Book a Development & IT Consultation with Dmitriy C. | Upwork

Development & IT Consultation with Dmitriy C.

4.9 · 26 reviews

I can help you with:

🚀 Google Play launch:
Navigating the complex Data Safety forms, Privacy Policies, and Content Rating questionnaires to ensure a smooth approval. If you've been rejected, I can help identify the root cause and fix it.

🔍 High-level code review:
A deep dive into your codebase (Kotlin , Jetpack Compose , Java , XML) to identify performance bottlenecks, memory leaks, or architectural technical debt.

🗺️ Architecture & roadmap:
Defining the fastest path from idea to MVP. I’ll help you choose the right libraries and architecture (MVVM / MVI / Clean) to ensure your Android app can scale later.

💰 Accurate budgeting & timelines:
Creating realistic time and cost estimates so you can manage stakeholder expectations and avoid budget overruns.

⚡ MVP Optimization:
Suggestions on how to trim the "fat" from your project to get to market as quickly as possible without sacrificing code quality.

Get personalized advice on:

AI & Machine Learning AI Integration Ecommerce Development Mobile App Development User Testing android app development android kotlin firebase mobile app development

You’re covered with payment protection so you can cancel and get a full refund up to 24 hours before your consultation.

About Dmitriy

Android Developer | Native Android App Developer | Kotlin Developer

100% Job Success

4.9 (26 reviews)

Dnipro, Ukraine - 9:00 pm local time

I'm an Android Developer / Mobile Developer with 10 years of experience helping small businesses , startups and indie founders translate their vision into scalable, high-performance apps from 0 to launch using the latest technologies ( Kotlin , Coroutines , Jetpack Compose , Jetpack libraries , Kotlin Multiplatform for cross platform apps).

I specialize in:

- on-device AI integration using MediaPipe / TFLite / Google ML Kit ( Object detecton , Face detection , Pose detection , Text summarizing / OCR , text-to-speech , speech-to-text );
- video / media editing apps ( FFMpeg , AndroidX Media3 );
- building media , social , and productivity tools (not games);
- fixing app performance , memory leaks , crashes and ANRs , especially in complex or “vibe-coded” apps.

Mostly working with

🌟🌟🌟🌟🌟 Recent feedback :

"I was particularly impressed by his strong attention to detail - nothing was overlooked, and the quality of the work consistently met high standards. He showed real commitment to the project, staying engaged and proactive throughout the development process. His regularity and consistency in delivering work made collaboration smooth and reliable." - Neil

🚀 Also I've been building my own Android apps so that gives me a deep understanding of not only a technical part but also ASO and monetization strategy.

✅️ Recent large-scale projects:

---
PDF Maker & Reader (130k+ installs , 🌟4.6 on Google Play)
Role: Android Developer / Android App Developer / Kotlin Developer

I recently built this high-performance Android app from scratch based on Figma mockup using Kotlin.
It allows users to quickly convert images to PDF and edit existing PDFs using a fast, local-first architecture. The app has achieved 130k+ downloads and 8k monthly active users on Google Play, with the crash rate lower than 0.1%.
---

---
US Medical Education App (COMQUEST for COMLEX & COMAT Prep)
Role: Android Developer / Android App Developer / Mobile Developer

As part of an international team alongside iOS Developer and Web Developer, I built this Android app from scratch based on Figma designs for US medical students. Continue providing ongoing support for this project, ensuring the mobile app remains a stable and reliable tool for users.
---

---
US Automotive Video Suite app
Role: Android Developer / Android App Developer / Mobile Developer

In collaborating with an iOS Developer and a Full Stack Developer, I built two native Android apps from scratch as a clone of iOS apps (Dealer Video Inventory and Dealer Video Suite) that allows dealers to capture high-quality vehicle inventory videos and photos. These projects helps dealers increase sales through personalized video.
---

🌟 🌟🌟🌟🌟 "Dmitri is a pleasure to work with. He's Android programming skills are exceptional. He's always professional and easy to work with. He is very methodical in his approach. Which at times has resulted in delivery scheduling slipping a little but I rather have a good product than a hastily put together product. We're continuing to work with Dima for other projects." - Philip

Whether you are looking for a Mobile Developer to lead a new project or an Android Developer to optimize an existing Java / Kotlin codebase or optimize performance, my goal is to provide technical clarity and long-term stability.

As a team player for cross-platform projects I have a proven track record of working alongside iOS developers to ensure smooth releases.
I also have specific experience collaborating with Flutter Developers and Full Stack Developers to bridge the gap between cross-platform Flutter / React Native code and the system features specifically by developing custom Java / Kotlin modules to handle native Android OS functionality that standard Flutter plugins can't reach.

---
🚀 My core stack:

🔸️Languages: Java , Kotlin
🔸️UI: XML , Jetpack Compose
🔸️Architecture: MVVM , MVI , Clean Architecture
🔸️Native: Android SDK , Android Studio
🔸️Multiplatform: Kotlin Multiplatform ( KMM / KMP ) / Compose Multiplatform ( CMP )
🔸️Key features: Camera , Photo & Video capture and edit using FFMpeg , OpenGL , OpenCV ; GPS , Location , Chat , Background syncronization , WorkManager and foreground services, ofline-first approach, on-device AI / LLM , VPN / WireGuard , ExoPlayer / Media3
🔸️On-device AI integration : Video analysis , Image recognition , Object detection , Face detection , Pose Detection , Camera stream analysis , Text-to-Speech , Speech-to-Text ( MediaPipe / Google AI Edge , TensorFlow / TFLite , Google ML kit ).
🔸️Cloud AI integration : OpenAI , Gemini API

What to expect

Schedule the consultation

Choose from the freelancer’s available days and times.

Get advice for your custom needs

Share details about your project and what you want to talk about. The freelancer will review and reach out if they have questions.

Join the Zoom meeting

1-on-1 meeting with the freelancer to discuss your needs and project.

Approve the work

The freelancer will finish up the documents you asked for and send them to you for approval:

Before the consultation

Here’s what Dmitriy will need to know before you meet

Tell me a bit about yourself and what would you like to talk about

(26)

5 stars

96% Complete

(25)

4 stars

4% Complete

(1)

3 stars

1% Complete

(0)

2 stars

1% Complete

(0)

1 star

1% Complete

(0)

Help with MediaPipe on an Android device Dmitriy was fantastic to work with, and I really appreciate all the hard work he put into my project. I was very new to the Android landscape, and he not only helped me work through the initial problem I was stuck on, but also guided me through the proper release process and several Play Store issues I was having.

As an iOS developer by trade, I had a knowledge gap when it came to Android, and Dmitriy did a great job bridging that gap. He reviewed the work I was doing, suggested improvements, and helped me make better decisions for the platform. I would highly recommend Dmitriy to anyone who needs help with Android development.

The main reason I hired Dmitriy was to help with some problems I was having with MediaPose, and he handled them extremely well. He made quick implementations, took my feedback seriously, and iterated promptly based on that feedback. He suggested different possible solutions and implemented the approach I felt was best.

Dmitriy also went through the codebase and application more broadly, suggested quality improvements, and implemented them. I was very happy working with him and would not hesitate to rehire him if I need more Android work in the future.

Image to PDF android app I had a great experience working with Dmitriy on an hourly contract.

I was particularly impressed by his strong attention to detail — nothing was overlooked, and the quality of the work consistently met high standards. He showed real commitment to the project, staying engaged and proactive throughout the development process. His regularity and consistency in delivering work made collaboration smooth and reliable.

Overall, Dmitriy is a dependable and skilled developer, and I would definitely recommend him.

Android Engineer for Top App

Android App for AI Text Summary Dmitriy did an outstanding job on this project. The quality of his work exceeded my expectations, and he delivered everything on time. Communication was clear and responsive throughout, and he was receptive to feedback and revisions.

Android App Development for PDF or Text Summarization using a specific Ai Model Great working with Dmitriy, he is quick to deliver and communicates very well. Will definitely work with him again.