Open to opportunities

Esa Rizki Hari Utama

@esarizkihariutama

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Problem solver and fullstack developer building scalable apps with cloud-first practices.

Indonesia

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What I'm looking for

I seek roles where I can build scalable, high-performance apps, lead technical work, work with cloud services and CI/CD, and grow while contributing to product stability and user experience.

I am a problem solver and fullstack developer with experience building and maintaining scalable web and mobile applications using Laravel, Flutter, Nuxt/Next, and modern JS frameworks. I have delivered end-to-end projects for clients, reduced crash rates and improved performance for large user bases, and managed CI/CD, dependency maintenance, and integrations with analytics and messaging platforms.

I have led cross-platform app development for a community product serving 20K+ Android and 4K+ iOS users, taught Islamic Astronomy (Ilmu Falak) online, and contributed to multiple production systems as a freelancer and software engineer. I prioritize performance, stability, and scalable architecture while continuously learning and contributing to community and educational initiatives.

Experience

Work history, roles, and key accomplishments

Current

Lecturer of Islamic Astronomy

Current

STAI Adzkiya eMHa

Mar 2025 - Present (10 months)

Taught Islamic Astronomy (Ilmu Falak) through weekly online sessions, covering prayer time calculations, Qibla direction, ijtima’, and eclipse analysis using various hisab methods.

Ilmu Falak Qibla Determination Hisab Methods Eclipse Analysis

Current

Lead Apps Developer

Current

PT Aplikasi Kota Pintar

Apr 2021 - Present (4 years 9 months)

Led development and maintenance of the OneSmile cross-platform app (20K+ Android, 4K+ iOS), reduced crash rates significantly, delivered 15+ modules, and implemented CI/CD and analytics integrations.

Flutter BLoC Provider Mixpanel Appsflyer Performance Optimization

Current

Freelance Software Engineer

Current

Freelancer

Aug 2019 - Present (6 years 5 months)

Managed technical support, bug fixing, and feature development for 10+ client web applications across Laravel, Nuxt, and Vue stacks, delivering stable production releases and new features like a redeem point system.

Laravel Vue.Js Nuxt.Js PHP JavaScript REST APIs

Software Engineer

PT Altomatik Teknologi Indonesia

Dec 2019 - Mar 2021 (1 year 3 months)

Provided maintenance and feature development for 4+ client websites using PHP stacks (Yii2, native PHP), modernized UIs, and implemented frontend enhancements that improved site functionality and stability.

PHP Bootstrap HTML JavaScript Frontend Slicing

Education

Degrees, certifications, and relevant coursework

STMIK Raharja

Bachelor of Software Engineering, Software Engineering

2015 - 2019

Grade: 3.57/4.00

Activities and societies: 2nd Place Winner (2019) at Raharja Career Exhibition; involved in research on Expert Systems & Business Intelligence; organizational involvement with Nahdlatul Ulama (later roles).

Completed a Bachelor of Software Engineering with focus on software development and research in expert systems and business intelligence, graduating with a 3.57/4.00 GPA and earning 2nd place at the Raharja Career Exhibition 2019.