Enrollment FunnelStarredScreenshotLiveFrontendBackendIntegration
Online Tutoring Sign-Up and Checkout
Prospective students pick a programme, fill in their details, see the price, and pay on the same page without waiting for an admin.
Examples of systems already running
A bilingual website that loads fast and shows up on Google.
More than code.Systems proven in a real business.
I design and build websites, web apps, backend systems, and AI automation. Before recommending an approach to clients, I apply it in Numekara, from the first page a visitor sees to the automation and AI that support my team.
Full-Stack Delivery
Frontend, backend, and AI are planned and built together by one accountable builder.
Built for Real Operations
Every page, endpoint, and automation is tied to how your business actually works.
Proven in Numekara
I build and use these systems in my own business before offering them to clients.
Three systemsbuilt for Numekara
Each project covers a different layer of the stack. I built them for Numekara first, and the same approach can be adapted to your business.
- Enrollment FunnelStarredScreenshot
AI and AutomationStarredScreenshotLiveAIBackendFrontendAI Tutor for Students
An AI tutor that guides students step by step in practice, lessons, and coding classes without handing out the answer key.
AutomationStarredScreenshot · sample dataLiveAutomationBackendIntegrationAutomated Reminders and Email Follow-Ups
A scheduled system that sends consultation reminders, follow-up emails to prospects, and subscription expiry notices without manual work.
Need something similar?
Tell me what your business needs to run better, and I'll propose the smallest system that solves it.
Why you cantrust the work
I'm early in my freelance journey, so instead of big logos I show proof you can check for yourself.
- projects in this portfolio
- 32
- real businesses running systems I built
- 2
Used every day
The systems I build run in Numekara, so I feel every bug and every improvement myself.
Details in a consultation
I show project details and live demos during a consultation, focused on what your business needs.
Consult on WhatsAppSee it before you hire
The Numekara case study shows what was built, how it connects, and what is measured.
Read the case study
Flagship case study
Numekara,built by Lumekara
A complete frontend, backend, automation, and AI system, built for the education business I run.
Numekara is the education business I run, and the place where Lumekara’s systems are built and tested first. It connects programme pages, online sign-up and payments, a lead management backend, follow-up automation, an AI tutor, and analytics into one working product.
How the system connects
- 1Website
- 2Sign-Up and Consultation
- 3Online Payments
- 4Backend and Database
- 5Lead Pipeline
- 6Follow-Up Automation
- 7AI Tutor
- 8Analytics
Want to see the details?
I walk through project details and live demos during a consultation, tailored to what your business needs. Tell me a little about it on WhatsApp and we'll find a time.
Academy
Numekara Coding,learn the skills behind these systems
Python, SQL, data, machine learning, and AI engineering, taught step by step.
Numekara Coding is the coding academy inside Numekara. Courses are written in Bahasa Indonesia: read a short explanation, run the code in your browser, and check each exercise before moving on.
- 13 published courses
- 199 step-by-step modules
- Python and SQL labs that run in the browser
- Foundation courses are free in full
What you can learn
Foundations
- Python from zero
- SQL and data from zero
- Shipping: from notebook to app
- Data structures and algorithms
Data and Machine Learning
- Data science and analytics
- Machine learning engineering
- Deep learning from the ground up
- Data engineering
- MLOps and ML platforms
Applied AI
- AI engineering
- Agentic engineering
- Applied NLP
- Applied computer vision
Career paths
- Data Scientist
- Data Engineer
- ML Engineer
- AI Engineer
- Agentic Engineer
Services and packagesfor small businesses to larger companies
Start with the need that matters most right now, such as a website people can find on Google or orders that no longer get lost in chat. Pick a package that fits, or bring a custom project. Pricing follows the scope, so small businesses can start small and larger companies can go straight to a fuller system.
- Website
Websites and Landing Pages
Websites that load fast on phones, show up on Google, and lead visitors straight to a chat or a purchase.
- Company profiles and landing pages
- Product catalogues with a WhatsApp order button
- QRIS, e-wallet, and virtual account payments
- Local SEO and Google Business Profile
- Bilingual sites (Indonesian and English)
- Web App
Web Apps and Internal Systems
For businesses outgrowing Excel, Google Sheets, and WhatsApp groups: tidy data and one place for the whole team.
- Custom apps shaped around your workflow
- CRM for leads and customers
- Admin panels, reports, and dashboards
- Memberships, subscriptions, or online courses
- Moving your data out of Excel or Google Sheets
- AI & Automation
AI and Work Automation
Cut repetitive work such as answering the same questions and reminding customers, while important decisions stay with your team.
- Chatbots that answer from your official documents
- Automatic reminders and follow-ups (email or WhatsApp)
- Website forms straight into Google Sheets or a CRM
- Order and lead alerts on Telegram or email
- Clear monthly limits on AI spending
- Care
Maintenance and Growth
Once your system is live, I help keep it secure, fast, and growing with your business.
- Monitoring and bug fixes
- Data backups and restore checks
- Security updates
- Step-by-step feature growth
For data teamsand larger companies
Packages for deeper AI work: models trained on your own data, agents that carry out work steps, AI that holds up in production, and AI that understands voice and images. Every project starts with a feasibility check, so you know from day one what can and cannot be achieved.
- Machine Learning
Machine Learning from Your Business Data
Use the sales, stock, or photo data you already have to forecast and spot patterns. Results are tested before use, and accuracy is reported as it is.
- Sales and stock demand forecasting
- Detecting and counting objects in photos or video
- A data feasibility check before the project starts
- Accuracy reports and the model's limits
- A dashboard to follow the predictions
- AI Agent
AI Agents for Operations
AI assistants that do more than answer: they look up data, triage questions, draft replies, and hand over to your team when a human decision is needed.
- Customer service assistants that hand conversations to your team
- Connected to your CRM, Google Sheets, or database
- Human approval before important actions
- A log of every agent step for review
- Evaluation tests before release
- AI Engineering
Multi-Model AI Engineering
For teams that need AI they can rely on in production: the right model for each task, a fallback when one service fails, and answers grounded in your documents, with predictable costs.
- Question answering over PDFs and internal documents, with sources
- Task routing and fallback across AI models (for example Gemini and OpenRouter)
- Reading documents and tables
- Guardrails and answer quality evaluation
- Spending caps and AI usage monitoring
- Multimodal AI
Multimodal AI: Voice and Images
AI that understands more than text: it listens to voice notes, reads photos and scanned documents, and replies in text or voice. We start with a small pilot on samples of your own data.
- Turning voice notes and meeting recordings into text and summaries
- Assistants that can answer by voice
- Reading photos of receipts, invoices, or forms into data
- Question answering about product photos or documents
- Human review for uncertain results
Custom project
Need something outside the packages?
I also take on custom projects, for small businesses and larger companies alike. We start from how your business runs today, then scope a system that fits, whether that's one small feature or a complete product.
Discuss a custom projectFor example:
- Internal systems shaped around how your team works
- Connecting the apps you already use, such as WhatsApp, Google Sheets, or a payment gateway
- AI features for a specific task
- Extending or fixing an existing system
Not sure which one you need?
Tell me the problem that bothers your business most. I'll suggest the most cost-effective step, whether that's a website, a web app, automation, AI, or a mix.
Built by someonewho runs a business too
Software only matters if people use it. Because I run Numekara myself, I design systems around real workflows, real teams, and real constraints.
You work directly with the person who designs, builds, and maintains your system, without hand-offs between vendors.
Full Stack in One Place
Frontend, backend, and AI are designed together, so the parts fit and nothing gets lost between vendors.
Practical AI
AI is used where it saves time or improves responses, not as a gimmick.
Proven in Numekara
The systems I offer are built and used in the education business I run.
Direct Communication
You talk to the builder directly over WhatsApp or video call. Regular updates, clear documentation, and no middle layer.
Outcome-Focused
Every feature is tied to a business result, such as faster responses or fewer manual tasks.
Built to Maintain
Clean code, a documented setup, and ongoing support keep the system working after launch.
From ideato a working system
A simple, transparent process that suits small businesses and teams in larger companies alike, from the first WhatsApp chat to support after launch.
- 01
Discovery Call
We talk through your goals, current workflow, and the tools you already use.
Understand the problem - 02
Scope & Proposal
We agree on the smallest system that solves the problem, with clear deliverables, timeline, and price.
No surprises - 03
Design & Build
I build the frontend, backend, automation, and AI parts in short iterations with regular demos.
See progress early - 04
Launch & Handover
We test with real data, deploy, prepare your team, and document how everything works.
Ready for real use - 05
Support & Improve
I monitor, fix, and improve the system based on how it is actually used.
Iterate with evidence
What you can expect
Clear scope
Agreed deliverables, timeline, and price before work starts.
Regular demos
Working software you can try throughout the project.
Human-controlled automation
Automation supports your team without hiding important conversations.
Documented handover
Clear documentation so your system stays understandable after launch.
From the blogpractical guides
Short, honest reads to help you plan your next website, system, or automation.
AI
4 min read
Multimodal AI for Business: Voice, Images, and Their Limits
Multimodal AI can listen to voice notes and read photos, not just text. Here are sensible business uses, the limits, and how to start safely.
Read articleAI
5 min read
AI Assistant for Company Documents: How RAG Works, Simply
A RAG-based AI assistant answers staff questions from your SOPs, manuals, and official policies. Here's how it works, without the jargon.
Read articleBackend
4 min read
Business Data Backups: Why Restore Drills Matter Just as Much
Having a backup doesn't mean your data is safe. Learn why backups fail when they're needed and how a restore drill proves your data can actually come back.
Read article
Let's build softwarethat works for your business
Whether you need a website, a custom web app, a backend integration, or AI automation, I can help you plan it, build it, and keep it running.
Good to share:
- What you want to build or fix
- The apps you already use (WhatsApp, Excel, Google Sheets, marketplaces)
- Your rough timeline and budget
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