Sr. Director of Engineering - API
- Pay
- $220,000 – $240,000 per year
- Location
- Reston, VA · On-site
- Job type
- Full-time
- Level
- Executive
- Education
- Bachelor's degree
- Listed
- 18 days ago
Skills & highlights for this role
- API design and development
- Technical leadership
- Platform architecture
Also useful
- Model Context Protocol (MCP)
- AI agent integration
- Semantic APIs
- Identity intelligence or risk analytics domain experience
Role Summary
We are seeking a Principal Engineer to lead Babel Street's API and MCP platform strategy and delivery as we evolve toward an AI-native, agent-driven platform.
This is a hands-on, senior technical leadership role responsible for defining and delivering API-first platform capabilities that enable both developers and AI agents to interact with Babel Street's services. You will lead the design and implementation of semantic APIs, Model Context Protocol (MCP) integrations, and context-aware service patterns that power next-generation intelligence workflows.
This role requires a finger-on-keyboard engineer who can both define direction and deliver foundational systems. You will partner closely with AI, Data, and Platform teams to ensure Babel Street's APIs and services are consistent, discoverable, scalable, and optimized for agentic workflows.
You will work in close partnership with the Architecture function to align on long-term technical direction, ensuring API and MCP platform decisions are consistent with the company's broader architectural vision while maintaining a strong focus on execution and delivery.
This is a hybrid role working out of either our Reston, VA or Somerville, MA office. Full remote may be considered.
Why This Role Matters
This role will be instrumental to Babel Street's AI-native technology strategy. The API and MCP platform will serve as the interface layer between data, AI, and product capabilities, enabling agents, developers, and systems to interact seamlessly.
This is a high-impact, senior technical leadership role with broad influence across the organization and the opportunity to shape the future of Babel Street's platform. The position spans four core domains:
API Platform & Strategy
You will define and lead Babel Street's API-first platform strategy, establishing consistent patterns for service design, versioning, discoverability, and governance.
You will help evolve the platform toward agent-ready APIs, ensuring services are consumable by both human developers and AI agents. You will establish standards for API consistency, reliability, and performance across the organization.
You will also work closely with product and engineering teams to ensure APIs are designed as first-class platform capabilities, not just service interfaces.
MCP & Agent Integration
You will lead Babel Street's Model Context Protocol (MCP) strategy and implementation, enabling agents and AI systems to interact with services in a standardized and scalable way. This includes defining patterns for:
- MCP service exposure
- Tool and service discovery
- Agent-to-service communication
- Context-aware interactions
You will partner closely with AI and platform teams to enable agent-native workflows across the organization.
Semantic APIs & Agent-Ready Interfaces
You will lead the design of semantic, agent-friendly APIs, where documentation becomes a first-class interface for AI-driven systems. This includes defining standards for:
- API descriptions optimized for agents
- Schema consistency and semantic modeling
- Tool and service discoverability
- API documentation optimized for agent consumption
You will establish best practices for documentation-as-code, ensuring APIs are designed for both developers and AI systems.
You will define patterns for context-aware APIs and services, including
- Context management and retrieval
- Context caching
- Session and state management
- Memory-aware service interactions
You will help design scalable context-aware systems leveraging technologies such as Vertex AI Context Caching and related frameworks.
Key Responsibilities
- Partner closely 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
- Partner with Google and other vendors on platform capabilities
- Drive adoption of API and MCP standards across engineering teams
Required 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 service-oriented architectures
- Strong system design and architectural thinking skills
- Proven ability to lead cross-team technical initiatives
Preferred Qualifications
- Hands-on work with Google Cloud Platform (GCP)
- Familiarity with Vertex AI Agent Engine
- Background in ADK and reasoning frameworks such as LangChain
- Understanding of the Model Context Protocol (MCP)
- 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
- Experience managing context or building memory systems
- Development of agent-based architectures or orchestration frameworks
- Exposure to Anti-Gravity
- What Success Looks Like
- 30 Days
- Assess current API and platform architecture
- Define API and MCP platform strategy
- Identify early opportunities for standardization
60 Days
- Deliver initial platform frameworks and standards
- Begin rollout of semantic API patterns
- Establish MCP integration approach
90 Days
- Agent-ready APIs in production
- MCP-enabled services deployed
- Clear platform standards adopted across teams
- Measurable improvement in API consistency and developer velocity
Benefits
Benefits at Babel Street (just to name a few...):
- 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.
Range for this position based on qualifications and experience $220,000—$240,000 USD
About Babel Street
Babel Street is the trusted technology partner for the world's most advanced identity intelligence and risk operations. We deliver advanced AI and data analytics solutions providing unmatched, analysis-ready data regardless of language, proactive risk identification, 360-degree insights, high-speed automation, and seamless integration into existing systems.
Babel Street empowers government and commercial organizations to transform high-stakes identity and risk operations into a strategic advantage. The actionable insights we deliver safeguard lives and protect critical assets around the world. Babel Street is headquartered in Reston, Virginia, with regional offices in Boston, MA and Cleveland, OH, and international offices in Australia, Canada, Israel, Japan, and the U.K.
Equal opportunity and legal notices
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.
From Babel Street's careers page, first listed on Rolev.ai on October 22, 2026. Rolev.ai is not the employer.
How Rolev.ai helps with this application
Rolev.ai is a job search and application tool for US job seekers. For this Sr. Director of Engineering - API role at Babel Street, it shows how your resume fits, tailors your resume to the posting, and prepares the application for you to review.
See how you fit
Openings from employer career sites are ranked against your whole resume—and searchable inside Claude, ChatGPT, and Cursor via Rolev.ai MCP.
Tailor without inventing
Every change to your resume is checked against your original. New experience goes in only with your yes—zero fabricated claims.
Draft the full kit
Tailored and Full Match resumes, role-specific cover letters, and answers to employer screening questions are prepared in seconds.
1-Click Extension Autofill
The Chrome extension fills the employer's Greenhouse, Workday, Lever, or Ashby form in 1 click. You review it and press Submit.
Common questions
What is the salary for the Sr. Director of Engineering - API role at Babel Street?
The Sr. Director of Engineering - API posting at Babel Street states compensation of $220,000 – $240,000 per year. It is listed as a full-time position. Final pay may depend on location, experience, and interview evaluation on Babel Street's official career site.
Where is the Sr. Director of Engineering - API job at Babel Street located?
This Sr. Director of Engineering - API position at Babel Street is located in Reston, VA (On-site). Always check Babel Street's application page for specific state eligibility or relocation policies.
What qualifications are required for Sr. Director of Engineering - API at Babel Street?
For the Sr. Director of Engineering - API role, Babel Street highlights a bachelor's degree; experience with API design and development, Technical leadership, Platform architecture. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Sr. Director of Engineering - API position at Babel Street?
This listing links directly to Babel Street's Greenhouse application page. You can apply directly on Babel Street's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Greenhouse application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.