Principal Software Engineer
About The Position
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.
Requirements
- 8+ years of software engineering experience
- Strong backend fundamentals (API design, service architecture, data modeling, distributed systems)
- Solid frontend experience with modern frameworks, design systems, and web standards
- Proven ability to ship products or meaningful features end-to-end
- Comfort working in fast-paced environments with evolving requirements and ambiguity
- Strong ownership mindset — able to take ideas from concept to production
- Clear and proactive communication — this is a high-visibility, high-impact role
Nice To Haves
- Experience with LLM APIs (OpenAI, Anthropic), prompt engineering, or RAG pipelines
- Familiarity with agent-based systems or workflow automation using AI
- Experience with AWS (including Bedrock, Lambda, or event-driven architectures)
- Experience building internal developer tools or productivity systems
- Background in SaaS, B2B2C, or marketplace platforms
- Experience making architectural or build vs. buy decisions
Responsibilities
- 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
Benefits
- Unparalleled opportunities to learn and accelerated career development
- A collaborative, team environment with people who truly love what they do
- Paid parental leave benefits program
- Learning resources available to continue to develop your skills and career development
- Access to mental health support
- Flexible work arrangements
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
