The idea is still too broad
I turn the wish list into one sharp first release: the smallest product that solves a real customer problem and is worth paying for.
Mobile app development · iOS + Android
Your app idea,in customers' hands.
I turn focused product ideas into polished mobile apps—strategy, UX, engineering, backend, analytics, subscriptions, testing, and store launch, handled by one senior partner.
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A focused v1 can launch in 4–8 weeks. You see a working build in week one. Final timing depends on scope and store review.
idea
Ready to shipApp Store + Google Play
launch
10+ yearssoftware product delivery
iOS + Androidone focused codebase
34k linesshipped solo in Breeze
ToptalVerified Expert
Why projects lose momentum
One good idea should not need five disconnected vendors.
Early-stage apps rarely fail because nobody can write code. They stall because scope, product, design, engineering, quality, and launch pull in different directions. I keep those decisions in one loop.
Too many people own tiny pieces
Product decisions, UX, engineering, backend, analytics, quality, and store delivery stay connected through one accountable partner.
You cannot see progress
You get a working build early and a clear weekly demo. Decisions happen against the real app, not a slide deck or status report.
Launch feels like the finish line
Crash reporting, product analytics, subscriptions, feedback loops, and release automation are built in so launch becomes the start of learning.
One partner, idea to store
Fast because the work stays connected.
Speed comes from making fewer, better decisions—not from skipping the details customers notice. I build the first version around the core promise, then add complexity only when the product earns it.
01
Product direction
Clarify the customer, core job, business model, and first-release boundary before expensive work begins.
MVP scopeUser flowsCompetitive reviewDelivery plan
02
App design & build
Create a fast, coherent cross-platform app with the native details that make it feel at home on both platforms.
React Native + ExpoTypeScriptiOS + AndroidNative integrations
03
Backend & growth stack
Connect the production services the business needs without building a fragile maze of infrastructure.
SupabaseAuthRevenueCatPostHog + Sentry
04
Launch & iteration
Prepare real devices, automated checks, release builds, listings, and post-launch signals for confident shipping.
Jest + MaestroEAS + CIStore submissionRelease support
The launch runway
From “what if?” to a real release.
A short, visible process with useful decisions at every stage. No six-week discovery phase and no black-box build.
1
1–2 days
Make the bet clear
We define who the app is for, the painful moment it improves, the one core flow, and what success looks like.
What you have
A one-page scope, prioritized flow, risks, and fixed next milestone.
2
Week 1
Prove the experience
I shape the navigation, core screens, data model, and technical path, then put the first usable build in your hands.
What you have
A real build you can tap through and react to.
3
Weeks 2–5
Build in short loops
The product grows around the critical path. Every week ends with a working version, a decision log, and the next highest-value slice.
What you have
Core product, backend, analytics, monetization, and release-grade quality.
4
Weeks 4–8
Ship and learn
I harden the app on real devices, prepare both stores, automate releases, and watch the signals that tell us what to improve next.
What you have
A focused v1 in customers’ hands. Timing depends on scope and store review.
Proof: Breeze
I have taken the same journey I'm selling.
As the solo founder of Breeze, I went from initial commit to a public iOS and Android launch—then built the system needed to keep releasing without chaos.
20product screens
6live locales
81Jest tests
52Maestro flows
- React Native + Expo app with a guided panic-attack flow, breathing, CBT tools, journaling, sleep content, and an iOS widget.
- Supabase backend, Apple and Google sign-in, RevenueCat subscriptions, PostHog analytics, and Sentry monitoring.
- Automated releases for both stores with daily-release discipline and zero rolled-back builds through v1.7.1.
production stack9 connected services
releasediOS + Android
Mobile product record
Built from scratch. Helped ship at scale.
Every relationship is labeled plainly. “Built” means I created the product or prototype. Client work reflects my exact role in delivery, release, and product quality.
Built · Open sourceFrontRow
A realistic event-ticketing app built as a mobile automation training playground.
Designed and engineered the iOS/Android app, native bridges, deterministic test states, device-capability demos, deep links, and release artifacts.
React NativeExpoTypeScriptSwiftKotlinMaestro
HEProduct concept · Public prototype
HerFuel
A women-first nutrition tracker with optional life-stage modules and a privacy-first product model.
Created the product strategy, positioning, PRD, data model, screen-by-screen build plan, and working clickable reference app.
Product strategyUXReactSupabaseRevenueCatHealthKit
Client product · Launch & qualityWaves Women
A Kotlin Multiplatform whole-health app for women, released on iOS and Android.
Owned end-to-end release quality from beta through both stores, including AI health insights, analytics events, push messaging, and real-device automation.
Kotlin MultiplatformAppiumBrowserStackFirebaseSQL
Client product · Lead QACarb Manager
A top-rated nutrition app used by more than 8 million customers across iOS, Android, and web.
Led product-quality strategy and release operations; helped double release frequency and reduce production bugs 20% year over year.
iOSAndroidVueCypressFirebaseBugsnag
Client product · FintechNumbrs
A mobile banking app for managing accounts and buying financial products in one place.
Built and ran mobile regression coverage across Android and iOS, including 20 automated cases and hands-on release testing.
EspressoXCUITestKotlinSwiftJenkins
Client product · Betting exchangeMatchbook
A high-volume peer-to-peer betting exchange with mobile apps and a large API surface.
Created the Appium/Python mobile framework from scratch, automated 30 regression cases, and ran both platforms on real BrowserStack devices in CI.
AppiumPythonDockerJenkinsBrowserStackREST API
Client product · SportsbookBetBright
Sports betting and casino experiences across native mobile and web products.
Led hands-on Android and iOS testing, joined feature planning, and built web automation to find defects earlier in delivery.
AndroidiOSJavaSeleniumTestNGJenkins
MIPublic mobile automation project
Missguided
Android retail-app purchase flow backed by API checks for login, registration, and product details.
Built a public Appium page-object project for the shopping flow plus Postman coverage for the supporting account and catalog APIs.
AndroidAppiumPythonPostmanPage objects
Confidential engagementsToptal client apps
Short-cycle mobile and web engagements delivered through Toptal’s vetted talent network.
Worked from exploratory release passes through automation-framework setup while keeping client details under NDA.
Mobile deliveryAutomationRelease QAConsulting
“Mate's expertise was critical in transitioning from a loose collection of contractors to a cohesive and synergized engineering team. He implemented practical testing strategies that reduced regressions and elevated our overall code quality.”
Michael Xavier VinothSenior Software Engineer · Carb Manager
Read on LinkedIn ↗A good fit?
You need a product partner, not an order-taker.
This works best for a founder or small product team with a real customer problem, a reachable decision-maker, and the appetite to release a focused first version quickly.
Strong fit
- Consumer health, wellness, fintech, membership, or utility apps
- A new MVP or a stalled product that needs one accountable owner
- Teams that value weekly builds and direct, practical decisions
Probably not a fit
- Large games or graphics-heavy 3D products
- Projects that need a large team before the core use case is proven
- A fixed feature list with no room to question low-value work
Questions, answered
The practical details.
How quickly can we get to a real app?+
A focused first release can often reach iOS and Android in 4–8 weeks. The honest answer depends on the number of core flows, integrations, content, and store requirements. The first working build arrives much earlier, so you are never waiting weeks to see whether the direction works.
Do I need finished designs or a technical specification?+
No. A useful customer problem and access to the decision-maker are enough to start. I can turn rough notes, sketches, or an existing workflow into a scoped product, user flows, and a build plan.
Will the app work on both iPhone and Android?+
Yes. I usually use React Native and Expo for one maintainable product across both platforms, then add Swift or Kotlin where a native integration genuinely needs it.
Can you handle subscriptions, login, analytics, and the backend?+
Yes. My production stack includes Supabase, Apple and Google sign-in, RevenueCat subscriptions, PostHog analytics, Sentry monitoring, notifications, localization, and automated releases.
What happens after launch?+
We use real product and stability data to choose the next release. I can stay on for iteration and release ownership or hand over a documented codebase, delivery pipeline, and prioritized roadmap to your team.
Your next useful step
Bring the idea. Leave with a launch plan.
In 30 minutes, we'll identify the smallest valuable first release, the biggest delivery risk, and whether I'm the right person to build it with you.
No pitch deck required. Rough notes are welcome.