Babel Street
Sr. Director of Engineering - API
$220K–$240K
Reston, VA, United States +2 · Director · Full-time · Posted Oct 22, 2026
- Location
- Reston, VA, United States
Reston, Virginia, United States
Somerville, Massachusetts, United States - Experience
- 10+ years; experience at Principal Engineer or Staff+ level.
About the job
Leads the strategy and hands-on delivery of Babel Street’s API and Model Context Protocol platform to support developers, AI agents, and agent-driven intelligence workflows.
What you'll do
- Define API and MCP strategy, standards, governance, and implementation patterns.
- Design and deliver semantic, agent-ready APIs and context-aware service frameworks.
- Lead cross-team adoption, mentor engineers, and partner with Architecture, AI, Data, Platform, and vendors.
What they ask for
- 10+ years of software engineering experience.
- Experience operating at Principal Engineer or Staff+ level.
- Strong hands-on experience building distributed systems and API-first platforms.
- Experience with cloud-native architectures, developer platforms or service-oriented architectures, and leading cross-team technical initiatives.
Nice to have
- Hands-on GCP; familiarity with Vertex AI Agent Engine, ADK, LangChain, or MCP.
- Experience with semantic APIs, context or memory systems, agent architectures, BigQuery, Snowflake, Apigee, or Anti-Gravity.
Pay
$220,000—$240,000 USD (base salary)
Tools
GCP, Vertex AI Context Caching, Vertex AI Agent Engine, ADK, LangChain, BigQuery, Snowflake, Apigee
AI focus
Builds AI-native, agent-driven platform capabilities, including MCP integrations, semantic APIs, agent workflows, and context-aware services.
Model-written summary · the original posting is authoritative