Case studies, systems notes, and role fit organized as one editorial surface.
Resume
Savio Filho
Software engineer for backend product systems, SaaS operations, and applied AI.
My best fit is in products that need clear backend structure, predictable operations, reliable contracts, and documentation that stays useful after the first release.
I am most useful in systems that do not live only on the happy path: billing, auth, queues, uploads, tenant boundaries, approval trails, and AI features that need cost limits and human-readable guardrails. I care about the repository surface, handoff quality, and the boring details that let another engineer or operator understand the product quickly.
Best fit
Where I tend to create the most leverage
The kinds of products and teams where my profile usually compounds well.
APIs, service layers, approval flows, and repository surfaces that still make sense after the initial push.
Billing, auth, queue-backed jobs, tenant isolation, and the operational detail that keeps a smaller product credible.
AI features with cost limits, predictable fallbacks, auditable steps, and decisions that do not take the product away from operators.
Capabilities
What I can usually take ownership of
The scope that tends to make sense when a team needs execution with system thinking attached.
API design, authentication flows, webhooks, billing integrations, and service-to-service boundaries with clear failure modes.
Queues, background tasks, upload pipelines, release checklists, runbooks, and the inspection points that keep systems predictable.
Architecture notes, READMEs, deployment guides, case studies, and repository organization that helps another engineer get to useful context faster.
Stack
Tools and layers I work with most comfortably
The emphasis here is not tool volume. It is familiarity with what tends to show up in product systems that need to survive real usage.
Languages and runtimes
- TypeScript
- Node.js
- Next.js
- Express and Fastify
- Python
- React Native
Data and infrastructure
- PostgreSQL
- Prisma and Drizzle ORM
- Supabase
- Redis and BullMQ
- Object storage
- Docker Compose
Quality and delivery
- GitHub Actions
- Vitest and Jest
- pytest
- OpenAPI
- Technical documentation
- Repository standards
Start with these cases
Three reads that explain my work better than a bullet list
If I were introducing my work to a serious founder, recruiter, or tech lead, I would start with these paths first.
OnboardPulse
A multi-tenant onboarding SaaS with billing, follow-up automation, storage controls, and product-like operational docs.
This project shows that I can work beyond CRUD: tenant isolation, budgeted AI usage, billing webhooks, storage policy, and cron-driven follow-ups.
MailSieve
A lightweight signup risk API with OpenAPI contract, key management workflow, rate limits, and deploy verification scripts.
MailSieve is a good example of a small API product where contract clarity, ops scripts, and monetization readiness matter more than feature count.
VOWGRID
A private case study for an agent-trust platform with simulation, policy evaluation, approvals, execution receipts, and rollback visibility.
The core signal is not just AI orchestration. It is the trust layer around execution: propose, simulate, evaluate, approve, execute, receipt, and rollback visibility.
Direct close
If the role needs backend product work with operational clarity, this is probably worth a conversation.
The clearest picture of my work lives in the combination of GitHub, case studies, and technical writing. The resume helps, but the proof gets stronger when those three surfaces are read together.
- Products with billing, auth, queues, uploads, or automation that need to stay legible after launch.
- Teams that value documentation, explicit trade-offs, and ownership beyond the happy path.
- Remote or hybrid environments where written clarity and technical handoff matter.
Direct paths
Email, GitHub, and LinkedIn stay as the fastest way to reach me and inspect more context.