> JEyes / Rails

Firstup (formerly SocialChorus) is a communication platform that improves employee experience. They are hiring a Senior Full Stack Engineer to design and deliver large-scale SaaS applications with a focus on availability and reliability. Minimum requirements include 5+ years of experience, full-stack fluency, and familiarity with technologies such as Ruby on Rails, TypeScript, Node.js, or React.js.

Mango Languages, a language learning platform company, is seeking a Senior Agentic AI Software Engineer. This fully remote, hands-on role involves working on their core platform, integrating AI-assisted development processes, and raising AI fluency across the engineering team. Key requirements include strong Ruby experience with Python for ML and Go for performance, daily use of Claude Code for production code shipping, experience with multi-agent workflows, RAG systems, and disciplined prompt engineering, along with strong system design and communication skills.

NinjaHoldings, a fintech company revolutionizing financial services, seeks a Staff Engineer to define technical strategy for key systems, ensuring scalability and extensibility. The role requires 10+ years of software development experience, including 8+ years with Ruby on Rails, and hands-on experience in system architecture, coding, and AWS cloud infrastructure. Responsibilities include architectural leadership, cross-team collaboration, and mentoring.