Looking for a software engineer?

Welcome to all who visit here! I am Jong-Ha Ahn. This is a page for introducing my personal works. I need a purpose to make me go. I think this is the start of something really big. Sometimes that first step is the hardest one, and I've just taken it. Are you looking for a software engineer? I'm available for freelance work. Please contact me.


I love Latte, Mr. Latte is my personal brand.

Great brands aren't built on ads or promotions. I'm always stay humble. There is no room for arrogance. I have the courage to dream big and most importantly don't allow anyone to tell me or convince me that my dreams can't come true.


How can I improve myself and do better tomorrow than I did today?

This is one of my favorite quotes. Good is not good enough. I will do my best. And I always think about "What would you do if you knew you had less than a minute to live?". People who are unable to motivate themselves must be content with mediocrity, no matter how impressive their other talents. My answer is open the notepad and write codes that output "Everything is going to be okay.". I can handle the refactoring and write test of my code if there is a little more time.


Coffee Meeting

If you want to have a coffee meeting with me offline, please click on the button below and leave a message. I will contact you.


Get into my brain

나의 10일간의 프리랜서 적응기

01 Jan 2018

1일, 2016년 10월 오늘부터 내 경력에서는 처음으로 프리랜서에 도전한다. 원래... Continue reading

수학적 문제 해결방법

16 May 2017

과학자들이 문제를 해결하는 방법은 보통 가설로 세우고 이 가설을 증명하는... Continue reading

'미스터 노올'을 읽고 '맥스 캘라다'가 되어 아내에게 쓰는 편지

21 Dec 2015

나의 아내 보시오.샌프란시스코의 날씨는 어떻소? 지금 쯤 맑고 청아한 하늘을... Continue reading

인력관리에 대한 고민 (내가 만약 사장이라면...)

22 Jun 2015

Core Value품질“우리는 제품의 품질을 최우선으로 생각한다.”제품의 품질은 사용자의 만족도와 직결된다.... Continue reading


Keep Calm and Code On

UVa 11311 - Exclusively Edible

29 Jul 2019

Problem UVa 11311 - Exclusively Edible https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2286Solution400: Invalid request Continue reading

UVa 10034 - Freckles

29 Jul 2019

Problem UVa 10034 - Freckles https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=975Solution400: Invalid request Continue reading

CoordinatorLayout and AppBarLayout Always elevation in Android

22 Jun 2019

Problem안드로이드에서 CoordinatorLayout에 구현된 AppBarLayout의 경우 AppBarLayout가 축소되는 경우 그림자와 함께 elevation 효과가 적용되는데 디자인에 따라 확장된 상태에서도 elevation의 적용이 필요한... Continue reading

How to Allow Public Access to an Amazon S3 Bucket Automatically

14 Jun 2019

ProblemAmazon S3에서 모든 버킷에 public 으로 설정을 동일하게 적용하고 싶을 때 파일 업로드시 마다 매번 make public 을 실행하기는 불편하다.... Continue reading


Here's what I've done so far

This is a statement that encompasses my skills, abilities, professional expertise, and what makes me most suitable for the position. If you want to see more details, please click here.


Here's what I am studying now

Oracle Java SE subscription 이슈 정리

25 Nov 2018

Oracle은 2018 년 6 월 21일에 Java SE에 대한 유료... Continue reading

TWELVE SHATTERED MYTHS

11 Nov 2018

Myth 1: It takes a great idea to start a... Continue reading

안드로이드 APK 분석 방법

31 Jul 2018

ADBADB 파일 경로는 안드로이드 스튜디오를 설치하고 MAC 기준으로 /Users/[USERID]/Library/Android/sdk/platform-tools 에서... Continue reading

Go Ethereum 사용 법

27 Feb 2018

라이브러리 설치sudo apt-get install -y build-essential libgmp3-dev golang git treeGethGeth는... Continue reading