Senior Full-stack Developer

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than Lemon.io — the marketplace that connects you with hand-picked startups in the US and Europe. Currently, we are seeking a Senior Full-Stack Developer for our client. It's a great opportunity, as they are one of the fastest-growing YC companies. Their investors include Y Combinator and Box Group, and they support leading AI labs. Joining this project offers the chance to play a key role in the AI movement. Details: 40h / week - very likely a 6-day work week due to the fast-paced nature of the project start date: within 2-3 weeks Full-time within 2-3 weeks 2-3 months with potential to extend to 1-year engagement. (GMT -8:00) Pacific Time (US & Canada) What the Company Does: Develops tools and services for creating high-precision datasets used to train advanced AI models. Builds simulated environments and functional prototypes of well-known digital products (such as communication platforms, CRM systems, productivity tools, financial interfaces) so AI agents can learn to complete real-world tasks. Creates internal platforms for data management, quality control, and automation of data generation workflows. Works on long-term technologies that help AI systems better understand complex tasks, business logic, and user interfaces. Requirements: 5 years of experience with React.js and Node.js Expertise in JavaScript, Tailwind CSS, Next.js, AWS, and SQL is a must Tasks/responsibilities: Develop full-stack web applications from the scratch, replicating existing enterprise software. Collaborate with internal management and technical leads. Participate in a take-home assessment and interviews as part of the selection process. Deliver production-ready, scalable solutions using Next.js, Tailwind, SQL/Redis, and related technologies. Ideal profile: You have a diverse skillset and are open to learning new technologies. You have strong experience building stuff from scratch. Your background includes products that are used and loved by many; working at big companies or popular startups is a big bonus. Important: You are open to weekend work. It's likely going to be a 6-day work week regularly. You are open to completing a test task for this project, which will take roughly 10 hours and will be compensated (500$). Other Options from Lemon.io NOT YOUR TECH STACK? We have multiple projects available for Senior Developers. If you have 4 years of commercial software development experience and are proficient in any of the following areas: React & Node, React & Python, Node & Python, Unreal Engine, Data Engineering, WordPress, Svelte & TypeScript, Svelte & Node, Svelte & Python, Golang, Swift& SwiftUI, Shopify & JavaScript, PHP & Vue, Rust, MLOps, React Native & Node, PHP & Angular, PHP & React, Blockchain, or Data Analysis — we'd be happy to connect and match you with a suitable project. If your experience matches our requirements, be ready for the next steps: VideoAsk — watch a short video about our startup, up to 10 minutes Complete your profile on our website 30-minute screening call Technical interview Feedback Magic Box (we are looking for the best project for you). P.S. We work with developers from 50 countries in different regions: Europe, LATAM, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), Canada, and the UK. However, we have some exceptions. At the moment, we don't have a legal basis to accept applicants from the following countries: European: Iceland, Liechtenstein, Kosovo, Belarus, Russia, and Serbia. Latin America: Cuba and Nicaragua Most Asian countries and Africa. We expand and shorten the list of exemptions regularly. Do you represent a company with engineers who match the description and want to collaborate with us through staff augmentation? Then register. J-18808-Ljbffr