Software Engineer (Agentic Platform)

Join Axion, a fast-paced early-stage company, as a Staff Software Engineer. In this senior individual contributor role, you will own the technical architecture for our agentic systems, build and harden the reasoning layer and infrastructure, and establish rigorous evaluation and testing for non-deterministic systems. You will partner across Engineering and Product to shape the technical vision and roadmap for the agent platform, raise engineering standards, and mentor engineers on agentic patterns and system design.

• Architect and scale the agentic systems at the core of the Axion platform, making design decisions that determine how agents reason, act, and integrate with enterprise data.
• Own the technical architecture for agentic systems, including orchestration, tool use, memory, retrieval, evaluation, observability, and the guardrails that keep agents reliable.
• Establish rigorous evaluation and testing for non-deterministic systems, measuring agent accuracy against expert-validated ground truth and the outcomes customers track.
• The ideal candidate thrives in early stage companies, has deep experience building complex, data-intensive systems, and knows what it takes to make non-deterministic, LLM-driven systems reliable in production
• A strong executor in fast-paced environments who can balance shipping MVPs with a commitment to production-grade systems
• Hands-on fluency with the modern agentic stack and a strong intuition for the failure modes of non-deterministic, LLM-driven systems—plus the evaluation and observability practices needed to tame them
• Experience turning messy, heterogeneous real-world data into something a model can reason over reliably
• A track record of technical mentorship; you make the engineers around you better without needing formal authority
• Demonstrated ability to design and own complex distributed systems, ideally in data-intensive B2B SaaS environments
• A firm believer in a "Data First" philosophy who can make sound decisions in ambiguous, fast-moving situations
• Minimum 7+ years of software engineering experience, with recent, hands-on focus on building agentic systems (LLM orchestration, tool/function calling, multi-step and multi-agent reasoning, retrieval and context engineering, and interoperability protocols such as MCP, or comparable work)
• You value feedback — giving it, receiving it, and acting on it — and you see collaboration as a competitive advantage, not a burden. You’re low-ego but high-agency: you care about winning as a team more than being right individually. You move quickly, communicate directly, and make decisions grounded in impact and data
• You’re a builder and operator who thrives in fast-moving, high-accountability environments. You take pride in getting things done — thoughtfully, efficiently, and without drama. You’re energized by ambiguity, skilled at bringing clarity, and comfortable flexing between strategy and execution
• You don’t need constant direction — you create momentum. You take ownership for outcomes, and you expect the same from those around you