Principal Software Engineer at Xplor

About the Role You’ll be one of the first key engineering hires on a new AI Products & Platform initiative, working directly with senior leadership to shape how AI is built and applied across Momence and the broader Xplor Fitness ecosystem. This is a foundational role — you’ll help establish patterns, ship early AI-driven capabilities, and influence the technical direction of AI across multiple products. The work spans customer-facing features and internal platform capabilities that enable teams to move faster with AI. Reporting into the VP of Engineering, you’ll work across backend services, APIs, integrations, and frontend experiences. AI/ML experience is helpful but not required — what matters most is strong engineering fundamentals, product thinking, and the ability to operate in ambiguity. What You’ll Do • This is a full-stack role where you will build and ship AI-powered features across the Momence platform (e.g., AI sales & support agents, intelligent member engagement, natural language reporting, workflow automation) • Develop integrations with leading AI providers (e.g., OpenAI, Anthropic) and evolving interfaces • Design and implement scalable AI patterns including prompt frameworks, evaluation pipelines, and feedback loops • Contribute to building AI-native capabilities embedded into core product workflows • Build internal tooling to accelerate engineering velocity (AI-assisted development, testing, migration tooling, agent workflows) • Collaborate with teams across Momence, Mariana Tek, and other platforms to identify high-impact opportunities for AI • Contribute to architecture decisions and help define technical standards for AI systems • Operate end-to-end — from identifying opportunities to delivering production-ready solutions • Help establish responsible AI practices including observability, logging, evaluation, and human-in-the-loop systems  - This average base salary pay range for this position is $150,000-$200,000 USD. - For this role, we can offer a fully remote working arrangement once you are based in the United States and hold full working rights. Ideally, the candidate would be based in the East Coast time zone to enable effective collaboration with engineering team members in Prague, Czechia. #LI-Remote