BLEN, Inc.

​Founded in 2004, BLEN, Inc. is a Washington, DC-based technology firm specializing in building cutting-edge software solutions and mobile applications. As an

AI Engineer

Location

Washington

Posted

24 days ago

Salary

$130K - $150K / year

Seniority

Senior

Job Description

AI Engineer

BLEN, Inc.

• Design and build agentic systems — multi-step agents that plan, call tools, retrieve context, and take action with appropriate human-in-the-loop checkpoints • Build MCP servers and clients to securely expose client data, internal tools, and APIs to LLMs in a standardized, auditable way • Ship LLM-powered applications: copilots, document intelligence, search, summarization, and workflow automation • Design and maintain RAG pipelines — chunking, embeddings, vector stores, retrieval, reranking, and grounding • Integrate model APIs (OpenAI, Anthropic, Bedrock, Azure OpenAI, open-weight models) and pick the right model for the job based on quality, latency, and cost • Develop evals and observability for agents and AI features so we know what's working in production and what's regressing • Apply prompt engineering, structured outputs, function/tool calling, and guardrails to make agent behavior predictable • Write production Python backends and APIs that expose AI capabilities to web and mobile clients • Collaborate with engineers, designers, and product folks to scope what AI should (and shouldn't) do in a given product • Help shape responsible AI practices for federal use — privacy, security, auditability, and human oversight

Job Requirements

  • 5+ years of professional software engineering experience, with at least 1 year shipping LLM-based or AI-powered features to production
  • Hands-on experience designing or building agentic systems — tool calling, multi-step reasoning, planning loops, or agent orchestration (LangGraph, CrewAI, OpenAI Agents SDK, Claude tool use, or equivalent)
  • Working knowledge of the Model Context Protocol (MCP) — or demonstrated ability to pick it up quickly, plus familiarity with the broader landscape of agent/tool standards
  • Strong Python and experience building and deploying backend services and APIs (FastAPI, Flask, or similar)
  • Hands-on experience with at least one major LLM provider (OpenAI, Anthropic, Bedrock, Azure OpenAI, Vertex, or open-weight models via vLLM/Ollama)
  • Working knowledge of RAG: embeddings, vector databases (pgvector, Pinecone, Weaviate, Qdrant, or similar), and retrieval evaluation
  • Comfort with prompt engineering, structured outputs (JSON mode, schemas), and tool/function calling
  • Experience writing evals — even lightweight ones — for non-deterministic systems
  • Solid SQL and experience with relational and unstructured data
  • Familiarity with at least one cloud platform (AWS, Azure, or GCP)
  • Git, code review, and modern collaborative workflows
  • Strong written and verbal communication — you can explain AI tradeoffs to non-technical stakeholders.

Benefits

  • Competitive pay
  • Contribution toward health benefits
  • Work from anywhere in the US
  • High-visibility federal projects with real impact
  • Small team where your ideas actually ship
  • Generous exposure to the latest AI tooling and models

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