Resume of Putra Hidayat Arifin — Full-Stack Developer & AI Engineer

Experience

1. Web Developer Intern — Kuala Tanjung Multipurpose Terminal

   Aug 2021 - Aug 2022

   • Managed the IT Help Desk independently, resolving 100+ technical issues per month and reducing average response time by ~30% through improved triage and escalation workflows.
   • Contributed to company website development and built a new internal application end-to-end (UI, APIs, database) that streamlined port operations reporting.
   • Upgraded internal tools with basic analytics dashboards and wrote handover runbooks adopted by the permanent IT team.

   Stack: PHP, jQuery, Bootstrap, Oracle Database, MySQL, RESTful APIs

2. Freelance Full-Stack Developer & AI Engineer — Independent (Remote, International Clients)

   Jan 2022 - Present

   • Delivered multiple web application projects for international clients remotely, managing requirements gathering, development, QA, and deployment independently.
   • Built RAG (Retrieval-Augmented Generation) pipelines so client knowledge bases can be queried in natural language, integrating vector databases, embedding APIs, and LLM endpoints.
   • Developed prompt engineering frameworks for content generation, data extraction, and customer-facing chatbot workflows using OpenAI GPT and Anthropic Claude APIs.
   • Designed and deployed AI agent systems for multi-step task orchestration, including web data retrieval, document summarization, and automated report generation.
   • Maintained async communication practices with structured daily and weekly updates, delivering every project before the agreed deadline across EU, US, and SEA time zones.

   Stack: React.js, Vue.js, Node.js, Laravel, OpenAI API, Anthropic Claude API, LangChain, RAG pipelines, Vector Databases, Prompt Engineering, AI Agents, Docker, GitHub Actions

3. Full-Stack Developer — PT Laris Cargo

   Oct 2022 - Feb 2025

   • Sole owner of the Help Desk platform (UI, APIs, database), handling 150+ tickets per month with minimal service disruption across a distributed operations team.
   • Modernized the company website and architected a new line-of-business application end-to-end, including data models, service layers, and third-party integrations.
   • Automated SLA timers, task queues, and webhook workflows, lifting team operational efficiency by ~20% and reducing manual handoff errors.
   • Optimized database queries and implemented caching strategies that significantly cut critical page load times for drivers and dispatchers.
   • Integrated LLM-powered AI agents to auto-generate shipment status summaries and answer common customer queries, reducing support workload.

   Stack: Vue.js 3 / Vuetify, Laravel, CodeIgniter 3, Bootstrap / Tailwind CSS, Node.js (Express.js), Socket.io, MySQL, RESTful APIs, LLM Integration, Prompt Engineering

4. Full-Stack Developer — PT Tirta Medical Indonesia

   Feb 2025 - Present

   • Own the full reliability stack — UI, API, and data layers — across partner hospital platforms, sustaining 99.9% uptime through disciplined release cycles and proactive monitoring.
   • Lead production support operations: incident triage, root-cause analysis, and hotfix delivery, cutting average time-to-resolution by ~40% and minimizing patient-facing downtime.
   • Execute end-to-end partner rollouts (environment provisioning, configuration, third-party integration), accelerating hospital onboarding and improving compatibility with existing hospital systems.
   • Deliver stakeholder progress updates after every sprint cycle and major incident, and maintain detailed runbooks and deployment logs to support async team workflows.
   • Implemented AI-assisted triage logic using LLM-based prompt workflows to auto-categorize support tickets, reducing manual classification time.

   Stack: PHP, jQuery, Bootstrap, Tailwind CSS, MySQL, GitHub Actions, Git, RESTful APIs, LLM Integration (AI triage automation)