Backend systems.
Fintech flows.

Backend developer in fintech, working with Java, Spring Boot, JSP, and Kafka.

Consult via WhatsApp View Portfolio

Karya Agung Perkasa Ekspedisi

Live Website Astro, Tailwind CSS

Spring Boot Automation API

API Docs Spring Boot, Swagger

LOS Core System

LOS System Spring Boot, PostgreSQL
Explore my fintech experienceExplore Services

Behind the flow
of fintech.

Backend Developer in Fintech

I currently work as a backend developer at a fintech company, handling core systems, disbursement flows, payment gateways, and JSP-based interfaces.

Explore my project work

Core system

Backend development for the company’s core system.

Disbursement flow

Development of the flow that handles fund disbursement.

Payment gateway

Backend development for payment gateway workflows.

JSP interfaces

UI development with JavaServer Pages alongside the backend.

Backend
Java Spring Boot
Server-rendered UI
JSP
Messaging
Kafka
Small Business Startup Portfolio Internal Tool API

What do you
need to build?

SEO structure, fast performance, and maintainable technical foundations.

Website Development

Business websites, company profiles, portfolios, and service pages that are responsive and SEO-ready.

Service details

Landing Page Development

Conversion-focused landing pages for products, services, ad campaigns, and personal brands.

Service details

Admin Dashboard

Internal dashboards with clean layouts, data tables, filters, charts, and role-ready UI.

Service details

Business Automation

Automation for data entry, reporting, digital workflows, and repetitive operational processes.

Service details

Machine Learning

ML prototypes for classification, prediction, clustering, recommendation, and data analysis.

Service details

API Integration

REST APIs, payments, maps, authentication, webhooks, and third-party service integrations.

Service details

System Integration

Connecting systems, dashboards, spreadsheets, APIs, and business operation tools.

Service details

Deploy & Hosting

Domain, hosting, deployment, environment, SSL, and basic performance tuning setup.

Service details

IT Thesis Assistance

Implementation support for systems, DSS methods, CRUD, reports, demos, and technical documentation.

Service details

Technology selected for practical delivery.

Grouped by role so the stack is easier to scan across desktop and mobile.

Frontend Core

5

Language, markup, and styling foundations.

JavaScript
TypeScript
HTML5
CSS3
Tailwind CSS

Frontend Frameworks

4

UI frameworks for interactive and static delivery.

React JS
Next JS
Vue JS
Astro

Server-rendered UI

1

Interfaces rendered with JavaServer Pages.

JSP (JavaServer Pages)

Backend Languages

4

Server-side runtimes used across APIs and jobs.

Node JS
Python
PHP
Java

Backend Frameworks

3

Application frameworks for structured backend builds.

Laravel
CodeIgniter
Spring Boot

Data Stores

4

Relational databases and backend data platforms.

PostgreSQL
MySQL
Microsoft SQL Server
Supabase

Cloud & Hosting

6

Infrastructure, hosting, CDN, and cloud platforms.

Google Cloud Platform
Amazon Web Services
Microsoft Azure
Oracle Cloud
VPS
Cloudflare

DevOps & Delivery

8

Container, orchestration, messaging, and source control.

Docker
Kubernetes
Red Hat OpenShift
Kafka
Git
GitHub
GitLab
Bitbucket

AI Assisted Tools

6

Tools for coding, automation, and local AI workflows.

Cursor
GPT
Codex
Claude
Warp
Ollama

Mobile

2

Mobile app development and build environments.

Android Studio
Flutter

Built for
real workflows.

Company websites, API documentation, and operational systems.

Karya Agung Perkasa expedition website with shipping services and delivery fleet

Karya Agung Perkasa Ekspedisi

Company profile website for an expedition service with service pages, WhatsApp contact flow, and mobile optimization.

  • Company profile
  • Expedition services
  • WhatsApp contact
  • Responsive design
AstroTailwind CSS
View detailsOpen Project
Swagger API documentation screenshot

Spring Boot Automation API

Backend automation system with endpoint documentation through Swagger.

  • REST API
  • Swagger documentation
  • Automation flow
  • Machine learning prototype
Spring BootSwaggerPythonPlaywrightTensorFlow
View details
LOS System screenshot

LOS Core System

Loan origination core system for loan, payment, customer, and reporting workflows.

  • Loan management
  • Payment management
  • Customer management
  • Report management
Spring BootPostgreSQLSocket.ioWebSocketSSO
View details

From discussion
to launch.

Clear requirements. Trackable milestones.

  1. Requirement review

  2. Proposal & estimate

  3. UI design

  4. Development

  5. Testing

  6. Deploy

  7. Maintenance

Website, API,
and landing page delivery.

Client review placeholders from the original portfolio. Awaiting approved attribution.

Web and system projects
10+
Initial response
<24h
Mobile-first delivery
100%

“The website structure was clean, mobile friendly, and easy to connect with WhatsApp.”

Business Website Client / Company profileReview placeholder

“The endpoints, documentation, and workflow were clear enough to maintain.”

Client Backend System / API & dashboardReview placeholder

“The page loaded quickly, the offer was clearer, and the CTA was easy to find.”

Client Landing Page / Campaign landing pageReview placeholder

Before we
start.

Scope, timelines, and how we work together.

What services does Padtech provide?

Core services include website development, landing page development, business automation, API integration, WhatsApp automation, backend development, admin dashboards, deployment, and maintenance.

Do you work with international clients?

Yes. Projects can be delivered remotely for startups, small businesses, personal brands, agencies, and teams across different markets and time zones.

How long does a landing page project take?

A focused landing page usually starts from 3 to 7 working days after the brief, content, design references, conversion goal, and required sections are clear.

Do you provide API integration and WhatsApp automation?

Yes. Implementation can include REST APIs, webhooks, internal dashboards, WhatsApp notifications, automated workflows, and integrations with business tools.

How do I start a project discussion?

Send a short brief through WhatsApp with your goal, deadline, references, main features, and estimated budget. The scope will be broken into clear next steps.

Send your project brief and get a clearer scope breakdown.

Useful for business websites, landing pages, automation, API integration, WhatsApp workflows, and freelance backend development.

Consult Now
Padtech developer brand

Web, API, Automation

Fintech backend developer. Freelance technical partner.

I currently work as a backend developer at a fintech company, handling core systems, disbursement flows, payment gateways, and JSP interfaces with Java, Spring Boot, and Kafka.

Alongside my fintech role, I take on freelance websites, admin dashboards, API integration, and automation projects, from planning and development through deployment and maintenance.

Backend DevelopmentCore SystemsDisbursementPayment GatewayJSP UI
CV LinkedIn GitHub Portfolio Website

Let’s build your next project.

Send a short brief with your project goal, deadline, design references, main features, and estimated budget. I will help break the scope into clear technical next steps.

Response time

Initial response is usually within 24 hours on working days.

Consult via WhatsApp

All fields are required. Your brief opens in WhatsApp for you to send.