Agentic Systems Engineer – TypeScript, .NET, MCP

Work Life Group

. Transform a 10+ year legacy codebase into a high-velocity, agent-operable architecture .

Posted 10/24/2026full-timeRemote • MoldovaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in modernizing legacy systems through architectural leadership, focusing on agentic development, API design, and modular architectures. Proficient in implementing SOLID principles and test-driven development to ensure high-quality, maintainable code.

Highest-signal resume keywords

Software ArchitectureTypeScriptAPI DesignAgentic DevelopmentTest-Driven Development

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Hard Skills

Software ArchitectureTypeScriptNode.js.NETAPI DesignModular ArchitectureTest-Driven DevelopmentLegacy System ModernizationAgentic DevelopmentHexagonal Architecture

Soft Skills

Technical LeadershipCollaborationProblem-SolvingAdaptabilityCommunication

Tools & Technologies

Model Context ProtocolAI-Generated Pull RequestsContract-Driven InterfacesDistributed SystemsLegacy APIs

Industry Keywords

SaaS TransformationsPE-Backed EnvironmentsHigh-Ambiguity SettingsRemote-First TeamsScrum

Tech Stack

Tools & technologies

Distributed SystemsJavaScriptNode.jsTypeScript.NET

About the role

Key responsibilities & impact

Transform a 10+ year legacy codebase into a high-velocity, agent-operable architecture
Decompose legacy monoliths into agent-readable, modular systems with strict boundaries and single responsibility
Lead incremental modernization using the Strangler Pattern and contract-driven interfaces
Enforce SOLID principles, Dependency Injection, and Hexagonal Architecture
Architect and maintain the agent context layer with standardized Skills, Rules, and Commands
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 between human intent and autonomous agent execution
Act as architectural gatekeeper for AI-generated pull requests
Mandate test-driven development (TDD) and characterization testing during refactoring
Monitor and optimize agentic reasoning loops for cost, speed, and architectural integrity

Requirements

What you’ll need

4+ 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
Experience with remote-first or globally distributed teams (nice to have)
Background in SaaS transformations, scale-ups, or PE-backed environments (nice to have)
Comfort operating in high-ambiguity, high-ownership settings (nice to have)
Ability to work US morning hours (Scrum)

Benefits

Comp & perks

High ownership, flexibility and impact
Growth pathways across engineering, product and leadership
Remote-first work arrangement
Work across multiple products and technologies