Hi! I'm

Federico Calò

Software Developer | Technical Writer

I create modern web applications and custom digital tools to help businesses grow through technological innovation. My passion is combining computer science and economics to generate real value.

Contact Me

About Me

My passion for computer science was born at the Technical Commercial Institute of Maglie, where I discovered the power of programming and the fascination of creating digital solutions. From the start, I understood that computer science was not just code, but an extraordinary tool for turning ideas into reality.

During my studies in Business Information Systems, I began to interweave computer science and economics, understanding how technology can be the engine of growth for any business. This vision accompanied me to the University of Bari, where I obtained my degree in Computer Science, deepening my technical skills and passion for software development.

Today I put this experience at the service of businesses, professionals and startups, creating tailor-made digital solutions that automate processes, optimize resources and open new business opportunities. Because true innovation begins when technology meets the real needs of people.

My Skills

Data Analysis & Predictive Models

I transform data into strategic insights with in-depth analysis and predictive models for informed decisions

Process Automation

I create custom tools that automate repetitive operations and free up time for value-added activities

Custom Systems

I develop tailor-made software systems, from platform integrations to customized dashboards

const federico = {
  nome: "Federico Calò",
  ruolo: "Sviluppatore Software",
  città: "Bari, Italia",
  missione: "Aiutare attraverso l'informatica",
  passioni: [
    "Codice Pulito",
    "Innovazione",
    "Crescita Continua"
  ]
};

La Mia Missione

Credo fermamente che l'informatica sia lo strumento più potente per trasformare le idee in realtà e migliorare la vita delle persone.

Democratizzare la Tecnologia

La mia missione è rendere l'informatica accessibile a tutti: dalle piccole imprese locali alle startup innovative, fino ai professionisti che vogliono digitalizzare la propria attività. Ogni realtà merita di sfruttare le potenzialità del digitale.

Unire Informatica ed Economia

Non è solo questione di scrivere codice: è capire come la tecnologia possa generare valore reale. Intrecciando competenze informatiche e visione economica, aiuto le attività a crescere, ottimizzare processi e raggiungere nuovi traguardi di efficienza e redditività.

Creare Soluzioni su Misura

Ogni attività è unica, e così devono esserlo le soluzioni. Sviluppo strumenti personalizzati che rispondono alle esigenze specifiche di ciascun cliente, automatizzando processi ripetitivi e liberando tempo per ciò che conta davvero: far crescere il business.

Trasforma la Tua Attività con la Tecnologia

Che tu gestisca un negozio, uno studio professionale o un'azienda, posso aiutarti a sfruttare le potenzialità dell'informatica per lavorare meglio, più velocemente e in modo più intelligente.

Parliamone Insieme →

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Discussion Topics

View

Master SQL

RoadMap.sh

November 2024

View

Oracle Certified Foundations Associate

Oracle

October 2024

View

People Leadership Credential

Connect

September 2024

💻 Languages & Technologies

Java

Python

JavaScript

Angular

React

TypeScript

SQL

PHP

CSS/SCSS

Node.js

Docker

Git

💼

12/2024 - Present

Custom Software Engineering Analyst

Accenture

Bari, Puglia, Italy · Hybrid Analysis and development of computer systems through the use of Java and Quarkus in Health and Public Sector. Continuous training on modern technologies for creating customized and efficient software solutions and on agents.

💼

06/2022 - 12/2024

Software analyst and Back End Developer Associate Consultant

Links Management and Technology SpA

Experience analyzing as-is software systems and ETL flows using PowerCenter. Completed Spring Boot training for developing modern and scalable backend applications. Backend developer specialized in Spring Boot, with experience in database design, analysis, development and testing of assigned tasks.

💼

02/2021 - 10/2021

Software programmer

Adesso.it (prima era WebScience srl)

Experience in AS-IS and TO-BE analysis, SEO evolutions and website evolutions to improve user performance and engagement.

🎓

2018 - 2025

Degree in Computer Science

University of Bari Aldo Moro

Bachelor's degree in Computer Science, focusing on software engineering, algorithms, and modern development practices.

📚

2013 - 2018

Diploma - Corporate Information Systems

Technical Commercial Institute of Maglie

Technical diploma specializing in Business Information Systems, combining IT knowledge with business management.

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Project Evolution: Scalability and Maintenance

A project doesn't end with deployment. The real challenge is maintaining, evolving, and scaling it over time. Claude can be a valuable partner for refactoring, adding features, and scalability decisions.

In this article, we'll see how to use Claude for continuous maintenance, guided refactoring, and planning project evolution.

What You'll Learn

Refactoring strategies with Claude
Adding new features safely
Technical debt management
Scalability: when and how
Preventive maintenance

Guided Refactoring with Claude

Claude excels at refactoring because it can analyze the complete context and suggest improvements while maintaining compatibility.

Prompt for Refactoring

<role>You are a Senior Developer specialized in refactoring</role>

<context>
I have this OrderService that has grown too large.
It has 500+ lines and handles: CRUD, validation, notifications, payments.
</context>

<code>
[Paste the service code]
</code>

<task>
Analyze the service and propose a refactoring plan:
1. Identify Single Responsibility violations
2. Propose separation into smaller services
3. Suggest refactoring order (minimum risk)
4. Provide code examples for critical parts
</task>

<constraints>
- Maintain external API compatibility
- Incremental refactoring (no big bang)
- Each step must be deployable
</constraints>

Common Refactoring Patterns

      Refactoring Patterns
      
        PatternWhen to UseBenefit

          Extract Service
          Service too large
          Single Responsibility
        
          Replace Conditional with Polymorphism
          Complex switch/if
          Extensibility
        
          Introduce Parameter Object
          Too many parameters
          Readability, maintainability
        
          Extract Domain Events
          Scattered side effects
          Decoupling, testability

Adding New Features

Feature Toggle Pattern

Feature Toggle for Gradual Rollout

// FeatureToggleService.java
@Service
public class FeatureToggleService {{ '{' }}

    @Value("#123;{ '{' }}features.recurring-orders.enabled:false{{ '}' }}")
    private boolean recurringOrdersEnabled;

    @Value("#123;{ '{' }}features.recurring-orders.rollout-percentage:0{{ '}' }}")
    private int rolloutPercentage;

    public boolean isRecurringOrdersEnabled(String customerId) {{ '{' }}
        if (!recurringOrdersEnabled) return false;

        // Gradual rollout based on customer ID hash
        int hash = Math.abs(customerId.hashCode() % 100);
        return hash < rolloutPercentage;
    {{ '}' }}
{{ '}' }}

Technical Debt Management

Tech Debt Backlog Template

# Tech Debt Backlog

## Critical
| Issue | Effort | Impact | Sprint |
|-------|--------|--------|--------|
| Spring Boot 3.0 → 3.2 (CVE) | 4h | Security | Next |
| N+1 query in OrderList | 2h | Performance | Next |

## High
| Issue | Effort | Impact | Sprint |
|-------|--------|--------|--------|
| OrderService split | 8h | Maintainability | Q2 |
| Add integration tests | 16h | Reliability | Q2 |

## Medium
| Issue | Effort | Impact | Sprint |
|-------|--------|--------|--------|
| Refactor DTOs to records | 4h | Code quality | Backlog |

Scalability

When to Scale

      Scalability Indicators
      
        MetricThresholdAction

          Response Time P95
          > 500ms
          Optimize queries, add cache
        
          CPU Usage
          > 70% sustained
          Horizontal scaling
        
          Memory Usage
          > 80%
          Analyze memory leaks, scale up
        
          Error Rate
          > 1%
          Debug, circuit breaker

Preventive Maintenance

Monthly Maintenance Checklist

# Monthly Maintenance Checklist

## Dependencies
- [ ] Check vulnerabilities
- [ ] Update minor versions
- [ ] Review breaking changes

## Database
- [ ] Analyze slow queries
- [ ] Check table sizes
- [ ] Test backup restore

## Monitoring
- [ ] Review triggered alerts
- [ ] Analyze metric trends
- [ ] Check error logs

## Security
- [ ] Rotate secrets/keys
- [ ] Review access logs
- [ ] Check certificate expiry

Recap and Next Step

We've come a long way in the "Claude: AI-Driven Personal Project" series. In these articles, we've explored how to use Claude as a technical partner for every development phase:

      Series Recap
      Foundation: Claude principles and prompt engineering
Context: Project setup and instruction files
Ideation: MVP, requirements, user personas
Architecture: Spring Boot backend, Angular frontend
Code Structure: Organization and conventions
Prompt Engineering: Advanced techniques
Testing: Strategies and test generation
Documentation: README, API, ADR
Deploy: Docker, CI/CD, monitoring
Evolution: Refactoring, scalability, maintenance
Real Integration: Claude Code in a production project

    

Key Takeaways

Claude is an amplifier: Your skills determine the results
Context is everything: More information yields better responses
Always iterate: The first response is a starting point
Always verify: Claude is powerful but not infallible
Document decisions: Future you will thank you

In the next article, we'll see how to apply all of this in a real project: integrating Claude Code into Play The Event, a multi-stack project with DDD and Hexagonal architecture.

Pattern	When to Use	Benefit
Extract Service	Service too large	Single Responsibility
Replace Conditional with Polymorphism	Complex switch/if	Extensibility
Introduce Parameter Object	Too many parameters	Readability, maintainability
Extract Domain Events	Scattered side effects	Decoupling, testability

Metric	Threshold	Action
Response Time P95	> 500ms	Optimize queries, add cache
CPU Usage	> 70% sustained	Horizontal scaling
Memory Usage	> 80%	Analyze memory leaks, scale up
Error Rate	> 1%	Debug, circuit breaker