I'm a backend developer building ZeroChiamate, a CRM SaaS for service businesses.

Although I prefer working with Java and SQL, I'm also proficient in Python, TypeScript and PHP.

Ambiguity and high-ownership is how I function best.

A CRM reusable core. A CRM isn't one feature — it's fifty features that need to compose. I designed ZeroChiamate's architecture so each new domain (billing, scheduling, geocoding, file storage, AI) slots in without touching what already works. The backend follows a strict package-by-feature layout with layered responsibilities: domain logic never leaks into infrastructure, integrations are swappable behind interfaces, and external services are isolated so the core doesn't know — or care — whether you're using Stripe, Resend, or Geoapify. I designed the email layer so it doesn't know either. The backend doesn't know where /dashboard lives on the frontend — so I made it not care. On the frontend, calling APIs directly from components works until it doesn't — I built an abstraction layer. Built solo, from scratch.

Appointments. I wrote the internal agenda system in raw PHP and SQL — no frameworks — for a company with 120+ employees. It replaced Google Calendar + Excel. To quote them: "it was a mess." What makes me proud isn't the adoption — it's the dependency. Any incorrect logic would immediately affect the whole company and cause serious trouble with clients. That has never happened. I enjoy these responsibilities. It's where I give my best. Since then I've been fascinated with time-related algorithms, which years later led me to formalize aspects of this problem into a spec.

Stats for CEO. Responsible for the numbers a CEO looks at first thing in the morning to assess how the company is going and what decisions to take. I worked directly with sales, invoices, earnings, salaries, employee commissions — grouped by month, week, region, and custom metrics. My day was translating requirements like "cross-reference the N invoice confirmations for each customer in the given month, only if the confirmation type was X, only if the customer met condition Y" into logically robust SQL. Months went by. No complaints about reliability, despite data scrutinized daily by the CEO. We can interpret that as it just works.

Background jobs. I was fed up having to learn a new framework for background jobs, so I made my own.

Forgot password. I have a natural skepticism towards abstractions — either I build my own, or I'll go deep into the bowels of the one I'm using. I designed a forgot password security system where the code reads like plain English. See for yourself.

Algorithms. Original solutions to classical problems. Matrix traversal looks complex. Zigzag in 3 lines. Find the exit of a maze where each cell's value must be strictly increasing, with N candidate cells at each step? Still 3 lines. Same Matrix Traversal Engine. Verifying a palindrome linked list with one recursive function, no pre-computations, no extra passes — recursion gives you the future for free, if you know how to freeze the present. Finding all nodes at distance K from a target in a binary tree: the trick isn't going down. How I traversed unique nodes exactly once.

Access control. I designed an access control system letting admins control every page of the CRM from a single central panel — enable or disable access to pages or portions of pages, per role, with one click. The ease of use reflects how much I care about UX.

Personality. What does it tell you about an individual that teaches themselves German from scratch — 1 hour a day, every day for 8 months, self-designed plan, 0 to fluent? I like doing the harder things. (I speak 6 languages.)

ZeroChiamate CRM — built solo, from scratch.

Java + Spring Boot backend, React + TypeScript frontend, PostgreSQL, deployed on Cloudflare Pages and Railway.

Some things I built that I'm proud of:

• AI-powered contract discrepancy detection using Anthropic's API
• Stripe billing — subscriptions, trials, webhooks, full lifecycle
• Schema migrations across 3 environments with Flyway

Backend developer at Italia Lavoro — built the invoicing and agenda systems. My SQL financial analysis algorithms are used by the company's administration for sales, salaries, employee performance and regional expansion analysis.

Java · Spring Boot · PostgreSQL React · TypeScript · JavaScript · Bootstrap · HTML · CSS Python · PHP

Italian (native) · English (fluent) · German (fluent) Spanish · French · Romanian

• GitHub: github.com/tave8
• ZeroChiamate: https://zerochiamate.com