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 web product suite and be able to influence the creation, design, and execution of future products. You will ensure 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 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 will you 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 features as well as design ideas and helping to estimate and prioritize them with the team
 
Push the boundaries of how decentralized a user interface can be. We deploy our products using the traditional hosted approach but also on IPFS/ENS and use other decentralized infrastructure providers (The Graph, Ethereum Nodes, etc.) to reduce our reliance on centralized 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, a strong communicator, and you 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!