Javier D.

Javier D.

Amsterdam, Netherlands
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About Me

Javier is a Senior Back-end Developer & Technical Lead with 10+ years of industry experience integrating solutions into new and existing codebases, maintaining high standards for consistency, quality, and code design. He develops, maintains, and supports multiple software systems using PHP, Ruby, JavaScript, SQL, Laravel, Ruby on Rails, Angular, and Vue.js. Javier ensures code quality and reliability following established development standards and using a variety of methods, tools, and environments.

Frontend

Backend

Database

Other

Work history

UpStack
UpStack
Senior PHP Developer
2020 - Present (5 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participating in scrums consisting of cross-functional teams, both software and hardware.

  • Ensuring that features are being delivered efficiently and on time.

fonQ
fonQ
Technical Lead | Senior Software Engineer
2024 - Present (1 year)
Utrecht (Hybrid), Netherlands

Leading technical teams for a Dutch retail company.

PHPTechnical Leadership
Emesa Holdings BV
Emesa Holdings BV
Technical Lead | Back-end Developer
2021 - 2024 (3 years)
Amsterdam, Netherlands

Worked for a Dutch eCommerce portal specializing in the online leisure market, particularly in the Netherlands, offering deals on leisure activities and travel.

PHPRubyJavaScriptMySQLLaravel Back-end Development Technical Leadership eCommerce
Immense Group
Immense Group
Back-end Developer
2020 - 2021 (1 year)
Remote
  • Participated in and led the strategic development of methods, techniques, and evaluation criteria for projects.

  • Brainstormed with product managers, designers, and front-end engineering to conceptualize, build, and implement new features on client projects.

  • Improved engineering standards, tooling, and game development processes.

The Ear Platform
The Ear Platform
Senior PHP Developer
2020 - 2020
Remote
  • Developed new product lines and features for the platform and applications, improving and maintaining the quality of the entire codebase.

  • Ensured that code follows best practices and final products match project requirements.

  • Responded to continuous development and support tasks for existing clients.

VENTURE.co
VENTURE.co
Software Developer
2017 - 2020 (3 years)
Remote
  • Built and maintained features for VENTURE.co's cloud-based technologies, troubleshooting and finding creative solutions to complex problems.

  • Wrote production-level code with minimal revisions from peer reviews, maintaining security, performance, and code quality standards.

  • Served as a subject-matter expert on back-end development.

Freelance
Freelance
Senior PHP Developer
2014 - 2020 (6 years)
Remote
  • Designed, developed, and maintained web solutions and features for a private investment system for a company based in the US construction market.

  • Developed and maintained a non-profit platform for STEAM resources for children and teenagers in the US, adhering to standard coding best practices.

  • Developed a web portal for STEAM resources of children and teenagers in Australia, improving performance, scalability, reliability, and security.

Mkit Digital
Mkit Digital
Senior Engineer | Director, Latin America
2014 - 2017 (3 years)
Medellin, Colombia
  • Designed, built, and maintained custom production-grade digital solutions and systems for clients in different industries.

  • Set the direction for projects within Latin America, working effectively with engineers across teams to create cohesive, high-quality products for clients.

  • Coached and mentored a team of diverse and talented software engineers on projects.

Talos Digital
Talos Digital
Senior PHP Developer
2014 - 2015 (1 year)
Medellin, Colombia
  • Built and maintained scalable and reliable enterprise SaaS applications in PHP for companies in the client retention industry.

  • Contributed to the culture of continuous improvement on projects for clients, participating in project scoping, resource planning, and timeline estimation.

  • Troubleshot and maintained software solutions and databases to ensure strong optimization and functionality.

Universistaria de Investigacion y Desarrollo (UDI)
Universistaria de Investigacion y Desarrollo (UDI)
Computer Science Lecturer
2012 - 2014 (2 years)
Bucaramanga, Colombia
  • Delivered lessons in programming languages for beginners.

  • Actively participated in R&D computer science projects.

  • Wrote and published research papers.

Soluciones Perceptivas
Soluciones Perceptivas
Software Developer
2010 - 2011 (1 year)
Bucaramanga, Colombia
  • Designed, developed, and maintained an accounting system for Soluciones Perceptivas.

  • Supported and maintained the accounting system, troubleshooting issues and recommending improvements.

  • Provided clear and consistent communication around solutions and estimates to the client-facing project team.

Showcase

Lead Back-end Developer - The STAR Portal
Lead Back-end Developer - The STAR Portal
  • The STARportal is Australia's first centralized national portal for STEM activities.

  • It provides a searchable database of local and online STEM activities.

  • The backend team led the project, including design, implementation, bug fixing, and maintenance.

Senior PHP Developer - Sky Live
Senior PHP Developer - Sky Live
  • Sky Live offers online gaming entertainment across sports betting, online and live casino in emerging and regulated markets.

  • The platform utilizes Laravel and microservices architecture for innovative and interactive gaming experiences.

  • Sky Live focuses on secure environments for gaming development.

Lead Back-end Developer - Science of Festivals
Lead Back-end Developer - Science of Festivals
  • Science of Festivals is a collaborative network focused on serving science and technology communities.

  • The backend team was led by the project and utilized WordPress.

  • The project involved delivering a solution using WordPress.

Education

Master's Degree, Software Engineering
Master's Degree, Software Engineering
Universidad Industrial de Santander, Bucaramanga - Colombia
2010 - 2013 (3 years)
System Engineering
System Engineering
Universidad Industrial de Santander, Bucaramanga - Colombia
2003 - 2010 (7 years)