UMA Purpose: UMA is the canonical source of truth that blockchains use to verify real world data.

UMA Vision: UMA enables any verifiable truth to be recorded on-chain, trustlessly.

Who is Risk Labs?

Risk Labs is the foundation and core team behind the UMA and Across projects. UMA and Across are decentralized protocols governed by community members across the globe in DAOs, and are supported by Risk Labs Foundation. UMA’s optimistic oracle (OO) can record any verifiable truth or data onto a blockchain.

Across is a cross-chain bridge for L2s and rollups secured by UMA’s OO.

Where do you fit in?

We are looking for an experienced frontend lead to join our team. You will have the opportunity to lead the effort on turning design into reality across a variety of projects. This role requires the dynamism to work on quick proof-of-concept projects or within a methodical product development cycle depending on the objective, all while leading a small pod of frontend developers as their technical mentor and manager.

As a frontend lead working on both Across and UMA, you will architect and shape the user experience across many dApps and be an integral part of how people interact with our products. This will require sharp time management skills and the ability to scope and triage your own work in collaboration with your team.

Our tech stack: React, Typescript, viem, ethers Solidity, Node.js, Vercel, GCP

Responsibilities

• Lead the frontend team to scope and build fresh, delightful, snappy applications.
• Manage the developers on your team with empathy and accountability.
• Represent your team when collaborating with product, design, and other engineering teams.
• Expand on the work of other developers by diving into existing codebases to add features or fix bugs.
• Write code in a highly collaborative open source ecosystem. In depth reviews of others’ contributions is expected with a focus on helping others grow their technical expertise.

Requirements

• 4+ years full-time experience with frontend development in React.
• Passion for blockchain technology, cryptoeconomic protocol design, game theory, or decentralized finance.
• Demonstrated ability to learn new technology, solve problems, and build software.
• Experience with technical leadership and people management.
• Experience with the following technologies (in order of importance): React, ethers.js, viem, ethers, Typescript, NextJS and Vercel, Solidity/EVM.

Compensation and Benefits

• Pay packages include competitive salaries & meaningful token options.
• Salaries for this role range from $150-200k (USD), and your token allocation can grow with your voting rewards while you participate in the growing ecosystem.
• Will pay in stablecoins or fiat
• Philosophies for a culture that show we care: Take vacation when you need it, family care, training and development (just to name a few)
• 100% remote, which means we encourage you to create the work environment that you thrive in
• At least two team wide offsites a year

Closing

Studies have shown that women and people of colour are less likely to apply to jobs unless they meet every single qualification. Risk Labs, the employing entity, is an equal opportunity employer and is dedicated to diverse, inclusive, and authentic workplaces. So, if you’re excited about this role but your past experience doesn’t perfectly align- we encourage you to apply anyways. We value you taking the chance. Risk labs will not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Our values:

1. We value each individual’s right to economic freedom
2. We value openness, honesty, and directness.
3. We value integrity.
4. We value iterative learning.
5. We value taking smart risks. We value creating an environment where everyone “does their best work”.

Why do we love working at Risk Labs?

We are a group that’s aligned with the ethos of the crypto industry and doing our best to make an impact for the industry and world at large. You’ll succeed with Risk Labs if you’re a self-starter, kind, adaptable, and passionate about making an impact. Risk Labs is a values driven team that strives to create an environment where we can do our best work, and succeed. We’re building products that we believe in, and continuing to strive for innovation and growth. Both personally and professionally we support each other to create a happy, healthy, and inspired team vibe, so we can remain motivated to build things the world needs and loves. We take pride in the fact that we are at once family-friendly as well as nomad-friendly.

UMA’s optimistic oracle is a decentralized truth machine for Web3- yes, that’s a bold and very exciting statement. We’ve built a solid foundation, in terms of the team, the technology, and the products, and the road map ahead is one full of exciting technical challenges, growth, and telling our story to the world.

Across is the Bridge Ethereum Deserves. The more people know, the more they love us for being the fastest and most capital efficient bridge. The interoperability space is early, and it’s anyone’s game-we’re here to win.

Still want to know more?

• Our team blends a mix of highly-sought engineers, and a diverse business team to showcase their high quality tech. Our international and fast-growing team includes a diverse background of experiences and has drawn world class talent. We have a great network of supportive investors from groups like: Placeholder, Blockchain Capital, Bain Capital, Coinbase, Dragonfly… to name a few.
• Teammates take the time off that they need and support each other to be their best selves- we care about your wellness.
• You will not get bored with Risk Labs. We are constantly developing, building, experimenting and evolving. Yes we try to allow people to focus on their specific product areas, but things are always shifting and evolving. There’s no right answer and we’re all just doing our best!

Apply Now:

Apply Now:

Protofire as great enthusiasts and active contributors to the open-source blockchain communities, we help builders and providers of decentralized infrastructure, protocols, and applications, bootstrap the demand and supply sides of their markets and accelerate mass adoption.

We help startups with protocol & smart contract engineering, high-performance trusted data feeds (oracles), and awesome developer tools (SDKs/APIs).

Since we started in 2016 we’ve had a chance to contribute to the development of many top projects in the blockchain ecosystem, including Maker, Chainlink, Tezos, Gnosis, Kyber Network, The Graph, Filecoin, Synthetix, Avalanche, and more. Apart from that, we are running one of the biggest indexer nodes in the Graph Network, participating as bridge relayers and validators helping projects and networks to further decentralize their infrastructure.

We are now looking to hire a cross-disciplinary team to help Protofire scale. As such, we’re looking for a Solidity Developer who’s had extensive experience writing, testing, deploying, and auditing smart contract code and who is up to date on the current developments in Solidity.

Besides knowing Solidity, we’d love to hear your informed opinion on the latest developer tooling, adhere to industry best practices, and follow the latest vulnerabilities and hacks in the Ethereum smart contract space with interest.

How you will make an impact:

• Produce high quality, performant, and well-tested Solidity code
• You’ll be working with advanced smart contracts, working on new features for the protocols, and creating new technical DeFi primitives
• Conducting technical due diligence and understanding dynamics/tradeoffs between different blockchain protocols
• Perform smart contract audits and identify vulnerabilities
• Work closely with the product team towards building out a DeFi application Integrating front ends with smart contract code
• Achieve comprehensive unit and integration test coverage
• Design and ideation of new functionality

What you need to succeed:

• 5+ years of experience in another programming stack or language
• 1+ years of Solidity smart contract development experience
• Understanding of Javascript Ethereum SDK’s (web3.js, ethers.js)
• Experience deploying Dapps or smart contracts on to Ethereum
• Smart contract dev tools/frameworks - hardhat and truffle
• Hands-on experience conducting smart contract audits, including identifying vulnerabilities, documenting findings, and providing recommendations for remediation.
• Familiarity with common attack vectors and auditing methodologies (e.g. reentrancy, front-running, integer overflows, gas optimization, etc.)
• CI/CD setup experience
• Deep understanding of the Ethereum Virtual Machine and the broad decentralized finance ecosystem
• Problem-solving attitude, ability to act autonomously, participate in discussions, and actively propose solutions.
• Excellent communication skills - You know how to work in teams, give and receive feedback, identify bottlenecks.
• A desire to keep up with blockchain technology trends and a real interest in decentralization

Apply Now:

Apply Now:

About Us

Re7 Capital is a London-based cryptoasset investment firm, leveraging our deep crypto network and proprietary data infrastructure to drive investment decisions across various DeFi and alpha strategies. Through Re7 Labs, we also collaborate with leading projects and blockchains to design DeFi ecosystems, provide on-chain risk curation, and deliver vault management services.

Our team combines expertise in investment management, data science, and crypto. To support our continued growth, we are seeking a motivated Full Stack Web Developer to join our engineering team. Reporting directly to the Head of Technology, you will take full ownership of our dApps, used to interact with our vault smart contracts.

Responsibilities

• Develop and maintain responsive, user-friendly front-end interfaces using React, Next.js, Vue or similar frameworks.
• Integrate EVM and non-EVM smart contracts using libraries like Ethers.js, Web3.js, Viem, Starknet.js and wallet connectors such as ConnectKit and wagmi.
• Support wallet integrations including MetaMask, Argent X, and Braavos.
• Design and implement scalable back-end services and APIs using Node.js, Express, and related technologies.
• Collaborate with blockchain engineers to interact with smart contracts and on-chain data.
• Implement best practices for security, including wallet connectivity, transaction handling, and protection of user data.
• Deploy and maintain applications on AWS (EC2, Elastic Beanstalk, S3, CloudFront), with a focus on scalability, logging, and monitoring.
• Set up and manage CI/CD pipelines using GitHub Actions or similar tools to automate testing and deployment workflows.
• Deploy applications to decentralized hosting environments (e.g., IPFS, Fleek) as well as cloud-based infrastructure.
• Ensure performance optimization through CloudFront caching, invalidation strategies, and SSL/TLS management.
• Contribute to Whisk infrastructure and security, ensuring resilient and secure production deployments.
• Work closely with designers, PMs, and cross-functional teams to define and deliver new DeFi features and enhancements.
• Implement and maintain interactive UI elements and animations using modern HTML/CSS (including transitions, keyframes, and responsive styling) within PHP-based web applications.

Requirements

• Proficiency in JavaScript/TypeScript and PHP.
• 5+ years of experience in web development, including 3+ years in dApp development.
• Hands-on experience integrating and interacting with both EVM and Non-EVM smart contracts.
• Familiarity with ConnectKit, wagmi, and Viem libraries for modern wallet connection flows.
• Experience deploying web applications on AWS using services like Elastic Beanstalk, EC2, and S3, with understanding of environment config, auto-scaling, and CloudWatch logging.
• Proficient in setting up CI/CD pipelines using GitHub Actions (or similar tools), including artifact packaging and automated deployment.
• Working knowledge of CloudFront, CDN behavior, cache invalidation, and AWS Certificate Manager.
• Familiarity with IAM roles, security groups, VPC setup, and cloud infrastructure security best practices.
• Experience with front-end frameworks (React, Next.js, Vue, etc.)
• Comfortable working in Linux environments and using Git for version control.
• Understanding of DeFi concepts and major protocols (e.g., Uniswap, Aave, Curve).
• Awareness of and ability to support Whisk infrastructure and security requirements.
• Basic knowledge of HTML5, CSS3, and animation techniques (e.g., transitions, keyframes, scroll-triggered effects), with the ability to integrate them into PHP-rendered views or templating engines.

Benefits

• A dynamic, collaborative, and highly technical work environment.
• Opportunities for professional growth in a rapidly evolving industry.
• Remote-first setup with regular opportunities to meet the team in person.
• Competitive compensation package.

Application Process

Please submit the following:

• Your resume
• A cover letter explaining your interest in the role
• Your response to the following technical challenge:
• Challenge: Describe a high-level architecture and solution for a dApp that supports both EVM and non-EVM wallets (e.g., MetaMask and Braavos). Include considerations for wallet detection, abstraction, and secure transaction signing.