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Mario Alexandre — AI Systems Engineer
Engineering Consultant — DLux Digital

AI systems
that run
your business.

Mario Alexandre — production AI systems and automation infrastructure built to engineering standards. Not prototypes. Not demos. Systems that handle real money and real clients without supervision.

BSEE · University of South Florida 7 yrs Electrical · Luanda, Angola Tampa, FL EN / PT / ES
Explore 22 Services Book a Discovery Call
// Built On
Claude API OpenAI Python FastAPI n8n Stripe PostgreSQL AWS ElevenLabs Whisper vLLM MCP
// The Background

Engineering is engineering. The scope just keeps getting bigger.

Before I wrote my first line of Python, I spent seven years designing electrical systems for commercial buildings in Luanda, Angola — the kind of work where a mistake means a building goes dark. That taught me how to think about systems: redundancy, fault tolerance, making things work under constraints most engineers never face.

When I came to the US to formalize that knowledge with a BSEE from the University of South Florida, I discovered the same engineering discipline applies to an entirely different kind of system. Software. AI. Automation. The medium is different — code instead of copper — but the method is identical: architect the system, build it to production grade, make it reliable enough that your business can depend on it.

Today I run DLux Digital, building production AI systems for companies whose operations need to work without constant oversight. Real money, real clients, no prototypes. Every system documented, monitored, and handed over — you own it.

7+
Years EE — Angola
83K+
Lines Production Python
500+
Transcripts Processed
99%
Pipeline Reliability
22
Production Services

Industries I Build For

// Where I've Shipped

Every industry has its own friction profile. These are the verticals where I've shipped production systems and understand the operational realities — billing models, regulatory edges, common stack, where the labor really goes.

// 01

Coaches & Course Creators

Content extraction from Zoom recordings, gated course delivery, payment-to-CRM bridges. Real example: client with 55+ hrs/mo of unclipped coaching gold.

// 02

Real Estate & Hospitality

Lead qualification, dynamic pricing tooling, calculator pages, Airbnb operations automation. Built for high-volume listing operators.

// 03

Agencies & Service Firms

Outbound sales automation, AI proposal generation, sales call analyzers. Replaces SDR seats and lifts close rates.

// 04

Government & Enterprise

Multilingual deployments (EN/PT/ES), document intelligence at scale, compliance-grade audit trails. Lusophone-Africa specialty.

// 05

SaaS & Technology

Custom MCP servers, self-hosted LLM stacks, AI knowledge agents. For teams who need their AI to actually do things — not just describe them.

// 06

Regulated Industries

Healthcare, fintech, legal: GDPR/HIPAA/SOC 2 monitoring, audit-ready logs, on-prem LLM deployment. Engineering-grade compliance.

Core Automation Services

01 – 05 / 22
Small Business Essentials
01

AI Voice
Receptionist

Answers every call 24/7, books appointments in real time, and handles customer inquiries with zero humans involved. Custom voice cloning makes it sound like your business.

Dentists, salons, law firms, clinics, HVAC. Clients paying $3K+/mo for a front desk that still puts callers on hold.

$3K–$5K build
+ $300–$500/mo
2–4 hours
Retell AI / VapiElevenLabsGoogle Calendar API
02

AI Review
Manager

Monitors every Google review in real time, auto-responds to positive ones, flags negatives for the owner, and sends review requests to happy customers automatically.

Restaurants, gyms, chiropractors, auto shops — any business whose revenue depends on their Google rating.

$500–$1,500 build
+ $200–$500/mo
1–2 hours
n8nGoogle Business APIClaude API
03

AI Lead
Qualifier

Website chatbot live 24/7. Engages every visitor, asks qualifying questions, captures contact info, and books serious buyers directly onto the calendar.

Real estate agents, coaches, consultants, agencies. Anyone losing leads at night because nobody's there to respond.

$5K–$8K build
+ $500–$1K/mo
4–8 hours
Voiceflow / BotpressClaude APICalendlyHubSpot
04

AI Ad Creative
Pipeline

Scrapes competitor ads daily, identifies winning hooks, and generates 50–100 ad variations with scripts, images, and voiceovers — in an afternoon instead of a month.

Ecom brands, DTC companies, marketing agencies currently paying $5K–$15K/mo to creative agencies for the same output.

$1K–$3K/mo
per brand
One weekend
ClaudeMidjourneyRunwayElevenLabsCron job
05

AI Sales Call Analyzer

Auto-transcribes every sales call, analyzes for objections, winning phrases, and drop-off points. Grades each rep's performance and pushes a coaching summary straight to Slack or the CRM.

B2B sales teams, agencies, real estate brokerages, car dealerships. Any business that knows bad calls are costing them money but can't review every recording.

$2K–$4K build + $300–$800/mo
4–8 hours
Whisper / FirefliesClaude APIn8nSlack / CRM integration

Engineering-Grade Services

06 – 12 / 22
Senior Engineer Differentiators
06

AI Document
Intelligence

Extracts, classifies, and routes data from invoices, contracts, intake forms, and PDFs. Reduces manual document review by 80%+ and eliminates transcription errors at scale.

Legal firms, insurance companies, healthcare practices, logistics. Any operation drowning in unstructured documents.

$8K–$20K build
+ $500–$1.5K/mo
1–2 weeks
Claude APIAWS Textractn8n / MakePostgreSQL
07

Predictive
Analytics

Custom ML pipelines that forecast churn, inventory demand, revenue, or fraud from your actual business data. Dashboards that tell you what's going to happen — not just what happened.

E-commerce, SaaS, fintech, and any data-rich business whose decisions are still based on last month's spreadsheet.

$10K–$30K build
+ $1K–$2K/mo
2–4 weeks
Python / scikit-learnMetabase / SupersetdbtSnowflake / BigQuery
08

AI Compliance & Audit Automation

Continuous monitoring for GDPR, HIPAA, SOC 2, or CCPA — logging every action, flagging violations in real time, generating audit-ready reports on demand. Built for regulated industries where a manual audit costs $50K+.

Healthcare, fintech, legal, HR tech. Any business facing regulatory scrutiny that currently handles compliance manually.

$15K–$40K build + $2K–$5K/mo
3–6 weeks
PythonClaude APIDatadog / SplunkPostgreSQLCustom audit APIs
09

Edge AI
Deployment

On-device LLM and ML inference for Jetson, Raspberry Pi, NPU, and mobile. Privacy-first, zero API cost after deployment, runs offline. Hardware-aware quantization and thermal/power budgeting.

Privacy-sensitive industries, factory floors, vehicles, retail kiosks, anywhere data shouldn't leave the device or connectivity is unreliable.

$8K–$25K build
+ $300–$800/mo
2–5 weeks
ONNX / TFLiteLlama.cpp / vLLMJetson / RPiQuantization (INT4/INT8)
10

Custom MCP
AI Tool Servers

Build Model Context Protocol servers giving Claude, GPT, or any LLM authenticated access to private tools, internal databases, and proprietary APIs. Your AI gets real hands instead of just hallucinated answers.

SaaS companies, internal AI initiatives, product teams who want their LLM to actually do things — not just describe doing them.

$4K–$10K build
+ $300–$700/mo
1–2 weeks
MCP SDK (TypeScript / Python)FastAPISSE / WebSocketOAuth / JWT
11

Self-Hosted
LLM Stack

Private Ollama or vLLM deployment on client GPU (or rented Hostinger / RunPod / Hetzner). Zero per-token cost, zero data leakage, full model selection — Qwen, Llama, Mistral, DeepSeek. Includes nginx, auth, monitoring.

Companies hitting 5-figure monthly OpenAI bills, regulated industries that can't send data to third parties, anyone hitting rate limits.

$6K–$18K build
+ $400–$1K/mo
1–3 weeks
vLLM / OllamaQwen / Llama / Mistralnginx + CaddyPrometheus / Grafana
12

AI System Audit & Reliability Engineering

When an existing AI system "works in demos but fails in production," I run a BSEE-grade audit: monitoring coverage, error budgets, edge-case behavior, drift detection, fallback paths, cost analysis. Deliverable is a written report with prioritized fixes — and an SOW for the rebuild if you want it done.

Companies with existing AI systems that mysteriously break, hallucinate in production, blow past budgets, or work in dev but not in scale. Every "AI agency" ships demos. Few engineer for production.

$3K–$8K flat audit
(rebuild SOW separate)
3–7 days
Written reliability report · Failure-mode catalog · Monitoring gap analysis · Remediation roadmap with effort estimates

Growth & Operations

13 – 21 / 22
High ROI · Fast to Ship
13

Internal AI
Knowledge Agent

A company's internal AI that answers employee questions using their actual docs, SOPs, Notion pages, and Confluence. No more pinging colleagues for answers that are already written down somewhere.

Mid-size companies with growing teams, onboarding friction, and institutional knowledge locked in siloed docs.

$5K–$12K build
+ $400–$800/mo
3–5 days
Claude APIPinecone / WeaviateNotion / Confluence APISlack bot
14

AI Proposal
Generator

Client fills out a qualification form, AI builds a fully customized, branded proposal with scope, pricing, and timeline — delivered in minutes instead of hours. Closes deals faster.

Agencies, contractors, consultants, architects, IT service firms — anyone spending 2–4 hours per proposal on copy-paste work.

$3K–$6K build
+ $200–$400/mo
1–3 days
Claude APITypeform / TallyGoogle Docs APIn8n
15

Content Extraction
Pipeline

Your best content is rotting on a hard drive. AI watches every Zoom recording, podcast, or workshop, identifies the moments that stop a scroll — emotional peaks, framework drops, contrarian takes — clips them, formats them, queues them for posting. Your content calendar fills itself from material that already exists.

Coaches, founders, podcasters, creators sitting on hours of recorded gold. Anyone whose bottleneck is extraction, not creation.

$4K–$10K build
+ $500–$1.5K/mo
1–2 weeks
WhisperClaude (semantic scoring)ffmpegBuffer / Hypefury / Make
16

SEO Article
Pipeline

Automated content factory: keyword research → article generation with Schema.org structured data → editorial pass → publish to CMS → submit to Google Search Console. SEO-graded output at scale, not slop.

Brands losing organic traffic to faster competitors. Agencies servicing content clients. Anyone whose blog hasn't grown in 6 months.

$5K–$15K build
+ $500–$2K/mo
1–3 weeks
Claude / GPTSchema.org JSON-LDWebflow / WordPress / CaddyGSC APICloudinary
17

Payment & Access
Control Bridge

Stripe / ThriveCart / Teachable / Shopify → CRM with token-gated content delivery. Customer pays, gets a unique access token, content unlocks automatically. Webhook-driven, recoverable, audited. Built for products where access leakage costs money.

Course creators, paid newsletters, gated SaaS, info-product businesses doing $30K+/mo whose access flow is held together with tape.

$4K–$10K build
+ $300–$700/mo
1–2 weeks
Stripe / ThriveCart webhooksFastAPIJWT tokensPostgreSQLCRM API
18

Outbound Sales
Automation

Automated prospect discovery (LinkedIn, Apollo, web scraping), ICP qualification with LLM scoring, personalized message generation, multi-step follow-up sequences. Replaces a $5K/mo SDR with a system that runs 24/7 and never gets tired.

B2B sales teams, agencies, consultants. Any business whose pipeline is bottlenecked by outbound capacity.

$5K–$12K build
+ $500–$1.5K/mo
1–2 weeks
Apollo / Sales NavigatorClaude (personalization)Smartlead / InstantlyCRM API
19

AI Avatar &
Video Pipeline

Branded talking-head videos generated from script. Voice cloning + face animation + B-roll + captions. From script to publish-ready MP4 in under an hour. Build it once, generate hundreds.

Course creators, marketers, agencies, language-localization teams. Any operation that publishes video at volume but burns hours per piece.

$3K–$8K build
+ $400–$1K/mo per brand
3–7 days
HeyGen / D-ID / AkoolElevenLabsRemotion / ffmpegWhisper (captions)
20

Custom Browser
Automation

Production-grade web automation: scraping behind logins, multi-step form filling, internal-tool RPA, anti-bot evasion, CAPTCHAs handled. Headed and headless modes, persistent sessions, residential proxy rotation. Built for jobs no zapier-grade tool can handle.

Operations teams stuck in manual data entry, agencies with one-off scraping needs, businesses dependent on legacy tools without APIs.

$4K–$10K build
+ $400–$1K/mo
1–2 weeks
Playwright / PuppeteerClaude (vision parsing)BrightData / SmartproxyQueue + retry infra
21

Telegram Bot Infrastructure

Business-grade Telegram bots: payment handling, user authentication, AI-powered replies, file uploads, group management, broadcast queues, audit logs. Built on FastAPI + python-telegram-bot. Self-hosted, no Botpress lock-in, no message-credit metering.

Communities, premium subscriber groups, customer-support deployments. Anyone using Telegram as a business channel and outgrowing free bot builders.

$2K–$6K build + $200–$600/mo
3–7 days
python-telegram-botFastAPIStripe / crypto paymentsClaude APIPostgreSQL

Languages & Markets

22 / 22
EN · PT · ES — Native Delivery
22

Multilingual AI Systems — EN / PT / ES

Most "multilingual" AI is English translated badly. Native delivery in English, Portuguese, and Spanish — voice agents, chatbots, content pipelines, document AI — built and tested by an engineer who speaks all three. Localized prompts, accent-correct voice, cultural register. Critical for Lusophone markets (Brazil, Portugal, Angola, Mozambique), Latin America, and US Hispanic businesses.

Brands expanding into PT/ES markets, government and enterprise contracts in Lusophone Africa, US businesses serving Hispanic customers, content teams localizing at scale.

$6K–$15K build + $400–$1K/mo
1–3 weeks per language pair
Native EN / PT / ESVoice cloning per localeCultural register tuningLusophone Africa expertise

Proof, Not Promises

// Real Production Systems

Public, verifiable engagements. Numbers from production logs, not pitch decks. More case studies (NDA-covered) available on the discovery call.

99%
16-phase content pipeline reliability

Production pipeline processing 500+ transcripts at 16 sequential phases (transcription, scoring, extraction, formatting, scheduling, publish). 99% completion rate at scale. Live at sr-demo-ai.com.

Content Extraction · Reliability Engineering
55hrs
Of "lost" coaching content recovered per month

Client had 55+ hours/month of unclipped Zoom coaching recordings. AI now identifies emotional peaks, framework drops, and contrarian takes — clips, formats, and queues them automatically. Content calendar fills itself.

Content Extraction Pipeline
12
Production tools exposed via custom MCP server

Self-hosted Model Context Protocol server (sincllm-mcp v2.0.0, SSE transport) giving Claude direct authenticated access to 12 internal tools and 3 resources. Architecture used in client deployments.

Custom MCP / AI Tool Servers
83K+
Lines of production Python shipped

Across SEO pipelines, browser automation infrastructure, payment-gated delivery, multi-tenant nginx deployments, and AI agent runtimes. Not POCs — running 24/7, processing real revenue.

Engineering Volume

Why Engineer-Built, Not Agency-Built

// The Honest Comparison

Three options in the AI services market right now. Here's where each one lands. I'll be the first to tell you when one of the others is the right call.

No-Code Agency Big AI Consultancy Hire In-House DLux Digital (Me)
Time to first ship 1–3 weeks 3–6 months 4 mo (hire) + 2 mo (ramp) 2 hours – 3 weeks
Total cost (year 1) $3K–$30K + monthly $200K–$2M+ $180K–$280K + benefits $2K–$40K build + $200–$5K/mo
Build approach Templated workflow stitching Slide deck → SOW → subcontract Greenfield from your hire Custom-built, BSEE-grade rigor
Who actually builds it Junior + n8n templates Subcontracted offshore team Your new hire (varies) Me. Senior, on every line.
Code ownership Locked to their workspace Their IP unless negotiated Yours Yours. Full handover, no lock-in.
Production reliability Demo-grade — fails at scale Variable Depends on hire Engineered for 99%+ reliability
When to choose One-off Zapier-tier task Fortune 500 transformation 10+ AI initiatives in flight Need it shipped, reliable, owned, fast

Strategy & Roadmapping

★ Premium Engagement
★

AI Strategy Consulting

Before building anything, most businesses need to know what to automate first and in what order. As a senior AI systems engineer, I map your highest-friction workflows, identify ROI, flag technical risks, and produce a prioritized automation roadmap — before a single line of code is written. Engineering depth that separates this from no-code agencies.

Any business that's heard the AI pitch a hundred times but doesn't know what's real, what's worth it, or where to start. Startup CTOs, ops directors, business owners.

$200–$500/hr
or $3K–$8K flat engagement
Automation roadmap + ROI model + vendor recommendations

How every
engagement
works

Five steps. Every service. Most systems are live within a week of first contact. Larger engineering builds run 2–6 weeks. Everything is documented and handed over — you own it. No platform lock-in, no vendor hostage situation.

Step 01
Discovery Call

30 minutes. We map the current workflow, identify the highest-friction points, and confirm the right service for the problem. No upsell — just clarity.

Step 02
Access & Audit

Read-only access to relevant systems. We audit integrations, data quality, and edge cases before touching anything. No surprises mid-build.

Step 03
Build & Configure

Custom build to match your brand voice, business rules, escalation logic, and existing tools. No templates — engineered from scratch.

Step 04
Test & Refine

Real-world scenario testing before go-live. You review every flow. Adjust until it's right — including edge cases and error handling.

Step 05
Go Live + Monitor

System goes live with 7-day monitored launch. Monthly retainer covers maintenance, model updates, performance tuning, and new feature additions.

Full Service Menu

All prices in USD. Retainer billed monthly. Build fee due 50% at kickoff, 50% at delivery. Strategy consulting billable hourly or flat-engagement.

#ServiceTierBuild FeeMonthly RetainerSetup Time
01AI Voice ReceptionistCore$3K – $5K$300 – $5002–4 hrs
02AI Review ManagerCore$500 – $1.5K$200 – $5001–2 hrs
03AI Lead QualifierCore$5K – $8K$500 – $1K4–8 hrs
04AI Ad Creative PipelineCore—$1K – $3K1 weekend
05AI Sales Call AnalyzerCore$2K – $4K$300 – $8004–8 hrs
06AI Document IntelligenceFlagship$8K – $20K$500 – $1.5K1–2 wks
07Predictive AnalyticsFlagship$10K – $30K$1K – $2K2–4 wks
08AI Compliance AutomationFlagship$15K – $40K$2K – $5K3–6 wks
09Edge AI DeploymentFlagship$8K – $25K$300 – $8002–5 wks
10Custom MCP / AI Tool ServersFlagship$4K – $10K$300 – $7001–2 wks
11Self-Hosted LLM StackFlagship$6K – $18K$400 – $1K1–3 wks
12AI System Audit & ReliabilityFlagship$3K – $8K flat—3–7 days
13Internal Knowledge AgentGrowth$5K – $12K$400 – $8003–5 days
14AI Proposal GeneratorGrowth$3K – $6K$200 – $4001–3 days
15Content Extraction PipelineGrowth$4K – $10K$500 – $1.5K1–2 wks
16SEO Article PipelineGrowth$5K – $15K$500 – $2K1–3 wks
17Payment & Access Control BridgeGrowth$4K – $10K$300 – $7001–2 wks
18Outbound Sales AutomationGrowth$5K – $12K$500 – $1.5K1–2 wks
19AI Avatar & Video PipelineGrowth$3K – $8K$400 – $1K3–7 days
20Custom Browser AutomationGrowth$4K – $10K$400 – $1K1–2 wks
21Telegram Bot InfrastructureGrowth$2K – $6K$200 – $6003–7 days
22Multilingual AI Systems (EN/PT/ES)Markets$6K – $15K$400 – $1K1–3 wks
★AI Strategy ConsultingPremium$3K – $8K flat$200 – $500/hr1 week

Frequently Asked

// Honest Answers
How fast can you actually ship?
Core services (AI Voice Receptionist, Review Manager, Lead Qualifier, etc.) ship in 1–8 hours. Engineering-grade builds (Document Intelligence, Compliance Automation, Edge AI) take 1–6 weeks depending on integration complexity. Most clients see a working demo within 7 days of the discovery call.
What if I don't know which service I need?
Start with AI Strategy Consulting ($3K–$8K flat). I map your highest-friction workflows, identify ROI, flag technical risks, and produce a prioritized roadmap before a single line of code is written. Often the audit alone reveals that you don't need what you thought you needed.
Do you handle the AI/LLM costs, or do I?
You own the API keys and pay providers directly (Claude, OpenAI, ElevenLabs). I never mark up tokens — that's vendor lock-in dressed up as a service. For high-volume clients, I'll often recommend Self-Hosted LLM Stack (#11) so per-token costs go to zero after deployment.
What does the monthly retainer actually cover?
Monitoring, model updates (when better models drop), prompt tuning, error-handling improvements, edge-case fixes, and small feature additions. It's an SLA, not a subscription. If a system is rock-solid and you need nothing, you can pause the retainer — and resume when you do.
Can I see the code? Do I own it?
Yes to both. Every build ships with full source code, deployment scripts, and runbooks. You own everything. No platform lock-in, no proprietary "agency dashboards" you can't access without my login. If we part ways tomorrow, you keep operating.
What's the difference between you and a no-code agency using n8n?
No-code agencies stitch templates. I architect systems. When their workflow breaks at 10x volume — which it will — they can't fix it because they didn't build the underlying logic. I write production Python with monitoring, error budgets, and explicit success metrics. See the comparison table above.
Do you work with non-US businesses?
Yes — globally. I deliver natively in English, Portuguese, and Spanish (see service #22). Strong specialty in Lusophone markets (Brazil, Portugal, Angola, Mozambique) and Latin America. Time zones overlap from US Pacific through Western European business hours.
What if my project doesn't fit any of the 22 services?
Mention it on the discovery call. The 22 services are the most common asks — but I've shipped custom systems for outliers too. If it's an engineering problem with an AI/automation answer, it's probably in scope. If it's not, I'll tell you and recommend who to talk to.
How do payments work?
50% at kickoff (covers discovery, audit, architecture). 50% at delivery (after you've reviewed and approved). Stripe, ACH, or wire — your call. Monthly retainers billed automatically. No prepay required for retainers — first month is invoiced after go-live.
What does "BSEE-grade rigor" actually mean?
Electrical engineering on physical systems means a mistake makes the building go dark. You don't get to ship a "demo." You design for redundancy, fault tolerance, and predictable failure modes — and you prove it works under load before energizing. I bring that same discipline to AI: monitoring on every critical path, explicit success metrics, error budgets, fallback paths, drift detection. Most "AI agencies" ship demos. I engineer for production.

Recent Thinking

// From the Field

Working notes from production AI engineering — what I learned shipping real systems for real businesses. Full archive on LinkedIn.

2026 · LLM Communication

The LLM is the Genie from Aladdin

Make one wish — and you get exactly what you asked for. But all wishes need to be in structured, properly formatted prompts. I was always leaving out important points because I felt like the model would read between the lines. I was wrong. Then I asked the model to change a single line of code and it spent 80k tokens. That's when I realized: tell the genie exactly where you want the change, with a strong format prompt.

Read on LinkedIn →
2026 · AI Hallucination

If You Don't Understand It, You Are the Second Hallucination

If you don't understand what you're asking the AI to do, then you become a second hallucination source — and now there are two working on your project. Your complete understanding of what the AI is doing is the only gate between hallucination and reality. This is why every system I ship has explicit success metrics: they're the gate.

Read on LinkedIn →
2026 · Content Operations

Your Best Content Is Rotting on a Hard Drive

One of my clients had 55 hours of Zoom recordings sitting unclipped. That's four months of daily content, fully produced, completely invisible. The bottleneck was never creation. It was extraction — turning raw recordings into publishable pieces. The gold is already mined. It's just sitting in a pile, unsorted. That's the system I build.

Read on LinkedIn →
// Let's Build Something That Works

Tell me what's breaking.

Discovery calls are 30 minutes, free, no pitch. We'll map your current workflow, find the highest-friction point, and confirm whether one of the 22 services fits — or whether you need something custom. If we're not the right fit, I'll tell you who is.

Reach Me on LinkedIn Email Direct
— or send the brief —

// Limited capacity. Currently accepting 4–6 new engagements per quarter.