Software Engineer - LLM Systems

About the role

In this role, you'll own the core LLM infrastructure powering two products redefining B2B research: Hub – The central cockpit for B2B research. Build self-serve features that compress weeks into days: question → expert insight → follow-up, powered by RAG and adaptive workflows. Prime – Syndicated intelligence at scale. Architect automated systems that continuously capture expert opinions—creating longitudinal datasets and refreshable dashboards that compound in value.

Required

• You write exceptional code, fast. 3-4 years of experience shipping production code in a fast-paced environment
• Full-stack expertise: Moderate proficiency in React, TypeScript, and modern frontend frameworks.
• Backend experience with Python, Node.js, or similar
• AI/ML implementation experience: Hands-on experience integrating LLMs, building with OpenAI/Anthropic APIs, or implementing ML models in production.
• We care more about a demonstrated eagerness to learn and an understanding of complex systems than specific years
• Cloud and infrastructure: Experience with AWS, Docker, and modern deployment practices
• Quality mindset: Experience with testing, code reviews, and maintaining high code quality standards
• Customer focus: Ability to translate user needs into technical solutions while maintaining engineering best practices

Nice to have

• RAG systems, embeddings, semantic search
• Real-time data processing or streaming architectures
• Open-source contributions in AI/ML

What Actually Matters

• We care less about credentials and more about demonstrated ability. If you've built something interesting with LLMs- a side project, an open-source contribution, a blog post that shows how you think- put that at the top of your application.

Why Join NewtonX?

• Frontier technology: Work with cutting-edge AI systems, pushing the boundaries of what's possible in enterprise AI applications
• Exceptional traction: Strong product-market fit with the world's largest investment banks, hedge funds, and consulting firms
• World-class team: We take talent density seriously. Work alongside incredibly smart, driven people who are passionate about their craft
• High velocity: Ship features that directly impact how billion-dollar decisions are made
• Growth opportunity: Join during a hypergrowth phase with clear paths for technical and career advancement
• Impact: Your work will directly shape how the world's leading organizations make critical business decisions

What We Offer

• Excellent medical, dental, and vision insurance.
• 401k match with immediate vesting.
• Generous Paid time off, holidays, and parental leave.
• Diverse, collaborative, and positive culture where we invest in and celebrate each other’s success.
• Flexible work environment where we work hard but have fun (happy hours, team projects, and retreats).

Compensation Range

$180K - $220K