Igor P.
Full-stack Mobile App Developer | Swift, Flutter, Kotlin, React
Building an app is easy. Building a product that users love and your business can scale is much harder. For the past 10+ years, I've been helping startups and growing companies turn ideas into production-ready mobile apps, AI products, and SaaS platforms. I don't just write code—I help clients make the right technical decisions, choose the right architecture, and build products that are easy to maintain and grow. Whether you need an MVP, a complete product, or want to modernize an existing application, I can take ownership of the entire development process. Core Expertise: • Native Mobile App Development (iOS & Android) • Cross-Platform Development (Flutter, React Native) • MVP Development for Startups • UI/UX Implementation from Figma • Backend & API Integration (Firebase, REST APIs, WebSockets) • Payment Integration (Stripe, Apple Pay, Google Pay, Checkout) • Push Notifications & Real-Time Features • Location-Based Features (GPS, geofencing, check-ins) • Secure Authentication & User Account Systems • Admin Dashboards & Content Management Tools Mobile App Capabilities: Authentication & User Profiles: • Email/password login, social login, phone verification • Onboarding flows & profile setup UI/UX Development: • Pixel-perfect Figma to app implementation • Clean, modern layouts with transitions and animations • Light & dark mode support Real-Time Features: • WebSockets & real-time data synchronization • Live activity feeds, group updates, notifications • Video streaming with low-latency support Payments & Monetization: • Stripe, Checkout, Apple Pay & Google Pay • Escrow systems • Loyalty & reward programs Location-Based Features: • GPS tracking, geofencing, check-ins • Partner & location listings API & Backend Integration: • Firebase, Supabase • Custom backends with Node.js or Python/FastAPI • Third-party API integration Admin Panels & Dashboards: • Content & menu management • Promotions, analytics & reporting Industries: • Fintech & money transfer • Food ordering & loyalty apps • EdTech & gamified learning • Marketplaces & peer-to-peer resale • Social & community apps • Video security & AI analytics • Health, wellness & fitness apps • Productivity & task management tools Work Approach: • Clear and consistent communication • Milestone-based process • Predictable delivery timelines • End-to-end ownership of mobile development • Long-term maintenance & feature expansion available 💬 Let’s discuss your project — I can deliver a reliable, scalable, cross-platform mobile app from idea to MVP or full product, on time and with high technical quality. Keywords: Flutter Developer, Cross-Platform App, Mobile App, iOS, Android, MVP, SaaS, Figma, Firebase, Supabase, Payment Integration, Real-Time Features, GPS, Admin Dashboard
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $1.5k
Billed in all: $182,433$182k
$1.5k in the last 6 months
Across 101 contracts
Earnings, last 30 days
Skill rankings: Top 17% in Java
Ranked by MRR among everyone on Upwork with the skill.
- #151Mobile App Bug Fix453 freelancers · 🇺🇦 #11Top 33%🇺🇦#11 of 28
- #198Native App Development833 freelancers · 🇺🇦 #21Top 24%🇺🇦#21 of 58
- #372Hybrid App Development1,431 freelancers · 🇺🇦 #24Top 26%🇺🇦#24 of 70
- #662Kotlin3,021 freelancers · 🇺🇦 #52Top 22%🇺🇦#52 of 224
- #737Swift3,634 freelancers · 🇺🇦 #71Top 20%🇺🇦#71 of 314
- #897Mobile App3,535 freelancers · 🇺🇦 #93Top 25%🇺🇦#93 of 306
- #1,028Android4,975 freelancers · 🇺🇦 #114Top 21%🇺🇦#114 of 371
- #1,181Mobile App Design5,198 freelancers · 🇺🇦 #219Top 23%🇺🇦#219 of 685