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Nicolas Arthur

Available for new projects

About

Software engineer focused on enterprise AI and scalable architecture.

Nicolas Arthur Raulino Oliveira

AI Software Engineer

AI Software Engineer specializing in enterprise LLM systems, Retrieval-Augmented Generation (RAG), and multi-agent orchestration. Proven ability to architect and deploy production-grade AI platforms handling large-scale unstructured data, combining scalable backend engineering with modern full-stack development.

10+Projects delivered

5+Clients/companies

5+Years of experience

Off the clock

Music · Development · Gaming · Racing · Artificial Intelligence

PythonLangChainNext.jsReactTypeScriptFastAPIPostgreSQLAzureDockerTailwindThree.jsJavaGit

Services

From AI automation to full web systems, I solve real problems and deliver measurable results.

Automation with Artificial Intelligence

Your team loses hours on repetitive tasks: reading documents, filling spreadsheets, answering the same questions. The result is delays, errors, and less time for what really matters. I automate these processes so you can make decisions faster, cut rework, and free people for higher-impact work, without hiring a huge team.

Web Apps from Zero to Production

You have an idea that could generate revenue or solve a real problem, but it stays on paper or in spreadsheets. You're missing a product people can actually use. I build the full system: from first draft to live, with real users. You get a product that delivers value, scales with demand, and opens the door to grow the business.

Scalable Architecture & Infrastructure

Your system works today, but when the business grows everything freezes, breaks, or becomes a black box nobody understands. The fear of changing something and bringing it all down paralyzes the team. I design and organize the foundation of your system so it can handle growth, traffic spikes, and future changes, you scale with confidence, without throwing everything away and starting over.

Prototypes and mockups from your ideas

Your idea lives in your head or in scattered notes, and it's hard to show partners, investors, or clients what you want to build. Without something visual and clickable, alignment is tough and the risk of betting on the wrong project goes up. I turn your idea into prototypes and mockups that everyone can see, use, and validate, so you decide with clarity before putting more time and money on the table.

Chatbots for your business

Customers expect fast answers and your team can't keep repeating the same information all day. Support gets delayed, opportunities are lost, and repetitive tasks wear people down. An assistant that answers frequent questions 24/7 cuts wait time, frees the team for cases that really need a human, and improves the experience of everyone who reaches out to your brand.

Portfolios and sites for your business

You or your company need a clear, professional presence online: anyone seeing your work for the first time should quickly understand what you do and why to trust you. An outdated site or no portfolio at all lets opportunities slip. I create pages and portfolios that build credibility, showcase your work, and make that first contact easy, so you close more deals and get found by people looking for what you offer.

No commitment

Free 30-Minute Consultation

Not sure where to start? I'll understand your problem and propose a solution, no cost, no hassle.

Book free session

What they say about me

"Nicolas is an exemplary professional, very dedicated and always open to new ideas. I had the pleasure of developing several solutions with him, Python was our favorite language for automating day-to-day tasks."

Software Developer, Java & Python

"He always stood out for his effort, discipline and dedication. He showed above-average maturity, seeking to learn beyond what was required and anticipating challenges. He's the kind of professional who doesn't wait for opportunities, he prepares for them."

Backend Developer, Java & Spring Boot

"Nicolas is a gold-standard professional. He started as an intern, but from the beginning showed he was someone worth betting on. Always full of ideas and with a very interesting vision on technology and AI."

Head of Product, ERPs, Payments & GovTech

Projects Open-Source

Selected work across AI, web, and automation, from MVPs to production systems.

Paper CLI

Command-line academic search engine. Natural language queries for papers, authors, and graduate programs.

PythonLangChainLangGraphTyper

Museum Website

Responsive landing page with immersive interactive 3D virtual tour using Three.js. São José cultural project.

Next.jsReactTailwind CSSThree.js

Songlub

Music studio club offering courses and musical activities. Web system to manage student and musician enrollment and payments (registration and monthly fees).

Front-EndIFSCReactLanding