Principal Engineer: AI-Ready API & MCP Platform

Hatchit; Reston (VA); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Babel Street is seeking a Principal Engineer to lead API‑first platform strategy and MCP integration, delivering semantic APIs and context‑aware services for agent‑driven workflows.

You will partner with Architecture, AI, Data, and Platform teams to ensure scalable, discoverable APIs that power next‑gen intelligence solutions. Hybrid role based in Reston, VA or Somerville, MA with potential for remote work.

Qualifications

• 10+ years of software engineering experience.
• Experience operating at Principal Engineer or Staff+ level.
• Strong hands‑on experience building distributed systems.
• Experience designing and building API‑first platforms.
• Experience with cloud‑native architectures (GCP preferred).
• Experience building developer platforms or SOA.
• Strong system design and architectural thinking.

Responsibilities

• Partner with Architecture to define and lead Babel Street’s API and MCP platform strategy.
• Design and deliver semantic, agent‑ready APIs.
• Establish MCP standards and implementation patterns.
• Define context management patterns for agent workflows.
• Partner with AI and Data teams to enable agent‑native architectures.
• Establish API governance and platform standards.
• Build foundational frameworks and reusable components.
• Provide hands‑on technical leadership and mentorship.
• Drive adoption of API and MCP standards across engineering teams.

Skills

Distributed systems

API‑first platforms

Architectural thinking

Cross‑functional leadership

Cloud‑native architectures

Tools

GCP

Vertex AI

APIs

Job description

Babel Street is seeking a Principal Engineer to lead API‑first platform strategy and MCP integration, delivering semantic APIs and context‑aware services for agent‑driven workflows.

You will partner with Architecture, AI, Data, and Platform teams to ensure scalable, discoverable APIs that power next‑gen intelligence solutions. Hybrid role based in Reston, VA or Somerville, MA with potential for remote work.