Works

Execution across backend platforms, applied AI, IoT, and research.

This is where delivery becomes concrete: production systems, independent projects, research, and selected solution work shaped from a backend, platform, and applied AI perspective.

Professional Experience

Roles where platform thinking, edge-to-cloud delivery, and applied AI execution were part of the day-to-day work.

Period: Oct 2024 - Present

Envor

As tech lead, Guilherme led the backend architecture of a multi-tenant LLM platform (13 Go services and 3 MCP connector servers on PostgreSQL/pgvector, MongoDB, and Redis), designing fail-closed tenant isolation, HMAC-signed service authentication, and PII redaction. He built and deployed a Go number-portability gateway across 3 telecom operators and 8 production environments, replacing legacy vendor systems with zero regression (110,000+ requests on cutover day). He also diagnosed a legacy integration defect affecting 245,000 messages, led a 6-month elderly-care AIoT MVP, and set the engineering standard: 60 ADRs, 4,900 Go tests, and mutation testing as a merge gate.

LLM Platform / Telecom / AIoTStatus: Current

Role: Senior AIoT & Backend Engineer / Tech Lead

Scope: Multi-tenant LLM platform, telecom number portability, legacy integrations, an AIoT MVP, and engineering standards

Stack

Go (Golang)PythonC/C++PostgreSQL / pgvectorMongoDBRedisKafkaDockerMicroservicesMCPRAGAI agentsAIoT

Links

Company website
Period: Aug 2022 - Oct 2024

Wisebyte

Guilherme owned the lifecycle of a 1,500+ IoT device fleet across seven product models, from C/C++ firmware (ESP-IDF, FreeRTOS) to the Python backend behind it, and took five new product lines through to field release. He engineered resilient connectivity over MQTT, Wi-Fi, LoRaWAN, and 4G/LTE, and built Flask APIs for fleet monitoring and over-the-air updates to dozens of devices at once.

IoT R&DStatus: Delivered

Role: Systems Analyst, IoT R&D (Promoted from Junior)

Scope: Connected device fleet, embedded firmware, OTA updates, and fleet tooling

Stack

C/C++ESP-IDFFreeRTOSPlatformIOPythonFlaskMQTTLoRaWAN4G/LTE
Period: Jul 2021 - Aug 2022

LASEC - UFU

Guilherme built a Modbus TCP-to-MQTT gateway in Python, with a Kivy configuration interface, that connected legacy industrial equipment to the cloud. He added a serverless AWS pipeline (IoT Core, Lambda, DynamoDB, SNS) for telemetry and alarms, and a Node-RED dashboard for real-time monitoring and remote commands. The work became his B.Sc. thesis and a journal article, with PIBIC/CNPq funding.

Industry 4.0 ResearchStatus: Delivered

Role: Undergraduate Research Fellow

Scope: Industrial automation, Modbus/MQTT integration, and AWS telemetry

Stack

PythonMQTTModbusNode-REDAWS LambdaDynamoDBIoT CoreSNSKivyRaspberry Pi

Independent Projects & Consulting

Independent work since 2021: client projects under the WaveHub brand since 2023, and products built alongside.

Client projectsPeriod: Jun 2023 - PresentStatus: Active

WaveHub

Role: Partner and co-founder

Custom web applications, system integrations, and business automation for external clients, including invoicing automation, multimedia management apps, and Python data pipelines feeding Grafana and Power BI dashboards.

Scope: Websites, web/mobile applications, integrations, and automation

Links

Website
ProductPeriod: Feb 2026 - PresentStatus: Active

PiKiTo Pages

Role: Partner and co-founder

A platform for creating and deploying high-performance landing pages for small businesses, built with TypeScript and Next.js.

Scope: Rapid landing-page publishing and product delivery

Links

Website
Open sourcePeriod: Oct 2026 - PresentStatus: Active

AI Portfolio Template

Role: Creator and maintainer

An MIT-licensed Next.js and TypeScript template, extracted from this portfolio, for personal sites with an optional AI assistant that answers from the site's typed content. Replies stream from an OpenAI-style Chat Completions API; Redis-backed rate limits, quotas and daily caps keep usage in check; the site works without an API key (with an optional simulated demo mode); and it ships in English and Brazilian Portuguese with light and dark themes.

Scope: Open-source portfolio template with an optional AI assistant

Links

GitHubLive demo

Systems, Websites & Interfaces

Selected cuts of other delivery work, ad hoc collaborations, and side tracks parallel to the career line Guilherme leads publicly.

Website / product surfaceStatus: Live

This portfolio

Role: Architecture, implementation, and AI grounding

A localized Next.js portfolio featuring MiKiN, a grounded AI chat: server-side context assembly, SSE streaming, prompt-injection checks, and Redis-backed rate limits and quotas that fail closed.

Scope: Localized content, metadata, route contracts, and grounded AI chat

Stack

Next.jsTypeScriptTailwind CSSHeroUIAOSLLM API (OpenAI-compatible)Upstash Redis

Links

Website
Systems deliveryStatus: Representative

Other interfaces and apps outside this portfolio

Role: Architecture, integrations, and shipping

Guilherme has other UIs, marketing sites, and web apps that are not listed openly in this portfolio and sit outside the storyline he is leaning into right now. He does not name or link them here: his public focus is platform, backend, and applied AI, not collecting front-end showcase pieces.

Scope: Additional UIs, sites, and web apps, outside the current public focus

Names, brands, and public URLs are intentionally out of this cut, not a statement of inactivity.

Research & Academic Work

Academic work that sharpened the production mindset around telemetry, industrial protocols, and AI-ready systems.

Bachelor’s thesisPeriod: 2021Status: Published

Development and Implementation of a Remote Control and Monitoring System in the Context of Industry 4.0

Architected a Modbus-to-MQTT gateway on Raspberry Pi and an AWS-based pipeline with IoT Core, Lambda, DynamoDB, and SNS, delivering an end-to-end Industry 4.0 platform.

Scope: Bachelor’s Thesis • Universidade Federal de Uberlândia

Stack

Raspberry PiModbusMQTTAWS IoT CoreAWS LambdaDynamoDBSNS

Links

Institutional repository (UFU)
Journal publicationPeriod: 2021Status: Published

A Remote MQTT-based Data Monitoring System for Energy Efficiency in Industrial Environments

Presented an IoT framework that streams Modbus telemetry via MQTT to cloud dashboards, enabling AI-ready energy efficiency insights.

Scope: VECTOR - Journal of Exact Sciences and Engineering

Stack

MQTTModbusCloud telemetry

Links

YouTubeArticle (VETOR / FURG)

© 2026 Guilherme Balduino Lopes. All rights reserved.