Leone.Bellotti

Leone Bellotti

15+ years building, modernizing and supporting systems — from the database to the interface, from infrastructure to security.

Senior developer with 15+ years of experience across the full system lifecycle: requirements, databases, backend, frontend, infrastructure and security. Builds self-owned digital products from scratch and modernizes critical legacy systems.

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Services

From technical diagnostics to ongoing support: see how I can help your system or product get off the ground, get more secure, or stay standing.

Web systems and API development

Building web systems and REST APIs from scratch, or evolving existing systems, covering database, backend and frontend.

Problem it solves
The business needs a new system, or a feature the current team doesn't have the capacity or time to deliver.
Ideal client
Small and medium businesses, or technical teams that need a senior developer to own a project end to end.
Deliverables
A working system/API, basic technical documentation, version-controlled code, configured deployment.

Engagement model: Fixed-scope project (freelance) or hourly package.

Legacy system modernization and recovery

Updating old systems (ColdFusion, PHP, outdated framework versions) to modern stacks, preserving data and business rules.

Problem it solves
An old system nobody wants to (or can) maintain anymore, but that still keeps the business running — including projects abandoned by other developers.
Ideal client
Companies with critical legacy systems or stalled projects.
Deliverables
Diagnosis of the current codebase, a modernization plan, a migrated system with feature parity.

Engagement model: Consulting plus a fixed-scope project per phase.

Technical diagnostics and vulnerability fixes

Analysis of APIs and systems in production looking for vulnerabilities, outdated dependencies and configuration flaws, with fixes applied.

Problem it solves
A system exposed to security risks the team doesn't know where to find.
Ideal client
Companies with APIs/systems in production without a recent security audit.
Deliverables
A report of vulnerabilities found, fixes applied, hardening recommendations.

Engagement model: One-off consulting or an hourly package.

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Projects

Products I built from scratch, on my own — from idea to launch.

AtendePix

In production

A mini SaaS for small businesses to turn inbound conversations into customers, quotes, Pix charges and financial control.

  • Node.js
  • TypeScript
  • NestJS
  • Prisma
  • PostgreSQL
  • Vue 3
View full case study

3D&T Online

In production

A web companion tool for the 3D&T Alpha tabletop RPG system — character sheets, rulebook catalogs and narrative adventures.

  • Vue 3
  • Vite
  • Tailwind CSS
  • vue-i18n
  • Node.js
  • Express 5
View full case study

Sakkamusuko

Published — ongoing development

Football strategy in your browser: build your club, collect fictional athletes and develop their careers.

  • TypeScript
  • React 19
  • Vite
  • Phaser 4
  • NestJS
  • MongoDB
View full case study
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Experience

15+ years of career growth at a single company, with steadily expanding responsibility and technical scope.

ProcessMind

Since August 2011 (15+ years) — the only company in his professional career.

  1. Internet Systems Analyst
  2. Mid-level Developer
  3. Senior Systems Developer (current)
Experience →

Contact

Have a system to modernize, a product to bring to life, or a consulting role in mind? Let's talk.

Get in touch