Full-Stack Engineer - Agentic AI Platform - AWS Professional ServicesLocation: Chantilly, VA (preferred)
Work Type: Onsite / Hybrid
Citizenship: U.S. Citizenship required
Clearance:Active TS/SCI (CI Poly preferred but not required)Certification: Active Security+ or equivalent requiredThe OpportunityThis is much more than traditional web development. You'll own the end-to-end user experience for live AI agent execution, from the React/Next.js interface through the APIs and streaming event pipelines that support it.
You'll work on challenges such as real-time agent activity, durable chat state, notifications, tool-call visualization, artifacts, lineage, and trace exploration. The environment is highly distributed and stateful, so solving problems around latency, event ordering, reconnection, partial state, and optimistic updates is a major part of the role.
The AI scientists own the underlying models and evaluations. Your job is to build the production engineering layer that makes those AI capabilities usable, observable, reliable, and secure.
If you enjoy full-stack engineering, real-time systems, and working directly with emerging AI technologies in a mission environment, this is a strong fit.
What You'll Be Doing - Design and build production applications using TypeScript, React, and Next.js
- Own the full vertical stack from React components through APIs and backend services
- Build real-time interfaces using Server-Sent Events (SSE), WebSockets, and streaming architectures
- Develop user experiences for live agent execution and AI-driven workflows
- Build and maintain durable chat state and notification architectures
- Develop interfaces for tool calls, artifacts, lineage, and agent execution traces
- Handle complex application behaviors including event ordering, reconnection, partial state, and optimistic updates
- Build and operate backend services and APIs using technologies such as FastAPI and Node
- Diagnose issues across the full application stack using logs, traces, and telemetry
- Build automated unit and end-to-end testing into the development process
- Work with distributed tracing technologies such as OpenTelemetry
- Use AI coding assistants as part of the daily development workflow while validating generated code through testing and engineering review
- Collaborate with AWS engineers, AI specialists, and customer stakeholders in a secure mission environment
What We're Looking ForFull-Stack Development - 3+ years of professional software development experience
- Strong experience with TypeScript
- Experience building production applications using React and/or Next.js
- Experience developing backend services and APIs using FastAPI, Node, or similar technologies
- Ability to troubleshoot issues across the entire application stack
Real-Time & Streaming Applications - Experience building real-time or streaming interfaces
- Experience with Server-Sent Events (SSE), WebSockets, or equivalent technologies
- Understanding of reconnection, event ordering, and partial-state challenges
- Experience with client/server state management and optimistic-update patterns
AI / Agentic Systems - Experience or exposure to AI/agentic applications
- Familiarity with long-running AI workflows and token-by-token streaming
- Experience or interest in building interfaces for tool calls, agent runs, traces, and artifacts
- Comfortable working with systems utilizing LLMs, AWS Bedrock, MCP tools, and agent-based architectures
Testing & Observability - Experience with automated unit and end-to-end testing using technologies such as Jest and Playwright
- Experience diagnosing defects using logs, telemetry, and traces
- Familiarity with OpenTelemetry or other distributed tracing platforms
- Strong engineering mindset around testing, verification, and evidence-based troubleshooting
Security - Active TS/SCI clearance (CI Poly preferred but not required)
- Active Security+ or equivalent certification
- Comfortable developing applications in secure, regulated, and classified environments
Preferred - Bachelor's degree in Computer Science or equivalent practical experience
- Experience building interfaces for AI, agentic, or other streaming distributed systems
- Experience using AI coding assistants as part of a professional development workflow
COMPENSATION & BENEFITS SBS offers a comprehensive total-rewards package, including a market competitive salary along with:
- Comprehensive medical, dental, and vision coverage; HSA-eligible plan options available
- 401(k) retirement plan with company match (vesting schedule per Plan Document)
- Paid Time Off, federal holidays, and floating holiday for personal observance
- Annual professional development support for AWS certifications, training, and conferences
- Employee referral program where applicable and documented by program policy
- Life, AD&D, and short- / long-term disability insurance
- Telework and flexible-schedule support where mission and contract permit
- Mission-focused federal contractor supporting national-security customers
Target Salary Range: $180,000-270,000. This range reflects the anticipated compensation for this role. Actual salary will be based on a combination of factors, including the position's scope and level of responsibility, the candidate's relevant experience, education, technical expertise, skills and qualifications, geographic location, and applicable business or contractual requirements.
