polkadot, Filecoin, Mina, and more, ChainSafe creates solutions for developers and teams across the web3 space utilizing our expertise in <a href="https://buildwithsygma.com/" rel="noopener noreferrer nofollow ugc" target="_blank">bridging</a>, <a href="http://gaming.chainsafe.io/" rel="noopener noreferrer nofollow ugc" target="_blank">gaming</a>, NFTs, and <a href="http://storage.chainsafe.io/" rel="noopener noreferrer nofollow ugc" target="_blank">decentralized storage.</a> As part of the mission to build innovative products for users and better tooling for developers, ChainSafe embodies an open-source and community-oriented ethos.</p>
<p>To learn more about ChainSafe, look at our <a href="https://discord.com/invite/xSAwrnCWcg" rel="noopener noreferrer nofollow ugc" target="_blank">Discord</a>, <a href="https://github.com/chainsafe" rel="noopener noreferrer nofollow ugc" target="_blank">GitHub</a>, and <a href="https://chainsafe.io/projects" rel="noopener noreferrer nofollow ugc" target="_blank">website</a>.</p>
<p><strong>Here’s what you need to know before reading on:</strong></p>
<ul>
<li>Our progressive tech stack includes Go, Rust, and TypeScript</li>
<li>We spearhead ecosystem projects like <a href="https://github.com/ChainSafe/lodestar" rel="noopener noreferrer nofollow ugc" target="_blank">Lodestar</a>, <a href="https://github.com/ChainSafe/web3.js" rel="noopener noreferrer nofollow ugc" target="_blank">Web3.js</a>, <a href="https://github.com/ChainSafe/forest" rel="noopener noreferrer nofollow ugc" target="_blank">Forest</a>, <a href="https://github.com/ChainSafe/mina-rs" rel="noopener noreferrer nofollow ugc" target="_blank">Mina-rs</a>, and <a href="https://github.com/ChainSafe/gossamer" rel="noopener noreferrer nofollow ugc" target="_blank">Gossamer</a></li>
<li>We are global, remote-friendly, and open to contractors</li>
<li>You’ll form part of the Sygma Engineering team, our bridging protocol</li>
<li>At Sygma we believe that cross-chain interoperability is the fundamental enabler for the next wave of growth in the blockchain industry. Sygma will empower builders to create streamlined experiences where users are not confined to one ecosystem. By enabling elaborate cross-chain functionality and putting most of the steps under the hood, Sygma will enable smooth, web2-like user experiences. For more information about Sygma please visit <a href="http://buildwithsygma.com" rel="noopener noreferrer nofollow ugc" target="_blank">buildwithsygma.com</a></li>
</ul>
<p>At ChainSafe, you’ll be part of a team that believes in the community's vital importance and contributes to advancing humanity with open-source and decentralized technology.</p>
<h3>About the role</h3>
<p>As our Senior BlockOps engineer for Sygma, our cross-chain interoperability protocol, you will play a vital role in our dedicated BlockOps team, defining and implementing best-practice strategies and guides to manage and optimize our infrastructure.</p>
<p>The BlockOps team supports the critical systems, services, and tooling at the foundation of Sygma’s mission, to abstract away all the complexities of cross-chain interoperability to enable users to ‘deposit from anywhere’. We enable Sygma’s engineers to design, develop, and operate services quickly, safely, securely, and reliably. BlockOps teams build and maintain the platforms critical to the existence of Sygma.</p>
<p>Your expertise will undoubtedly contribute to the sophistication of blockchain applications and redefine the boundaries of what's possible within this emerging technological sphere. All work across Sygma will be open-source, ensuring expansive opportunities for deep contribution and collaborative efforts across various web3 blockchains and ecosystems.</p>
<h3>Responsibilities</h3>
<p><strong>What you will be doing</strong></p>
<ul>
<li>Ensure reliable operation of the company’s distributed Relayer nodes operations across various blockchain networks (EVM, Substrate, Cosmos SDK) while adhering to internal SLAs and committed KPIs</li>
<li>Design and implement procedures related to Sygma’s Relayer node operations (deployment and upgrade, incident response, and key management)</li>
<li>Build monitoring and observability for various Sygma services including a distributed set of relayers and various blockchain full nodes.</li>
<li>Provide training and guidance for other members of the infrastructure team, ensuring round-the-clock node operation and incident response.</li>
<li>Document and communicate technical details via open-source documentation</li>
<li>Collaborate with various internal teams and the wider community to build, expand, and scale Sygma’s architecture, by tapping into new trends and opportunities highlighted by internal data, blockchain research, and the wider blockchain ecosystem</li>
</ul>
<h3>Requirements</h3>
<ul>
<li>Solid dev. experience with Golang</li>
<li>Experience working with AWS services</li>
<li>Demonstrable experience with modern Infrastructure as Code (IaC) tools (Terraform, Helm, Ansible, etc), automating deployment, and best CI/CD practices and tools.</li>
<li>Experience with monitoring and alerting tools (DataDog, Grafana, Prometheus, etc.)</li>
<li>Experience implementing distributed tracing, monitoring, and logging systems using OpenTelemetry Protocol</li>
<li>Experience building and participating in incident response systems (PagerDuty, etc) and handling the emergency response to production environment failures.</li>
<li>In-depth knowledge of distributed systems and blockchain technology.</li>
<li>Excellent communication skills with the ability to document and convey technical details clearly</li>
<li>Ability to work autonomously as well as with the wider team</li>
</ul>
<h3>As a plus:</h3>
<ul>
<li>TypeScript, Solidity, or Rust is a big plus</li>
<li>Experience with specifying, procuring, and setting up infrastructures for Blockchain validator nodes, and managing them across several blockchain networks.</li>
<li>Experience automating network deployment and testing of SmartContracts with various tools (Truffle, HardHat, Foundry, Anvil)</li>
<li>Understanding at least two of the following domains - Web Security, Web3 Security, Cloud Security, Systems Security, and Applied Cryptography.</li>
</ul>
<h3><strong>Hiring Steps</strong></h3>
<ul>
<li>Selected candidates will be invited to a 30–to–45–minute screening call with one of our tech recruiters</li>
<li>Next, candidates will be invited to a 60-minute values interview with one of our team members</li>
<li>Technical 60-minute interview with one of our engineers</li>
<li>Then, candidates will be asked to complete a technical task in under 10-15 hours, but we provide up to 5 business days to complete it</li>
<li>After the completion of the test assignment call with Engineering team to discuss the results, for 60 minutes.</li>
<li>Lastly, candidates will be invited to a 60-minute interview with the hiring team members</li>
</ul>
<p><strong>Why Join ChainSafe</strong></p>
<p>Founded by developers for developers, ChainSafe is a remote-first company with an international team. We continue to provide opportunities for personal and professional growth, value autonomy and responsibility, have a results-driven environment, and offer flexible work hours.</p>
<p>We care deeply about <a href="https://chainsafe.io/corevalues" rel="noopener noreferrer nofollow ugc" target="_blank">our values</a> and look for these attributes in every new team member. In addition, we recognize the benefits of cultivating a diverse team and aspire to embed respect for all people into our culture. We encourage women, the LGBTQIA+ community, people of colour, and members of any other group underrepresented in the blockchain space (or tech in general) to apply.</p>
<p><strong>How to Apply</strong></p>
<p>Please fill out the Greenhouse application form below and ensure that you attach your resume and link your Github/Gitlab profile or any software project you have contributed to (if applicable).</p>




Senior BlockOps Engineer (Golang) - Sygma

We are seeking a core protocol engineer to help implement the Subspace Network, a radically decentralized, next-generation blockchain written in Rust, using the <a href="https://substrate.dev/" rel="noopener noreferrer nofollow ugc" target="_blank">Substrate</a> framework. Subspace employs a novel proof-of-storage consensus algorithm and a decoupled execution framework, which allows it to scale far beyond existing blockchains, without sacrificing security or decentralization. Subspace Labs is an early-stage, venture-backed startup with a globally distributed team. To learn more visit our <a href="https://subspace.network/" rel="noopener noreferrer nofollow ugc" target="_blank">website</a> and read the <a href="https://subspace.network/blog/subspace-network-whitepaper" rel="noopener noreferrer nofollow ugc" target="_blank">technical whitepaper</a>.<h3>Your Responsibilities</h3><ul><ul><li>Become a leading contributor and core maintainer of the Subspace Network</li><li>Implement a series of novel consensus, execution, and scalability proposals</li><li>Maintain the highest standards of distributed open-source software development including modular design, comprehensive testing, proper documentation, and responsive support.  </li></ul></ul><h3>Basic Requirements</h3><ul><ul><li>Experience with current blockchain technologies and landscape</li><li>Theoretical background in distributed systems, such as consensus algorithms, as well as cryptographic fundamentals</li><li>Strong knowledge of a modern systems programming language, such as Rust, C++, or Go and willing to learn Rust.</li><li>Experience working with large open-source codebases</li></ul></ul><h3>Nice to Have</h3><ul><ul><li>Familiarity with the Rust language and its ecosystem</li><li>Familiarity with Substrate and the Polkadot ecosystem</li><li>Experience implementing blockchain consensus protocols</li><li>A passion for decentralized, peer-to-peer systems and Web3 technologies</li></ul></ul><h3>Benefits</h3><ul><ul><li>A remote work environment with a high degree of autonomy and agency</li><li>You will play a critical role in implementing a new layer one blockchain</li><li>Salary and options befitting an early hire at a venture-backed startup</li></ul></ul>

Protocol Engineer (Core)

Internatsional'noye

Web3 Polkadot Substrate jobs and other crypto companies

Browse many opportunities Web3 Polkadot Substrate Jobs at. Apply now. updated June 2026!

Job Title	Company Name	Salary	Location	Tags
V Web3 Frontend Engineer - React/TypeScript	VostoEmisio	5k/month	Remote	DEXDeveloperWeb3Remote
Senior Software Engineer (Freelance)	EoT Labs		Remote	RemoteWeb3DeveloperFreelance
Product Engineer (Fullstack)	Subspace Labs			RemoteWeb3DeveloperEngineering
Senior BlockOps Engineer (Golang) - Sygma	ChainSafe Systems			RemoteWeb3Non TechResearch
Protocol Engineer (Core)	Subspace Labs			RemoteSecurityDeveloperWeb3

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Web3 Frontend Engineer - React/TypeScript

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