Resume

Guilherme Balduino Lopes

Backend Software Engineer | Go & Python | Distributed Systems | Applied AI

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Profile

Backend Software Engineer with 5+ years of experience building backend services and connected systems using Golang and Python. Experienced in distributed systems, APIs, microservices, cloud infrastructure, and the software lifecycle from architecture to production operations. Most recently tech lead of a multi-tenant LLM platform (13 Go services, 3 MCP servers, PostgreSQL/pgvector) and a number-portability gateway live across 3 telecom operators. Combines a background in embedded systems, C/C++ and IoT with hands-on work on LLM integration, RAG, and AI agents.

Professional Experience

Senior AIoT & Backend Engineer / Tech Lead

Envor Technologies

Oct 2024 – Present

Remote

  • Led architecture and delivery of a multi-tenant LLM platform (13 Go services, 3 MCP connector servers, PostgreSQL/pgvector, MongoDB, Redis) from zero to pre-launch; top contributor with 520+ merged PRs.
  • Designed fail-closed tenant isolation and HMAC-signed service-to-service authentication controls, implemented PII redaction (LGPD), and resolved a cross-tenant authorization flaw before launch.
  • Built and deployed a Go number-portability gateway across 3 telecom operators and 8 production environments, replacing legacy vendor systems with zero regression and zero downtime, handling 110,000+ requests on cutover day.
  • Diagnosed a legacy integration defect affecting ~245,000 messages and restored a daily reconciliation workflow covering 3,000 tickets.
  • Led a 6-month elderly-care AIoT MVP integrating voice interaction, smartwatch telemetry, and emergency calls.
  • Set the engineering standard across platforms: 60 architecture decision records, ~4,900 Go tests with mutation testing, and an AI-assisted multi-agent review pipeline sustaining ~60 PRs/month.

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

Wisebyte

Aug 2022 – Oct 2024

Uberlândia, Brazil

  • Owned the lifecycle of a 1,500+ IoT device fleet across 7 models (launched 5), from C/C++ firmware to Python backend.
  • Engineered real-time embedded firmware to ensure resilient edge connectivity (MQTT over Wi-Fi, LoRaWAN, 4G/LTE).
  • Built monitoring and automation APIs (Flask) for over-the-air (OTA) updates of dozens of devices simultaneously.

Undergraduate Research Fellow

LASEC - UFU

Jul 2021 – Aug 2022

Uberlândia, Brazil

  • Built a Modbus-to-MQTT gateway and serverless AWS telemetry pipeline (IoT Core, Lambda, DynamoDB) for legacy industrial equipment; published as B.Sc. thesis and journal article (University Repository · VETOR, 2021).

Independent Projects & Consulting

Independent Software Engineer

Self-Employed

Oct 2021 – Present

Remote

  • AI Portfolio Template (Oct 2026 – Present): Open-sourced (MIT) a Next.js/TypeScript portfolio template extracted from mikin.ai, with an AI assistant grounded on the site's content, streaming responses, and Redis rate limits (GitHub · live demo).
  • PiKiTo Pages (Feb 2026 – Present): Building a web platform for creating and deploying high-performance business landing pages using TypeScript and Next.js (pikitopages.com).
  • WaveHub (Jun 2023 – Present): Developing custom web applications, integrations, and business automation workflows for external clients (wavehub.dev).

Education

Postgraduate Degree in Applied Artificial Intelligence Engineering

UNIPDS / Anhanguera

Dec 2025 – Dec 2026

Remote

Technical Skills

Languages

GoPythonTypeScriptSQLC/C++

Backend & Data

Distributed SystemsMicroservicesREST APIsPostgreSQLMySQLMongoDBRedisKafka

Cloud & DevOps

AWSDockerKubernetesCI/CDGitHub Actions

Observability

OpenTelemetryPrometheusGrafanaJaeger

Applied AI

LLM orchestrationRAGAI AgentsMCP

Embedded & IoT

MQTTLoRaWANESP-IDFEmbedded Systems

Spoken

English (fluent)Portuguese (native)French (conversational)

October 2026

© 2026 Guilherme Balduino Lopes. All rights reserved.