Eleventh Solutions

AI SystemsThat ExecuteReal Work

Production-grade RAG pipelines, autonomous agents, evaluation systems, and FastAPI backends. Built to run continuously, not to demo once.

Operational
Python / FastAPI / LangGraph / pgvector / PostgreSQL / Docker / Redis / Celery / SQLAlchemy / React / TypeScript / Next.jsPython / FastAPI / LangGraph / pgvector / PostgreSQL / Docker / Redis / Celery / SQLAlchemy / React / TypeScript / Next.jsPython / FastAPI / LangGraph / pgvector / PostgreSQL / Docker / Redis / Celery / SQLAlchemy / React / TypeScript / Next.jsPython / FastAPI / LangGraph / pgvector / PostgreSQL / Docker / Redis / Celery / SQLAlchemy / React / TypeScript / Next.js

Expertise

What we build

01

Production RAG Systems

Your retrieval works in demos but fails on real user queries. Precision drops, irrelevant results surface, and answer quality degrades under messy, unstructured input.

High-precision retrieval pipelines using pgvector, hybrid search (semantic + keyword), and reranking. Built for the gap between prototype retrieval and production-grade answer quality.

LangGraphpgvectorFastAPI
retrieval.py
1docs = await vector_store.similarity_search(
2 query, k=20, filter=metadata_filter
3)
4ranked = reranker.compress_documents(docs, query)
5return ranked[:top_k]
6
02

LLM Agent Infrastructure

Your agent works on the demo path but breaks when users deviate. State gets lost between steps, tool calls fail silently, and there is no way to audit what happened.

Multi-step agent workflows on LangGraph with persistent state, tool orchestration, approval gates, retry logic, and deterministic evaluation. Designed for reliability under real interaction patterns.

LangGraphClaude APICelery
agent.py
1agent = create_react_agent(
2 model=ChatAnthropic("claude-sonnet-4-20250514"),
3 tools=[search, execute, evaluate],
4 memory=PostgresMemory(conn)
5)
6result = await agent.ainvoke(task)
7
03

FastAPI Backends for AI Products

Your AI feature needs a real backend, not a notebook wrapped in an endpoint. You need async APIs, structured data access, migration discipline, and deployment automation from day one.

Production-grade API layers purpose-built for LLM-powered applications. Structured around pgvector, Alembic migrations, health checks, and operational readiness.

FastAPIPostgreSQLDocker
api.py
1@app.post("/v1/inference")
2async def inference(req: InferenceRequest):
3 async with get_session() as db:
4 result = await model.predict(
5 req.input, timeout=req.sla_ms
6 )
7 await db.log(result, latency=timer())
8 return result
9
04

AI Reliability Engineering

You are scaling prompts before you have evaluation discipline. Quality is checked by eyeballing outputs. Cost and latency are unmeasured. When something breaks in production, there is no way to tell what changed.

Deterministic evaluation frameworks, structured output validation, cost and latency observability, regression detection. The layer most teams skip between prototype and production.

PythonpytestPrometheus
eval.py
1harness = EvalHarness(
2 model=production_model,
3 fixtures=load_fixtures("qa_golden_set"),
4 metrics=[accuracy, latency_p95, cost_per_query]
5)
6report = harness.run_regression()
7assert report.pass_rate > 0.95
8

Clients

Who we build for

Startups moving past prototype

You have a working AI prototype and engineering capacity, but not a specialized AI infrastructure engineer. The system needs to handle real users and real failure modes before your next raise.

Agencies delivering AI products

You sell AI-powered solutions but need specialized backend delivery capacity. Reliable, documented, and handoff-ready.

Teams evaluating capability

The work is public. Every architectural decision and tradeoff is documented in open-source repositories. Inspect the code before the conversation.

Architecture

How the systems work

Most modern AI systems reduce to two core execution patterns: retrieval pipelines and autonomous agent loops. We design, combine, and harden these patterns to operate reliably under real-world conditions.

Production RAG Pipeline

raw docschunks[]vectorsk=20contextData SourcesPDF, API, DBChunking512 tokensEmbedding1536-dimVector StorepgvectorRerankertop_k=5LLM Generationstreaming

Agent Execution Loop

contextstorethoughtactiontool_callresponseLong-term MemorypgvectorReAct Agentclaude-sonnetObservationreflectTool Execution3 toolsOutputvalidated

Process

How we build

Every engagement follows a structured execution pipeline: from system design to production monitoring. Reliability, evaluation, and observability built in from day one.

Portfolio

Systems in Production

A selection of systems designed, built, and deployed for real-world execution. Not prototypes, not demos.

Each system reflects a specific capability: retrieval, orchestration, evaluation, or data infrastructure, engineered for reliability under production conditions.

Select a node to explore each system. Every project is open-source with full documentation.

Systems
NX
NexusRAGProduction RAG
AR
Agent RunbookAutonomous Agents
DW
Data WatchtowerData Engineering
LG
LangGraph StarterFastAPI Backends
EV
EvalOpsAI Reliability
SI
SentinelIDSecurity Systems

Why production AI is different

Demo-grade AI is easy to build. Production-grade AI is difficult to maintain.

The difference is not the model. It's the system around it.

Deterministic Evaluation

Replacing subjective "looks good" testing with measurable scoring and regression checks.

Cost Control

Preventing uncontrolled token usage through architecture, not afterthought optimization.

Latency Engineering

Designing systems that respond in real time, not seconds too late.

Operational Reliability

Building systems that continue working under load, failure, and scale.

If it cannot be measured, monitored, and trusted, it is not production-ready.

Contact

Let's build something production-grade.

Tell us about your system, your data, and what you need.

We'll respond within 24 hours with a specific technical plan.

Available for contract work