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João Vitor Rodrigues dos Santos

@joovitorrodriguesdos

Full-stack engineer at TyviaTalk building Tevio's VPS provisioning and AI modules for SaaS products.

At TyviaTalk, I co-founded and work across Tevio, TyviaTalk, and SinceMarket. For Tevio, I contributed about 97% of the commits, including automated VPS provisioning on Proxmox, recurring billing, and generative AI modules with streaming, LLM fallback, persistent context, and Whisper transcription.

At SIMCO Informática, I support customers and develop fixes and features for a C#/.NET ERP, including Brazilian tax integrations. I also built a production CRM for a freelance client and worked on my own SaaS projects, including SaciaBem, with tenant isolation through PostgreSQL RLS and more than 100 migrations.

Experience

Work history, roles, and key accomplishments

Current

Co-founder & Full-Stack Engineer

Current

TyviaTalk

Mar 2026 - Present (7 months)

Co-founder of TyviaTalk, in parallel with SIMCO. Products: Tevio (server sales), TyviaTalk (omnichat for businesses, integrated with AI that learns from the company and improves with use) and SinceMarket (marketplace for games, game servers and digital products).

Tevio, about 97% of commits (1,410 of 1,454):
- Storefront with cart and checkout, customer portal and admin panel on Node.js/Express 5

Current

Support Analyst | QA and C#/.NET Development

Current

SIMCO Informática

May 2025 - Present (1 year 5 months)

ERP for auto parts stores, repair shops and retail. I work where the customer meets the code: I support, reproduce, test, document and fix.

- Build features and fixes in the C#/.NET ERP, including integrations with Brazilian tax systems (NF-e/SEFAZ).
- Run QA on every release before delivery: test execution, flow validation and root-cause analysis.
- Write bug reports for the development team wit

Full-Stack Developer (Freelance)

Freelance

Mar 2026 - Sep 2026 (6 months)

Full-stack CRM with landing page and CMS for an independent professional in the aesthetics field, in production and used daily by the client.
- Turborepo monorepo with an Express 5 API, Prisma, PostgreSQL 16, Redis and Socket.IO, a Next.js CRM and the landing page; 20 data models.
- Google Calendar, Google Business Profile and WhatsApp Business integrations; LGPD-compliant lead capture with consen

Full-Stack Developer (Pro bono)

Pro bono

Jun 2026 - Aug 2026 (2 months)

Editorial portfolio with a CMS dashboard for a fashion professional, as volunteer work (Next.js, Supabase with RLS, content editor with sanitized HTML, integration tests and CI).

ERP Support Intern

SIMCO Informática

Jun 2024 - Apr 2025 (10 months)

- Supported ERP customers by investigating errors in tax invoices (NF-e) and master data.
- Supported training and usage guidance for customers and internal teams.
- Logged incidents and followed tickets to resolution, building hands-on troubleshooting skills.

Information Security Intern

Helibras

Mar 2022 - Feb 2024 (1 year 11 months)

- Supported internal business continuity audits and protection activities in partnership with the SOC.
- Took part in security awareness initiatives, user support and international projects.
- Cross-checked spreadsheet and document data to validate governance and security processes, policies and controls.