Density Labs / Practices / Software Development

Engineering that ships.

Senior engineers from LATAM, embedded into your team via The Density Method. AI engineering is the wedge. The full stack and infrastructure underneath are why the wedge actually lands.

What we build

AI engineering. Plus the rest of the stack.

The AI work is new. The shipping discipline is not. Since 2016, we have shipped Rails, React, Node, Python, React Native, and cloud infrastructure for mid market US product teams.

AI Engineering

Production AI features inside real products.

RAG systems wired into existing codebases. Agent architectures with eval infrastructure. LLM workflows that survive real users. Observability, fallbacks, and the unglamorous reliability work.

RAG · Agents · Evals · MLOps · LLM UX
Full Stack Engineering

The product engineering work that already worked.

Web and mobile, frontend and backend, the whole loop. Same engineers that ship AI features ship the surrounding product. No hand offs between specialties.

Rails · React · Node · Python · React Native
Cloud Infrastructure

The boring foundations AI features need.

Inference infrastructure, queues, vector stores, edge functions, CI/CD, cost monitoring. The plumbing that turns demos into systems your team can run on Monday.

AWS · GCP · Cloudflare · Terraform · Docker
How we engage

One framework. Every engagement.

The Density Method is the operating system that runs every placement. Four phases, each with measurable exit criteria.

01
Diagnose
2 weeks · fixed
Paid written diagnostic. Capability gap analysis, architecture audit, 90 day plan. Yours to keep regardless of what comes next.
02
Match
7–10 days
Two to three vetted candidates from a 2% acceptance pool. You meet them, you decide. No body shopping.
03
Embed
30 / 60 / 90
Structured 30/60/90 plan with weekly tech lead 1:1s, monthly architecture review, and AI playbook access.
04
Retain
Multi-year
The years long arc that makes operational density compound. Tenure is the input. Compounding context is the output.
Read how the Method works →
By the numbers

A decade of shipping.

Not a pitch. The actual numbers, drawn from the engagements we are running today.

96%
Client retention
100%
Success rate · 6 yrs
120 day
Replacement guarantee
7–10
Days to match
Stack

What our engineers actually run.

The languages, frameworks, and infrastructure our team has shipped in production. Not a list of buzzwords, things we have on the bench right now.

Layer
Production capabilities
AI / ML
OpenAI · Anthropic · LangGraph · pgvector · Pinecone · Weaviate · Custom evals
Backend
Ruby on Rails · Node.js · Python · FastAPI · Postgres · Redis
Frontend
React · Next.js · TypeScript · Tailwind · Streaming UIs
Mobile
React Native · Native bridges · App Store / Play deployment
Infrastructure
AWS · GCP · Cloudflare · Terraform · Docker · GitHub Actions
Observability
Datadog · Sentry · OpenTelemetry · Custom eval dashboards

Need senior engineers that actually ship?

30 minutes. No deck. We figure out together whether the work is real and whether we are the right partner.

Book a 30 min call →