Python
92/100Backbone of my work — used daily for backend services, scripts, and tooling.
2026
Available · Đà Nẵng, VN
👋introducing
Phạm
Kỷ Nguyên.
💼Software Development Engineer🏢Workday Việt Nam
I build backend systems and developer tools. Previously 4 years at Paradox, including a stint in Scottsdale, Arizona. Currently based in Đà Nẵng, Việt Nam.
↳ scroll for the long versionpage 01 / 06
01 / apps
Everything running here.
live10Swipe →
One small VPS in Singapore, one engineer. Every app below was designed, built and is still operated by me — from the interface down to the database and the deploy.
01Writing & diaries3
Things I write for myself first, and publish anyway.
Lattice
Essays on technology, science and the examined life — in English and Vietnamese. No feed, no algorithm.
Cà Phê Diary
Every café in Đà Nẵng I have actually sat in, reviewed one at a time — space, drinks, price, Wi-Fi.
Quotes
A personal archive of quotes worth keeping, with a clean reader.
02Tools & products5
Free to use, straight from the browser.
Lumi
A ChatGPT-style assistant that streams its answers. Five free turns, no sign-in.
Tools
42 free online tools — converters, generators, formatters. No account, nothing stored.
Wiki
A small encyclopedia fed live by free public APIs — Wikipedia, art, books, space, weather and more.
World Cup 2026
Spain, world champions 2026 — the farewell page of what was a live fixtures-and-scores hub. See you in 2030.
MCP server
A Model Context Protocol server with its own OAuth 2.1 authorization server, built for Claude custom connectors.
03Games3
Built from scratch on a 2D canvas. No install, no account.
Arena
A 2D fighting game with procedural pixel fighters. Two players on one keyboard, or you against the AI.
GM — Esports Manager
Coach a League of Legends roster: sign players, run the ban-pick, survive a season. All 173 champions.
Citadel
A hand-drawn tower defense in the Kingdom Rush mould — 38 stages, 8 endgame turrets, 8 bosses.
02 / blog
All posts on Lattice→Latest writing.
Verschlimmbesserung: When Software Updates Make Things Worse
Why modern software updates keep breaking good features and cramming unwanted AI tools, and how we can regain control of our digital tools.
Stop Guessing Connection Pool Size: Fix DB Bottlenecks
Learn why oversized database connection pools ruin performance, and how to calculate the optimal pool size for high-throughput microservices.
Small Models Have Arrived: The Engine of Consumer AI
Frontier models get the headlines, but hyper-efficient small models are fixing unit economics and driving real-world AI software adoption.
Building reliable systems,
one merge at a time.
Born and raised in Đà Nẵng, Việt Nam. Started my career as an Engineer Intern at Paradox in late 2021, learning Python and Django from the ground up.
After nearly four years at Paradox — including a two-month assignment in Scottsdale, Arizona — Paradox was acquired by Workday in 2026, and I'm now part of the Workday team as a Software Development Engineer.
“Make it correct. Then make it fast.
”
Then leave it better than you found it.
— KN, committed @
04 / experience
Where I've been.
chapters04
- 2026—Now
Software Development Engineer
CURRENTWorkday · Remote / Đà Nẵng
Workday — one of the largest HCM platforms — acquired Paradox in 2026. I'm now part of the Workday team, continuing to build on what we shipped before.
- 2022—2026
Software Engineer
Paradox · Đà Nẵng
Nearly 4 years building HR automation tooling in the Đà Nẵng office. Grew from junior to middle — owning Django services, SQL pipelines, and integration work.
ONSITEScottsdale, ArizonaAug–Sep 2025 · 2 monthsEmbedded with the US team in person — broadened my engineering toolbox and shipped alongside them.
- 2021—2022
Engineer Intern
Paradox · Đà Nẵng
First role. Five months on-site in Đà Nẵng. Worked on the Vue.js front-end and learned the codebase.
- 2018—2022
B.Sc., Computer Software Engineering
Duy Tan University · Đà Nẵng
Four years studying Computer Software Engineering. Graduated with 'Good' classification.
05 / skills
What I work with daily.
disciplines08
Django
88/100Production web framework. Ship APIs, admin interfaces, and dashboards with it.
API Development
90/100Designing REST and GraphQL APIs. Versioning, authentication, pagination, observability.
Integration
85/100Connecting third-party systems — payment, identity, analytics. Webhooks, retries, idempotency.
Algorithmic Thinking
83/100Profiling, optimizing, and reasoning about correctness under load.
AI Agents
78/100Building agentic systems with LLMs. Tool use, structured outputs, evaluation harnesses.
Database Software
87/100PostgreSQL, MySQL, Redis. Schema design, indexing, query tuning.
Code Testing
86/100Unit, integration, and end-to-end tests. Pytest, mocks, fixtures, CI gating, coverage.