Jericho Alfa Dio

Full Stack Developer with 3+ years of experience designing enterprise applications, ERP systems, relational database architectures (PostgreSQL, MySQL), and multiservice platforms using Laravel, Django, and ASP.NET. Skilled in software architecture, RESTful API design, authentication, validation, versioning, performance optimization, payment gateway integration, and third-party system integration. Solo-architected and scaled a production e-commerce platform serving 20,000+ active users and developed backend services for an internal ERP platform supporting 250+ enterprise users.

Full Stack Web Developer at Hartono Elektronika (PT Hatsonsurya Electric) (2024-12 – 2026-07)

• Designed and built backend services (Django and C# ASP.NET) and full-stack features for Hartono Management System, an enterprise ERP platform supporting 250+ internal staff, delivering functionality across Buyer Management, Vendor Portal, Audit Management, and Finance Management modules.
• Delivered 25+ end-to-end features, leading technical design through cross-feature impact analysis, DFD/ERD modeling, and implementation while partnering with Business Analysts to translate business requirements into scalable system.
• Designed REST APIs to integrate delivery, business, and audit modules into a unified platform.
• Managed PostgreSQL databases in production, focusing on data integrity and reliability across cross-functional business workflows.
• Built responsive web interfaces using HTML, CSS, and JavaScript, translating Figma designs into web applications while ensuring cross-browser compatibility and responsive layouts.
• Containerized services with Docker and integrated AWS S3 for file storage, standardizing deployment across projects.

Full Stack Developer at Duta Sarana Computer (CV. Duta Sarana Sejahtera) (2023-06 – 2024-11)

• Replaced a legacy WordPress site, outdated and limited to basic product listings and a landing page with a full-featured e-commerce platform built on Laravel, owning backend architecture, database design, and transaction logic end-to-end (live Dec 2023 – Dec 2025).
• Built product, and multi-branch inventory/price management, plus shipping and pickup logistics with third-party shipping-cost integration, and payment gateway integration supporting a catalog of 2,500+ SKUs
• Implemented technical SEO improvements, including metadata management, sitemap generation, structured URLs, robots.txt, and performance optimization, contributing to 7,000+ registered users acquired within the first year through organic search.
• Identified and resolved bugs through systematic testing within a CI/CD pipeline, working independently across the project to ensure production reliability.
• Supported internal network infrastructure (VPN and route across 6 branch offices) during the same period.
• Built secure, scalable backend systems powering core e-commerce functionality product catalog, shopping cart, payment gateway integration, and order management.

Bachelor of Informatics Engineering in Informatics Engineering – University of Surabaya (2018-08 – 2024-08)