# Sonia Costa · Software Developer & Engineer

> I build full-stack web and mobile products end to end — clean, maintainable, and ready for production.

- Location: Dublin, Ireland
- Remote / Hybrid / On-site
- Permanent or freelance
- Portuguese (native) · English (fluent)
- Public page: https://profile.iampro.io/sonia-andreia
- Contact: through the form on the public page (the address stays private)

## About

Full-stack developer with 7+ years of experience across PHP, JavaScript, React, and Python, delivering scalable web applications and mobile solutions. Known for bridging frontend polish with solid backend architecture, integrating AI tooling into workflows, and mentoring junior developers. Based in Dublin, currently working at VigiTrust while pursuing a Computer Engineering degree.


## Achievements (5)

### 1. Reduced user management time by 50% by architecting a full-stack document management system compliant with ISO 27001:2022

- VigiTrust Limited
- Stack: PHP, MySQL, JavaScript
- Verification: self-reported, no public source

**Problem.** The team needed a document management system that met ISO 27001:2022 compliance requirements and reduced the overhead of user management tasks.

**Result.** Reduced user management time by 50% while ensuring ISO 27001:2022 compliance.

**What I did.** Developed and architected a full-stack PHP/MySQL/JavaScript solution for the document management system end to end.

### 2. Increased development velocity by 35% by applying AI coding tools including GitHub Copilot and Codex

- One Sky Collective
- Stack: GitHub Copilot, Codex
- Verification: self-reported, no public source

**Problem.** An early-stage startup needed to move quickly with a small team.

**Result.** Increased development velocity by 35%.

**What I did.** Applied AI coding tools including GitHub Copilot and Codex for development, debugging, refactoring and solution design.

### 3. Achieved 95%+ average across ICDL certifications in Cyber Security, AI and Coding Principles

- Self-directed · 2024 - 2025
- Scale: 3 certifications
- Verification: self-reported, no public source

**Problem.** Sought to formalise and validate newly acquired skills during a career transition period.

**Result.** Achieved 95%+ average score across all certifications.

**What I did.** Completed ICDL certifications in Cyber Security, AI and Coding Principles.

### 4. Decreased code integration conflicts by 20% within 2 months by centralising version control across 6+ GitHub repositories

- VigiTrust Limited
- Scale: 6+ repositories
- Stack: Git, GitHub
- Verification: self-reported, no public source

**Problem.** The development team lacked centralised version control, leading to frequent code integration conflicts.

**Result.** Decreased code integration conflicts by 20% within 2 months.

**What I did.** Configured and administered 6+ GitHub repositories, introducing modern Git development workflows.

### 5. Reduced manual setup tasks and errors by 85% by leading an e-learning platform integration with the company's e-commerce site

- VigiTrust Limited
- Stack: PHP, WordPress, WooCommerce
- Verification: self-reported, no public source

**Problem.** Sales and customer success teams were burdened by manual setup tasks and errors when onboarding customers.

**Result.** Reduced manual setup tasks and errors by 85% for sales and customer success teams.

**What I did.** Led the e-learning platform solution and integrated it with the company's e-commerce site.


## Technical Expertise

Proven in the work: PHP (2), GitHub (2), GitHub Copilot (2), MySQL (1), JavaScript (1), Git (1), WordPress (1), WooCommerce (1), Codex (1)

Proven by experience: Agile / Scrum (6 yrs), HTML5 (4 yrs), CSS3 (4 yrs), Laravel (4 yrs), REST APIs (2 yrs), TypeScript (2 yrs), React (2 yrs), React Native (2 yrs), Python (1 yrs), Data Analytics (1 yrs), Claude Code (<1 yrs), Figma (<1 yrs), Tailwind CSS (<1 yrs)

Also worked with: jQuery, AJAX, JSON, PostgreSQL, Code review, Debugging, Testing, Django, Django REST Framework, SQL Server, Web Security Principles


## Timeline

- **2026–now** · Software Developer · VigiTrust Limited
  - Reduced user management time by 50% by architecting a full-stack document management system compliant with ISO 27001:2022
  - Designed a multi-region data synchronisation architecture consolidating tracking data across 4 regions
  - Integrated Claude Code into development workflows to support AI-assisted development, testing and code reviews

- **2026** · React Native Developer | Frontend & Mobile | Part-time · One Sky Collective
  - Increased development velocity by 35% by applying AI coding tools including GitHub Copilot and Codex
  - Built reusable, responsive cross-platform mobile UI components from Figma designs using React Native and TypeScript

- **2024–2025** · Career Break — Technical Upskilling and Career Transition · Self-directed
  - Achieved 95%+ average across ICDL certifications in Cyber Security, AI and Coding Principles
  - Advised 3 non-profit organisations on UX/UI, AI tools and CMS platforms, leading to revamped digital effectiveness
  - Completed 500+ hours of hands-on practice across Python, TypeScript, React, Data Analytics, BI, Cloud Computing and Scrum

- **2020–2024** · Application Developer · VigiTrust Limited
  - Decreased code integration conflicts by 20% within 2 months by centralising version control across 6+ GitHub repositories
  - Reduced manual setup tasks and errors by 85% by leading an e-learning platform integration with the company's e-commerce site
  - Mentored 2 junior developers through Agile sprints, conducting code reviews across 5,000+ lines of code

- **2018–2019** · PHP Developer · Aubay Portugal
  - Delivered 5+ features within the first 2 months using PHP/CodeIgniter with OOP/MVC
  - Contributed to a 50% increase in user satisfaction by implementing real-time data dashboards and notification systems

- **2017–2018** · System Analyst · Optigest | Optisolution - Consultoria em Gestão e Informática, Lda
  - Contributed to a 35% increase in client revenue within the first year by integrating REST APIs for payment, Google Maps and booking services
  - Achieved 90% client retention by partnering with clients on requirements analysis and delivering customised software solutions


## Degrees · Certifications

- Bachelor of Engineering — Civil Engineering · Universidade do Minho
- Specialization (Post-Graduation) — IT & Computer Programming ("Qualifica IT") · Universidade do Minho
- IT Specialist in Artificial Intelligence; AWS AI Practitioner (in progress) · Cenit College & eCollege
- Bachelor of Engineering — Computer Engineering · Universidade Aberta

- Data Analytics · ICDL · 2026
- Coding Principles · ICDL · 2025
- Artificial Intelligence · ICDL · 2025
- Cyber Security · ICDL · 2025