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Manila, Philippines · Available for work

Hi, I'm
Jester.

Full-Stack Developer UI/UX Designer Data Analyst Cybersecurity

Results-driven developer and designer with 10+ years of experience delivering full-stack web applications, network solutions, and data-driven insights. Currently expanding into React.js, Node.js, and cloud platforms.

View My Work → Get In Touch
Jester Castro
Jester Castro
Full-Stack Web Developer · UI/UX Designer
Junior Data Analyst · Cybersecurity Analyst
0
Yrs Exp
0
Apps Built
0
Certs
Core Skills
HTML5/CSS3JavaScriptPHPReact.jsFigmaPower BI
📧 jestercher@gmail.com
📞 (+63) 906-516-8640
🔗 github.com/lishan-dev
🌐 lishandev.com
01
About Me

10+ years of building things that work.

View Live Site →

I'm a Manila-based Full-Stack Web Developer and UI/UX Designer with over a decade of hands-on experience across web development, mobile apps, network security, and data analytics. I care about building things that are reliable, fast, and genuinely useful.

My career has taken me from leading IT teams at BenLine Agencies to developing RESTful APIs and implementing AAA security at Converge ICT Solutions. Along the way I've built Android apps, designed with Figma, and crunched data with Power BI and SQL.

Having completed my Diploma in UI/UX Design at De La Salle University, I am currently pursuing studies in Cybersecurity while continuously strengthening my overall technical skills in full-stack development, data analytics, and modern web technologies. I am open to opportunities that align with my skill set, where I can contribute, grow professionally, and create meaningful solutions.

  • Building reliable, well-tested software over quick hacks
  • User needs drive every design and technical decision
  • Clear communication across cross-functional teams
  • Continuous learning — currently: React, Node.js, cloud & cybersecurity
02
Technical Skills

Languages, tools,
and platforms I use.

Languages
HTML5CSS3JavaScript (ES6+)PHPPythonSQLMySQL
Front-End
React.jsBootstrap 5Responsive DesignCross-Browser Compat.
Back-End
Node.jsPHP/MySQLREST API DesignAAA Implementation
UI / UX
FigmaAdobe XDWireframingPrototypingUser ResearchAccessibility
Data & Analytics
Power BIExcel (Advanced)SQLPostgreSQLData Visualization
Cybersecurity
Network SecurityDigital ForensicsThreat DetectionCisco Networking
Tools
Git / GitHubAndroid StudioVS CodeCisco Packet TracerIntelliJXAMPP
Methods
Agile / ScrumCross-Functional Collab.Technical Documentation
Security Tools
NmapWiresharkBurp SuiteMetasploitKali Linux
03
Projects

Things I've built.

01
Personal Portfolio Website

Fully responsive personal portfolio showcasing UI/UX case studies and web development projects. Optimized for performance and mobile-first user experience.

HTML5 CSS3 JavaScript Bootstrap
Live Demo →
02
Real Estate Website

Developed a responsive real estate website that showcases property listings in a clean and organized layout. The project focused on making it easy for users to browse properties, view important details, and reach out with inquiries through an intuitive interface.

PHP MySQL JavaScript HTML5 CSS3
Live Demo →
03
Android Utility Application

Lightweight Android application developed in Java featuring API integration, offline functionality, and an intuitive Material Design interface.

Java Android Studio REST API
GitHub →
04
Insurance Website

Worked on developing a responsive website for FWD Insurance, focusing on clean design, intuitive navigation, and presenting insurance products and services in a way that's easy for users to understand.

HTML5 CSS3 JavaScript Responsive Design UI/UX
Live Demo →
05
Architectural Website

Created a modern architectural website to present the company's services and project portfolio. The website emphasizes clean design, easy navigation, and responsive layouts to help potential clients learn more about the firm's work.

HTML5 CSS3 JavaScript Responsive Design UI/UX
Live Demo →
05
Work Experience

Where I've worked.

2022 – Present
Web Developer
JK2L2 (Powered by Converge ICT Solutions) · Manila, PH
+
  • Designed and maintained RESTful APIs for internal systems, achieving 99%+ uptime through proactive monitoring and performance optimization
  • Implemented AAA (Authentication, Authorization, Accounting) security protocols, reducing unauthorized access incidents by an estimated 40%
  • Automated routine maintenance tasks using scripting, cutting manual intervention time by ~25%
  • Collaborated with cross-functional teams to resolve network bottlenecks, improving average system response time by 30%
REST APIAAA SecurityNetworkScripting
2021 – Present
Android Application Developer
Freelance · Manila, PH
+
  • Developed and deployed several Android mobile applications using Java with Material Design standards
  • Integrated third-party APIs and backend services, reducing feature development time by 20%
  • Conducted code reviews and user acceptance testing (UAT) to ensure stability prior to release
JavaAndroid StudioREST APIMaterial Design
2017 – 2021
Technical Specialist
Teletech · Manila, PH
+
  • Diagnosed and resolved 50+ software/hardware issues per week, maintaining customer satisfaction above 90%
  • Built Excel and Power BI dashboards to track recurring issues, reducing repeat incidents by 30%
  • Documented technical procedures adopted across a team of 15 agents
Power BIExcelTechnical Support
2014 – 2016
Web Specialist & IT Team Lead
BenLine Agencies · Manila, PH
+
  • Led a team of 3 IT staff maintaining and upgrading web-aided enterprise systems, reducing downtime by 20%
  • Managed front-end updates, content management, and cross-browser compatibility for the company website
  • Served as IT liaison between operations and technology teams
Web DevelopmentTeam LeadCMSHTML/CSS
2012 – 2014
Project Coordinator
Portal East, PH
+
  • Developed a C++ command-line application to facilitate and streamline manufacturing workflows for glass production machines.
  • Managed project documentation, reports, and meeting minutes.
  • Facilitated communication between developers, QA engineers, business analysts, and stakeholders.
Project CoordinatorFacilitatorManagementC++
06
Education

Academic background.

2011
Bachelor of Science in Computer Science
Virgen Milagrosa University Foundation (VMUF)
2023–24
Diploma in Data Analytics
University of the Philippines (UP)
2025–26
Diploma in UI/UX Design & Research
De La Salle University (DLSU)
2026
Cybersecurity
Cathedral of Praise Main Campus (COP)
07
Certifications & Training

Credentials.

De La Salle University
UI Design
De La Salle University
UX & Research
University of the Philippines
Data Analytics
VMUF
Cloud Computing
VMUF
Adobe Certified Professional (ACP)
Bayantel Phils
Java App Development
Cisco
Ethical Hacking
Cisco
Networking Basics
I.T. Bootcamp
Junior Cyber Security Analyst
I.T. Bootcamp
Google Cybersecurity Certification
Tryhackme
Jr Penetration Tester
08
Contact

Let's work together.

I'm currently open to junior full-stack and front-end developer roles. If you have a project or opportunity that's a good fit, I'd love to hear from you.

  • Email jestercher@gmail.com
  • Phone (+63) 906-516-8640
  • Location Manila, Philippines
  • Status ● Open to work
🐙 💼 ✉️ 🌐