Staff Software Engineer, Product (São Paulo)

Who Should Apply We are looking for developers from all technical backgrounds and language specializations. If you write clean code and understand software design, you are a fit: Software Engineers & Computer Scientists specializing in algorithms, data structures, or system design. Full-Stack & Web Developers working with modern front-end or back-end frameworks (JavaScript, TypeScript, React, Node.js, Python, PHP, Ruby, etc.). Backend & Systems Developers experienced in languages such as C++, Java, Go, Rust, or Python. DevOps & Database Engineers familiar with API design, SQL/NoSQL databases, or scripting. Role & Responsibilities As an AI Code Trainer , you will evaluate model-generated code, author reference solutions, and stress-test AI reasoning across various engineering domains. Code Auditing & Quality Analysis: Critique AI-generated solutions for logic, performance, security vulnerabilities, syntax, and coding best practices. Gold-Standard Solutions: Write clean, production-grade reference code and clear technical explanations for complex programming prompts. Test Design: Build unit tests and edge-case scenarios to evaluate model accuracy and expose edge-case failures. Technical Feedback: Write structured explanations detailing why an AI solution succeeds, fails, or produces bugs. Requirements Software Engineering Proficiency: Strong core fundamentals in at least one major programming language or web stack (e.g., Python, JavaScript/TypeScript, Java, C++, Go, C#, Rust, PHP). Debugging & Code Review: Ability to quickly analyze third-party code, catch subtle logical errors, and evaluate efficiency. Technical Communication: Clear written English to explain technical concepts and code review rationales effectively. Eligible Locations: Resident of USA, UK, Canada, Australia, New Zealand, India, Pakistan, or Philippines . Why Join Us? $50–$125/hr commensurate with your technical domain expertise and task complexity. Weekly Guaranteed Payouts directly to your choice …

$45-$120/Hour

Veröffentlicht 5 Oct 2026

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. What we offer: The rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers. No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best. We'll manually find the best project for you according to your skills and preferences. Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours. We respect your seniority so you can expect no micromanagement or screen trackers. Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah? We will support you from the time you submit the application throughout all cooperation stages. Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do. Requirements for the Senior React & Python Position: 4+ years of software development experience. Commercial experience: React.js 3+ years & Python 3+ years OR React.js 2+ years & Python 5+ years OR React.js 5+ years & Python 2+ years Experience with AWS, GCP, or Azure is required. Other requirements: Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture. Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls. Strong self-organizational skills — ability to work full-time remotely with no supervision. Reliability — we want to trust you and expect that you won’t let us and the client down. Adaptability and Flexibility — the ability to …

Veröffentlicht 2 Oct 2026

Senior Developer? Work Remote. Get Paid Well. Build What Matters. Lemon.io connects hand-picked senior developers with vetted startups across the US and Europe — no bidding wars, no ghosting, just serious opportunities. We're currently hiring for a research-driven AI company on a mission to slash the cost of modern AI — co-designing hardware, software, algorithms, and models to make AI's benefits accessible to everyone. They're active open-source contributors, building the infrastructure behind next-generation AI at scale. Open roles: Senior Back-end Engineer (Golang), Senior DevOps Engineer, Senior Site Reliability Engineer, Senior Storage Engineer, Senior Python & LLM Developer, Senior Back-end Engineer (Python) Why this one's worth a look: You'll be working on infrastructure that directly shapes how AI gets built and deployed, at a company operating at the frontier of the field. Locations: the UK, Singapore, the US, and Canada. Requirements for Senior Back-end Developers: 5+ years of software development experience 3+ years of experience with Golang and/or Python 2+ years of experience with Kubernetes 2+ years of experience with AI agent development Not your stack? We're placing Senior Developers (4+ yrs commercial experience) across AI Agent Architecture, AI Automation Architecture, AI Engineering, Site Reliability Engineering, Platform Engineering, React & Python, React & Golang, Golang, React & Java, React & Ruby, Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, iOS & Swift, Flutter & Firebase, Solutions Engineer, Blockchain (Ethereum/Ethers.js/Wagmi/Viem/Solana), Angular & Node.js, Vue & .NET, Python & Vue, DevOps, MLOps, Data Science, Angular & PHP, Angular & .NET, Symfony & React, Symfony & Vue, Symfony & Angular, Python, Symfony & JavaScript & Next.js & TypeScript, Data Analysis, React & PHP, Data Engineering, Project Management, Product Management, QA Automation, QA Manual, Embedded Software Engineering, React Native & Node, React Native & Re…

Veröffentlicht 30 Sept 2026