brBruno Rosa

Senior Software Engineer · Technical Lead

I build production AI systems.

Agents, RAG, and multi-provider LLM architecture — engineered with the same rigor I bring to enterprise backends: safety, cost control, and clean abstractions that survive contact with production.

About

I'm a senior software engineer and technical lead who moves fluidly across the stack — backend architecture, frontend engineering, DevOps, and cloud — with more than a decade shipping software for startups, product teams, and enterprise clients.

For the last few years my focus has been AI: designing agent architectures, retrieval pipelines, and LLM integrations that are actually safe and affordable to run at scale. I care about the unglamorous parts — PII boundaries, token budgets, audit trails, provider fallback — because that's what separates a demo from a system people can trust.

I like modernizing legacy systems, mentoring engineers, and translating between business and code. I work well with clients directly, and I hold a high bar for craft.

AI · RAG · Agents

Where I spend most of my energy now. A few of the patterns I've built into production systems:

01

Multi-provider LLM abstraction

A single interface that swaps between Anthropic, OpenAI, Azure, Gemini, and local models — with per-tenant encrypted keys, model selection per task, and graceful fallback. No lock-in, no rewrites when providers change.

02

LLM safety & cost control

PII redaction at the prompt boundary, fail-fast token-budget middleware that blocks over-limit requests before they hit the API, and an immutable audit trail logging provider, model, tokens, cost, and latency on every call.

03

Isolated agent architecture

A dedicated processing agent, separated from the API layer, so sensitive data is handled in isolation and never exposed to the application tier — a zero-PII path by design.

04

Retrieval & batch pipelines

Production LLM pipelines processing thousands of documents — structured JSON-schema output, server-side web search, batch APIs for major cost savings, and provider-agnostic orchestration with anti-misinformation gates.

05

MCP & tooling

Model Context Protocol servers and a published Claude Code skill — extending AI assistants with custom tools and reusable, shareable capabilities.

06

AI-assisted engineering discipline

Architecture Decision Records, agent instruction files, and curated runbooks that make AI-assisted development repeatable and reviewable across a team — not just a solo trick.

Selected Work

A sample across sectors. Details are kept deliberately generic to respect client and product confidentiality.

Civic-tech · data platform

Political-transparency intelligence platform

An LLM pipeline that classifies news sources, extracts structured claims from thousands of articles, and evaluates public-record data — with cost-optimized batch processing and fact-check gating.

Next.jsTypeScriptAnthropicOpenAIOllamaPostgreSQL

Construction · vertical SaaS

Multi-tenant construction-management SaaS

A vertical SaaS with an AI copilot — camera analysis, document intelligence, and streaming chat — built on a provider-abstraction layer with per-tenant budgets and PII redaction.

LaravelPHP 8.4Next.jsReactPostgreSQLRedisDocker

Data governance · SaaS

Data-quality monitoring tool

A cloud data-quality service with a dedicated processing agent isolated from the API, ensuring sensitive records are analyzed without ever crossing into the application layer.

GoLaravelNext.jsPostgreSQLRedis

Energy · enterprise BI

Utility-sector analytics dashboards

Enterprise business-intelligence dashboards and data integrations for a large energy utility — embedding analytics into operational tooling for non-technical stakeholders.

Power BIDatabricksLaravelVueSQL

Fintech · payments

Access-control & data-quality frameworks

Role-based access control, permission-driven UI, and data-quality frameworks for a global payments organization — with security hardening and enterprise UAT.

ReactTypeScriptLaravelRBAC/ACLPostgreSQL

Invoicing · SaaS

Electronic-invoicing platform

A multi-tenant electronic-invoicing platform integrating with tax-authority systems — certificate management, XML storage, quotas, and subscription handling.

AdonisJSNode.jsNext.jsPostgreSQLMinIODocker

Client and product names withheld by design.

Skills

AI / LLM

  • Anthropic Claude
  • OpenAI
  • Azure / Gemini
  • Ollama (local)
  • RAG & retrieval
  • Agents & MCP
  • Prompt & schema design
  • Batch APIs

Backend

  • Laravel / PHP
  • Python / FastAPI
  • Go
  • Node.js / AdonisJS
  • REST APIs
  • Database design

Frontend

  • React
  • Next.js
  • Vue 2 → 3
  • TypeScript
  • Angular / Ionic
  • Tailwind CSS

Data & BI

  • PostgreSQL / MySQL
  • Power BI
  • Databricks
  • Alteryx
  • MicroStrategy
  • Data pipelines

DevOps & Cloud

  • Docker
  • CI/CD
  • Linux
  • Redis
  • n8n automation
  • Deployments

Security & Quality

  • CVE remediation
  • Dependency audits
  • RBAC / ACL
  • LGPD / privacy
  • Code review
  • Legacy modernization

Experience

  1. AI Engineer · Independent Product Builder

    Own SaaS ecosystem

    Recent

    • Designed and shipped multiple multi-tenant SaaS products with AI copilots and agent architectures.
    • Built a reusable multi-provider LLM layer with per-tenant keys, budgets, PII redaction, and audit logging.
    • Published a Claude Code skill and built Model Context Protocol tooling.
  2. Senior Software Engineer · Technical Consultant

    Enterprise data & analytics consultancy

    Multi-year

    • Delivered enterprise BI, dashboards, and web applications for clients in payments, energy, and public infrastructure.
    • Led Laravel version migrations and Vue 2 → 3 upgrades; remediated security findings and CVEs.
    • Built RBAC/ACL systems and data-quality frameworks; ran enterprise UAT and sprint planning.
  3. Full-Stack Engineer · Product & Agency Work

    E-commerce, fintech, edtech, mobile

    Earlier

    • Built product ecosystems spanning e-commerce, invoicing, and business operations.
    • Shipped cross-platform mobile apps and integrated payment, tax, and ERP systems.
    • Modernized legacy stacks toward maintainable, well-tested architectures.

Let's talk

Looking for someone who can take AI from prototype to production — safely, and at a sensible cost? I'd love to hear about it.