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Kosha S.
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Kosha S.

Senior iOS & Android Developer | AI/ML, LLMs, IoT

✅ 100% Job Success Rate | 🏆 Top Rated Developer | 🏆 10+ Years of Experience I am a Senior Mobile Application Engineer with over 10 years of experience in iOS (iPhone & iPad) and 7+ years in Android development, delivering enterprise-grade and utility applications used by thousands of users worldwide. I specialize in building scalable, secure, and high-performance mobile apps for industries such as Healthcare, Logistics, Automotive, and Social Media. 📱 Mobile App Development Native iOS (Swift / SwiftUI) & Android (Kotlin) High-traffic, production-ready apps Long-term app updates & maintenance 🌐 IoT & Hardware Integrations BLE & Wi-Fi-enabled applications Arduino & custom hardware integrations Real-time device communication & monitoring 🧠 AI / ML Capabilities I have hands-on experience integrating AI/ML capabilities into mobile and web applications, including: ✔️ LLM Integrations – GPT-4, Claude, Gemini, LLaMA (OpenAI SDK, AWS Bedrock) ✔️ AI-Powered Workflows – Agentic bots, automation & AI assistants ✔️ Speech & Vision AI – Whisper STT, OCR, image recognition ✔️ RAG Pipelines & Custom APIs – LangChain, LlamaIndex, Vector Databases ✔️ Voice Assistants & Chatbots – NLP-based conversational systems I work with a dedicated team of UI/UX designers, backend/API engineers, and PHP, Node.js, and Python developers, enabling end-to-end product delivery. 📩 Let’s connect and discuss how I can help bring your app idea to life.

🇮🇳Ahmedabad, India$25/hr100% JSS4.66 (16)Since Mar 2014
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Earnings and projects

MRR
$964

Last 6 months ÷ 6

World#49,923 / 412k
🇮🇳Country#5,482 / 45.9k
Revenue, last 30 days
$0

Last 6 months: $5.8k

Total earnings
$187k

Billed in all: $188k

World#17,039 / 412k
🇮🇳Country#2,781 / 45.9k
Per project
$8.5k

$5.8k in the last 6 months

World#19,491 / 412k
🇮🇳Country#2,064 / 45.9k
Projects, last 6 months
1
100% fixed0% hourly
World#128,092 / 412k
🇮🇳Country#14,379 / 45.9k
Projects in all
22

Across 29 contracts

34% fixed66% hourly
World#124,452 / 412k
🇮🇳Country#18,135 / 45.9k

Earnings, last 30 days

$188kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$186k$188k$190k$192kOct 8Oct 23Nov 7

Skill rankings: Top 8% in iPhone UI Design

Ranked by MRR among everyone on Upwork with the skill.

  1. #12iPad UI Design130 freelancers · 🇮🇳 #3Top 9%
  2. #51iPhone UI Design622 freelancers · 🇮🇳 #17Top 8%
  3. #76iPad App Development446 freelancers · 🇮🇳 #32Top 17%
  4. #841Android App Development6,395 freelancers · 🇮🇳 #265Top 13%
  5. #932iOS Development6,533 freelancers · 🇮🇳 #289Top 14%
  6. #1,021API Development6,848 freelancers · 🇮🇳 #288Top 15%
  7. #1,387HTML514,581 freelancers · 🇮🇳 #328Top 10%
  8. #2,700PHP24,835 freelancers · 🇮🇳 #800Top 11%