Software Engineer - Backend

Software Engineer - Backend$90-120/hr Remote Freelance CODINGAbout the RoleWhat if your backend engineering expertise could directly shape how AI writes, reviews, and understands code for millions of developers around the world? We're looking for experienced Backend Software Engineers to evaluate AI-generated code, craft high-quality solutions, and help ensure the next generation of AI systems meets the bar that real engineers demand.This is a fully remote, asynchronous contract role. Work on your own schedule, take on as much or as little as fits your life, and make a direct impact on frontier AI — no commute, no meetings, no micromanagement.Type : Hourly ContractLocation : RemoteCommitment : Minimum 15 hrs/week, flexible schedulingWhat You'll DoReview and evaluate AI-generated backend code across languages like Python, Node.js, Java, and Go — assessing correctness, efficiency, scalability, and clarityWrite high-quality backend solutions to server-side and API development problems spanning a range of difficulty levelsCraft clear, developer-friendly explanations of architectural decisions, code logic, and problem-solving approachesIdentify edge cases, ambiguities, and failure modes in AI-generated code and problem statementsApply best practices in RESTful API design, database usage, asynchronous programming, and system architectureWho You AreStrong backend engineering background with hands-on experience in server-side languages and frameworks — Python, Node.js, Java, Go, or similarSolid understanding of RESTful APIs, databases (SQL and/or NoSQL), and asynchronous programming patternsComfortable with architectural trade-offs and able to articulate decisions clearly in writingSharp eye for bugs, edge cases, and code quality issues — you hold AI-generated code to the same standard you'd hold your ownStrong written English communication skills — you can explain complex technical concepts clearly and conciselyNice to Have3–5+ years working with backend frameworks or domains such as Express, Django, Spring Boot, microservices, or cloud platformsBachelor's degree or higher in Computer Science or a related fieldExperience with data labeling, RLHF, or AI training workflowsFamiliarity with distributed systems, message queues, or cloud infrastructureWhy This RoleReal impact — your expertise directly improves AI models used by top research labs and enterprise teams worldwideFull autonomy — fully remote and async, work when and where you do your best thinkingFlexible commitment — structured enough to be meaningful, flexible enough to fit around your existing workGrow with the platform — high performers take on expanded responsibilities and help shape new programsCutting-edge work — stay at the forefront of AI development while doing what you already do best