Backend Engineer
PT Hes Cipta Kreasi · On-site · Full-time
Building and maintaining backend services in TypeScript with MongoDB. Designing scalable APIs and contributing to production infrastructure.
#typescript#mongodb#backend#api-design
Available for hire — Q2 2026 Indonesia · UTC+7
Denisetiya (Deni Setiya) — Backend Engineer from Indonesia.
// shipping
Qwe — uWS.js framework ⚡
// daily driver
Arch BTW · TypeScript
I'm Denisetiya (Deni Setiya) — a passionate Backend Engineer who occasionally crosses into Fullstack territory. I build robust APIs, ship open-source libraries to the community, and live in the terminal. Strong background in DevOps, Linux as my daily driver, and a deep love for type-safe TypeScript.
✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷
✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷✱✺✦✷
01 — About
Backend.
Backend.
Library Maker.
Linux native.
I'm Denisetiya — a Backend Engineer who occasionally slips into Fullstack. I ship scalable APIs, build libraries for the community, and run Linux as my daily driver.
Comfortable with API gateways (Nginx, Traefik, Kong), deeply invested in TypeScript, and slowly going deeper into Go and Rust for systems work.
11+
OSS projects
TS
Core stack
🐧
Linux native
∞
curl requests
~/now
Updated this week - Building Qwe — uWebSockets.js REST framework
- Mastering Advanced TypeScript patterns & DX
- Exploring Go & Rust for systems programming
- Optimizing Node.js & Bun for large-scale apps
Ship fast
Done > perfect
Ship safe
Tests & types
Ship joy
Polish details
02 — Selected Work
All projects
Things I've shipped .
A curated slice of recent work. Each project has its own war stories — ask me.
01
Creator
★
2024
Qwe Framework
High-performance REST API framework powered by uWebSockets.js. Minimal deps, maximum throughput.
TypeScript uWebSockets Node.js
View on GitHub
02
Library Author
★
2024
Valdix
TypeScript validation library with built-in i18n (ID, JP, EN). Zod-like API, tuned for speed.
TypeScript i18n Zero-deps
View on GitHub
03
Creator
★
2025
Security Tester
Developer-first security validation CLI for API, web, and domain audits. CI/CD-ready outputs: Console, JSON, HTML, SARIF, JUnit. Non-destructive payloads, scope allowlists, redacted reports.
CLI Security CI/CD SARIF
View on GitHub
04
Fullstack
2024
Ulu Coffee
Sistem manajemen restoran modern — online ordering, cart, Midtrans payments, admin dashboard. Built on Laravel 12.
Laravel PHP Tailwind Alpine.js Midtrans
View on GitHub
05
Author
2024
Nginx API Gateway
Reusable, production-ready Nginx API Gateway. Auto SSL (Let's Encrypt), per-IP rate limiting, easy service registration, full Docker Compose setup.
Nginx Docker Let's Encrypt
View on GitHub
06
Creator
2024
GitHub Stats Cards
Dynamic SVG cards for GitHub profile stats. Public hosted API — no token, no Vercel needed. Responsive all-in-one card.
SVG Vercel TypeScript
View on GitHub
07
Backend Engineer
2024
Medisense API
Modern healthcare backend: symptom analysis, medication recs, disease lookup, drug interaction checks.
Node.js TypeScript MongoDB
View on GitHub
08
Fullstack
2024
Single Store API
Robust e-commerce backend. Express, TypeScript, MongoDB, Prisma, Zod — full type safety end-to-end.
Express TypeScript Prisma MongoDB
View on GitHub
09
Author
2024
Golang RESTful API
Comprehensive Go REST API w/ clean architecture, validation, JWT auth, MongoDB. Production-ready template.
Go MongoDB JWT
View on GitHub
10
Creator
2024
Markdown Editor
Modern feature-rich Markdown editor. Real-time preview, syntax highlighting, advanced formatting tools.
React TypeScript Tailwind
View on GitHub
11
Library Author
2024
Animate On View
Lightweight scroll-animation library for React & SSR frameworks. Customizable, tiny footprint.
React TypeScript SSR
View on GitHub
★☆✦✧★☆✦✧★☆✦✧★☆✦✧★☆✦✧★☆✦✧
★☆✦✧★☆✦✧★☆✦✧★☆✦✧★☆✦✧★☆✦✧
03 — Tech Stack
The tools I trust.
Picked for outcomes, not hype. Not married to any of these — but they've earned their place.
TypeScript
JavaScript
PHP
Go
Rust
Python
C++
Express
NestJS
Hono
Laravel
Django
Node.js
Bun
React
Svelte
Tailwind
Alpine.js
PostgreSQL
MongoDB
MySQL
Firebase
Linux
Docker
Nginx
Traefik
Kong
Git
VS Code
Postman
04 — Process
How I work .
Less of a methodology, more of a default. Adapts to the project, never the other way around.
01
Discover
We dig into the problem before the solution. Users, constraints, success metrics — all on the table.
02
Design
Prototype the architecture. Sketch the API. Walk through edge cases. Cheap to change, costly to skip.
03
Build
Ship in thin slices. Tested, observable, reversible. Every PR is a small bet you can win or unwind.
04
Polish
Performance pass, copy pass, accessibility pass. Details are the difference between OK and remarkable.
→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢
→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢→↗↘⇢
05 — Experience
The journey so far.
- 05Mar 2025 — Present
- 04Jun 2024 — Mar 2025
Full Stack Developer · Internship
UIN Raden Intan Lampung · Sukarame, Lampung · HybridBuilt full-stack web applications using Django and MySQL. Owned features end-to-end from database schema to frontend implementation.
#django#mysql#python#fullstack - 03Jan 2023 — Mar 2025
Web Developer
Freelance · Remote · FreelanceDelivered web projects for diverse clients using React.js and Express.js. Handled scoping, implementation, deployment, and post-launch support.
#react#express#node.js#freelance - 02Feb 2024 — Jun 2024
Advance Programming Practicum Assistant
UIN Raden Intan Lampung · Bandar Lampung · Part-time · On-siteAssisted faculty in teaching advanced programming concepts in Python. Guided students through practicum sessions, code reviews, and problem-solving.
#python#teaching#mentoring - 012023 — Present
Library Author & Maintainer
Open Source · github.com/denisetiyaShipping libraries for the community — Valdix (validation), Qwe (web framework), Animate On View (React). Focus on type safety, performance, and minimal dependencies.
#typescript#open-source#library-design
06 — Testimonials
Kind words .
Cherry-picked from past collaborators, clients, and teammates.
"Code is read more than written. I try to make every line carry meaning — and reserve prose for the things prose alone can express."
D
Denisetiya
On craft
"A good library is one you forget you depend on. The bad ones interrupt your day."
D
Denisetiya
On library design
"Linux on the desktop isn't a meme. It's a feedback loop where every layer is inspectable. That's the addiction."
D
Denisetiya
On daily drivers
+×✕✦+×✕✦+×✕✦+×✕✦+×✕✦+×✕✦
+×✕✦+×✕✦+×✕✦+×✕✦+×✕✦+×✕✦
07 — Writing
All posts
From the blog .
01
#backend#api-design
The idempotency key: a small string that prevents catastrophic bugs
Why your API needs idempotency keys, what they actually buy you, and how to implement one without creating a new class of footguns.
02
#performance#engineering
Latency budgets are a love letter to your users
How thinking in milliseconds-per-feature reshaped how I design APIs and UIs.
03
#craft#code-style
Why I stopped writing comments
A controversial take on code documentation and what to write instead.
08 — Contact
Let's build
Let's build
something
good .
Got a product idea, a tricky technical problem, or just want to chat about distributed systems? My inbox is open.