Disponível para oportunidades full-stackCuritiba, Brazil 🇧🇷

Guilherme
Kadubitzki

Desenvolvedor full-stack focado em sistemas backend prontos para produção. Construo APIs com TypeScript, NestJS, PostgreSQL e filas assíncronas.

Ver projetos Falar comigo

kadubitzki ~ zsh

interactive shell

➜ ~ whoami

Guilherme Moczedlo Kadubitzki Engenheiro Full Stack: NestJS e Next.js Curitiba, Brasil 🇧🇷

➜ ~ stack

Backend: NestJS, Node.js e Python Frontend: React 19, Next.js 15 e TypeScript Data: PostgreSQL, Prisma, BullMQ e Redis Ops: Docker, GitHub Actions e Linux

Press to open the full shell

FULL STACK

NESTJS

REACT 19

NEXT.JS 15

TYPESCRIPT

POSTGRESQL

PRISMA ORM

BULLMQ

REDIS

DOCKER

PYTHON

TAILWIND CSS V4

FRAMER MOTION

GSAP

FULL STACK

NESTJS

REACT 19

NEXT.JS 15

TYPESCRIPT

POSTGRESQL

PRISMA ORM

BULLMQ

REDIS

DOCKER

PYTHON

TAILWIND CSS V4

FRAMER MOTION

GSAP

FULL STACK

NESTJS

REACT 19

NEXT.JS 15

TYPESCRIPT

POSTGRESQL

PRISMA ORM

BULLMQ

REDIS

DOCKER

PYTHON

TAILWIND CSS V4

FRAMER MOTION

GSAP

FULL STACK

NESTJS

REACT 19

NEXT.JS 15

TYPESCRIPT

POSTGRESQL

PRISMA ORM

BULLMQ

REDIS

DOCKER

PYTHON

TAILWIND CSS V4

FRAMER MOTION

GSAP

[TRABALHOS SELECIONADOS]

Projetos

Projetos reais em que trabalhei no setor público, produtos SaaS, mercado de carbono e automação de processos industriais.

01● LIVE

Public Sector / Social[2025-06] STATUS: shipped to productionperiod: 2024 – 2025

Sistema ELLAS

Collaborative platform built across 12+ public institutions to store, analyze, and share critical data on violence against women.

git log --oneline -n 3hover preview

a3f8c12feat: state-wide pilot deployment approved2w ago

9e1b047fix: role-scoped encryption edge case1mo ago

c72d3aefeat: FIciências 2025 presentation build3mo ago

[ INSPECT SYSTEM ]

Partner Institutions12+

FIciências Selection2024 & 2025

Adoption StatusState Pilot

Dependencies

TypeScriptNestJSPostgreSQLPrisma ORMNext.jsReactTailwind CSSDocker

Role: Full Stack Developer & Relational Database Architect

02● BUILDING

SaaS[2024-08] STATUS: active developmentperiod: 2024 – Present

Multi-Tenant SaaS Engine

Modular monorepo architecture featuring tenant isolation, asynchronous queues, and automated multi-channel integrations.

git log --oneline -n 3hover preview

f1a9e34feat: Anthropic Claude integration for AI workflows3d ago

b82c551fix: idempotent webhook retry logic1w ago

7dc0f29chore: Docker multi-stage build optimization2w ago

[ INSPECT SYSTEM ]

ArchitectureMonorepo

Queue EngineBullMQ + Redis

Tenant IsolationMulti-Tenant

Dependencies

NestJSTypeScriptPostgreSQLPrisma ORMBullMQRedisNext.jsDockerGitHub ActionsMercado Pago APIFocus NF-eEvolution API

Role: Sole Creator & Full Stack Architect

03● ARCHIVED

SaaS[2022-09] STATUS: legacy buildperiod: 2022

Munip: Carbon Credit Platform

Digital platform designed to streamline carbon offset transactions between industrial emitters and rural land preservers.

git log --oneline -n 3hover preview

3bc7d81feat: FIciências 2022 demo build2022

e14a920feat: carbon capture calculator v12022

0f5c348init: project scaffold + DB schema2022

[ INSPECT SYSTEM ]

RecognitionFIciências 2022

AwardFull Merit Scholarship

Dependencies

TypeScriptReactNode.jsExpressPostgreSQLTailwind CSS

Role: Co-Founder & Technical Lead

04● ARCHIVED

Automation[2024-03] STATUS: legacy buildperiod: 2023 - 2024

Polisul Process Automation Suite

Custom data transformation scripts and automated internal reporting pipelines eliminating administrative bottlenecks.

git log --oneline -n 3hover preview

9a2f17cfeat: executive report auto-generator2024

d5c8b03fix: missing-field resilience in ETL pipeline2024

4e1a769feat: operational bottleneck mapping scripts2023

[ INSPECT SYSTEM ]

Manual ErrorsMinimized

DomainIndustrial Packaging

Dependencies

PythonPandasAutomation ScriptsData ProcessingExcel / CSV Pipelines

Role: Administrative Assistant: Process Automation

[ VER TODOS OS PROJETOS ]

[STACK DO SISTEMA]

Tecnologias

Ferramentas que utilizo na rotina de desenvolvimento para criar software estável e de fácil manutenção.

Backend Architecture & Systems

TypeScriptNestJSNode.js / ExpressPythonJava / Spring Boot

Databases, Queues & DevOps

PostgreSQL & MySQLPrisma ORM & TypeORMBullMQ & RedisDocker & LinuxGitHub Actions & CI/CD

Frontend Engineering & UI

Next.js (App Router)React 19 & ViteTailwind CSS v4Framer Motion & GSAPshadcn/ui & Figma

APIs & Third-Party Integrations

Anthropic Claude APIMercado Pago APIFocus NF-eEvolution API (WhatsApp)Resend & Cloudflare R2

[REGISTRO DE LOGS]

Experiência

Desenvolvendo e entregando código em produção desde 2023, dividindo o tempo entre software público, automação de fábrica e SaaS.

Full Stack Developer

Independent Projects & Freelance

2024 - PresentCuritiba, Brazil (Remote)

Independent engineering of multi-tenant SaaS platforms, monorepo architectures, and bespoke web applications for small and medium businesses.

→Engineered an independent monorepo SaaS core with shared auth modules, multi-tenant database isolation, notifications, and async queues using NestJS, Prisma, PostgreSQL, BullMQ, and Redis.
→Designed and delivered custom full-stack web applications and internal management portals for SMEs focusing on lighthouse performance and maintainability.
→Managed full Software Development Life Cycle (SDLC): data modeling, API contracts, unit/integration testing strategy, and production deployments via Docker and GitHub Actions CI/CD.

TypeScriptNestJSReactNext.jsPostgreSQLPrismaBullMQRedisDockerGitHub ActionsTailwind CSS

Administrative Assistant: Process Automation

Polisul Indústria e Comércio de Embalagens Ltda.

2023 - 2024Curitiba, Brazil

Workflow mapping and internal process automation through custom Python software engineering.

→Mapped operational bottlenecks and administrative inefficiencies across manufacturing plant routines through thorough workflow analysis.
→Independently engineered Python automation scripts for operational data cleaning, formatting, and executive report generation.
→Reduced execution cycle times for repetitive tasks while eliminating manual keying errors across administrative teams.

PythonData ProcessingWorkflow AutomationSQLExcel Pipelines

[ LINHA DO TEMPO COMPLETA ]

[PROTOCOLO DE CONEXÃO]

Let's build
something
real.

Envie uma mensagem direta para conversar sobre vagas full-stack, arquitetura backend em NestJS ou consultoria técnica.

Falar comigo kadubitzkig@gmail.com

GuilhermeKadubitzki

Projetos

Sistema ELLAS

Multi-Tenant SaaS Engine

Munip: Carbon Credit Platform

Polisul Process Automation Suite

Tecnologias

Backend Architecture & Systems

Databases, Queues & DevOps

Frontend Engineering & UI

APIs & Third-Party Integrations

Experiência

Let's buildsomethingreal.

Guilherme
Kadubitzki

Let's build
something
real.