My Full Resume

Lucas Schiavini

Senior Fullstack Engineer | Built software for 2M+ users | AI/ML Products | 6+ years | React, Node, Python, Postgres

Contact

Email: [email protected]
LinkedIn: linkedin.com/in/lucas-schiavini
Website: lucas-schiavini.com
GitHub: github.com/lschiavini

Summary

Senior full-stack engineer who ships production software fast. Six years building AI products, fintech platforms, and mobile apps serving 2M+ users. Recent work includes building regrets.io from concept to 1,300 users in six weeks using vector databases and LLMs, and contributing to trading applications serving over 2 million traders.

Background: Control Engineering degree from the University of Brasília. Published author on robotics education. Won $10,000 at a global pitch competition. Studied decision-making under uncertainty with Nassim Taleb at Real World Risk Institute.

Core stack: React, Next.js, Node.js, NestJS, Python, FastAPI, PostgreSQL, TypeScript. Deep experience with AI/ML integration, vector databases, and mobile development using Kotlin Multiplatform and React Native.

Impact Highlights

Professional Experience

VIVICTUS

Founder
January 2022 – Present

Founder at VIVICTUS, a software development consultancy specializing in full-stack AI-powered applications and rapid product development. Work with startups and established companies across fintech, adtech, and emerging AI domains, architecting scalable systems from 0→1 and shipping production-ready products in weeks, not months.

Core expertise:

  • Full-stack development (React, Next.js, TypeScript, Kotlin, Python)
  • AI/ML integration (LLMs, vector databases, semantic search)
  • Rapid prototyping and MVPs (6-week cycles)
  • Modern infrastructure (PostgreSQL, Supabase, Docker, GCP/AWS)

Select engagements:

  • Built AI-powered platforms serving thousands of users
  • Developed adtech tools and fintech applications for clients in the US and Brazil
  • Shipped production features for platforms with 2M+ active users

Client: ShowSeeker (August 2023 – Present)
Software Engineer (Contract)

Designed and shipped features for Pilot AdTech tools. Several features on the programming and research module. Helped optimize content scheduling and UX for creative teams in media.

Skills: React, TypeScript

Client: Praxent (June 2022 – August 2023)
Software Engineer (Contract)

Developed two full-stack projects for fintech clients. Two banking-as-a-service projects: one for lending with KYC and one for general banking with KYC and KYB.

Skills: Flutter, React, Next.js, NestJS, dotNET, C#

Client: Nelogica (June 2021 – June 2022)
Software Engineer (Contract)

Developed mobile applications for financial institutions in Brazil.

Results:

Skills: Kotlin, Kotlin Multiplatform, Swift

Regrets.io

Founder & Full-stack Developer
August 2024 – Current

Built and launched an AI-powered regret aggregation platform from scratch during Buildspace S5 in 6 weeks. Integrated vector DBs for semantic search, used LLMs to auto-summarize long threads, categorize regrets, and flag duplicates. Wrote all front/back code and led product vision.

Results:

  • Reached 50 DAUs organically
  • 1,300+ user responses collected
  • Launched on Product Hunt

Skills: Vector DB, PostgreSQL, Next.js, PostHog for analytics

PeacePost

Co-founder & CTO
January 2024 – April 2024

Built entire MVP including AI rewriting tools for emotionally intense co-parenting scenarios. Designed UX for conflict-minimizing workflows. Deployed backend with Supabase and integrated OpenAI APIs.

Results:

  • Onboarded first 30 users
  • First paying user in 3 months

Skills: React, Next.js, PostgreSQL, Supabase, Helicone.ai (LLM observability)

Wavio

Software Engineer
January 2021 – June 2021

Full-stack development on social media platform for gaming and networking at the startup.

Results:

  • Over 1,700 users at peak

Skills: React Native, Firebase, Firestore

Core Consulting

Software Engineer
November 2019 – June 2021

Developed mobile and web applications for private and government clients in the health sector in Brazil using the HL7 FHIR standards.

Results:

  • Scheduling software to serve vaccination during COVID in several states in Brazil
  • Two mobile applications developed in React Native and deployed as Android and iOS apps
  • Implementation of APIs to communicate with WSO2 IS
  • Two web portals developed in React JS to serve over 6 million users in the northeast region of Brazil

Skills: Java, Python, HL7 FHIR (format for electronic health records), React, React Native

AllFarmZ

Co-Founder
June 2019 – June 2020

Chief of a Lot of Things at AllFarmZ, doing marketing, editing videos, polishing the pitch for investors, building multiple MVPs.

Results:

  • Won $10K global pitch competition with AllFarmZ (TrepCamp) against more than 500 startups worldwide
  • Built prototype and deck that outperformed 500+ teams

Skills: Investor pitching, viral marketing, MVP development

Universidade de Brasília-UnB

Author and Robotics Teacher
July 2018 – July 2020

Creation of 18 lectures with planning, references, and slides. Content included Arduino, sensors, and robotics projects for children.

Results:

Skills: Arduino, C, Electronics, Presentation, Writing

DROID-UnB

Robot Technician | Software Developer
May 2015 – January 2020

Developing features in C and C++ for various robot systems and microcontrollers (Robotino 2 by FESTO, BeagleBone Blue, Arduino).

Results:

  • 4th and 8th places at Latin American Robotics Competition (LARC)
  • Routing algorithms for Robotino 2

Skills: C, C++, Python, electronics, PCB manufacturing, robotics prototyping

Lucas Schiavini

Content Creator
2015 – Present

Writing blog posts (both technical and non-technical), script writing, making videos, editing, launching small apps via videos. Focused on storytelling for indie hackers, engineers, and meaning-seekers.

Results:

  • Wrote high-performing blog posts (7.6k readers, 12k+ total views) on tech, productivity, regret, and philosophy
  • Produced YouTube videos with 350k+ views total

Skills: Writing, video editing, marketing, technical writing

Education

Real World Risk Institute

2025

Executive Class on Applied Risk and Decision Making with Nassim Taleb, Stephen Wolfram, Raphael Douady, and more.

Key topics included:

  • Skin in the Game incentives
  • Antifragile strategies and optionality
  • Tail risk modeling and fat-tailed distributions
  • Heuristics and decision-making beyond Gaussian frameworks
  • Applications to finance, medicine, engineering, and entrepreneurship
  • Automata and their impact on science with Stephen Wolfram

Universidade de Brasília-UnB

2014 – 2021

Bachelor's in Control and Automation Engineering

Graduation Project: Glove to translate Brazilian Sign Language to text

TrepCamp at UC Berkeley

2019

TrepCamp is the leading training program for aspiring high-impact entrepreneurs that aims to develop entrepreneurial competencies through an Entrepreneurial Simulator in the most innovative ecosystems in the world. Held at University of California, Berkeley.

Award: $10K USD prize for AllFarmZ, a startup that helps farmers get more supplies for their money by buying together

Silent Retreat - Vipassana

2018

10 Day Silent Retreat

Techniques Studied: Anapana, Vipassana, Metta Bhavana

I consider this to be the biggest mental achievement I have had so far.

Extracurricular

Skills

Languages & Frameworks
TypeScript, Kotlin, Python, C/C++, Dart, Swift
React, React Native, Next.js, Flutter, NestJS, Node.js

Infrastructure & Tools
Docker, PostgreSQL, Redis, Supabase, Firebase, GCP, AWS

Other
Kotlin Multiplatform, Vector DBs, AI/LLM integration, DevOps basics, RISC-V, Verilog

Languages

Portuguese: Native
English: C1
Others: Italian, Japanese, Spanish