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0x · 2 weeks ago

Senior Backend Engineer API | Matcha

United States

Full-time

Remote

Mid, Senior Level

$95K/yr - $230K/yr

7+ years exp

0x is on a mission to create a tokenized world where all forms of value can flow freely, providing developers with a suite of APIs for enhanced trading experiences. The Senior Backend Engineer API will contribute to and lead projects, focusing on delivering high-quality software and mentoring other engineers.

BlockchainCryptocurrencyDecentralized Finance (DeFi)Ethereum

Responsibilities

Be an individual contributor on projects as well as lead technical projects of moderate to high complexity

Offer valuable insights as a peer when reviewing designs and performing code reviews

Create high quality, secure, clean code

Improve the way we build and deliver software

Consistently ship

Coach and mentor other engineers and generally up-level the team

Empathize with our customers and users

Qualification

TypeScriptNode/ExpressAWS Cloud ServicesDistributed architecturesRelational databasesMonitoring dashboardsDeFi knowledgeJSON-RPC APIsWeb3 librariesProblem-solving skills

Required

7+ years of experience solving complex distributed computing problems

Fluent in TypeScript/JavaScript - you can confidently write and debug APIs in Node/Express without relying on type-casting hacks or constant lookup

Experienced with designing and building systems that include: Relational or Key-Value datastores, Distributed, event-driven architectures (Kafka, queues, streams), Cloud-based deployment (preferably AWS), External-facing REST/HTTP APIs, Monitoring dashboards (preferably Grafana)

Strong problem-solving and debugging skills - you can isolate issues, reason through errors, and explain your approach clearly

Up to date on emerging trends in modern backend technology solutions (databases, queues, caching, etc.)

Passionate about DeFi and how it can improve people's lives. You've used DeFi apps yourself and care about building better ones

Two annual in-person team meet-ups around the globe

Preferred

Experience working with search engines (ElasticSearch, OpenSearch)

Solid understanding of blockchains (especially EVM chains). You know fundamentals like chain IDs (e.g., Ethereum mainnet = 1, Polygon = 137) and how replay protection works

Experience working with JSON-RPC APIs to interact with blockchain nodes for tasks like querying data, sending transactions, or monitoring events

Experience with Web3 libraries (e.g., ethers.js, viem, Web3.js) to build/test blockchain integrations