Interactive Lesson Systems
Modern web-based lessons with answer checking, drag-and-drop tasks, matching, quizzes, feedback, and responsive layouts.
Services
What I can build for you
I combine frontend development, language pedagogy, translation/localization, interpretation, and AI language evaluation into one practical niche: interactive learning products.
Placement Tests and Quizzes
Self-grading tests with timers, scoring logic, CEFR bands, answer feedback, and study-plan output.
Learning Platform MVPs
SaaS-style education products with lesson routes, dashboards, progress tracking, payments, and content systems.
AI Content Workflows
Prompt systems, JSON lesson templates, automated lesson generation, multilingual review, and localization workflows.
Why this mix works
Development, teaching, languages, and delivery in one workflow
Most language-learning products need more than a developer who can assemble screens. They need someone who understands how learners get stuck, how multilingual content should be reviewed, how AI language output should be evaluated, and how to turn that into a working product. My mix of software development, tutoring experience, multilingual background, and full-stack delivery lets me build tools that are practical for learners and realistic to maintain.
Selected projects
Educational tools, language systems, and practical web products
OiTutor Nihongo
A Japanese learning product with structured beginner progression, interactive exercises, skill-tree navigation, authenticated progress sync, and a student dashboard.
Built with React, Vite, Supabase, Express, Stripe, Nginx, PM2, and JSON-based lesson architecture.
LearnWithLyrics
Built a song-based language learning project that turns lyrics into focused vocabulary, listening, and comprehension practice.
OiTutor Website
Built a responsive tutoring platform with lesson samples, pricing, interactive revision exercises, booking integration, embedded video, and Netlify deployment.
English Placement Test
Built a 90-question English placement test with countdown timer, automatic scoring, CEFR level output, instant feedback, and study-plan logic.
Interactive Lesson Builder
Created a reusable interactive lesson system that turns lesson content into drag-and-drop exercises, matching tasks, and student-facing revision activities.
AI Lesson-Prompt Generator
Built a Python/Bash CLI tool that generates structured AI lesson prompts from JSON templates, reducing lesson-planning time and standardizing output quality.
JP to PL Import Calculator
Built a responsive utility that calculates product landed cost across PLN, USD, and JPY with a clean browser interface.
Medical Glossary
Published a reference book with nearly 1,000 medical terms for interpreters and language professionals.
OiTutor Nihongo turns a beginner Japanese curriculum into a hosted learning product with lesson routes, reusable exercise types, authenticated progress, XP, achievements, completion screens, and a student dashboard. The implementation proves the product layer too: lazy-loaded JSON lessons, React/Vite routing, Supabase user data, an Express API, Stripe billing, and VPS deployment with Nginx and PM2.
Tech stack
Skills shaped around EdTech delivery
Front-End
ReactJavaScriptHTML5CSS3TailwindResponsive UIInteractive Exercises
Backend and Scripting
Node.jsExpressPythonBashJSON WorkflowsAPI Integration
EdTech and Learning Systems
QuizzesCEFR ScoringLesson BuildersProgress TrackingPlacement TestsDrag and Drop
AI and Language Workflows
AI Language EvaluationPrompt WorkflowsMultilingual QALocalization ReviewAI Content ValidationLanguage-Data Assessment
Experience
Audio and Native Language AI Evaluation Specialist
micro1 - Remote
Sep 2025 - Feb 2026
- Reviewed multilingual AI audio and language data for quality, fluency, pronunciation, and linguistic accuracy.
- Supported AI model improvement through native-language judgment and structured feedback.
Freelance Language Tutor - English, Portuguese, Spanish
Self-employed
2017 - Present
- Delivered lessons to adult learners and designed custom materials, revision exercises, and learning workflows.
- Used classroom experience to build interactive EdTech projects, placement tests, and lesson tools.
Freelance Python Developer
Self-employed
Jan 2022 - Dec 2024
- Built Python scripts and CLI tools for automation, content generation, and educational workflows.
- Created JSON-based prompt systems and small web utilities using JavaScript, Python, and responsive interfaces.
Portuguese OPI/VRI Interpreter
Voyce and GLOBO
May 2022 - Mar 2025
- Provided remote Portuguese interpretation in medical and general-service settings with compliance-focused workflows.
Translator and Localization Contributor
Yeehe, Transifex, and freelance projects
2017 - 2024
- Worked on game localization, open-source translation, Bitcoin/PIVX materials, and Brazilian Portuguese content adaptation.
English Teacher
Skyeng
Sep 2018 - Feb 2022
Verified credentials
Relevant certifications
28+ certifications across languages, teaching, IT, Linux, security, and healthcare interpretation.
- English C2 - Oxford Online Placement Test C2: Proficient
- Polish B1 State Exam - Certified in December 2023
- Russian B2 - Pushkin State Russian Language Institute
- EF SET C2 - English Certificate C2 Proficient, 76/100
- Law degree - Unifacisa Centro Universitario
Bachelor's Degree - Law
Unifacisa Centro Universitario - Campina Grande, Brazil
2012 - 2017
View full credentials Full list
Language Certifications 5
- EF SET English Certificate C2 Proficient - Mar 2025 - Score: 76/100
- Oxford Online Placement Test C2: Proficient - Mar 2022
- Oxford Online Placement Test C1: Advanced - Jun 2019 - ID: 4701600
- Polish State Exam Certificate B1 - Dec 2023
- Russian Language Certificate B2 - Pushkin State Russian Language Institute - Feb 2017
Teaching, Interpretation, and Healthcare 7
- Language Teaching Methodology - Preply - Jun 2025
- Medical Specialty Series: Obstetrics and Gynecology - Voyce - Oct 2024
- Medical Specialty Series: Cardiology - Voyce - Sep 2024
- HIPAA and Fraud, Waste and Abuse - Voyce - Jul 2024
- PIPEDA and PHIPA - Voyce - Jul 2024
- Medical Interpreter Orientation and Compliance Training - Feb 2022
- Medical Interpretation Training - Oct 2021
IT, Security, and Linux 14
- SIEM Fundamentals - Google Cloud Security - Apr 2025
- Linux Networking and Administration (LFS211) - Jun 2024
- Cybersecurity Essentials (LFC108) - May 2024
- LPI Security Essentials (020-100) - Sep 2023
- CompTIA Network+ - Jun 2023
- Python for Penetration Testing - Jun 2023
- Hacking Wireless Networks - Theory and Practice - May 2023
- Endpoint Detection and Response - Apr 2023
- PCI Compliance - Apr 2023
- Policy Compliance (IT) - Apr 2023
- Vulnerability Management Detection and Response - Apr 2023
- Vulnerability Management Foundation - Apr 2023
- Introduction to Python and Hacking with Python - Feb 2022
- Cyber Security Volumes 1-4 - Jan 2021
Blockchain and Web3 9
- Cryptography and Privacy Coins - Apr 2020
- Ethereum Smart Contract Programming 201 - Apr 2020
- Ethereum Smart Contract Security - Apr 2020
- Bitcoin Attacks - Mar 2020
- DeFi 101 - Mar 2020
- Ethereum Smart Contract Programming 101 - Mar 2020
- JavaScript Programming for Blockchain Developers - Mar 2020
- Blockchain and Bitcoin 101 - Feb 2020
- Ethereum 101 - Feb 2020