Hi, I'm Kaesar 👋

PHP & JavaScript Developer specializing in Backend Architecture & System Design - building production-grade web systems with Laravel, Next.js, and REST APIs. Open to remote & international roles.

Jakarta, Indonesia

Available for new projects

About me

Curious about me? Here you have it:

As a PHP & JavaScript Developer specializing in backend architecture and system design, I build fast, reliable web systems from the ground up - from database schema to deployed API to polished frontend. I have a strong focus on clean code, maintainable systems, and production-ready solutions that scale. I believe great products are built on clear technical decisions and seamless collaboration across engineering, design, and product.

Finally, some quick bits about me.

💡 Tech enthusiast with a passion for continuous learning and problem-solving.
⚙️ PHP · Laravel · JavaScript · Next.js - shipping production systems since before graduation.

🏗️ Already integrated Google Gemini, Groq API, and Midtrans in production - not just exploring.
🚀 Currently leading a 3-person team building a web platform for 100+ users.

Skills

The skills, tools and technologies I am really good at:

Javascript

Typescript

Next.js

Flutter

Kotlin

Laravel

PHP

HTML

CSS

Tailwindcss

Three.js

Dart

Work

Some of the noteworthy projects I have built:

Tripaw - AI Trip Planner

Laravel 13 + Livewire 4 AI travel platform - Claude Sonnet → Gemini 2.5-flash → Groq fallback cascade with 45s latency budget & auto-failover. Midtrans Snap payments, Filament 5 admin + AppEvent observability (AI latency, slow queries >800ms), GitHub Actions CI/CD. 9 tables, 20 Livewire components.

Laravel

PHP

Javascript

Tailwindcss

TDR Seamless Transaction

Laravel 12 e-commerce platform with affiliate system - 18 tables, 55+ routes, Midtrans + Telegram Bot webhooks, multi-role affiliate commission engine, Filament 3 admin, and 9-container Docker stack with Prometheus + Grafana monitoring. CI/CD via GitHub Actions.

Laravel

PHP

Tailwindcss

Javascript

Company Profile Web PT. Saritama Dharma Buana

Next.js 15 App Router marketing site for a Jakarta pest control company. 8 fully responsive pages, 3 service verticals, 52 shadcn/ui components, 6 documented portfolio projects, service coverage across 8 cities. Contact form with file upload, 5-year warranty terms, and WhatsApp deep-link CTA.

Next.js

Javascript

Klinik Sehat Selalu

Next.js 16 + Supabase clinic management system. 6 role dashboards (patient, doctor, pharmacist, nurse, cashier, admin), 42 pages, 38 API routes, 21-table PostgreSQL schema, real-time queue with 30s polling, pharmacy inventory management, and printable billing receipts.

Next.js

Javascript

Typescript

RumahAman

Kotlin + Jetpack Compose Android app (Clean Architecture MVVM). 16 screens, Groq API AI counselor (Llama 3.3 70B), recommendation engine for 3 service types across 4 violence categories, 8 Hilt-injected repositories, Firebase FCM via Cloud Functions (Node.js 22).

Kotlin

Javascript

Trajectoria

Flutter + Firebase cross-platform app (6 platforms, 276 Dart files). 35 screens, 2 user roles, Google Gemini 2.5 Flash AI submission review via Cloud Functions, 62 use cases, 46 BLoCs, 5-level learning hierarchy across 13 Firestore collections. Strict Clean Architecture with Dartz Either.

Flutter

Dart

HTML

SolarQuiz

Single-file 3D solar system game - Three.js v0.160.0 + vanilla JS, 667 lines, zero dependencies. 8 textured planets with real-time orbital mechanics, 3000-particle star field, raycasting hover, 40-question quiz engine (5 per planet, shuffled answers), and 3 scene control sliders. Deployed on Vercel.

HTML

CSS

Three.js

Javascript

Experience

Here is a quick summary of my most recent experiences:

Back-End Engineering Trainee · Maxy Academy Bootcamp

Delivered Tripaw (Laravel 13 + Livewire 4 + multi-provider AI cascade: Claude Sonnet → Gemini 2.5-flash → Groq, 45s latency budget) and TDR Seamless Transaction (Laravel 12 + Midtrans + Telegram Bot + Docker) as sole Full-Stack developer and System Analyst respectively - both within 48-hour sprint windows.
Applied production-grade patterns: AI fallback with auto-failover, Filament 5 admin + AppEvent observability, 9-container Docker stack with Prometheus + Grafana monitoring, and GitHub Actions CI/CD matrix (PHP 8.3–8.5).

Feb 2026 – Present

Head of Website Development & Information Systems · UKM Seni Religi Brawijaya University

Leading system design and team coordination for the organization's official web platform (in active development) - architected Supabase (PostgreSQL) database schema for 100+ active members, and provisioned VPS + Nginx infrastructure.
Coordinating a 3-person cross-functional team (frontend developer + UI/UX designer) through full sprint cycles: requirements → DB design → API → staging deployment.

Jan 2026 – Present

Full-Stack Developer (Freelance) · PT. Saritama Dharma Buana

Built and deployed a 7-page company profile website (saritama.vercel.app) as sole developer, covering 3 service categories (Pest, Rodent & Termite Control) - replacing zero digital presence with a fully production-ready platform in under 4 weeks.
Implemented SEO-optimized architecture, WhatsApp CTA conversion flow, FAQ accordion, and project gallery - enabling direct digital client acquisition from day one.

Dec 2025 – Present

System Analyst · Software Engineering Event 9.0 by Telkom University Purwokerto

Acted as System Analyst for Trajectoria in SEVENT 9.0, a national-level software engineering competition - defined ERD, use case diagrams, data flow diagrams, and API contracts for a cross-platform Flutter app before a single line of code was written.
Delivered complete technical documentation under competition time constraints, demonstrating structured analytical thinking and the ability to translate business requirements into engineering-ready specs.

Oct 2025 – Dec 2025

Product Management Member · Google Developer Groups on Campus Brawijaya University

Authored a full Product Requirements Document (PRD) as capstone project, covering complete system workflows, user story mapping, feature specifications, and acceptance criteria - bridging the gap between business needs and technical implementation.
Developed cross-functional communication skills across engineering, design, and business tracks - critical for distributed remote teams.

Oct 2024 – Feb 2025

Get in touch

What's next? Feel free to reach out for collaboration or project discussions.

adamemier16@gmail.com

You may also find me on these platforms