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About Muhammad Luthfi Juliansyah
Software Engineer · Fullstack Engineer · Ruby on Rails Developer. Based in Bandung, Indonesia.
I build and maintain web applications, from the interface to backend architecture and system integrations. My experience spans Ruby on Rails, PHP Lumen, React, and Svelte.
I started by building a website and sales features at SIS Pottery. At Halalin, I contributed to Company Profile, Academy, Identity, Backoffice, and Payment Gateway. Now at PT Sinergi Informatika Semen Indonesia, I work on procurement applications for PT Dahana and PT Antam. I also build Deepcall, a phone-based conversation platform, using Rails and Svelte through Inertia.js.
Projects and work experience
Deepcall
Personal project · Phone-based conversation platform
Bandung, Indonesia · June 2026 - Present
Connects people with suitable conversation partners to share stories, exchange ideas, and find support. It offers everyday conversations and semi-professional sessions matched to relevant backgrounds and expertise, including study companionship and initial consultations. I built it with Rails and Svelte through Inertia.js, connected PostgreSQL on Supabase, deployed on AWS EC2, and configured Cloudflare R2 for object storage.
Ruby on Rails, Svelte, Inertia.js, PostgreSQL, Supabase, AWS EC2, Cloudflare R2
Visit Deepcall
PT Dahana & PT Antam procurement
Work experience · Fullstack Engineer
PT Sinergi Informatika Semen Indonesia · November 2025 - Present
Contributed to two procurement applications using React and PHP Lumen. Worked on cross-module workflows, business logic, SAP integrations, and two PostgreSQL databases. Investigated production issues and refactored code to support application stability.
React, PHP Lumen, PostgreSQL, SAP
Company website
Halalin application ecosystem
Work experience · Junior Software Engineer
PT Halal Digital International · November 2023 - April 2025
Developed and maintained Rails-based Company Profile, Academy, Identity, Backoffice, and Payment Gateway applications. Contributed product search, exam systems, API integrations, real-time features, pull request reviews, and database design and optimization with the team lead.
Ruby on Rails, API integrations, Database design
Company website
SIS Pottery website & sales
Work experience · Fullstack Internship
SIS Pottery · February 2022 - August 2022
Built a company profile website from scratch with Ruby on Rails, handling frontend and backend development. Implemented sales features and basic transaction flows, then deployed the applications to production.
Ruby on Rails, Fullstack, Deployment
Skills
Backend & integrations
Ruby, Ruby on Rails, PHP, Laravel, Lumen, API & SAP integrations
Frontend
JavaScript, React, Svelte, Inertia.js, Next.js, Nuxt.js
Data & code quality
PostgreSQL, Supabase, Postman, DBeaver, Pull request reviews, Debugging & refactoring, Database optimization
Deployment & storage
AWS EC2, Cloudflare R2
Languages
Indonesian · Native speaker, English · Intermediate
Education
Widyatama University
Informatics · 2019 - 2023 · Bandung
GPA 3.46. During my studies, I also completed a fullstack internship at SIS Pottery from February to August 2022.
Contact