Hi! 👋
Web developer building full-stack applications for real-world use, focused on reliable systems, clean architecture, and practical solutions.
Featured Projects.
( _03 )
Selected projects focused on end-to-end systems, real-world constraints, and production readiness.
Soluusi — Online Consultation Platform
Soluusi is an online consultation platform built to connect users with 300+ verified professional consultants in Indonesia.
Shinjuku Hair Make
A landing page web for a hair salon and make-up in Surabaya, Indonesia.
Duta Sarana Computer - E-Commerce Website
An e-commerce website for a multi-city computer and printer retail platform.
Jericho
Alfa D.
I'm Jericho Alfa, a web developer working on full-stack applications. I build web systems that connect clean interfaces with reliable APIs, databases, and production-ready deployments.
I focus on end-to-end ownership — from understanding business needs and system flows to development, testing, deployment, and ongoing improvements.
Web Development Systems
Web applications that reflect real system state, backed by scalable APIs, reliable databases, and production-ready deployments.
Full-Stack Web Engineering
End-to-end development covering UI, REST APIs, backend logic, and cloud-ready infrastructure for real-world use.
Business-Driven
Systems shaped by real business workflows, supported by process analysis, UAT, and practical reporting.
Experience.
( _02 )Full Stack Web Developer
Hartono
DEC 2024 - PRESENT
- →Developed and maintained backend services for enterprise applications using Django and PostgreSQL, ensuring performance optimization and data integrity.
- →Designed system architecture including ERD, DFD, and RESTful APIs, enabling seamless integration across management, business, delivery, and audit systems.
- →Implemented containerized environments with Docker and integrated AWS S3 for scalable file storage and database operations.
IT Project & Support (Contracted)
PT HM Sampoerna
AUG 2024 - NOV 2024
- →Troubleshot application and business-process issues within the MyHero system, ensuring seamless functionality and minimal disruption to sales activities.
- →Analyzed end-to-end data flows on AWS, evaluated multi-channel data input and output processes, and identified bottlenecks to improve data accuracy, integrity, reporting quality, and overall system performance.
- →Delivered technical support and continuous improvements through cross-team collaboration, aligning system behavior with operational and business needs.
Fullstack Web Developer & IT Support
Duta Sarana Computer
JUN 2023 - SEP 2024
- →Designed and developed full-stack web solutions using Laravel, handling backend logic, database management, and responsive UI implementation.
- →Delivered end-to-end technical solutions through system optimization, troubleshooting, asset management, and continuous technology improvement.
- →Managed enterprise network and server infrastructure, including Mikrotik VPN setup, routing configuration, Windows Server maintenance, and end-user email configuration.
Business Operation Support - Managed Service XL Axiata (Internship)
Huawei
FEB 2022 - JUL 2022
- →Maintained and validated databases covering ~13,000 XL provider sites across the Java-Bali region, ensuring data accuracy, consistency, and confidentiality.
- →Managed battery asset data for all Java-Bali sites and coordinated ATP (Acceptance Test & Performance) punchlist rectifications, tracking and resolving reported site anomalies.
- →Supported operational stakeholders by handling partner inquiries, analyzing process gaps, and delivering reports and documentation to improve efficiency and decision-making.
Get In
Touch.
Happy to demo any system live.
Interested in building or scaling web systems? I'm always open to discussing projects, roles, or workflows.