Available for Select Automations & Architecture

Mateus Jeronimo

Back-End Developer & Automation Engineer

I architect robust databases, scalable microservices, and autonomous AI Agent systems that automate complex business processes. Focused on reliability, speed, and cloud-native standards.

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01. Identity

Behind the Code

I am a results-oriented Back-End Developer and Automation Specialist. My passion lies in constructing invisible systems that solve tangible problems. I focus on developing clean APIs, designing resilient database architectures, and deploying custom integrations that bridge legacy technologies with modern cloud platforms.

With the rise of large language models, I have specialized in building autonomous **AI Agent architectures** using LangChain and workflow tools like n8n. By embedding AI into backend microservices, I translate raw intelligence into secure, structured API endpoints and self-correcting automation workflows.

Systems Architecture

High-performance backends and clean REST/gRPC endpoints.

Agentic Automations

n8n workflows, tool calling, and self-improving agents.

02. Stack

Technical Stack

Modern toolsets and frameworks used to craft resilient systems and workflow automations.

Backend Engineering

Building high-availability server cores, design patterns, microservice networks, and database schemas.

Node.jsTypeScriptBootstrapNestJSExpress
PostgreSQLRedisBullMQSQLJQL

AI & Automation

Integrating multi-agent systems, complex workflow orchestrations, vector embedding retrievers, and ETL schedules.

LangChainn8nMake.comLlamaIndexFlowiseLangflow
PGSQL VectorOpenAI APIAnthropicRAGAgent Tooling

Cloud & Infra

Deploying immutable infrastructure, container virtualization, CI/CD integrations, and telemetry alerts.

AWSDockerDocker ComposeGCP KubernetesJira Cloud
GitHub ActionsCI/CDGrafanaLinux
03. Showcase

Featured Projects

A selection of systems, pipelines, and autonomous AI operations built from the ground up.

Backend SystemProduction

SocialMetaCollector

Developed a social media management and automation platform that integrates with YouTube, Facebook, Instagram, X (Twitter), TikTok, LinkedIn, and Google Ads through OAuth 2.0 authentication. The platform centralizes analytics, engagement metrics, and account management across multiple social networks. Key features include automated video scheduling and publishing, enabling users to upload content once and automatically distribute it to selected platforms at predefined dates and times. The solution was designed to streamline social media operations, improve content management workflows, and provide unified performance insights across multiple channels.

  • Resilient Puppeteer Scrapers
  • BullMQ Asynchronous Queues
  • Relational Database Mapping
  • Redis High-Speed Cache
Node.jsPuppeteerRedisPostgreSQLDockerBullMQ
scraper.logs
// Initializing metadata collection...
> npm run start:collector
[SYSTEM] Connecting to Redis queue at redis://127.0.0.1:6379
[SYSTEM] Database pool connected: postgresql://db_user:***@host:5432
[PROCESS] Spawning chromium headless worker 01
[WORKER 01] Fetching: https://facebook.com/r/technology/hot.json
[QUEUE] Job 9482 pushed to meta-extraction-queue
[WORKER 02] Extracted 42 metadata metrics. Payload size: 12.4KB
[DB] Executing multi-insert into target "social_posts"
[SYSTEM] Worker idle. Batch completed in 840ms.
> _
AI & NLP SystemEnterprise

Jira Cloud & AI Agents Integration

Designed and implemented an AI-powered customer feedback intelligence platform using n8n, Jira Cloud, Atlassian Rovo, Zendesk, Consumidor.gov.br, PostgreSQL, and Grafana. The solution automatically analyzes customer support conversations whenever a Jira ticket is created. Through integration with Atlassian Rovo Agents, customer transcripts are retrieved from Zendesk and processed using AI-driven sentiment analysis to generate actionable metadata tags related to customer satisfaction, frustration points, and service quality. These insights are stored in a centralized database and visualized through Grafana dashboards, enabling leadership teams to identify recurring pain points, monitor customer sentiment trends, prioritize operational improvements, and support strategic decision-making through data-driven analytics.

  • Dynamic Multi-plataform Router Agents
  • PGSQL Vector Retrieval
  • RAG Validation Pipelines
Jira CloudN8NNodeJSOpenAI APIZendeskGrafanaAtlassian Rovo
routing_architecture
Trigger ZendeskROUTERLangChain AgentClassificationRAG queryPGSQL DBGenerateGrafana Dash98.2% Accuracy
Workflow AutomationIntegration

AI Scheduling Agent

A multi-tiered booking integration running on n8n. The system reviews incoming meeting emails, identifies potential slots in Google Calendar, checks CRM systems to log client information, and automatically coordinates dates.

  • n8n Visual Automation
  • Calendar API Concurrency
  • HubSpot CRM Sync
  • Multi-Turn Email Negotiator
n8nTypeScriptOpenAI APIGoogle Calendar APIHubSpot
calendar_negotiator
[INCOMING EMAIL]"Would next Thursday morning work for a sync?"
PARSE
n8n Router node
[CALENDAR RESOLVER]Available slot: June 18th at 10:00 AM EST
BOOKED
04. Experience

Career History

My career trajectory developing back-ends, managing integration suites, and constructing automated workflows.

Back-End Developer & Automation Engineer

CoreAgents

Feb 2024 - Dec 2024
  • Developed and maintained authentication and authorization systems, implementing middleware, validation layers, and security controls.
  • Built scalable backend APIs and integrations using Node.js and PostgreSQL, focusing on reliability and maintainability.
  • Implemented observability solutions with Grafana, creating automated dashboards for application and operational monitoring.
  • Designed automated testing scripts and security mechanisms including rate limiting, XSS protection, and SQL Injection prevention.
  • Integrated databases with AWS S3 storage using metadata-driven workflows and observability standards.
  • Contributed to AWS cloud infrastructure integrations and automation workflows to support business operations.
Node.jsTypeScriptPostgreSQLAWSDockerGrafanaRedisn8n

Data Analyst & AI Automation Engineer

Kaizen Gaming

Jan 2025 - May 2026
  • Conducted research, system modeling, and machine learning initiatives to address business and operational challenges.
  • Developed AI Agents and automation solutions that significantly improved team productivity and workflow efficiency.
  • Created a Slack bot with real-time notifications and observability features for management and operational teams.
  • Integrated Jira Cloud, Zendesk, Consumidor.gov, and Google Workspace to streamline support and data management processes.
  • Built an automated AI knowledge pipeline integrated with Confluence to improve information accessibility and knowledge management.
NodeJSMachine LearningAI Agentsn8nSlack APIJira CloudZendeskGoogle Workspace
05. Network

Get In Touch

Whether you have an automation project, database queries to optimize, API design needs, or just want to chat about agentic AI models - drop me a message.