Top Asynchronous I/O freelancers

38 freelancers list Asynchronous I/O on Upwork.

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Showing 38 of 38Data updated Nov 7

# Freelancer		SinceMember since
Rajnish P. 🇮🇳🇮🇳 Quantitative Developer \| Algorithmic Trading \| Agentic AI	$7k↑ 1%	Mar 2020Mar 30, 2020
Artem K. 🇷🇸🇷🇸 Senior Full-Stack Engineer \| TypeScript, Next.js, Python, AWS & GCP	$7k↑ 1%	Aug 2016Aug 9, 2016
Jameson W. 🇺🇸🇺🇸 Data Intelligence Architect, Solutions Consultant \| AI/ML, ETL	$5k↑ 19%	Apr 2019Apr 16, 2019
4 Rickson G. 🇧🇷🇧🇷 Senior Full-Stack Engineer & Architect \| Python, Elixir, Go, AI	$3k↓ 8%	Sep 2021Sep 27, 2021
5 Vladislav D. 🇹🇷🇹🇷 Software Developer	$2k↓ 35%	Oct 2018Oct 23, 2018
6 Safiullah K. 🇵🇰🇵🇰 Senior AI Engineer \| FastAPI, RAG & LangGraph Multi-Agent Systems	$1k↓ 31%	Jan 2021Jan 14, 2021
7 Serhii M. 🇺🇦🇺🇦 FastAPI Backend Engineer \| Payments & Fintech APIs	$939↑ 21%	Dec 2024Dec 8, 2024
8 Ziad S. 🇪🇬🇪🇬 AI & Machine Learning Engineer.	$273↑ 16%	Sep 2025Sep 9, 2025
9 Paul A. 🇳🇬🇳🇬 Backend Developer \| Technical Writer	$138↓ 63%	Jul 2022Jul 31, 2022
10 HONG THAI T. 🇻🇳🇻🇳 Senior Mobile Developer \| Flutter + Swift / SwiftUI	$115↓ 1%	Jul 2022Jul 10, 2022

Freelancer	MRR	Member since
11 Minhajul I. 🇧🇩🇧🇩 Senior Python Developer \| 8+ Years Experience \| 100K+ Earned on Upwork	$63↓ 24%	Feb 2019Feb 2, 2019
12 Anass A. 🇲🇦🇲🇦 Python Backend Engineer \| FastAPI, Playwright & Clean Architecture	$42↓ 3%	Aug 2025Aug 12, 2025
13 Adrian Ilie O. 🇷🇴Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇷🇴 Quant Developer \| Automated Trading Systems & Infrastructure	≈$37–	Nov 2021Nov 17, 2021
14 Sharadchandra J. 🇮🇳🇮🇳 Python developer \| Django, Flask \| PostgreSQL MySQL Redis \| Async	$0–	Oct 2024Oct 29, 2024
15 Anton P. 🇲🇪🇲🇪 Senior Python Backend Engineer \| FastAPI, AI & SaaS	$0–	May 2013May 27, 2013
16 Arjun K. 🇮🇳🇮🇳 Python/AI Engineer \| Django, NLP, RAG, FastAPI, GCP/AWS	$0↓ 100%	Nov 2014Nov 24, 2014
17 Denys H. 🇺🇦🇺🇦 Senior Python Backend Engineer \| FastAPI, APIs, Distributed Systems	$0–	Jul 2012Jul 31, 2012
18 Max F. 🇱🇻🇱🇻 Senior C++ Engineer \| Linux \| Networking \| Distributed Systems	$0–	Jan 2015Jan 13, 2015
19 Fred Newton A. 🇩🇪🇩🇪 Unity Developer - Game & Mixed Reality Development	$0–	May 2025May 2, 2025
20 Denis I. 🇹🇭🇹🇭 Full stack developer	$0–	Feb 2015Feb 17, 2015

Freelancer	MRR	Member since
21 Bill F. 🇺🇸🇺🇸 Your IT Swiss Army Knife. Experienced leader, developer and devops pro	$0–	Jan 2024Jan 25, 2024
22 Anton S. 🇺🇦🇺🇦 Web Scraping \| Python Engineer \| Anti-Bot Engineer	$0–	May 2017May 3, 2017
23 Alexandru-Gabriel I. 🇷🇴🇷🇴 Software Developer \| C, C++, Rust, Python	$0–	Aug 2022Aug 26, 2022
24 Mariana K. 🇺🇦🇺🇦 Python \| Django \| Flask \| FastAPI	$0–	Aug 2019Aug 20, 2019
25 Amran H. 🇧🇩🇧🇩 Java-Spring-Microservices-Kafka-AgenticAI- Backend Developer	$0–	Feb 2020Feb 6, 2020
26 Daryl R. 🇵🇭🇵🇭 Python / Web Scraping & Automation Expert/ Data Scraper	$0–	Oct 2023Oct 5, 2023
27 Samuel L. 🇳🇬🇳🇬 Python Backend Engineer \| Django, FastAPI & API Integrations	$0–	Dec 2023Dec 13, 2023
28 Renford A. 🇺🇸🇺🇸 Python Developer \| Trading Systems, Market Data, Broker APIs	$0–	Mar 2024Mar 24, 2024
29 Teodor C. 🇷🇴🇷🇴 Professional Web Scraping \| Browser Extensions \| Software Engineer	$0–	Feb 2017Feb 20, 2017
30 Ahmad E. 🇸🇪Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Apr 14, 2026.🇸🇪 Senior Full-Stack & Rust, Golang Developer \| CTO \| DevOps Engineer	≈$0–	Aug 2021Aug 4, 2021

Freelancer	MRR	Member since
31 Michail P. 🇬🇷Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇬🇷 Senior Backend Engineer (Python) \| Django \| AWS & Scalable Systems	≈$0–	Feb 2012Feb 22, 2012
32 Jaya S. 🇮🇳Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇮🇳 Expert .NET Full Stack Developer	≈$0–	Jan 2012Jan 28, 2012
33 Konstantin S. 🇰🇬Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇰🇬 Senior Python Backend Engineer \| Django FastAPI AWS LLM Integration	≈$0–	Feb 2021Feb 22, 2021
34 Andrii S. 🇺🇦Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇺🇦 FULLSTACK \| Python \| JavaScript \| Web \| Telegram Bots \| AI Automation	≈$0–	Mar 2024Mar 4, 2024
35 Juris K. 🇱🇻Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇱🇻 Backend developer	≈$0–	Jul 2020Jul 19, 2020
36 Vlad S. 🇩🇪Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇩🇪 Senior Python Automation Engineer \| Scraping, Bots, Anti-Bot Bypass	≈$0–	Jan 2019Jan 17, 2019
37 Stanislav K. 🇬🇪Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇬🇪 Senior Kotlin/Java Android Developer	≈$0–	Nov 2014Nov 1, 2014
38 Jingchun L. 🇨🇳Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇨🇳 Founding Engineer \| AI Systems, Infrastructure, Data, Web Scraping	≈$0–	Apr 2025Apr 9, 2025

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