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Serhii S.

Serhii S.

Senior Backend & Full Stack Developer | Django, React, AWS

I'm a Senior Backed & Full Stack Developer with 5+ years of hands-on experience in both web development and backend engineering. I build scalable APIs and responsive interfaces using Python (Django, FastAPI), JavaScript (React, Vue), PostgreSQL, Docker, and AWS. Whether I’m integrating third-party tools, setting up data pipelines, or creating admin dashboards — I write clean, testable code that solves real business problems. I've worked with startups and growing tech companies on products related to e-commerce, crypto, education, and enterprise automation. 🔹 Expert in backend logic, microservices, and RESTful APIs 🔹 Experienced in data processing, lightweight data science flows, and data entry handling for business logic 🔹 Focused on long-term, full-time engagements where I can take ownership and deliver value If you're looking for a reliable Python Full Stack Developer, backend developer, or web developer to help grow your product — let’s talk!

🇵🇱Krakow, Poland$35/hr40% JSS5.00 (7)Since Jan 2023

Earnings and projects

MRR
$1.7k

Last 6 months ÷ 6

World#28,188 / 412k
🇵🇱Country#278 / 2,852
Revenue, last 30 days
$0

Last 6 months: $10k

Total earnings
$116k

Billed in all: $126k

World#32,916 / 412k
🇵🇱Country#437 / 2,852
Per project
$15k

$5k in the last 6 months

World#9,712 / 412k
🇵🇱Country#155 / 2,852
Projects, last 6 months
2
0% fixed100% hourly
World#88,921 / 412k
🇵🇱Country#610 / 2,852
Projects in all
8
25% fixed75% hourly
World#223,562 / 412k
🇵🇱Country#1,666 / 2,852

Earnings, last 30 days

$126kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$122k$124k$126k$128kOct 8Oct 23Nov 7

Skill rankings: Top 7% in Flask

Ranked by MRR among everyone on Upwork with the skill.

  1. #161Flask2,438 freelancers · 🇵🇱 #4Top 7%
  2. #428Back-End Development4,183 freelancers · 🇵🇱 #7Top 10%
  3. #492Django5,931 freelancers · 🇵🇱 #7Top 8%
  4. #540FastAPI4,337 freelancers · 🇵🇱 #5Top 12%
  5. #703Vue.js8,267 freelancers · 🇵🇱 #19Top 9%
  6. #761Docker8,761 freelancers · 🇵🇱 #18Top 9%
  7. #863MongoDB10,865 freelancers · 🇵🇱 #8Top 8%
  8. #974React Native10,486 freelancers · 🇵🇱 #10Top 9%