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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. Through our community, we will connect you with the best developers from more than 75 countries. 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. Requirements for the Senior Node & React Position: 5+ years of software development experience Commercial experience: React.js: 3+ years, Node.js: 5+ years, and Next.js: 2+ years OR React.js: 5+ years, Node.js: 3+ years, and Next.js: 2+ years Expertise in TypeScript, AWS and AI-assisted coding is a must. Requirements for the Senior Ruby & React Position: 5+ years of software development experience Commercial experience: React.js: 2+ years, Ruby: 5+ years OR React.js: 5+ years, Ruby: 2+ years Experience with …

80000 – 200000

Posted 9 Oct 2026

Please note. Directly emailing us will result in immediate disqualification. Use the application form to apply. About OkWhen OkWhen builds technology that powers live, virtual, and hybrid events. Our platform supports conference management, registration, payments, mobile apps, content libraries, webinars, LMS functionality, CEU tracking, sponsor management, and operational workflows. We are hiring a Senior .NET Software Engineer to help us improve, maintain, and extend a production platform used to run complex events. The Outcome We’re Hiring For You will own meaningful parts of our application and consistently deliver reliable software without requiring constant supervision. You will improve system performance, reduce technical debt, and turn operational problems into simple, maintainable products. This is not a ticket-taking role. We need an engineer who can understand the existing system, make sound technical decisions, and follow work through from discovery to production. Responsibilities Design, build, test, deploy, and maintain production software Develop backend services and APIs using C# and ASP.NET/.NET Build and maintain web applications using Angular Design, optimize, and troubleshoot SQL Server databases and queries Maintain and extend mobile applications using .NET MAUI Investigate and resolve production issues Improve application reliability, performance, security, and observability Write automated tests and maintain technical documentation Participate in code reviews and establish engineering standards Collaborate with product, operations, and event-production teams Break ambiguous business problems into clear technical plans Use AI-assisted development tools responsibly to improve speed without sacrificing quality 7+ years of professional software development experience Strong commercial experience with C#, .NET, and ASP.NET Core Strong experience with Angular and TypeScript Advanced working knowledge of SQL Server, database design, and qu…

Posted 20 Sept 2026