Reston, VA, United States; Somerville, Massachusetts, United States Hybrid Employment $220,000 - $250,000

Babel Street is hiring a Principal Engineer, API & MCP Platform

Requirements

  • 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 service-oriented architectures.
  • Strong system design and architectural thinking skills.
  • Proven ability to lead cross-team technical initiatives.
  • Hands-on work with Google Cloud Platform (GCP).
  • Understanding of the Model Context Protocol (MCP).
  • Experience managing context or building memory systems.

Nice to Have

  • Familiarity with Vertex AI Agent Engine.
  • Background in ADK and reasoning frameworks such as LangChain.
  • Exposure to data warehouse technologies like BigQuery and Snowflake.
  • Knowledge of Apigee or similar API gateway solutions.
  • Proven ability to design semantic APIs for AI or agent-driven use cases.
  • Development of agent-based architectures or orchestration frameworks.
  • Exposure to Anti-Gravity.

Benefits

  • Health Benefits: Babel Street covers 85-100% monthly premium costs for Medical, Dental, Vision, Life & Disability insurances – for you and your family!
  • Retirement Plans: Babel Street offers both a Traditional and Roth 401(K) with a very competitive match.
  • Unlimited Flexible Leave: We trust our employees to manage their own time and balance their personal and work lives.
  • Holidays: Babel Street provides employees with 12 paid Federal Holidays.
  • Tuition Reimbursement: We are committed to investing in our employees. One way we do that is with our Tuition Reimbursement Program for continuing education.

Additional Information

  • Babel Street is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. Further, Babel Street will not discriminate against applicants for inquiring about, discussing or disclosing their pay or, in certain circumstances, the pay of their co‐worker, Pay Transparency Nondiscrimination. In addition, Babel Street's policy is to provide reasonable accommodation to qualified employees who have protected disabilities to the extent required by applicable laws, regulations and ordinances where a particular employee works. Upon request, we will provide you with more information about such accommodations.
Required Skills
cloud-native architecturesVertex AI Agent Engine.Apigee or similar API gateway solutions. cloud-native architecturesVertex AI Agent Engine.Apigee or similar API gateway solutions.
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About company
Babel Street

Babel Street is the global leader in mission-grade risk intelligence. We help governments, businesses, and organizations anticipate threats, protect people, and safeguard operations with AI-powered clarity. Every feature we build, every decision we make, is anchored in the mission of those who protect people.

What sets us apart is scale, precision, and responsibility. Scale — Our platform ingests billions of records across languages, domains, and regions, delivering always-on global coverage. Precision — AI that is tailored to fit your mission transforms complexity into clear, explainable intelligence—from entity resolution and risk scoring to event detection and network mapping. Responsibility — We build ethical, compliant, and transparent AI that augments human decision-making, ensuring safety and accountability at every step.

Founded in 2009, Babel Street has grown into a trusted partner to defense, intelligence, law enforcement, and regulated industries worldwide. From identity and vendor vetting to situational awareness and threat intelligence, our solutions deliver decision advantage when speed and precision matter most.

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Posted a day ago