01Enterprise
Centralized HRIS with Biometric Integration
A real-time HR information system for multiple offices, combining biometric attendance logging, data synchronization, and centralized employee records.
Full-stack systems · cloud · devops
Available for freelance projects
Jonathan
Costillas
Building reliable web applications and enterprise information systems.
An IT professional with six years of hands-on experience designing, developing, and supporting ICT solutions for government agencies and enterprise organizations.
01
const portfolio = {02
runtime: "static",03
source: "GitHub",04
build: "Next.js export",05
delivery: "GitHub Pages",06
focus: [07"enterprise systems",
08"cloud architecture",
09"reliable delivery"
10 ]
11};
06years
experience
experience
14project
engagements
engagements
03professional
roles
roles
working stack
Next.jsTypeScriptReactVue.jsLaravelDockerWHM / cPanelTerraformAWSRDSCodePipelineCodeBuildDynamoDBGitHub ActionsReact NativeFlutter
Selected systems
A portfolio of working information systems.
Fourteen documented project engagements across government and enterprise workflows — from HR and recruitment to learning, records, and requests.
02Enterprise
Document Tracking System
A department-wide workflow for streamlining, monitoring, and tracking document movement and approvals.
03Web
Job Portal
A responsive recruitment platform with job posting, applicant tracking, and workflow features.
04Enterprise
Youth Organization Registration Program
A web-based system for youth organization registration, accreditation, and document compliance.
05Enterprise
Voting System
A secure, real-time digital voting platform for organizational and local elections.
06Enterprise
Monitoring System
A system for tracking program activities, performance indicators, and operational progress.
Engineering lens
Build the system. Understand the path. Ship the work.
The portfolio separates the systems I build from the cloud and delivery patterns I study — so the architecture stays honest.
Portfolio runtime
Simple by design.
GitHub stores the source. GitHub Actions builds a Next.js static export. GitHub Pages serves the result. No backend, database, API server, or AWS infrastructure is required.
Trace the delivery path01Source-controlled
workflow
workflow
02Cloud and
container knowledge
container knowledge
03Static site
delivery
delivery
Full-stack + cloud literacy
The interface is only one layer.
Explore the skills, frameworks, mobile platforms, data tools, and delivery concepts behind the work.
Next.jsTypeScriptLaravelDockerAWSReact NativeFlutter
Open channel
Let's talk systems.
For collaboration, technical conversations, or a closer look at the work, use the contact page or connect through LinkedIn.
Start a conversation