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Andrej V.

Andrej V.

QA engineer

I create innovative mobile and software solutions that enhance user experiences and streamline processes. With proven experience in developing Kotlin-based Android apps using Jetpack Compose and MVI architecture, I bring projects like Catalist to life, featuring interactive elements and external API integrations. My skills extend to Python and CUDA, where I implemented advanced parallel image processing systems with multithreading and multiprocessing. I specialize in building reusable libraries for report generation and designing microservices with robust authentication and asynchronous notifications. In addition, I have practical experience in software testing and quality assurance, including unit, integration, and end-to-end testing, applying both white-box and black-box techniques to ensure reliability and high code quality. If you’re seeking a developer who combines technical expertise with a strong focus on quality and user-centered design, let’s discuss how I can contribute to your next project.

🇷🇸Belgrade, Serbia$20/hr40% JSSSince Mar 2026

Earnings and projects

MRR
$1.2k

Last 6 months ÷ 6

World#39,343 / 412k
🇷🇸Country#399 / 4,015
Revenue, last 30 days
$1.2k

Last 6 months: $7.5k

World#35,395 / 412k
🇷🇸Country#383 / 4,015
Total earnings
$9.7k

Billed in all: $11k

World#199,097 / 412k
🇷🇸Country#2,363 / 4,015
Per project
$9.7k

$7.5k in the last 6 months

World#16,538 / 412k
🇷🇸Country#186 / 4,015
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇷🇸Country#1,119 / 4,015
Projects in all
1
0% fixed100% hourly
World#360,671 / 412k
🇷🇸Country#3,690 / 4,015

Earnings, last 30 days

$10.7k+$1.2k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$9k$10k$11kOct 8Oct 23Nov 7

Skill rankings: #1 in 1 skill of 15

Rarest: top 11% in Kotlin, of 3,021. Ranked by MRR among everyone on Upwork with the skill.

  1. 1Image Processing Framework7 freelancers · 🇷🇸 #1Top 14%
  2. 2Image Processing Software16 freelancers · 🇷🇸 #1Top 13%
  3. #8Computer Vision Software51 freelancers · 🇷🇸 #1Top 16%
  4. #11App Feature Development66 freelancers · 🇷🇸 #1Top 17%
  5. #88QA Engineering580 freelancers · 🇷🇸 #3Top 15%
  6. #95Native App Development833 freelancers · 🇷🇸 #2Top 11%
  7. #305Computer Vision2,498 freelancers · 🇷🇸 #4Top 12%
  8. #320Kotlin3,021 freelancers · 🇷🇸 #6Top 11%