Skip to content
BackNov 7
Kostiantyn P.
Upwork badge

Kostiantyn P.

Expert Fullstack developer AI developer | Next.js | Express | React.js

React frontend full stack developer 12 years of experience in full stack development, AI development , complex web applications. React React.js | Next Next.js | Express Express.js | Node.js Node | JavaScript Js | AI developer , pipecat , RTVI , voice assistant , Stripe ✅ Generic Software Development Expertise 🔹 AI dailybots , pipecat , RTVI 🔹 Development of complex web applications 🔹 API development of for iPhone, Android, React apps. 🔹 Development of admin panel , dashboards , CRM , CMS 🔹 Website development ✅ Languages Frameworks 🔹 Python ( Django ) 🔹 JavaScript ( React JS Next.js Node.js Express ) ✅ Databases 🔹 MySQL 🔹 Redis 🔹 MongoDB 🔹 PostgreSQL 🔹 Redis ✅ Libraries, technologies, API’s 🔹 Zapier 🔹 n8n 🔹 Retell 🔹 Twillio 🔹 Elevenlabs 🔹 OpenAI 🔹 Pipecat 🔹 Contentful 🔹 Google API 🔹 Facebook API 🔹 Twitter API 🔹 Youtube API 🔹 RESTFull API 🔹 OKPAY API 🔹 JSON 🔹 XML 🔹 Push Notifications ✅ Experience with Environments Tools / Other 🔹 Redmine 🔹 GIT 🔹 Bug tracking systems: JIRA 🔹 Docker 🔹 Linux Ubuntu ✅ Languages 🔹 English – fluent 🔹 Ukrainian – native 🔹 Russian ✅ Next Steps I’d be thrilled to explore how we can ensure your project’s success. Are you available for a free 30 minute consultation? In this session, we’ll review our services, methodologies, communication process, and pricing structure. We’ll also dive into your project details to craft a tailored plan with a timeline and cost estimate. Rest assured, we’re flexible and can accommodate a wide range of budgets. Feel free to message me if you’d like to schedule a meeting, and I’ll provide you with an Upwork scheduler link. ✅ Highlighted Skills Full Stack Development React React.js Next Next.js Express Express.js Node.js Node JavaScript Js AI developer , pipecat , RTVI voice assistant devops php laravel react native developer ux designer erpnext laravel php developer metronic symphony simfony web developer playable ads react wordpress developer full stack developer web developer python developer backend developer sql mysql database web researcher javascript developer full stack developer front end developer full stack php "php laravel" "react native developer" "devops" "laravel php developer" "symfony php developer" "metronic" "symphony" "symphony developer" "web developer" "playable ads" "react" "website design" wordpress developer website design seo Currently i am not working with Laravel | CodeIgniter | Vue.js Vue | Angular |

🇺🇦Mukachevo, Ukraine$45/hr100% JSS5.00 (4)Since Jul 2016

Earnings and projects

MRR
$2.7k

Last 6 months ÷ 6

World#14,496 / 412k
🇺🇦Country#865 / 14.3k
Revenue, last 30 days
$350

Last 6 months: $16k

World#71,156 / 412k
🇺🇦Country#2,690 / 14.3k
Total earnings
$90k

Billed in all: $95k

World#43,836 / 412k
🇺🇦Country#2,879 / 14.3k
Per project
$10k

$5.5k in the last 6 months

World#15,851 / 412k
🇺🇦Country#1,126 / 14.3k
Projects, last 6 months
3
33% fixed67% hourly
World#66,479 / 412k
🇺🇦Country#2,681 / 14.3k
Projects in all
9

Across 10 contracts

50% fixed50% hourly
World#212,268 / 412k
🇺🇦Country#8,529 / 14.3k

Earnings, last 30 days

$94.8k+$350 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$94.4k$94.6k$94.8k$95.0kOct 8Oct 23Nov 7

Skill rankings: Top 3% in ElevenLabs

Ranked by MRR among everyone on Upwork with the skill.

  1. #22ElevenLabs638 freelancers · 🇺🇦 #1Top 3%
  2. #306Tailwind CSS6,978 freelancers · 🇺🇦 #40Top 4%
  3. #368Supabase4,116 freelancers · 🇺🇦 #17Top 9%
  4. #419API7,943 freelancers · 🇺🇦 #68Top 5%
  5. #492AI App Development4,708 freelancers · 🇺🇦 #29Top 10%
  6. #528Laravel12,549 freelancers · 🇺🇦 #72Top 4%
  7. #538Web Application9,341 freelancers · 🇺🇦 #71Top 6%
  8. #574AI Development5,878 freelancers · 🇺🇦 #43Top 10%