Mobile Application DevelopmentSofiya Stoyanovska
We build mobile apps that connect with people and drive real business growth - not just live on a screen.
Our team combines thoughtful UX/UI design, reliable engineering, and seamless integrations to create apps users love and businesses depend on.
From MVPs to full-scale products, we guide you through every step - strategy, design, development, testing, and launch - ensuring your app makes an impact from day one.
Think of us as your tech partner, genuinely invested in your success and the long-term value of your product.
What's included
Kick-off Phase
A quick collaborative workshop to understand your goals, target users, monetization model, and success metrics.
👉 You get: project brief, target personas, core feature list, success KPIs.
👉 We need: stakeholder access, brand assets, sample apps or design inspirations.
👉 Why it matters: aligns expectations and keeps the project focused on measurable value.
Discovery Phase
We define the initial scope, technical stack, and release priorities. If an idea requires validation, we develop a Proof of Concept (PoC) to identify the best implementation approach.
👉 You get: project plan, tech decisions, PoC for complex features, and a phased release plan (MVP → v1 → growth).
👉 We need: business priorities, a list of must-have vs. nice-to-have features.
👉 Why it matters: prevents scope creep and accelerates time-to-market.
User Flows & Wireframes
We design core user journeys and low-fidelity wireframes to confirm structure and usability before visual design begins.
👉 You get: user flows, clickable wireframes, and interaction notes.
👉 We need: feedback from your product or marketing team.
UI Design
We create high-fidelity screens, a reusable component library, motion principles, and design tokens for a cohesive visual identity.
👉 You get: hi-fi mockups, interactive prototype, and style guide.
👉 Why it matters: speeds up development and ensures brand consistency.
Development
We build responsive screens, animations, localization, and integrate required APIs and third-party services - all fully documented. Incremental staging builds are shared for review through App Store Connect and APK files.
👉 You get: staging builds, accessibility checks, and technical documentation.
👉 We need: API keys, Apple & Google developer accounts, and compliance info.
QA & Performance Testing
We perform manual and automated testing - including unit, integration, and end-to-end tests - plus device matrix testing, performance profiling, and security scans. We also manage beta testing via TestFlight and Google Play internal tracks.
👉 You get: QA reports, bug tracker, test cases, test scripts, and a remediation plan.
👉 Why it matters: prevents post-launch issues and builds user confidence.
This phase runs in parallel with development to ensure a smooth launch.
Store Submission & Launch
We prepare store listings, screenshots, ASO content, and privacy policies, then handle submission to the App Store and Google Play. We also manage review responses and the initial rollout strategy.
👉 You get: live app, store assets, launch checklist, and rollback plan.
👉 We need: signing keys and legal/compliance details for in-app purchases.
FAQs
An MVP (Minimum Viable Product) typically takes 6–8 weeks, while a full-featured app may take 2–5 months. After the Discovery Phase, you’ll receive a detailed timeline with milestones.
Yes - we usually use React Native to build cross-platform apps efficiently.
If your project requires fully native iOS or Android development, we can handle that as well.
Absolutely. Our UX/UI team creates intuitive, beautiful interfaces tailored to your users.
Already have a design? We’ll bring it to life with precision.
Yes. We strictly follow Apple’s and Google’s guidelines to minimize rejection risks. We also handle store submission, asset preparation, and review responses for a smooth approval process.
Of course. We integrate subscriptions, one-time purchases, and third-party payment gateways, fully aligned with App Store and Play Market policies.
We stay with you post-launch. Our ongoing support and maintenance plans ensure your app stays optimized, secure, and continuously improving as your business grows.
Yes. We integrate tools like RevenueCat, Mixpanel, and AppsFlyer so you can track user activity, engagement, and retention from day one.
Sofiya's other services
Starting at$40 /hr
Tags
Expo
Firebase
JavaScript
Node.js
React Native
Android Developer
iOS Developer
Mobile Engineer
Service provided by
Sofiya Stoyanovska Vienna, Austria
- 2
- Followers
Mobile Application DevelopmentSofiya Stoyanovska
Starting at$40 /hr
Tags
Expo
Firebase
JavaScript
Node.js
React Native
Android Developer
iOS Developer
Mobile Engineer
We build mobile apps that connect with people and drive real business growth - not just live on a screen.
Our team combines thoughtful UX/UI design, reliable engineering, and seamless integrations to create apps users love and businesses depend on.
From MVPs to full-scale products, we guide you through every step - strategy, design, development, testing, and launch - ensuring your app makes an impact from day one.
Think of us as your tech partner, genuinely invested in your success and the long-term value of your product.
What's included
Kick-off Phase
A quick collaborative workshop to understand your goals, target users, monetization model, and success metrics.
👉 You get: project brief, target personas, core feature list, success KPIs.
👉 We need: stakeholder access, brand assets, sample apps or design inspirations.
👉 Why it matters: aligns expectations and keeps the project focused on measurable value.
Discovery Phase
We define the initial scope, technical stack, and release priorities. If an idea requires validation, we develop a Proof of Concept (PoC) to identify the best implementation approach.
👉 You get: project plan, tech decisions, PoC for complex features, and a phased release plan (MVP → v1 → growth).
👉 We need: business priorities, a list of must-have vs. nice-to-have features.
👉 Why it matters: prevents scope creep and accelerates time-to-market.
User Flows & Wireframes
We design core user journeys and low-fidelity wireframes to confirm structure and usability before visual design begins.
👉 You get: user flows, clickable wireframes, and interaction notes.
👉 We need: feedback from your product or marketing team.
UI Design
We create high-fidelity screens, a reusable component library, motion principles, and design tokens for a cohesive visual identity.
👉 You get: hi-fi mockups, interactive prototype, and style guide.
👉 Why it matters: speeds up development and ensures brand consistency.
Development
We build responsive screens, animations, localization, and integrate required APIs and third-party services - all fully documented. Incremental staging builds are shared for review through App Store Connect and APK files.
👉 You get: staging builds, accessibility checks, and technical documentation.
👉 We need: API keys, Apple & Google developer accounts, and compliance info.
QA & Performance Testing
We perform manual and automated testing - including unit, integration, and end-to-end tests - plus device matrix testing, performance profiling, and security scans. We also manage beta testing via TestFlight and Google Play internal tracks.
👉 You get: QA reports, bug tracker, test cases, test scripts, and a remediation plan.
👉 Why it matters: prevents post-launch issues and builds user confidence.
This phase runs in parallel with development to ensure a smooth launch.
Store Submission & Launch
We prepare store listings, screenshots, ASO content, and privacy policies, then handle submission to the App Store and Google Play. We also manage review responses and the initial rollout strategy.
👉 You get: live app, store assets, launch checklist, and rollback plan.
👉 We need: signing keys and legal/compliance details for in-app purchases.
FAQs
An MVP (Minimum Viable Product) typically takes 6–8 weeks, while a full-featured app may take 2–5 months. After the Discovery Phase, you’ll receive a detailed timeline with milestones.
Yes - we usually use React Native to build cross-platform apps efficiently.
If your project requires fully native iOS or Android development, we can handle that as well.
Absolutely. Our UX/UI team creates intuitive, beautiful interfaces tailored to your users.
Already have a design? We’ll bring it to life with precision.
Yes. We strictly follow Apple’s and Google’s guidelines to minimize rejection risks. We also handle store submission, asset preparation, and review responses for a smooth approval process.
Of course. We integrate subscriptions, one-time purchases, and third-party payment gateways, fully aligned with App Store and Play Market policies.
We stay with you post-launch. Our ongoing support and maintenance plans ensure your app stays optimized, secure, and continuously improving as your business grows.
Yes. We integrate tools like RevenueCat, Mixpanel, and AppsFlyer so you can track user activity, engagement, and retention from day one.
Sofiya's other services
$40 /hr