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Valerii O.

@valonis

5.0
9
5.5
5.5
100%

Mobile, Web Development, Design

$25 USD / Hour
・
Flag of
Ukraine (4:05 PM)
・
Joined on August 10, 2020
$25 USD / Hour
・
I am a senior multi-skills engineer with a vast background in software development using many different languages and frameworks. My current primary technology stack: Mobile: Android - Kotlin, Java. Front-End: HTML5-CSS3-Javascript. Back-end: Firebase serverless solutions. Node.js Frameworks: KorGe. Design: Adobe XD. I will develop a quality and efficient Android or Web app, which will be bug-free and will use the most recent and stable frameworks/ libraries. Please, be assured that your project will be treated with high priority and attention, focusing on quality and outstanding design. Examples of published apps are present at the Google Play store.
Verifications
On time
100%
On budget
100%
Accept rate
100%
Repeat hire rate
29%
Freelancer Android Developers Ukraine
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Portfolio

Portfolio

9163898
Sticker Maker Android application, with ability to: - Ability to crop photos - Ability to add stickers - Ability to add Text - Smooth UI transition
Sticker Maker app
6904216
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
7844297
UX/UI design for FYREPlace application with detailed description of 15 screens, colors, original images.
UX/UI design of FYREPlace app
9163898
Sticker Maker Android application, with ability to: - Ability to crop photos - Ability to add stickers - Ability to add Text - Smooth UI transition
Sticker Maker app
6904216
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
Biological clock - track sleep and sync your day. Mobile application based on circadian rhythms theory, record and edit sleep time, calculate and analyze statistics and based on sleep science recommend bedtime - wake up. Intuitive design, data analysis charts and recommendations text builder, Room database, custom views, Notifications, options for selection location from list and automatic identification, integrated AdMob.
Bioclock app
7844297
UX/UI design for FYREPlace application with detailed description of 15 screens, colors, original images.
UX/UI design of FYREPlace app
Changes saved
5.0 · 9 Reviews
Reviews
S
Update Android app build dependencies • $25 USD
Valerii updated an old Android project for me. Excellent work and really fast and concise delivery - got a bit more than I even hoped for!
Mikko S.
@slmikko
•
Flag of
, Finland
•
4 years ago
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Android smartphone custom camera app • $1,450 AUD
Valerii is a trustworthy highly creative and experienced software developer. He has solved an utterly complicated signal photo detection problem that no one else was able to solve. His communication skills and dedication to the project are superb. My highest recommendations. We will definitely continue working with Valerii.
Nikolay L.
@nikolaylip
•
Flag of
Macquarie Park, Australia
•
4 years ago
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I need an Android app developer • $350 USD
Pleasure to work with him, will always offer the best solution for your need
Jie Wei G.
@gjweir9
•
Flag of
Sungai Petani, Malaysia
•
4 years ago
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H
android app • $20 CAD
The Real Deal. Good to work with
Tanveerpal O.
@hollywoodnorth76
•
Flag of
Montreal, Canada
•
4 years ago
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FUNuage ILE - Game, Milestone#1 • $300 USD
I am not just happy, I am excited about the project we are working on together.
George K.
@SwarmShepherd
•
Flag of
Sturgeon Bay, United States
•
4 years ago
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Experience
Full Stack Developer
Jan, 2019 - Present
•
6 years, 1 month
Self Employed
Jan, 2019 - Present
•
6 years, 1 month
Android Native and Web Developer. Core languages: Kotlin, Java, Javascript. Knowledge base: HTML5, CSS3, SQLite, REST API, Volley, JSON, Room database, multithreading/ coroutines, custom views, Androidx Jetpack, clean MVVM architecture etc. Back-end: Firebase serverless solutions. UX/UI design, Wireframing, svg, vector graphics.
Jan, 2019 - Present
•
6 years, 1 month
PMI
Apr, 2004 - Jan, 2019
•
14 years, 9 months
Manager Engineering department
Sep, 2011 - Jan, 2019
•
7 years, 4 months
projects management, technical industrial solutions, various engineering solutions
Manager production, quality assuarance
Apr, 2004 - Sep, 2011
•
7 years, 5 months
Managing production departments, establishing quality assuarance processes, ISO 9001:2000 standard compliance audits.
Apr, 2004 - Jan, 2019
•
14 years, 9 months
Process and Software Engineer/ Team Lead
Oct, 1999 - Apr, 2004
•
4 years, 5 months
Philip Morris Ukraine
Oct, 1999 - Apr, 2004
•
4 years, 5 months
Development of software for production planning, process improvements.
Oct, 1999 - Apr, 2004
•
4 years, 5 months
Education
National Aerospace University -'Kharkiv Aviation Institute'
1993 - 1999
•
6 years
Master of Science - Electronics and Software Engineering
Flag of
Ukraine
1993 - 1999
•
6 years
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