Senior Frontend Engineer (React.js/Web3)

About CoW Protocol 

CoW Protocol is on a mission to create the fairest and most efficient venue for exchanging assets on all EVM-compatible chains. Since launching a year ago, we have passed $19bn (yes, billion) in trade volume, and become the 2nd most popular DEX Aggregator on the market -- still aiming for #1. If you are a high-performing team player who wants to work on some of the most important problems in Ethereum (MEV protection, batch auctions, and more), we want to talk to you! Location: Onsite or remote Position: Full-time contractor  

About the role

We are looking for an enthusiastic, self-motivated engineer to help us build the next generation of decentralized trading protocols. As a dedicated front-end hire, you will gain ownership of our existing suite of web products, as well as have the ability to influence the creation, design, and execution of future products. You will be responsible for ensuring a consistent, high-quality user experience across trading interfaces, data-heavy analytics pages, documentation portals and more. You will have the opportunity to work with us on this challenge in one of our existing co-working spaces in Berlin or Lisbon. Alternatively, you can join us as a remote employee and work from your hometown, where we can also provide a membership for a local coworking space.   

Our tech stack

Product code: Typescript, React, Redux, styled components,  Web3 development: Web3, ethersjs, Hardhat, Solidity, IPFS, TheGraph, ENS Testing: jest, cypress, React testing-library  Analytic tools: Dune Analytics, Google Analytics  

What you will do

• Develop CowSwap and other user facing applications (e.g., the CoW Explorer) on top of CoW Protocol
• Rapidly implement new elements of the user experience, with an eye toward performance, accessibility and quality
• Know when to create abstractions vs. one-off features, and when to leverage or contribute to the wider open source ecosystem
• Shape the roadmap of CowSwap by contributing feature as well as design ideas and helping to estimate and prioritize them with the team
• Push the boundaries of how decentralised a user interface can be. We deploy our products using the traditional hosted approach but also on IPFS/ENS and use other decentralised infrastructure providers (The Graph, Ethereum Nodes, etc) to reduce our reliance on centralised APIs.

Who you are

• You have 3+ years of experience developing professional client-side web apps
• You demonstrate strong software engineering skills that follow industry leading practices
• You have a thorough understanding of React.js’s core principles, experience with TypeScript, CSS and at least one popular state management library (Redux, MobX, React hooks)
• You know how to implement and maintain test suites for React applications
• You enjoy staying up-to-date & experimenting with React’s latest features and other trends in the ecosystem
• You are a team player, strong communicator and love to share your knowledge with others
• You own your career trajectory, you are proactive and independent

It’s a plus if you bring:

• Understanding of the Ethereum blockchain and ecosystem, general finance and/or game theory and mechanism design.
• Experience with architecting complex software systems

What we can offer you

• Flexible work environment: join one of our hubs in Berlin or Lisbon or work remotely with the option of joining a local coworking space 
• Regular trips to reunite with the rest of the team 
• Conference budget to keep up to date with the developments of the ecosystem
• Learning budget to support your higher ambitions 
• Impact: you are joining a startup where you can make a huge difference. Your work matters!

We look forward to your application!