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Filip S.

Filip S.

Mobile App Developer

Mobile Developer with 4+ years of experience building production-ready applications for both iOS and Android using Flutter. I've worked on projects ranging from healthcare and business management platforms to e-commerce solutions, taking products from initial idea to release and ongoing maintenance. My experience includes developing responsive mobile applications, integrating REST APIs, implementing authentication and user management, handling push notifications, and creating scalable architectures that are easy to maintain and extend. I’m comfortable working with technologies such as Flutter, Firebase, AWS Cognito, Spring Boot, and various third-party integrations. Beyond client work, I’ve also built and maintained my own products, which has given me a strong understanding of both the technical and business side of software development. I focus on writing clean, maintainable code, communicating clearly throughout the project, and delivering solutions that provide real value to end users. If you're looking for a developer who can take ownership of a mobile project and help turn an idea into a polished product, I'd be happy to discuss your project.

🇧🇦Banja Luka, Bosnia and Herzegovina$20/hr100% JSSSince Oct 2025

Earnings and projects

MRR
$578

Last 6 months ÷ 2, the fewest it counts (since Sep 2026)

World#71,899 / 412k
🇧🇦Country#154 / 903
Revenue, last 30 days
—

Read daily since Oct 22, under 30 days

Total earnings
$1.2k

Billed in all: $1.2k

World#380,758 / 412k
🇧🇦Country#847 / 903
Per project
$585

$578 in the last 6 months

World#168,427 / 412k
🇧🇦Country#391 / 903
Projects, last 6 months
2
50% fixed50% hourly
World#88,918 / 412k
🇧🇦Country#153 / 903
Projects in all
2
50% fixed50% hourly
World#328,886 / 412k
🇧🇦Country#759 / 903

Earnings, last 30 days

$1.2k+$79 earned since Oct 22Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$1,100$1,150$1,200$1,250Oct 22Oct 30Nov 7

Tracked from Oct 22, 2026.

Skill rankings: Top 13% in Java

Ranked by MRR among everyone on Upwork with the skill.

  1. #104Unit Testing669 freelancers · 🇧🇦 #1Top 16%
  2. #369Dart2,324 freelancers · 🇧🇦 #3Top 16%
  3. #620CI/CD3,691 freelancers · 🇧🇦 #3Top 17%
  4. #669iOS3,908 freelancers · 🇧🇦 #4Top 17%
  5. #743Android4,975 freelancers · 🇧🇦 #4Top 15%
  6. #810Git5,766 freelancers · 🇧🇦 #3Top 14%
  7. #1,095Java8,313 freelancers · 🇧🇦 #8Top 13%
  8. #1,110Firebase6,978 freelancers · 🇧🇦 #6Top 16%