Archived
ACAT
First project ever — a step-by-step trigonometry solver in C# (2011)
Case studyMarcos Nespolo
AI Product Engineer
Coding since 2011 · Product Engineer for B2B SaaS · Applied AI postgrad
15+Years coding
5Years building B2B SaaS
Featured projects
Side projects, end-to-end
Solo builds where I explore Applied AI in real product contexts. Designed, coded and shipped end-to-end.
In progress
Lume
Exploring AI tools for clinical workflows
- Concept exploring RAG for clinical context
- Designed and prototyped end-to-end
- Solo build, fully owned
Next.jsClaude APIPostgrespgvector
Archived
Atlantis
Aquarium fish-compatibility recommender · UFPR graduation project
- Curated fish-species database
- Compatibility checks across tank conditions
- Built during graduation at UFPR
ReactNode.jsPostgres
Production
HamonizAi
Wine recommender by food pairing — classical NLP, no LLMs
- spaCy + rapidfuzz pipeline parses free-text queries
- 1,688 wines scored on 4 transparent components
- 101 dishes hand-curated from sommelier literature
PythonspaCyFastAPISQLiteNext.js
Journey
A trajectory told in moments
Not a timeline. Just the moments that shaped how I work.
Experience
Career timeline
Roles, companies, and how the stack evolved.
Troquecommerce
Frontend → Full-Stack → Product Engineer
2021 — presentCurrent
~5 years- Led discovery meetings with enterprise clients, translating feedback into technical specifications and roadmaps
- Owned UI/UX and full-stack architecture, from the MVP to optimizing REST APIs and database structures
- Authored technical documentation for APIs and integrations, and facilitated agile ceremonies to align product and engineering
- Mentored developers and scaled the platform, which today serves 1,800+ customers as the segment leader in Brazil
TypeScriptNext.jsReactNode.jsSupabasePostgreSQLTailwind
Nelogica
Frontend Developer · Home Broker (crypto)
2022
8 months- Built the frontend for a new Home Broker product focused on the cryptocurrency market
- Ensured minimal latency and high performance in a mission-critical system with thousands of simultaneous users
- Shipped new features on a weekly basis, collaborating directly with UI/UX teams
JavaScriptVue.jsSCSSHTML5
LinkYou Software
Python Developer
2021
4 months- Built Python microservices for order tracking, integrating e-commerce APIs, ERPs, and shipping carriers
- Led the redesign of the company's visual identity, combining development and design skills
PythonMicroservicesDesignREST APIs
Brazilian Army
3rd Sergeant — IT Section (last 3 years)
2014 — 2021
8 years- Managed IT infrastructure for 3 years, administering Linux systems, virtual machines, and backup routines
- Developed two mission-critical internal systems (Django and PHP/MySQL) to streamline unit operations
- Served as an instructor, helping train ~720 soldiers and 110 corporals in high-pressure environments
LinuxDjangoPHPMySQLIT Infrastructure
IFPR · CNPq Junior Researcher
Full-Stack Web Developer
2012 — 2013
1 year- Contributed as a researcher and developer to AVIAO (Intelligent Virtual Environment for Guided Learning)
- Implemented dynamic AJAX-based interfaces, gaining early practical experience with UI ergonomics
JavaScriptjQueryPHPSQLHTML5CSS3
Volunteer work
Outside the keyboard
2025
Rotaract Club
Treasurer
Treasurer of the local club. Coordinated finances for community service projects.
2023 · 8 months
WWOOF New Zealand
Wwoofer
Two host stays — Hare Krishna community in Wellington (vegan kitchen) and a French family near Christchurch. Built a car-booking system for the temple.
2020
ACRIDAS
Volunteer
Donations campaign for at-risk children at the Christian Association of Social Assistance, Curitiba.
2016
TETO (TECHO)
Volunteer · Coleta
One-day fundraising mobilization for TETO's housing programs.
Education
Academic background
Five programs across federal universities and military training.
Universidade Federal do Paraná (UFPR)
Postgraduate · Applied Artificial Intelligence
2024 — 2025A · 90/100
- Machine learning, deep learning, and Big Data tooling with Python and R
- Computer vision and end-to-end ML projects with TensorFlow
- Ethics and societal impact of AI systems
Universidade Federal do Paraná (UFPR)
Postgraduate · Agile Software Development
2024 — 2025A · 94/100
- Agile methodologies, software architecture, automated testing
- DevOps with CI/CD pipelines and continuous deployment
- Web and mobile delivery with strong UX focus, grounded in real case studies
Universidade Federal do Paraná (UFPR)
Associate Degree · Systems Analysis and Development
2018 — 2023
- Scrum/Kanban, NoSQL, governance; Java, PHP, C, React Native
- Capstone: full-stack React + Node.js + MongoDB system
- User-centered design as a guiding lens
Brazilian Army Sergeant School
Sergeant Technician · Army Material (Metallurgy)
2014 — 2015
- Metallurgy, weapon-system maintenance and fabrication
- Military logistics and operations under pressure
- Leadership, discipline, and teamwork as core values
Instituto Federal do Paraná (IFPR)
Technician · Computer Science / Software Development
2011 — 2013
- Databases, programming (C, Java, PHP, HTML/CSS, OOP), UML
- Built ACAT in C# — 1st place, Innovation, IFPR's first Science Fair
- Deployed a Samba server at the database lab for student collaboration
Skills
Day-to-day stack
Tools and frameworks I reach for. Not a coursebook list.
AI / ML
Claude APIOpenAI APIVercel AI SDKRAGpgvectorZod
Frontend
TypeScriptReactNext.jsTailwind CSSshadcn/uiMotion
Backend
Node.jsPythonSupabasePostgreSQLREST APIs
Cloud / DevOps
VercelDockerGitHub ActionsLinux
Tools
GitFigmaLinearCursorGitHub