Staff Software Engineer

<div class="content-intro"><p>Tellius is a fast-growing AI analytics company headquartered in Reston, Virginia. We are transforming how enterprises interact with their data — moving beyond dashboards and static reports to an always-on, agentic intelligence platform that investigates, reasons, and delivers finished answers autonomously.</p> <p>Our platform, powered by Kaiya — Tellius's AI agent — connects to all your enterprise data, automatically investigates what changed and why, and delivers board-ready briefings, memos, and presentations before you even ask. We serve some of the world's most innovative companies, including Novo Nordisk, PepsiCo, Regeneron, AbbVie, and Biogen — helping their teams go from question to decision in minutes, not days.</p> <p>We are recognized as a Visionary in the Gartner Magic Quadrant for Analytics & Business Intelligence Platforms, and we're just getting started. Our team is built for people who thrive on solving hard problems, moving fast, and building things that matter at enterprise scale.</p></div><p>We’re looking for a <strong>Staff Software Engineer</strong> to join our AI team. This is a high-impact, IC-focused role for someone who wants to build scalable AI systems that power real-world decision-making.</p> <h3><strong>What You’ll Do</strong></h3> <ul> <li>Architect and implement core infrastructure for AI agents and orchestration (e.g., LangChain, custom frameworks)</li> <li>Build and optimize backend services using Python and SQL to support AI workloads</li> <li>Engage with design partners and early customers to validate architecture, use cases, and product direction</li> <li>Develop robust data pipelines and work with large, complex datasets</li> <li>Contribute to agentic application design, grounding LLMs in structured data and business logic</li> <li>Collaborate with AI researchers, product managers, and design to ship production-ready features</li> <li>Collaborate with and mentor junior engineers</li> </ul> <h3><strong>What We’re Looking For</strong></h3> <p><strong>Must-Have Experience:</strong></p> <ul> <li>2-6 years of professional software engineering experience</li> <li>Deep knowledge of <strong>AI engineering</strong> and <strong>agent frameworks</strong> (LangChain, LlamaIndex, or similar)</li> <li>Strong backend skills with <strong>Python</strong>, <strong>SQL</strong>, and database design</li> <li>Experience working with data systems and building scalable infrastructure</li> </ul> <p><strong>Nice-to-Haves:</strong></p> <ul> <li>Experience with <strong>Spark</strong>, <