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Leon Fernando Wijaya — Software Engineer & Full-Stack Developer

Leon WijayaSoftware Engineer
CurrentlyFull-Time
L//FW

I build high-performance APIs, scalable microservices, and full-stack digital solutions to streamline enterprise workflows.

Leon Fernando WijayaSoftware Engineer
Software EngineerFull-Stack & Backend
Leon Fernando Wijaya logo

SimplifyingWorkflows

Scaling Systems, Simplifying Workflows

Who Am I
Like Really?Who Am I
(Introduction)

Taking everyday stories, and transforming them into tangible experiences through design. See what we create here

Leon Fernando Wijaya — casual portrait
Leon Fernando Wijaya — studio portrait
(01)
(About)

I build high-performance systems through APIs, microservices, and full-stack engineering.

Starting my journey in 2024, working as a technical consultant, later specialising in backend architecture and microservices. Building enterprise tools through scalable APIs, crafting RBAC systems, HRIS platforms, and CRM backends.

In 2025, I started to specialise in full-stack development, combining backend precision with modern frontend solutions — taking products from wireframe all the way to deployment.

Today, as a Junior Software Engineer at Multi Power Aditama, I maintain and evolve warehouse management systems handling Purchase Orders, Delivery Orders, and real-time inventory — while architecting new Analytics API services that capture client interaction data to drive data-driven decisions across the business.

Tech Stack

React
Next.js
TypeScript
JS
JavaScript
NestJS
Laravel
Drizzle ORM
TypeORM
Firebase
PostgreSQL
MySQL
GSAP
GSAP
Tailwind CSS

A highly specialized collection of tools and frameworks curated to design, build, and deploy reliable digital solutions and seamless user interfaces.

Building scalable systems through a range of technologies, guiding every step from architecture to deployment

Branding & Design service — UI/UX and visual identity

Branding & Design

Crafting unique visual identities and UI/UX flows. Establishing visual systems, design guidelines, and seamless interfaces that stand out.

Backend Architecture service — APIs and microservices

Backend Architecture

Designing secure database schemas, microservices, and robust APIs. Optimizing systems for maximum security, speed, and heavy data traffic.

Full-Stack Engineering service — React, Next.js, Node

Full-Stack Engineering

Bringing products from wireframes to active deployment. Creating seamless full-stack integrations using modern React, Next.js, and Node.

WORK

(02)Now For The Good Stuff
Warehouse Management System project cover
Warehouse Management System2026
Mining Expo PWA project cover
Mining Expo PWA2025
Analytics API Service project cover
Analytics API Service2026
Centralized "My Approvals" System project cover
Centralized "My Approvals" System2025
(More Projects)

Looking for more? below are more projects completed over the past few years

Machinery Hub API

Built a sparepart interchange lookup engine mapping compatibility matrices and part cross-references across multiple machine categories to optimize parts searching.

Tech StackNestJS, TypeORM, PostgreSQL
Year2025
Microservices RBAC & HRIS Infrastructure

Architected and developed a microservices-based API infrastructure supporting multi-platform deployments, featuring secure Role-Based Access Control and a unified employee data hub.

Tech StackNestJS, PostgreSQL
Year2025
Enterprise Custom CRM System

Developed high-performance APIs for a custom CRM backend to streamline client tracking, pipeline planning, and transaction flows for the corporate sales team.

Tech StackLaravel, NestJS, MySQL
Year2025
Dynamic Internal Form Builder

Contributed to the development of a dynamic internal form builder with customizable templates and configurable approval workflows to standardize data collection across teams.

Tech StackLaravel, React, MySQL
Year2024
Internal Project Management Platform

Helped build an internal project management platform, delivering features for task organization, progress tracking, and cross-team coordination to improve operational visibility.

Tech StackLaravel, React, PostgreSQL
Year2024
Attendance PWA (Haversine)

Designed and implemented a web-based online attendance application utilizing the Haversine Algorithm to calculate real-time distance-based user check-ins.

Tech StackJavaScript, PHP, MySQL
Year2024
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Let's craft the future together

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