Senior Software Engineer - AI Engineering
Core
Building and scaling Mercury's internal AI platform and enablement layer to create shared infrastructure, context, and capability for the company.
Role type
Senior IC backend engineer specializing in AI infrastructure and platform engineering
Builds
MCP servers, LLM gateway infrastructure, shared knowledge layers, sandbox environments, and self-service tooling for AI prototyping
Domain
SaaS / Fintech / AI Infrastructure
Deliverable
production ML models | infrastructure | product features
Required skills
backend development in complex production systems, LLM-powered system architecture (RAG, agents, evals), platform engineering, infrastructure design, developer tooling, cost modeling, observability, policy-as-code
Preferred skills
high agency and self-direction, cross-functional communication, experience with prompt engineering and guardrails
Technologies
MCP servers, LLM gateways, RAG pipelines, agent frameworks, policy-as-code
Responsibilities
Extend and harden the AI platform foundation including MCP servers and LLM gateway infrastructure; shape and maintain structured context artifacts for accurate LLM reasoning; enable faster prototyping by building sandbox environments and self-service scaffolding for non-engineers; partner with domain teams to standardize sources of truth and improve knowledge discoverability
Seniority
Senior, hands-on IC
