Hire the Best Backend Rest API Freelancers
in Indonesia

I help SaaS founders fix messy backends, inconsistent UIs, and slow-loading products with a 100% Job Success Score across 20+ delivered projects in the past year. I specialize in AI Integration for SaaS products building RAG-based knowledge systems and OpenAI/Claude-powered automation, from LLM-integrated chatbots to multi-tenant SaaS platforms. I can help with: • SaaS Product Development • Startup MVP Development • AI Automation & OpenAI/Claude Integration • RAG & Knowledge-Based Systems • Startup MVP Development • API Integrations & Backend Systems Core Technical Stack: - Frontend: React, Next.js, Astro.js, Tailwind CSS, TypeScript - Backend: Node.js, Express.js - Headless CMS: Payload CMS, Strapi, Sanity. - AI & Intelligent Systems: OpenAI API, Claude, RAG, LLM Integration, Chatbot Development - Databases: Supabase, PostgreSQL, MySQL - Deployment: Vercel, AWS, DigitalOcean If you're building a SaaS product or need AI capabilities integrated, let's schedule a quick chat. Available to start immediately.

I help founders and teams get unstuck when a Laravel, React, or Next.js product needs to move forward without breaking what already works whether that's stabilizing an existing SaaS, extending an admin panel, or picking up a codebase someone else left behind. Top Rated on Upwork, 100% Job Success, $20k+ earned. Where I fit best: ✔ Laravel backend development, API integration, and database design ✔ Stabilizing, auditing, and extending existing SaaS platforms ✔ React / Next.js dashboards, admin panels, and internal tools ✔ Bug fixing, performance work, and ongoing maintenance ✔ Full-stack builds when the project needs both ends done right I'm comfortable working alongside AI-assisted workflows (Claude Code, Cursor). I use them to move faster, but I still read and understand every line that goes into your project before it ships. What clients say: "Kezia produces very high quality work and is committed to successful outcomes." — client review, SaaS code review project "Kezia is genuinely impressive... on time, reliable, very proactive, and goes above and beyond the brief." — client review, ongoing project I ask clarifying questions before I start rather than guess and redo work later, and I give daily progress updates so you're never wondering where things stand. If something outside scope needs fixing, I flag it and ask before touching it, not after. If you have an existing Laravel or React/Next.js project that needs a steady hand, send me the details and I'll tell you honestly how I'd approach it.

Hi! I'm a Software Engineer and the Founder of PT Heroic Inovasi Nusantara (HINAI Tech). I help businesses, startups, educational institutions, and organizations build reliable digital products that solve real business problems and support long term growth. I specialize in designing and developing custom web applications, Android applications, REST APIs, business systems, and SaaS platforms using modern technologies. Every solution I build is focused on performance, scalability, security, and maintainability, ensuring your software is ready not only for today but also for future growth. Whether you're launching a startup, digitizing business processes, creating an internal management system, or building a customer-facing application, I'm committed to delivering clean, production-ready software with clear communication and reliable support throughout the project. ━━━━━━━━━━━━━━━━━━━━━━ MY EXPERTISE ━━━━━━━━━━━━━━━━━━━━━━ 1. Web Application Development • Next.js • React.js • TypeScript • JavaScript (ES6+) • HTML5 & CSS3 • Responsive & Mobile-First Development • Admin Dashboard Development • SaaS Application Development • Landing Pages & Business Websites 2. Android Application Development • React Native & Expo • Progressive Web Apps (PWA) • Mobile UI/UX • API Integration • Firebase Integration • Google Play Store Deployment 3. Backend Development • Python (Django, FastAPI, Flask) • Node.js & Express.js • REST API Development • Authentication & Authorization • Third-Party API Integration • Payment Gateway Integration • Business Logic Development 4. Database • PostgreSQL • MySQL • MongoDB • Cloud Database • Database Design • Query Optimization 5. Software Architecture • Scalable System Design • Clean Architecture • Performance Optimization • Code Refactoring • Bug Fixing & Troubleshooting • Deployment & Maintenance 6. AI & Automation • AI-Powered Web Applications • OpenAI API Integration • AI Chatbots • Workflow Automation 7. SEO Content Writing Besides software development, I also write SEO-optimized articles focused on technology, software engineering, artificial intelligence, programming, education, and digital business. My content is written for both search engines and real users, helping businesses improve visibility while delivering valuable and engaging information. ━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━━━━━━━━ ✔ Clean, maintainable, and production-ready code ✔ Scalable software built with best engineering practices ✔ Strong analytical and problem-solving skills ✔ Experience building complete web and Android applications ✔ Clear communication and regular progress updates ✔ Reliable delivery with attention to detail ✔ Business-focused solutions, not just technical implementation As both a Software Engineer and a company founder, I understand that software is an investment. My approach is to understand your business objectives first, then build solutions that are reliable, scalable, and easy to maintain. I believe successful projects are built on trust, communication, and quality. Whether your project is large or small, I am committed to delivering software that meets your expectations and contributes to your business success. If you're looking for a dependable Software Engineer who can build modern web applications, Android apps, backend systems, APIs, AI-powered solutions, or SEO focused technical content, I'd be happy to discuss your project. Let's build software that creates real value for your business.

I have worked as a professional Web Developer for over 5+ years and now working full time as a freelancer. My main specialization is a Full Stack development of rich web apps based on JavaScript stack of technologies. My passion for design & technology turned into providing professional, attractive, user-friendly, and SEO-friendly web solutions that integrate a successful marketing strategy. These are the skills I have: ✅ React.js, Redux, Hook ✅ Next.js, Gatsby.js, Remix, Laravel ✅ Tailwind CSS, Sass, Charka UI, Material UI, Ant Design ✅ HTML, CSS, JavaScript, TypeScript, PHP ✅ Node JS (Express.js), Firebase, Supabase, NestJs ✅ Integration of third-party Rest API ✅ Database (MongoDB, MySQL, PostgreSQL) ✅ Git (Github, Gitlab, Bitbucket) ✅ SEO (JSON-LD, Schema Markup, Meta Tags) ✅ Nginx, Vercel, Netlify, Heroku, DigitalOcean, AWS ✅ PHP (Laravel) ✅ Google Analytics, Search Console ✅ Routeros (Mikrotik)

Hi! I'm a backend developer with 10+ years of experience helping startups turn messy ideas into working products — fast. I've spent most of my career inside startup teams, building things from zero, breaking them, fixing them, and shipping again. So I get it: you don't need a perfect system, you need something that works, scales when it has to, and doesn't fall apart at 2 AM. What I can build for you: 1. Backend systems & APIs in Laravel (PHP) or Node.js 2. Web scrapers & data pipelines (Python / Node.js) — even on tricky, JS-heavy sites 3. Automations that save your team hours every week 4. SaaS MVPs and internal tools, deployed on AWS 5. AI-powered features (LLM integrations, data processing workflows) Why founders like working with me: 1. I write clean, production-ready code — not throwaway scripts 2. I communicate like a teammate, not a vendor 3. I think about your business, not just the ticket If you're a founder who needs a backend partner who can move fast without cutting corners, let's chat. Happy to do a quick call to see if we're a fit.

I help startups and businesses build SaaS applications, customer portals, internal business systems, and GIS-enabled platforms using Laravel, React, Next.js, and modern API-driven architectures. With 8+ years of experience and 200+ completed projects, I've developed SaaS products, workflow systems, dashboards, GIS applications, and custom business platforms used by startups, organizations, and government institutions. My expertise goes beyond implementation. I help clients design scalable systems, structure business workflows, and build applications that can grow with their operations. I can help with: ✅ SaaS application development ✅ Customer and client portals ✅ CRM and workflow systems ✅ Admin panels and dashboards ✅ GIS and mapping platforms ✅ API integrations ✅ Multi-tenant applications ✅ Marketplace platforms ✅ Internal business systems ✅ Payment-enabled platforms ━━━━━━━━━━━━━━━ Recent Project Experience ━━━━━━━━━━━━━━━ • SaaS booking platforms built with Laravel and Next.js • GIS platforms using MapLibre, Mapbox, and OpenLayers • Financial and workflow management systems • Government collaboration and data management platforms • Marketplace and customer portal applications • API-driven applications integrating third-party services and payment systems ━━━━━━━━━━━━━━━ Tech Stack ━━━━━━━━━━━━━━━ Backend : - Laravel - PHP - REST API - PostgreSQL - MySQL Frontend : - React.js - Next.js - Vue.js - Nuxt.js - Tailwind CSS GIS & Mapping : - MapLibre - Mapbox - OpenLayers - PMTiles Infrastructure : - AWS - Docker - Vercel - Coolify - Linux Server ━━━━━━━━━━━━━━━ Why Clients Work With Me ━━━━━━━━━━━━━━━ ✔ Strong communication ✔ Clean and maintainable code ✔ Business-oriented problem solving ✔ Scalable application architecture ✔ Experience building products from scratch ✔ Long-term technical partnership mindset ✔ Ability to translate complex requirements into practical solutions If you're building a SaaS platform, customer portal, GIS application, or internal business system and need someone who can handle architecture, development, and long-term scalability, I'd be happy to discuss your project.