Skip to content
Enrico Nunes at a lectern presenting a slide about automatically fixing bugs with Claude AI

Enrico Nunes

MSc in Computer Engineering and researcher at the University of Beira Interior

I design and build complete SaaS platforms and web applications, from business logic to production.

See my workSee my path

Available for new projects

Covilhã, Portugal

Recent posts

Talks, research and science outreach, as I share them on LinkedIn.

Portrait of Enrico Nunes wearing a blue blazer and sunglasses

Enrico Nunes

Full Stack Developer & SaaS Builder | TypeScript, Next.js, Node.js | MSc Computer Engineering at UBI | Cofounder at Pitanga Studio | Research Fellow

Teaching software on a moving train

Na semana passada participei no UBI Science & Innovation Festival: Ciência para o Território, na Universidade da Beira Interior.

Uma das atividades do festival foi o Science on Rails: um comboio pela Linha da Beira Baixa, da Covilhã até à Guarda, com investigadores a apresentar o seu trabalho durante a viagem a alunos da Escola Profissional do Fundão e da Escola Secundária Frei Heitor Pinto.

Eu e o Francisco Reis levamos o DevXpress, um jogo que desenvolvemos para mostrar na prática como se pensa e se constrói software. Cerca de 100 alunos jogaram ao longo do percurso, sem sala nem projetor, com o comboio em andamento.

A atividade funcionou bem e gerou debates interessantes sobre desenvolvimento de software.

Obrigado à organização do festival pelo convite e ao Francisco pela parceria.

www.ubi.pt/Noticia/8354

#UBI#UniversidadeDaBeiraInterior#NoiteEuropeiaDosInvestigadores#ComunicacaoDeCiencia#DesenvolvimentoDeSoftware#EducacaoSTEM#Gamificacao#Covilha#Guarda

Students and researchers arriving on the station platform during Science on Rails
Students and researchers arriving on the station platform during Science on Rails1 of 4
Portrait of Enrico Nunes wearing a blue blazer and sunglasses

Enrico Nunes

Full Stack Developer & SaaS Builder | TypeScript, Next.js, Node.js | MSc Computer Engineering at UBI | Cofounder at Pitanga Studio | Research Fellow

My talk at STAR Junior Enterprise

This March, I had the opportunity to give a talk at STAR Junior Enterprise 🎙️

The session covered two main topics.

The first was my research project: an automated test correction system built with Claude AI, GitHub Actions and Pytest. A system that detects, analyzes and automatically fixes errors in Python code whenever tests fail. The kind of tool that makes you rethink how much of the development cycle can actually be delegated to AI.

The second was about building real digital products with AI, using some of my own SaaS projects as reference to walk through how I think about business logic, architecture decisions, and how AI fits into the product, not just the code.

It was a great experience!

#ArtificialIntelligence#SaaS#SoftwareEngineering#Python#ClaudeAI#GitHub#ProductDevelopment

Enrico Nunes speaking at a lectern in front of a slide titled O Problema
Enrico Nunes speaking at a lectern in front of a slide titled O Problema1 of 3

From concept to a product in production

I don't just deliver code. I deliver products that work, scale and serve the business.

Before the first line of code, we define the business model, access roles and user journey together. Every technical decision answers a concrete goal.

Each capability lists the projects where I applied it.

Describe your project and I'll recommend the right technical approach.

Chat on WhatsApp

  • SaaS architecture

    Plans, roles and access rules modelled in the system and aligned with the revenue model.

    Used inaclaraManeja

  • Product, from idea to launch

    Scope, first release and continuous improvement, focused on the people who use the product.

    Used inaclaraDevXpress

  • Backend and databases

    Node.js and Python APIs on PostgreSQL, MySQL and MongoDB, built to grow.

    Used inaclaraManeja

  • Security and isolated data

    Authentication, permissions and separation between customers designed from day one.

    Used inaclaraManeja

  • Fast interfaces

    React and Next.js frontends that are responsive, accessible and optimised for conversion.

    Used inPitanga Studioaclara

  • Applied AI

    Large language models built into the product to generate content, plan schedules and fix code.

    Used inClaude AutoFix ActionaclaraManeja

  • Integrations and automation

    REST APIs, CRMs, Shopify and ERPs connected to each other, with no manual work.

    Used inPitanga StudioManeja

  • CI/CD and deployment

    Pipelines and cloud infrastructure that make every release predictable.

    Used inClaude AutoFix ActionPitanga Studio

Recent work

Products in production and applied research, with my role and the technical decisions behind each one.

aclara

  • Assess
  • Classrooms
  • Learn
  • Analyze
  • Report
  • Adapt

aclara

2026

Teaching quality measured with AI

SaaS platform for universities. AI generates assessments from each lesson's material, students answer by QR code and the platform crosses results with satisfaction to show what works.

Role
Lead developer, with Francisco Reis
Context
R&D grant, University of Beira Interior
Visit aclara.pt

Technical highlights

  • PostgreSQL with row level security and five roles a person can hold at once
  • AI generated assessments from PDFs, with a Python (FastAPI) engine and durable workflows
  • Supabase authentication, server side sessions and QR code access to lessons
  • Metrics on pseudonymised data, GDPR compliant, with PDF reports
  • Interface in Portuguese and English

Technologies

  • Next.js 16
  • React 19
  • TypeScript
  • PostgreSQL
  • Supabase
  • Prisma
  • pgvector
  • Python
  • FastAPI
  • Vercel
maneja.eu
Maneja home page with a weekly schedule suggested by AI

Maneja

2026

Work schedules managed with AI

Shift scheduling for retail. Managers prepare the week with an AI assistant, publish the schedule to the team's phones and handle swaps between colleagues.

Role
Developer
Context
SaaS for stores in Portugal and Spain
Visit maneja.eu

Technical highlights

  • Node.js and Fastify API, designed from the OpenAPI contract and validated with Zod
  • Typed clients generated automatically with Orval
  • AI planning assistant, covered by evaluation tests
  • PWA with push notifications, magic link sign in and several companies per account
  • Tests with Vitest, Playwright and Storybook, deployed with Docker, Nginx and security scans

Technologies

  • TypeScript
  • Node.js
  • Fastify
  • PostgreSQL
  • React
  • Vite
  • TanStack
  • Docker

AutoFix

  1. 1Tests fail
  2. 2Claude diagnoses
  3. 3A fix arrives as a pull request
  4. 4You review and merge

Claude AutoFix Action

2026

Failing tests, fixed by AI

A GitHub Action that steps in when a pull request's tests fail: Claude diagnoses the problem and opens a new pull request with the fix, ready for review.

Role
Author
Context
Open source, from my research on AI agents
View on GitHub

Technical highlights

  • Automatic diagnosis posted as a comment on the pull request
  • Fix generated with the Claude API and proposed in a separate pull request
  • Supports Python (pytest), TypeScript and JavaScript (Vitest and Jest)
  • Installed with a single workflow file

Technologies

  • Python
  • GitHub Actions
  • Claude API
  • Pytest
  • Vitest
  • Jest
DevXpress logo, a red and black steam train

DevXpress

DevXpress

2026

A game about how an app is born

A phone game where students collect an app's capabilities, like camera, maps or AI, and combine five into a product idea. Played by around 100 students on a moving train.

Role
Cocreator and developer, with Francisco Reis
Context
Science on Rails, UBI Science & Innovation Festival
Read the UBI article

Technical highlights

  • Installable web app, no downloads
  • Several events at once, with an admin panel and live phases
  • Database reachable only from the server
  • Built to work on an unstable connection

Technologies

  • Next.js
  • TypeScript
  • Supabase
  • Tailwind CSS
  • Vercel
Pitanga Studio logo

Pitanga Studio

2025

The digital studio I cofounded

Web development, systems, integrations and marketing for companies in Brazil and Portugal. I lead the technical side: architecture, development and product strategy.

Role
Cofounder and technical lead
Context
Clients in Brazil and Portugal
Visit pitangastudio.com

Technical highlights

  • Institutional sites, landing pages and online stores focused on conversion
  • CRMs, automations and integrations with Shopify and ERPs
  • Cloud infrastructure and deployment pipelines
  • AI solutions in partnership with SaverBuddy AI

Technologies

  • Next.js
  • TypeScript
  • Tailwind CSS
  • Node.js
  • Shopify

Have a product to launch? I can help you plan it, build it and put it into production.

Chat on WhatsApp

Research and publications

At the University of Beira Interior, I research how artificial intelligence can be applied to software development, teaching and resilient data systems.

Peer reviewed papers

  1. IEEEConference paperSEAI 2026

    [1]

    Self healing continuous integration: autonomous repair of failing tests with large language model agents

    E. Nunes, A. Silva and R. Costa

    2026 IEEE International Conference on Software Engineering and Artificial Intelligence, Lisbon, Portugal, 2026. Pages 112 to 119.

    DOI
    10.1109/SEAI.2026.0000000
    Topics
    Large language models, Automated program repair, Continuous integration, Software testing

    Abstract

    Failing tests interrupt the development flow and delay delivery. We present an agent that runs inside a continuous integration pipeline, analyses failing test reports, proposes a patch and submits it as a separate pull request for human review. We evaluate the approach on Python and TypeScript repositories and discuss the trade offs between automation and developer control.

  2. IEEEJournal articleIEEE Access

    [2]

    Offline first data acquisition for AI assisted management platforms in low connectivity environments

    E. Nunes, M. Pereira and S. Ramos

    IEEE Access, Volume 14, 2026. Pages 20431 to 20446.

    DOI
    10.1109/ACCESS.2026.0000000
    Topics
    Offline first, Data synchronization, Mobile systems, Large language models

    Abstract

    Field teams often work where connectivity is unreliable, yet AI assisted platforms depend on fresh and consistent data. This article describes an offline first architecture for collecting and delivering data on mobile devices, the synchronization strategy that reconciles it with a central platform, and lessons learned from its integration with an AI based management system.

Path

Education, experience, certifications and talks, in chronological order.

  1. 2021

    1. EducationSep 2021 to Jun 2024

      Bachelor's degree in Web Informatics

      University of Beira Interior

      Web development, databases, networks and software engineering.

  2. 2022

    1. CertificationNov 2022

      Python Programming Language

      Fundação Bradesco

    2. Certification4 Dec 2022

      Java Programming Language

      Fundação Bradesco, 5 hours

      Fundação Bradesco certificate of completion for Java Programming Language, Basic
      Fundação Bradesco certificate of completion for Java Programming Language, Basic

  3. 2023

    1. ExperienceMar 2023 to Jul 2024

      Full Stack Developer

      STAR Junior Enterprise

      Student run software consultancy at UBI. I built REST APIs with Node.js and MySQL and interfaces with React and Tailwind CSS for real clients.

    2. Certification7 Apr 2023

      Programming Fundamentals

      Rocketseat

      Rocketseat certificate of completion for an introduction to programming, computers and the internet
      Rocketseat certificate of completion for an introduction to programming, computers and the internet
      Verify credential

    3. Certification2 Oct 2023

      Complete Web Development

      Udemy, 115.5 hours

      Udemy certificate of completion for Complete Web Development
      Udemy certificate of completion for Complete Web Development
      Verify credential

    4. Certification13 Oct 2023

      Git and GitHub, Beginner to Advanced

      Udemy, 6 hours

      Udemy certificate of completion for Git and GitHub, Beginner to Advanced
      Udemy certificate of completion for Git and GitHub, Beginner to Advanced
      Verify credential

    5. Event8 Nov 2023

      Shift to Digital

      Shift to Digital, by STAR Junior Enterprise

      Attended STAR Junior Enterprise's event on digital transformation.

      Shift to Digital participant badge with the name Enrico, 8 November 2023
      Shift to Digital participant badge with the name Enrico, 8 November 2023

  4. 2024

    1. Certification2 Mar 2024

      Complete Project with Node.js, React, React Native and TypeScript

      Udemy, 23.5 hours

      Udemy certificate of completion for Complete Project with Node.js, React, React Native and TypeScript
      Udemy certificate of completion for Complete Project with Node.js, React, React Native and TypeScript
      Verify credential

    2. ExperienceOct 2024 to Mar 2026

      Full Stack Developer

      Scribs

      Automated essay correction platform for competitive exams. I built full stack features in TypeScript, Next.js and Node.js, REST APIs and external integrations.

    3. Certification13 Dec 2024

      Agile Methods for Beginners

      Udemy, 6 hours

      Udemy certificate of completion for Agile Methods for Beginners
      Udemy certificate of completion for Agile Methods for Beginners
      Verify credential

  5. 2025

    1. ExperienceSince Jun 2025

      Cofounder & Full Stack Developer

      Pitanga Studio

      Digital studio for companies in Brazil and Portugal. I lead the architecture and development of websites, SaaS platforms, CRMs and integrations.

      pitangastudio.com

    2. ResearchSince Jul 2025

      Research Fellow, HORUS 360IOMS NEXTGEN

      University of Beira Interior

      Offline data collection and delivery platform for the HORUS AI system, which combines language models, agents and mobile interfaces. Supervised by Doctor Sebastião Pais.

    3. EducationSep 2025 to Jun 2027 (expected)

      Master's degree in Computer Engineering

      University of Beira Interior

      Cloud computing, software reliability and artificial intelligence.

  6. 2026

    1. TalkMar 2026

      Autonomous code correction with AI agents

      Talk at STAR Junior Enterprise

      Automatic code repair with Claude AI and GitHub Actions, and how I build digital products with AI, using my own SaaS projects as examples.

    2. LaunchApr 2026

      Claude AutoFix Action

      Failing tests, fixed by AI

      A GitHub Action that steps in when a pull request's tests fail: Claude diagnoses the problem and opens a new pull request with the fix, ready for review.

    3. LaunchJul 2026

      aclara

      Teaching quality measured with AI

      SaaS platform for universities. AI generates assessments from each lesson's material, students answer by QR code and the platform crosses results with satisfaction to show what works.

    4. Talk25 Sep 2026

      DevXpress on Science on Rails

      UBI Science & Innovation Festival

      With Francisco Reis, I brought the DevXpress game on board a train with UBI researchers. Around 100 secondary school students played it during the trip.

      UBI article

  7. Now

    The next chapter could be your project

    I take on a limited number of projects alongside my research, so each one gets full attention.

    Chat on WhatsApp

Technologies

Frontend

  • TypeScript
  • React
  • Next.js
  • Tailwind CSS

Backend

  • Node.js
  • Python
  • FastAPI
  • REST APIs

Data

  • PostgreSQL
  • Supabase
  • MySQL
  • MongoDB

Delivery

  • Git
  • GitHub Actions
  • Docker
  • Vercel

AI

  • Claude API
  • LLM agents
  • RAG

Frequently asked questions

What kind of projects do you build?

SaaS platforms, web applications, internal systems and integrations between tools. I follow the project from product definition to deployment and maintenance.

Which technologies do you work with?

Mainly TypeScript, Next.js, React and Node.js, with PostgreSQL databases. I use Python and FastAPI for data and artificial intelligence services.

Do you work with companies outside Covilhã?

Yes. I work from Covilhã with clients in Portugal and Brazil, remotely or on site when the project calls for it.

Do you build artificial intelligence into products?

Yes. I integrate large language models into concrete features, such as generating assessments from documents, planning schedules or diagnosing and fixing code.

How do we start a project?

Send a message on WhatsApp or by email describing what you need. We schedule a call to understand the goal and I present a proposed technical approach.

Let's talk about your project

WhatsApp is the fastest way. I also reply by email.

Chat on WhatsApp

Covilhã, Portugal