DEBI PRAHARADIKA
PRODUCT ENGINEER10+ YRS / 40+ PRODUCTION PROJECTS

I BUILD AND EVOLVE SOFTWARE PRODUCTS FOR THE LONG RUN.

I turn product ideas, business workflows, and technical problems into production software. My work spans SaaS platforms, business applications, AI-powered workflows, and complex integrations. I work across the full product lifecycle, from understanding requirements and designing systems to shipping, maintaining, and evolving software in production. I use AI extensively to accelerate development, while remaining responsible for product behavior, architecture, data models, security, reliability, and technical trade-offs.

AI-Assisted Development

I use AI coding agents as part of my engineering workflow to explore solutions, generate code, test ideas, and iterate faster. AI helps me move faster, but it does not replace engineering judgment. I remain responsible for the product behavior,architecture, data model,security boundaries, validation, and final implementation.

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01 / SYSTEM ARCHITECTURE

HOW A PRODUCT BECOMES A SYSTEM

Interactive map of the product, workflows, application, data, integrations, and infrastructure. Click any block to explore the details.

COMPONENT DETAIL

Product

Focus: Requirements, Business Goals, User Flows

Defines what the product needs to solve, who it serves, and what outcomes the system should support.

debipraharadika.web.id // PRODUCTION-READY SYSTEMS // STABLE
VALUE METRICS

WHY WORK WITH ME

My engineering approach focuses on reliability, clear requirements, and keeping systems easy to maintain as they grow.

40+

PRODUCTION EXPERIENCE

I've built and shipped 40+ production applications, ranging from internal business systems to multi-tenant SaaS platforms.

100%

CLEAR COMMUNICATION

Regular updates, clear feedback, and realistic timelines. You'll always know where the project stands and what comes next.

DRY

MAINTAINABLE CODE

Clean, modular, spec-driven engineering with clear boundaries. Easy for other developers to understand, modify, and extend as the product grows.

02 / SELECTED PRODUCTS & SYSTEMS

PROJECT PORTFOLIO

Sightmill Multitenant SaaS NPS satisfactionSaaS

Sightmill Multitenant SaaS NPS satisfaction

Maintained and evolved a multi-tenant SaaS platform over nearly a decade, handling customer feedback across web, email, and SMS. Worked on backend development, integrations, database changes, payments, and ongoing production issues.

Demo project here →

CodeIgniterMySQLStripe APITwilio APIEmail AutomationZapier ZAPQuickBooks APISalesforce API
Multi-Role SaaS Investment PlatformSaaS

Multi-Role SaaS Investment Platform

Built a multi-role investment platform connecting the idea owners with investors and partners using Laravel Inertia, React, TypeScript, MySQL, Bootstrap 5, Websocket, Reverb, Stripe, PeerJS and Postfix.

Demo project here →

LaravelReactPostgreSQLWebsocketStripe API
Automated Product Damage Validation & Hybrid AI ChatbotAI / Automation

Automated Product Damage Validation & Hybrid AI Chatbot

I built an LLM-powered CS platform (cs.sinergivisi.my.id) that uses the Gemini API to automatically validate product damage claims. The core innovation is a fraud-prevention engine that compares user uploads against original photos to ensure authenticity.

Demo project here →

ExpressJSNodeJSPostgreSQLMCPWebSocketGemini API
Scalable Customer Feedback Hub & Product Roadmap SaaSSaaS

Scalable Customer Feedback Hub & Product Roadmap SaaS

Engineered a multi-tenant SaaS platform from MVP into a production system serving enterprise clients like Legal & General. The hub centralizes feature requests and product roadmaps.

CodeIgniterMySQLStripe APILinux
Full-Stack E-Commerce PlatformE-Commerce

Full-Stack E-Commerce Platform

Building an e-commerce platform (https://sinergivisi.my.id) for household tools. Users can make purchases and payments online, and the platform provides a REST API for use by MCP Toolbox. Claims for damaged or defective items are processed through AI agents or human agents, and recorded in claim reports. The platform consists of admin and buyer users, each with their own interface.

Demo project here →

LaravelPostgreSQLReactJSMCP ToolboxREST API
Multi-Tenant BI & Drag-and-Drop Reporting SaaSSaaS

Multi-Tenant BI & Drag-and-Drop Reporting SaaS

Built Visorum, a multi-tenant BI & reporting SaaS as a lightweight alternative to Power BI. The platform connects to external data via REST APIs, enabling users to create visual dashboards with a drag-and-drop builder (GrapesJS).

Demo project here →

CodeIgniterMySQLChrome HeadlessJavascriptGrapeJSREST APIOAuth
Enterprise Healthcare Training & Education Management SystemWeb Application

Enterprise Healthcare Training & Education Management System

Engineered a scalable web application to oversee the professional development of 800+ healthcare staff at a local hospital. This project required a complex modular architecture to build custom training, education, and reporting engines. I successfully integrated the new HTMIS with an existing Document Processing System and developed real-time analytics dashboards utilized by 20+ departments for budget planning.

Demo project here →

CodeIgniterMySQLJavascriptDatatablesREST APIReport Generator
Enterprise SaaS EDMS & Document Workflow AutomationWeb Application

Enterprise SaaS EDMS & Document Workflow Automation

Developed an Electronic Document Management System (EDMS) used across multiple departments to replace paper-based workflows. I built the backend infrastructure for document routing, approvals, and secure file management.

Demo project here →

CodeIgniterMySQLPDF ViewerJavascriptRBACREST API
WORK EXPERIENCE

PROFESSIONAL EXPERIENCE

10+ years of experience building and maintaining production software, from business applications and SaaS platforms to APIs, integrations, and legacy systems.

Independent Contractor

Full-Stack Developer & Consultant

2013 - Present

For more than a decade, I've worked independently as a full-time developer, helping clients build, improve, and maintain web applications across different industries.

My work has included:

- Building and maintaining multi-tenant SaaS applications, from database design and backend development through to deployment and server maintenance.

- Developing backend APIs with PHP/Laravel and Node.js, including integrations with services such as Stripe and PayPal for payment and subscription workflows.

- Working with older codebases and gradually improving them without disrupting systems that are already being used by customers.

- Integrating LLMs and AI services such as OpenAI and Claude into existing applications for automation, customer support, and internal workflows.

- Working directly with business owners and stakeholders to understand what they actually need and turn those requirements into practical technical solutions.

PHPLaravelCodeIgniterNode.jsExpressJSReactNext.jsPostgreSQLMySQLDockerTypeScriptJavaScriptTailwindCSSBootstrapSupabaseN8NAWSVercelSaaS ArchitectureDatabase OptimizationSystem DesignAPI DevelopmentAI IntegrationsPayment IntegrationsTwilioStripePaypal
CV. SuperSoft Teknologi

Web Application Developer

2010 - 2013

I worked for developing sms gateway system and mobile phone voucher information system.

I developed Sosial Networking and Accounting Information System (Saas Based).

PHPJQueryJavaScriptJavaMySQLLinuxApacheCSS/HTMLCURL
Koncept Digital Systems

Software Engineer

2009 - 2010

I developed project based on Open Source software or Open source Library.

On this position, I worked for developing accounting software, Implementing ip-pabx system and developing manufacture information system.

PHPJavaScriptjQueryExtJSMySQLAsteriskIPCopVmWareLinuxApacheCSS/HTMLCURLIPPBXOpenSIPS
03 / CORE CAPABILITIES

WHAT I WORK ON

Built projects from the initial idea through production, covering backend architecture, third-party integrations, and responsive frontend development.

(01)

Product Development

Turn product requirements and business workflows into production-ready software, from system design through implementation and deployment.

(02)

SaaS & Business Applications

Multi-tenant applications, internal tools, workflows, dashboards, permissions, payments, and third-party integrations.

(03)

AI-Powered Systems

AI-assisted workflows that combine LLMs with application logic, structured data, APIs, validation, and human review.

(04)

Database Architecture & Optimization

Database design, query optimization, indexing, and schema changes for applications with complex data.

(05)

System Evolution

Maintain, modernize, debug, and extend existing applications without unnecessarily rewriting systems that already work.

(06)

Integrations & Automation

Payments, webhooks, communication services, APIs, legacy systems, and workflow automation.

04 / ENGINEERING TOOLKIT

TECHNOLOGY STACK

Tools and technologies I've used across real-world production systems.

01. LANGUAGES //

Core Codebases

PHPJavaScriptTypeScriptNodeJSGolang
02. FRAMEWORKS //

Application Structures

LaravelExpressJSCodeIgniter
03. DATABASES //

Storage Engines

MySQLMariaDBPostgreSQLSupabaseSQLiteMongoDB
04. FRONTEND //

User Interfaces

React.jsNext.jsAlpine.jsjQueryBootstrapTailwind CSSGrapeJS
05. GATEWAY & API //

Payment & Comms

StripePayPalTwilioSendGridResendRESTful APIsCustom webhooksZapiern8nQuickBooksAsteriskFreePBX
06. ARTIFICIAL INTEL //

AI Technologies

Claude APIGemini APIOpenAI APIClaude CodeAntiGravity
07. DEPLOYMENT //

Cloud & Orchestration

DockerGitHub ActionsAWSVercel
08. UTILITIES //

Workflow Tools

LinuxSpec-Driven DevelopmentPostmanGitBootstrap studio
09. CMS //

Web Management

WordpressElementor
05 / CREDENTIALS & CERTIFICATIONS

LEARNING & DEVELOPMENT

A collection of technical courses, certifications, and credentials I've completed throughout my development career.

2026VIEW CREDENTIAL →
O'Reilly Media

Architecture Foundations: Styles & Patterns

O'Reilly Architecture Foundations: Styles & Patterns

The holder of this badge is capable of choosing appropriate architecture styles, analyzing trade-offs, and understanding the philosophy, rationale, and topology of common architecture styles.

ID: f91ef85b-7153-4966-97fc-493208e3a03f

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2026VIEW CREDENTIAL →
O'Reilly Media

Modern Engineering Practices

O'Reilly Modern Engineering Practices

The holder of this badge is capable of understanding and implementing modern engineering practices, including continuous delivery, automated provisioning, release strategies, and architecture governance. They have the knowledge and tools to apply these concepts in their own projects.

ID: 0a2dc41c-e69e-4712-9420-92d3dcb72702

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2026VIEW CREDENTIAL →
O'Reilly Media

Machine Learning

O'Reilly Machine Learning

The holder of this badge is capable of building machine learning algorithms from scratch using Python, including linear regression, logistic regression, Naïve Bayes, decision trees, and neural networks. They have a better understanding of how machine learning works and can use libraries (or build them from scratch) more confidently.

ID: cfc6403f-dbd1-47d5-a298-feb763c3c3c4

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2026VIEW CREDENTIAL →
O'Reilly Media

Modular Monoliths

O'Reilly Modular Monoliths

The holder of this badge is capable of understanding modular monolith architecture, decomposing problems for modular design, and assessing the trade-offs involved. They can apply this knowledge to design simple applications that can scale if needed.

ID: 21357403-d509-4572-870a-298b1acb49a8

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2026VIEW CREDENTIAL →
O'Reilly Media

Modern Enterprise Architecture

O'Reilly Modern Enterprise Architecture

The holder of this badge is capable of understanding how enterprise architecture fits within an organization, preventing enterprise architecture efforts from failing, and developing and analyzing enterprise project portfolios.

ID: 401a9cf1-31cb-4586-ab33-81725fc043eb

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2026VIEW CREDENTIAL →
O'Reilly Media

Vibe Coding vs Spec-Driven

O'Reilly Vibe Coding vs Spec-Driven

The holder of this badge is capable of understanding the differences between vibe coding and spec-driven development workflows, designing structured specifications, demonstrating how AI tools behave with vague prompts versus structured specs, and applying a spec-driven workflow to build software more reliably with AI tools.

ID: 4a974e1a-6085-473e-875d-26e8dda3dfe3

Show certificates here →

2020VIEW CREDENTIAL →
Brainmatics

Enterprise Architecture Advanced

Brainmatics Enterprise Architecture Advanced
  • 1. Preliminary Phase
  • 2. Architecture Vision Phase
  • 3. Business Architecture Phase
  • 4. Data Architecture Phase
  • 5. Application Architecture Phase
  • 6. Architecture Implementation Phase

ID: 1DOPT.17578.20

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2020VIEW CREDENTIAL →
Brainmatics

Enterprise Architecture Basic

Brainmatics Enterprise Architecture Basic
  • 1. Introduction to EA
    • 1.1. What Is EA and Why Use It?
    • 1.2. Benefits and Advantages of EA
    • 1.3. EA vs. IT Roadmap vs. Governance
    • 1.4. EA and Digital Transformation
  • 2. EA Development Methodology
    • 2.1. EA Methods and Tools
    • 2.2. Introduction to BPMN
    • 2.3. Introduction to UML
    • 2.4. EA Development Case Studies

ID: 1DOPT.17532.20

Show certificates here →

05 / PROJECT INITIATION

HAVE A PROJECT IN MIND?

Tell me what you're building, what is currently not working, or what you need to improve.

AVAILABILITY
AVAILABLE FOR PROJECTS

Usually replies within 24 hours

HIRE ME ON
UpworkContra
EMAIL ADDRESS
debipraharadika@gmail.com

PROJECT SCOPE