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Our Mission Our mission is to bring web3 to a billion people, by providing builders with the tools they need to build exceptional onchain products. Alchemy is the only complete developer platform that offers the powerful APIs, SDKs, and tools necessary to build and scale onchain apps and rollups. Our infrastructure powers 70% of the top web3 teams, 90%+ of web2 companies building in web3 and 100+ million end users. Our customers include top web3 brands like Polymarket, OpenSea, Circle, WorldCoin, as well as major global brands like Shopify and Adobe. The Alchemy team draws from decades of... more ->
About the Company PayPal has been revolutionizing commerce globally for more than 25 years. Creating innovative experiences that make moving money, selling, and shopping simple, personalized, and secure, PayPal empowers consumers and businesses in approximately 200 markets to join and thrive in the global economy. We operate a global, two-sided network at scale that connects hundreds of millions of merchants and consumers. We help merchants and consumers connect, transact, and complete payments, whether they are online or in person. PayPal is more than a connection to third-party payment... more ->
Company Overview PayPal has been revolutionizing commerce globally for more than 25 years. Creating innovative experiences that make moving money, selling, and shopping simple, personalized, and secure, PayPal empowers consumers and businesses in approximately 200 markets to join and thrive in the global economy. We operate a global, two-sided network at scale that connects hundreds of millions of merchants and consumers, helping them connect, transact, and complete payments both online and in person. PayPal offers proprietary payment solutions that allow merchants to complete payments on its... more ->
Backend Software Engineer - Optimization & Platform Systems Confidential Client - Purple Squirrel Enterprises About the Opportunity Our client is a U.S.-based technology company building advanced Back End software platforms that support complex, performance-critical, and regulated environments. Their systems solve large-scale computational problems where efficiency, accuracy, and reliability are essential. Purple Squirrel is managing this search on a confidential basis and will evaluate candidates prior to submission to the client. Role Overview We are seeking a Backend Software Engineer to... more ->
Senior Software Engineer, Backend - Frontier Data The Frontier Data team builds the data and systems that power Scale's most advanced Frontier AI use cases (agentic capabilities like coding agents, tool use, and GUI/computer-use automation). Our work sits at the intersection of applied AI and robust Back End engineering: we turn messy, ambiguous problems into scalable platforms and pipelines that reliably produce high-quality outcomes. We're looking for a Senior Backend Engineer who thrives in ambiguity, moves fast, and enjoys tackling daunting challenges - someone who can design and build... more ->
Senior Software Engineer, Backend - IT Product Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single system. Take onboarding, for example. With Rippling, you can hire a new employee anywhere in the world and set up their payroll, corporate card, computer, benefits, and even third-party apps like Slack and Microsoft 365-all within 90 seconds.... more ->
About Clay Our mission is to help organizations turn any growth idea into reality. We see growth as a creative practice, not a formula. Finding and reaching your best-fit customers takes unique ideas and constant iteration. As AI makes execution faster and tactics easier to copy, creativity is the only lasting advantage. We're already helping thousands of customers - including Anthropic, Waste Management, Figma, and Ramp - go to market with unique data, signals, and AI research. In 2025, we crossed $100M in revenue and raised a $100M Series C at a $3.1B valuation, backed by world-class... more ->
Software Engineer II, Backend - Financial Product Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single system. Take onboarding, for example. With Rippling, you can hire a new employee anywhere in the world and set up their payroll, corporate card, computer, benefits, and even third-party apps like Slack and Microsoft 365-all within 90... more ->
Software Engineer II, Backend Full Stack - IT Product Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single system. Take onboarding, for example. With Rippling, you can hire a new employee anywhere in the world and set up their payroll, corporate card, computer, benefits, and even third-party apps like Slack and Microsoft 365-all within 90... more ->
Senior Backend Software Engineer, Media Ingestion & Serving Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: The Media Foundation team is at the forefront of building the platform that powers all of Airbnb's media experiences-from the photos that help... more ->
Senior Backend Software Engineer - Platform Systems Preferred location is San Francisco, CA Confidential Client - Purple Squirrel Enterprises About the Opportunity Our client is a U.S.-based technology company building high-performance Back End and distributed software platforms used in mission-critical and regulated environments. Their systems operate across complex, heterogeneous compute infrastructures where performance, scalability, and reliability are essential. Purple Squirrel is managing this search on a confidential basis and will evaluate candidates prior to submission to the client.... more ->
This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack . Overview Backend Software Engineer Company Description High-growth AI startup What you will do Architect and deploy scalable Back End platform systems to support large-scale data processing and organizational insights Develop and optimize LLM agents using agentic frameworks and RAG to enhance the platform's contextual understanding Take full ownership of features in an early-stage environment, moving quickly... more ->
Overview You'll lead critical Back End initiatives for the millions of creatives using ComfyUI, building systems that run millions of AI workflows. This means building rock solid distributed systems, designing data models that support explosive growth, and solving difficult scaling and optimization problems. You will make code changes across open source ComfyUI and Comfy Cloud. Our stack is Python, Go, Kubernetes, and Postgres on the backend, but we care way more about your ability to learn and ship than whether you've used these exact languages before. You might be a good fit if You enjoy... more ->