Beyond his day job, Marcio builds his own products. EvCopilot, FormDaily, TargUp and marciomariani.dev already have public sites, and FictionDraft is still a concept. Ask about any of them — I'll be clear about what's live versus planned.
EvCopilot
Electric mobility · Brazil
A trip-planning app for electric-vehicle drivers in Brazil: compatible chargers, predicted battery at every stop and a backup charger for each one.
Key features
- Chargers filtered by connector and power
- Battery prediction per stop
- Backup charger for every stop
- Offline itinerary
- Handoff to Apple Maps, Google Maps or Waze
- Station status with source and date
Platforms
- iPhone (beta)
FormDaily
Fitness & coaching
A workout app for personal trainers and their students: trainers build workouts, run sessions and track progress; students follow their plan and log every set.
Key features
- Workout builder with loads, rest and videos
- Scheduling with Google Meet for online sessions
- Live session tracking, even offline
- AI workout suggestions reviewed by the trainer
- Student progress charts
- Verified trainer badge
Platforms
- Web
- iOS
- Android
TargUp
Business automation
A business automation platform that replaces repetitive manual work with connected workflows, AI-assisted automation and operational visibility.
Key features
- Workflow automation
- AI that classifies, drafts and recommends within business rules
- Integrations and analytics
- Role-based permissions and human approval
- WhatsApp appointment booking
- Chat, Social and Affiliate products
Platforms
- Web
marciomariani.dev
AI assistant · this site
This portfolio: an AI assistant that answers questions about his work from his résumé and his own notes, citing its sources for every answer drawn from his record.
Key features
- Instant answers to the questions it recognizes
- An OpenAI model for everything else
- A closed list of validated tools
- Retrieval over embeddings of his record
- Sources cited with each answer from his record
- Usage and cost limits
Platforms
- Web
Main technologies
- Next.js
- React
- TypeScript
- Tailwind CSS
- OpenAI
- Vitest
- Playwright
Outcomes
- Every pull request must pass Lighthouse CI on the home page: 100 for accessibility and SEO, at least 90 for performance.
- Its architecture is enforced in CI: dependency rules reject any import that crosses a layer the wrong way, and the core and its adapters carry coverage thresholds.
FictionDraft
AI writing & publishing
An AI writing assistant for novels, books, documents and scripts: a template for each kind of text, with an AI that checks it against what was already written.
Planned scope
- Editing
- Review
- Translation
- Document consistency
The engineering behind them
- EvCopilot — The engineering question is heterogeneous data and correctable predictions: charger data from Open Charge Map and OCPI, routes with compatible stops, and consumption learned from real trips with the driver’s consent.
- FormDaily — He models trainers, students, exercises, sessions and progression, computes the metrics on the backend and lets AI interpret them — never invent loads — with the trainer reviewing anything critical. Beta builds went out through TestFlight in 2026.
- TargUp — A study in reliable asynchronous workflows: campaigns created, scheduled, queued, attempted and confirmed, with idempotency keys and retry policies so a provider timeout never means a duplicate send.
- marciomariani.dev — A study in grounding a language model: it acts only through a closed list of validated tools, retrieves facts by embeddings with source tags and a relevance floor, and an offline evaluation has a second model grade its answers claim by claim against the evidence.
- FictionDraft — Explores document versioning, role-based editorial permissions, review and translation, and asynchronous import and publishing jobs.
Suggested questions