Gabriel Serejo

Email:gabrielserejo11@gmail.com

Phone:+55 (62) 9 9406-3442

Website:serejo.dev

Objective

Generative AI Engineer

Summary

Generative AI Engineer with 2 years of specialized experience building production-grade LLM and RAG applications, backed by 8+ years in full-stack software engineering. I combine deep expertise in backend systems, databases, and frontend (Python, Node.js, Vue/Nuxt) with modern AI frameworks (LangChain, Vector DBs) to design and ship scalable, intelligent systems. Proven track record of leading architectural migrations and delivering high-impact AI solutions for international markets.

Technical Proficiencies

• Generative AI

• RAG

• LLMs

• AI agents

• MCP (Model Context Protocol)

• LangChain

• TypeScript

• Python

• PyTorch

• Prompt Engineering

• Vector Databases

• NLP

• PII

• Hugging Face

• Model APIs (OpenAI, Gemini, Anthropic)

• Self-hosted Models (Ollama, vLLM, Hugging Face)

• Cloud Platforms (Azure, AWS, GCP)

• TensorFlow

• Deep Learning

• LangSmith

• LangFuse

• OTel

• Google ADK

• Ragas

Certifications

• Oracle Agentic AI Certified Foundations Associate (2026)

• Google AI Professional Certificate (2026)

• Oracle AI Vector Search Certified Professional (2026)

Professional Experience

Generative AI Engineer

Jun 2024 - Present

Implanta IT Solutions

I engineered 'Atlas', a production-grade RAG chatbot using LangChain, Vercel AI SDK, and pg-vector that unified company documentation, significantly accelerating internal onboarding.
I developed a high-precision semantic cross-reference system using Embedding models, enabling automated product normalization through NLP.
I architected 'Cockpit 2.0', implementing a dynamic UI-from-API rendering engine using advanced TypeScript patterns that decoupled frontend deployments.

Software Engineer

Jul 2023 - May 2024

TLScontact

I was the lead developer for the official customer support chatbot, overseeing the integration of conversational flows and ensuring a seamless user experience.
I championed the migration of the help module to a 'Feature Services' architecture, providing the scalability required for future AI tool integration.
I delivered critical features and mitigated vulnerabilities for institutional visa tools using Vue 3 and Node.js.

Software Engineer

Jan 2023 - Aug 2023

Cliqx

I scaled the front-end architecture for a major retail application (Pernambucanas) using a service-oriented hexagonal pattern in Nuxt 3.
I engineered and integrated an AI-powered resume scanning and parsing feature for the Pernambucanas recruitment platform, automating candidate data extraction.
I designed a high-performance caching layer using Redis and SWR, establishing the performance foundation necessary for data-intensive applications.
I successfully migrated legacy workflows to modern reactive patterns, improving team velocity and system throughput.
I managed cloud infrastructure on Azure, taking initiative to provision and configure server instances alongside development duties.

Software Engineer

May 2022 - Jan 2023

UniFAJ

I developed the end-to-end user interface for the student admission application, covering all critical stages from initial registration to the completion of exams and essays.
I implemented key new features while simultaneously restructuring legacy code, applying 'clean code' principles to enhance the application's maintainability and overall quality.

Software Engineer

Jan 2020 - Oct 2022

Agência Industrial

I delivered complete, end-to-end web solutions for multiple clients, managing the entire project lifecycle from UI/UX design to full-stack implementation and deployment.
I developed and launched websites for prominent local companies, including Cremozinn, establishing their digital presence in the market.
I enhanced client projects by developing and integrating small-scale AI solutions using the GPT-3 API with Python and Node.js.
I started using OpenAI's API to automate tedious processes. As specialized frameworks weren't available at the time, I developed custom wrapping strategies using Regex and Zod.

Software Engineer

Jun 2019 - Sep 2021

ITH Pós Graduação

I led a complete refactoring of the legacy application, a project that directly improved Google Speed Insight scores and significantly reduced advertising (ADS) expenses.
I developed and launched a new front-end application using Nuxt2, which integrated with the company's WordPress CMS to modernize the user experience and content delivery.

Projects

Atlas Chatbot & Cockpit 2.0 (RAG & Semantic Search)

– Implanta IT Solutions

I engineered "Atlas", a production-grade RAG chatbot using LangChain, Vercel AI SDK, and pg-vector that unified documentation and accelerated onboarding.
I developed a semantic cross-reference system using embedding models for automated product normalization via NLP.
I architected "Cockpit 2.0", designing a dynamic UI-from-API engine using advanced TypeScript that decoupled frontend from feature launches.

Customer Support Chatbot & Scalable Micro-Frontend Migration

– TLScontact

I was the lead developer for the official customer support chatbot, managing end-to-end integration of conversational AI flows.
I championed the migration to a "Feature Services" architecture, establishing the scalability required for real-time AI toolsets.
I oversaw security and feature delivery for institutional visa tools using Vue 3 and Node.js.

Retail Application Architecture (High-Concurrency Patterns)

– Cliqx

I managed cloud infrastructure on Azure, provisioning and configuring server instances to support high-concurrency retail applications.
I scaled the front-end architecture for a major retail application (Pernambucanas) using a service-oriented hexagonal pattern.
I implemented an AI-powered resume scanning and parsing feature for the Pernambucanas project, automating structured candidate data extraction.
I engineered a high-performance Redis/SWR caching layer, providing the low-latency foundation necessary for AI-driven data apps.
I migrated legacy workflows to Nuxt 3, improving system throughput and team development velocity.

Student Admission Application

– UniFAJ

I developed the end-to-end user interface for the student admission application, covering all critical stages from initial registration to the completion of exams and essays.
I implemented key new features while simultaneously restructuring legacy code, applying clean code principles to enhance the application's maintainability and overall quality.

Web Solutions & AI Integration

– Agência Industrial

I delivered complete, end-to-end web solutions for multiple clients, managing the entire project lifecycle from UI/UX design to full-stack implementation and deployment.
I enhanced client projects by developing and integrating small-scale AI solutions using the GPT-3 API with Python and Node.js.

Legacy Application Refactoring & CMS Integration

– ITH Pós Graduação

I led a complete refactoring of the legacy application, a project that directly improved Google Speed Insight scores and significantly reduced advertising expenses.
I developed and launched a new front-end application using Nuxt2, which integrated with the company's WordPress CMS to modernize the user experience and content delivery.

Education

Universidade Federal de Viçosa

Completed in Aug 2026

Postgraduate Specialization in Artificial & Computational Intelligence

UniAraguaia Centro Universitário

Completed in Dec 2022

Advertising and Marketing