Want to design the architecture that lets AI agents safely refactor, test and ship production code? Then let's talk. Our client acquires enterprise software companies and turns them into AI-native, profitable, scalable businesses. They are a remote-first, AI-forward team spread across the globe, offering high ownership, flexibility and impact, work across multiple products and technologies, and growth pathways across engineering, product and leadership. The job: transform a 10+ year legacy codebase into a high-velocity, agent-operable architecture, at the intersection of software architecture, AI-agent orchestration and engineering governance. Contract Type: Contract, full-time Location: Fully remote from Eastern Europe, working US morning hours (Scrum). What you'll do Agent-operable system architecture • Decompose legacy monoliths into agent-readable, modular systems with strict boundaries and single responsibility • Lead incremental modernization using the Strangler Pattern, wrapping legacy logic in modern, contract-driven interfaces • Enforce SOLID principles, Dependency Injection, and Hexagonal Architecture to ensure deterministic AI execution and low regression risk Agentic framework & MCP leadership • Architect and maintain the agent context layer: standardized Skills, Rules, and Commands for AI-driven engineering workflows • Build and operate Model Context Protocol (MCP) servers exposing legacy APIs, services, and databases as typed, secure, AI-consumable tools • Own contract-first API design as the primary interface between human intent and autonomous agent execution Engineering governance & AI quality control • Act as architectural gatekeeper for AI-generated pull requests, ensuring scalability, security, and long-term maintainability • Mandate test-driven development (TDD) and characterization testing to preserve legacy behavior during refactoring • Monitor and optimize agentic reasoning loops to balance cost, speed, and architectural integrity What we're looking for • 7+ years in software architecture, platform engineering, or technical leadership • Proven experience modernizing large, undocumented legacy systems • Deep hands-on expertise with TypeScript, .NET, and Node.js • Strong background in API design, distributed systems, and modular architectures • Practical experience with agentic development, MCP, LLM tooling, or AI-assisted engineering • Bias toward clean code, deterministic systems, and production-grade AI Nice to have • Experience with remote-first or globally distributed teams • Background in SaaS transformations, scale-ups, or PE-backed environments • Comfort operating in high-ambiguity, high-ownership settings Originally posted on Himalayas