Available for freelance

// hello, world — I build & break things

Daniel Jesus Full Stack Developer, SysAdmin, DevOps, Cyber Security Engineer, Pen Tester, Ethical Hacker, Security Researcher

Full Stack Developer, SysAdmin and Ethical Hacker with 22 years of experience. I build fast, secure online stores and systems — and I attack them before anyone else does.

$ whoami

danieljesus

$ cat roles.txt

Full Stack Developer · SysAdmin · DevOps

$ uptime

22 years of experience

$ ./hire --now

  • php
  • prestashop
  • linux
  • docker
  • pentest
  • nginx
scroll

// 01 — about

Passionate about technology since forever.

I have always been passionate about technology. For years I produced electronic music, built websites and grew professionally. I evolved! I raised the bar in software development. I went from programmer to webmaster, learned new technologies, mastered several. Today I am a Full Stack Developer.

I had the chance to be part of some of the best projects in the world. I built systems, improved online stores and contributed to a faster, easier-to-navigate web.

Over time I ran complete web systems. I built networks, cloud systems and solved problems. I integrated SIEM systems, specialised in security and took a Master's in Cyber Security. I became a Pen Tester, Ethical Hacker, Reverse Engineer and Security Researcher.

Today I build and protect systems — but above all, I help my clients grow.

// 02 — services

What I do

  • E-commerce

    I build online stores — my main focus. E-commerce is where I feel at home. Building systems around performance and usability is my thing.

  • Web Design

    As a Full Stack Developer I bring knowledge from every layer into the design and usability of websites. I am meticulous when it comes to development.

  • Performance Optimization

    Performance is one of the factors with the biggest impact on SEO and UX. I optimise your project, both in code and in system requirements.

  • SysAdmin

    I manage and maintain servers and databases. I update and configure servers, cloud systems and AWS. I design networks, load balancers and multi-server solutions.

  • CyberSec

    I am a Pen Tester, Ethical Hacker and Security Researcher with a Master's in Cyber Security. I apply secure development practices to every project.

  • SDLC

    SDLC, the Software Development Life Cycle, is the life cycle of a project. It must be well defined and structured — especially when it comes to security.

// 03 — journey

22 years building, running and securing systems.

Download CV

Experience

  1. 2015 - Present

    Full Stack Developer @ Brazilian Bikini Shop

    I became Full Stack Developer at Brazilian Bikini Shop. All the code, backend and frontend, is my responsibility. I integrate the system with commercial partners, build client APIs and connect external systems. I handle databases, performance, domains and backups, and build micro-services and background jobs.

  2. 2014 - Present

    Full Stack Developer @ Loja de Biquini

    I build the whole system and the integrations the business depends on. 99% custom code to streamline the daily work of the management and sales teams.

  3. 2014 - 2015

    Webmaster @ Brazilian Bikini Shop

    I joined as webmaster the company where I would develop and refine my work and knowledge. The variety of services, techniques and internationalisation gave me skills in external integrations, APIs, programming languages and geolocation.

  4. 2009 - 2014

    Webmaster / PHP Developer @ 4 PERFECT BODY

    At 4 PERFECT BODY I built a large part of the knowledge I have today: e-commerce on InterSpire Shopping Cart, PrestaShop, OpenCart and Magento, and the first Multibanco payment modules with live notification using IfthenPay. I helped the PrestaShop team improve the open-source platform since version 0.9 and supported more than 100 projects.

  5. 2006 - 2010

    Night Club DJ @ TUSP

    With TUSP (The Underground Soul Project) I played in some of the best clubs in Portugal.

  6. 2005 - 2011

    Music Producer

    I released tracks on labels such as Aveiro Underground, Tanira Rec., Beat & Soul Music Group and FireBeat Rec., working with Ableton Live, Reason and Cubase, mixing and mastering.

  7. 2004 - 2008

    Webmaster / Print Designer @ HAW Agency

    Built and maintained the website of an artist booking agency and designed flyers and press prints with Photoshop, Fireworks, Corel Draw and Adobe Flash.

Education

  1. 2016 - 2018

    Master's in Cyber Security

    Universidad Camilo José Cela + Deloitte CyberSOC

    Master's in Cyber Security in partnership with the Deloitte CyberSOC Academy: Ethical Hacking, Pen Testing, Reverse Engineering, Forensics, SIEM, Mobile Security and Secure Development. My final thesis received an honourable mention as a stand-out work in physical intrusion.

  2. 2017-02 - 2017-08

    Ethical Hacker and Penetration Tester

    Social27

    view certificate

  3. 2017-02 - 2017-04

    Certified Security Analyst

    Social27

    view certificate

  4. 2017-02

    Kali 101

    Social27

    view certificate

  5. 2016-11 - 2017-02

    Certified Application Code Defender

    Social27

    view certificate

  6. 2016

    Recognition of Prior Learning

    Universidad Camilo José Cela

    Skills validation and aptitude exams granting equivalence to a Bachelor's degree in Computer Engineering.

  7. 2002 - 2003

    Multimedia & Web Design

    CIDEC

    Multimedia and Web Design course, completed in 2003 with a final grade of 18/20.

  8. 1999 - 2002

    Secondary School

    Escola Secundária Marques de Castilho

    Finished secondary school in 2002 in the Technology track.

// 04 — skills

Stack & skills

01. Skills

  • Full Stack Developer 100%
  • SysAdmin 90%
  • Pen Testing 85%
  • Ethical Hacking 90%
  • ITIL, Cobit, SDC 90%
  • Performance Optimizer 100%
  • Code Debugger 88%
  • Integração API 80%
  • Bug Tracker 90%

02. Programming

  • JavaScript 85%
  • PHP 90%
  • Python 70%
  • HTML / CSS 100%
  • Smarty / Twig 80%
  • C / C++ 55%

03. Frameworks / Open Source

  • PrestaShop 95%
  • Symfony Framework 86%
  • Wordpress 92%
  • OpenCart 82%
  • Interspire Shopping Cart [Big Commerce] 98%
  • Magento 68%

04. SysAdmin

  • Apache 90%
  • nGinx 75%
  • MySQL 80%
  • Kubernetes 60%
  • Docker 70%
  • PHP-FPM 90%

05. Operating Systems

  • Win. Server 55%
  • Centos 5, 6, 7 90%
  • Debian 80%

// 06 — clients

Clients who trusted me

For years I worked to answer the most diverse questions from clients. Along the way I learned many techniques that helped businesses grow and others get started.

The best client in the world is the one who prepares early for the journey we take together... That's why mine are the best!

— Daniel Jesus

// 07 — blog

Opinion, notes & research

all articles

// 08 — contact

Let's build something solid.

Online store, server infrastructure, a security audit or a performance boost? Tell me about your project — I reply within 24 hours.

Available for freelance

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