expedition
Narrative portfolio with localized routes and themed visuals.
EXPEDITION 25
Jonathas
Oliveira
« Kaironn »
Developing solutions for those who come after
Mining some data...
2+ yearsJourney time
2Production projects
Python - TypeScriptCurrent stack
I.
About
- Field profileSoftware engineer with 2+ years of experience, specialized in Python, automation, large-scale data extraction, and distributed systems.
I currently work with data extraction and processing pipelines, focusing on performance, scalability, and operational cost reduction. Key results include:
- Up to 90% reduction in execution time for extraction processes
- Optimized flows with more than 100 thousand items, reducing from 9 to 4 requests per item
- Over 50% reduction in infrastructure consumption through architecture and request-flow improvements
I also have experience building backend and frontend applications with technologies like TypeScript, Django, React, and Next.js.
In my free time, I contribute to the modding community by localizing games from English to Portuguese, currently reaching 100 thousand downloads. From that experience, I built Icosa, a desktop application made with Electron + TypeScript to support translation workflows for Baldur's Gate 3 files.
The project has already helped 500+ translators around the world, offering tools for translation management, dictionaries, and localization workflows.
II.
Career
- Combat recordCURRENTMar 2026 - Present · Remote
Software Engineer
Data OpportunityEngineering large-scale data extraction systems with focus on performance, reliability and external API integration.
- Optimized scraping pipelines by up to 90%, cutting runs from roughly 20min to 2min and from 3h to 20min.
- Refined a 104,000-item workflow by reducing requests per item from roughly 9 to 4, cutting infrastructure usage.
- Built FastAPI webhooks and integrated external APIs for service-to-service communication.
- Created validation and normalization routines to raise data consistency and ingestion quality.
- Python
- FastAPI
- Scrapy
- Postgres
- Redis
- Digital Ocean
- Docker
Level4Oct 2025 - Mar 2026 · Internship
Software Engineering Intern
Data OpportunityContributed to data extraction and processing workflows, supporting pipeline maintenance and routine organization.
- Developed and maintained workflows using Python and Scrapy.
- Analyzed internal requests and implemented quality-focused automation.
- Supported pipeline maintenance and extraction processes.
- Python
- Scrapy
- SQL
- Git
Level3Sep 2025 - Dec 2025 · Remote
Volunteer Software Engineer
ONG GabrielREST APIs, SPA/SSR frontend and containerized infrastructure for a non-profit.
- REST APIs and backend services with Django/DRF.
- SPA/SSR frontend with TypeScript and Next.js, integrating dynamic CMS content.
- Refactored architecture for scalability and maintainability.
- Containerized stack with Docker, Compose and Traefik.
- Django
- Next.js
- TypeScript
- Postgres
- Docker
- Traefik
- Hostinger
Level2May 2024 - Oct 2025 · Feira de Santana, BA
Automation Developer
Loja Sangue LatinoAutomation workflows and data pipelines impacting logistics, support and finance.
- Automated 90% of shipment tracking across 4 carriers, eliminating 6h/day of manual work.
- ETL workflows for invoice and freight auditing, improving cost analysis.
- Automated email and WhatsApp notification systems cutting transport-related support by more than 50%.
- Operational automations with Google Apps Script and real-time integrated spreadsheets.
- Python
- Selenium
- lxml
- Apps Script
- Office 365
Level1
III.
Skills
- ArsenalMastery scale
- I · Apprentice
- II · Practitioner
- III · Expeditioner
- IV · Artificer
01Frontend
TypeScriptIII · Expeditioner1 year and 1 monthEnd-to-end typing across Next.js frontends and the Icosa desktop app.
- ONG GabrielTyped SPA/SSR frontend for the platform.
- ExpeditionTyped content layer.
- pt/en content validated at build time
- IcosaElectron main and renderer processes.
- Localization file parser
- Typed local dictionaries
ReactIII · Expeditioner1 year and 1 monthComponents and state in SPA/SSR interfaces.
- ONG GabrielNon-profit platform UI.
- ExpeditionPortfolio components.
Next.jsIII · Expeditioner1 year and 1 monthApp Router, localized routes and SSR in production.
- ONG GabrielSSR in production.
- ExpeditionNext.js 15 with App Router.
- Localized pt/en routes
JavaScriptIII · Expeditioner2 years and 5 monthsFrom operational automations and web app reverse engineering to interfaces.
- Sangue LatinoGoogle Apps Script.
- Real-time integrated spreadsheets
- ONG Gabriel
- Data OpportunityReverse engineering web apps to map routes and requests for data extraction.
- Expedition
- Icosa
Tailwind CSSIII · Expeditioner1 year and 4 monthsUtility-first styling across web platforms and the Icosa desktop app.
- ONG GabrielNon-profit platform styling.
- ExpeditionPortfolio visual theme.
- IcosaDesktop app interface.
ElectronII · Practitioner1 year and 4 monthsOffline desktop app for translating Baldur's Gate 3 mods.
- IcosaDesktop app with offline sync.
- Mod file management
- Localization workflows
02Backend
PythonIII · Expeditioner2 years and 5 monthsMain language: automations, crawlers, APIs and large-scale data extraction.
- Sangue LatinoLogistics, support and finance automations.
- Web scraping to collect logistics data
- Data OpportunityLarge-scale extraction systems.
- Crawlers and custom team tooling
- Webhooks and APIs with Django and FastAPI
- Data validation and normalization
FastAPIIII · Expeditioner7 monthsIntegration APIs and webhooks for extraction systems.
- Data OpportunityIntegration APIs and webhooks.
- Webhook receiving notifications from an external service
DjangoII · Practitioner1 year and 1 monthREST APIs, webhooks and admin panels.
- ONG GabrielREST API and admin.
- Data OpportunityWebhooks and internal APIs.
RESTIII · Expeditioner1 year and 1 monthDesign and integration of internal and external APIs.
- ONG GabrielPlatform APIs.
- Data OpportunityAPIs, webhooks and external API integration.
PydanticIII · Expeditioner7 monthsData modeling and validation in Python services.
- Data Opportunity
SQLAlchemyIII · Expeditioner1 year and 4 monthsORM and data access layer for Python applications.
- Data Opportunity
- IcosaPersistence in the initial version.
GoI · Apprentice2 monthsStudying the language for backend services.
- Personal study
- Sangue LatinoLogistics, support and finance automations.
03Data & Infra
PostgreSQLIII · Expeditioner1 year and 1 monthMain relational database in production.
- ONG GabrielNon-profit platform database.
- Data OpportunityData ingestion and consumption across several applications.
SQLIII · Expeditioner1 year and 4 monthsModeling and queries for data ingestion and normalization.
- ONG Gabriel
- Data Opportunity
- Icosa
RedisIII · Expeditioner1 year and 1 monthCaching and rate limiting in production.
- ONG GabrielCaching for the most accessed content and rate limit lists.
- Data OpportunityCaching and rate limiting over TLS.
DockerIII · Expeditioner1 year and 1 monthContainerized Compose stacks, from development to production.
- ONG GabrielContainerized Docker Compose stack.
- Data OpportunityPipeline containers.
NginxII · Practitioner1 year and 1 monthWeb server and reverse proxy in production.
- ONG Gabriel
- Data Opportunity
Digital OceanII · Practitioner7 monthsProduction infrastructure for extraction pipelines.
- Data Opportunity
AWSII · PractitionerTime in use not trackedCloud compute and storage services.
- Personal study
04Scraping & RPA
ScrapyIII · Expeditioner1 yearExtracting and crawling millions of records daily.
- Data OpportunityProduction spider engineering.
- Millions of records per day
- Performance and reliability
- Ingestion validation routines
curl-cffiIII · Expeditioner1 yearBrowser fingerprint (TLS/HTTP) impersonation in data extraction requests.
- Data Opportunity
lxmlIII · Expeditioner2 years and 5 monthsHTML and XML parsing in automations and extraction.
- Sangue LatinoOperational automations.
SeleniumIII · Expeditioner2 years and 5 monthsBrowser automation for RPA and collection that requires a real session.
- Sangue LatinoOperational routine automation.
- Data OpportunityCookie collection and browser-based RPA.
PlaywrightIII · Expeditioner2 years and 5 monthsBrowser automation for dynamic pages and complex flows.
- Sangue LatinoOperational routine automation.
- Data OpportunityCookie collection and browser-based RPA.
Distributed CrawlingIII · Expeditioner1 yearLarge-scale extraction focused on throughput and infrastructure usage.
- Data OpportunityScraping pipeline optimization.
- Runs up to 90% faster
- 104k-item workflow with fewer requests
ETL PipelinesII · Practitioner2 years and 5 monthsExtraction, transformation and loading of operational data.
- Sangue LatinoAuditing ETLs.
- Invoices and freight
- Data OpportunityIngestion validation and normalization.
- Data OpportunityProduction spider engineering.
05Architecture & Messaging
Distributed SystemsII · Practitioner6 monthsDistributed systems fundamentals and service-to-service communication.
- Personal study
Task QueuesII · Practitioner6 monthsAsynchronous processing with task queues.
- Personal study
System DesignII · Practitioner6 monthsDesigning scalable and maintainable architectures.
- Personal study
CeleryII · Practitioner6 monthsWorkers and asynchronous tasks in Python.
- Personal study
RabbitMQII · Practitioner6 monthsMessaging and queues between services.
- Personal study
06Tooling & Environment
GitIII · Expeditioner1 year and 4 monthsVersion control across every project and team workflow.
- ONG Gabriel
- Data Opportunity
- Expedition
- Icosa
LinuxIII · Expeditioner1 year and 1 monthServers and deployment environments for containerized stacks.
- ONG Gabriel
- Data Opportunity
PytestIII · Expeditioner1 yearAutomated testing in Python projects.
- Data Opportunity
uvIII · Expeditioner1 year and 1 monthPython environment and dependency management.
- ONG Gabriel
- Data Opportunity
AlembicII · PractitionerTime in use not trackedSchema migrations with SQLAlchemy.
- Personal study
CI/CDII · Practitioner1 year and 1 monthContinuous integration and delivery pipelines for testing and deployment.
- ONG GabrielAutomated testing and deployment.
- Data OpportunityAutomated testing and deployment.
1y 2mTime in use3Workplaces and projects where I used itHover for details · click to pin
IV.
Projects
- Production artifactsLv. 9hover Lv. 9hover Icosa
Desktop tool for Baldur's Gate 3 mod translators - manages files, dictionaries, and localization workflows.
Lv. ?hover
V.
Academic
- AcademySoftware Engineering
Gran Faculdade
Jul 2025 - Jul 2029 · In progressProgress
VII.