Senior Backend Engineer API | Matcha

COMPANY At 0x https://0x.org/, our mission is to "Create a Tokenized World Where All Forms of Value Can Flow Freely". We deliver this to web3 builders with a delightfully simple suite of developer APIs that provide faster trading, better prices, and superior user experience. Founded in 2017, we’ve processed over 211M+ transactions and $180B+ in trading volume from users trading on Matcha, Coinbase Wallet, Robinhood Wallet, Phantom, Rainbow, DefiLlama, MetaMask, Zerion, Zapper, and many more. Our investors include Greylock Partners, Pantera Capital, and Jump Crypto. When you join 0x, you’ll become part of a veteran team of crypto builders who know the importance of code quality, team cohesion, and a culture of learning. Matcha http://matcha.xyz/ is a DEX aggregator, built by 0x. With over 5 million tokens indexed across 9 blockchains, the decentralized exchange provides aggregated liquidity from +100 sources and the most efficient trade execution through smart routing. Matcha offers swaps, limit orders and cross chain trades, having enabled over $62B volume and 3.5M+ trades as the first consumer-facing product by the 0x team. 0x http://0x.org/ platform is developers' one-stop shop to build financial products on crypto rails. 0x empowers hundreds of teams and developers with essential web3 tools to enable faster trading, better prices and superior UX. Our suite of APIs has processed over 60M+ million transactions and $133B+ in volume from more than 6 million users trading on apps like Coinbase Wallet, Robinhood Wallet, Metamask, Zerion, Zapper, and more. MATCHA API TECH STACK We care far more that someone has solid fundamentals, strong learning agility, and is an overall good human. That said, we’re excited about the rapidly evolving tech we’re building on. It includes: - TypeScript + Node/Express (core stack) - Rust - AWS Cloud Services (Kubernetes, Kafka, Postgres, Redis, OpenSearch, etc) - Grafana LGTM Observability Stack - Next.js RESPONSIBILITIES - YOUR MISSION - 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 REQUIREMENTS - WHO YOU ARE - 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. BENEFITS - The base salary range for this position is $95,000 - $230,000 + equity + ZRX tokens + benefits. Within the range, individual pay is determined by job-related skills, experience, location, business needs, and candidate preferences between the different compensation elements. - Comprehensive insurance (medical/dental/vision/life/disability) for U.S.-based employees — 100% of base plan covered for you and dependents - 401k and FSA for U.S.-based employees - Monthly mobile phone bill, wellness, and pre-tax transportation expense - Covered mental health benefits (included professional therapy sessions) - A supportive remote environment - Lunch reimbursement for all employees across the globe! - Stipend for your ideal remote / WFH set-up: headphones, and any other work gear you may need - 12-week paid parental leave - Great office conveniently located in the SF Financial District for those in the region! - Flexible vacation: Take time when you need it (and we really mean it!) 0x and its associated entities are dedicated to fostering diversity, inclusion, and belonging in its teams and workforce, and are proud to be equal opportunity employers. 0x does not make employment or hiring decisions on the basis of race, color, creed, religion, sex (including those who are pregnant or have given birth), sexual orientation, gender, gender expression or identity, age, disability, medical condition, genetic information, military or veteran status, marital status, pregnancy, citizenship, national origin, immigration or citizenship status, political affiliation, or any other basis that is protected by applicable local, state, or federal laws. This includes not making such decisions based on the status itself, as well as any associations, perceptions, and assumptions made regarding these statuses. 0x will also consider qualified applicants with arrest and conviction records in a way that is consistent with San Francisco’s Fair Chance Ordinance and similar local laws. Our commitment to equal employment opportunity extends to ensuring that all applicants and employees can perform to their fullest potential, including through obtaining reasonable accommodations when necessary.