Hire Dedicated Android Developers
Hire Android Developers Who Ship Kotlin That Runs Everywhere
Android is not one device. It is thousands, across a dozen OEM skins, several live API levels and battery managers that quietly kill your background work. Stallyons is a Delaware-registered US company whose senior Kotlin engineers work your hours, on one contract.
Triple Protection Guarantee
- US-Registered Entity
- Signed IP Assignment
- Senior Kotlin Engineers
Triple Protection Guarantee:
- US-Registered Entity
- Signed IP Assignment
- Senior Kotlin Engineers
Engineers On Staff
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Avg. Engineer Exp.
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Years In Business
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Why Android Is Hard
Kotlin & Compose
Native Only
Senior Devs Only
Vetted Devs
Timezone Overlap
Live Hours
IP Protection
Signed First
Delaware LLC
US Entity
Data Security
Access Rules
Device Coverage
Real Phones
Communication Rhythm
Daily Sync
Rollout Path
Play Tracks
IP Assignment
Signed
Delivery Overlap
Fixed
Hours
Code & IP Owner
You
Trusted By Startups
What Android Developers Actually Do For You
Hiring Android developers means putting engineers on your product who write Kotlin against the Jetpack libraries, design to Material guidelines, and plan for a device matrix rather than one reference phone. The hard part is rarely the first build. It is keeping that build correct across OEM skins, rising target-API deadlines, background-execution limits and a Play policy that moves more often than the SDK does.
Stallyons is registered in Delaware as a US company and our senior engineers work global hours, which is what makes a distributed Android team practical rather than theoretical. You sign a US contract, run diligence on a US entity and pay one US invoice, while the engineers on your account are the ones actually writing the Kotlin. We work with founders, CTOs and product leaders across the United States, Canada, the UK and Europe, the Middle East, Singapore, Australia, New Zealand and South Africa.
What Our Android Team Covers
Coverage before polish: we agree the device and API-level matrix with you first and build against it, so the app behaves the same on a flagship, a three-year-old mid-range handset and whatever your users actually carry.
Delivery on your clock: we agree an overlap window before anything starts, so stand-ups, release-track decisions and rollout halts happen live with your working day instead of queuing overnight.
IP protection and security: NDA and IP assignment are signed before a single credential moves, and your Play Console, signing keys and Play App Signing enrolment stay with your own organisation.
Risk mitigation built into the engagement: written scope, named engineers, documented decisions and briefed cover, so a target-API deadline never lands with nobody available to meet it.
Quality control you can inspect: code review on every merge, unit and Espresso coverage, an agreed definition of done, and internal-track builds you install before any rollout.
One accountable vendor: one contract, one invoice, one entity to run legal and finance diligence on, rather than a build team, a QA vendor and whoever last held the upload key.
Why Product Teams Hire Dedicated Android Developers
- Ask which devices and API levels they tested on, and how. A team that only names emulators has not met the mid-range handset most of your users are holding.
- Get the IP wording in writing: assignment of everything produced, no licence-back, no shared ownership, and the NDA executed before any credential moves.
- Check who holds the Play Console account and the upload key. Both belong to your organisation, enrolled in Play App Signing, before the first release.
- Agree the cadence up front: which ceremonies you sit in, what gets written down, where work is tracked, and how a problem reaches you before it becomes a surprise.
- Ask how they handle background work. Doze, battery optimisation and OEM task killers break more Android features than any bug, and the fixes are architectural.
- Insist on a written handover: decisions, open threads and known issues documented as work happens, so whoever picks it up next reads instead of guesses.
How To Hire Android Developers Properly
Every engagement starts with a free 45-minute strategy session. No slide deck, no sales script. You bring the product and the device reality; you leave with a recommended team shape, a scope and a timeline.
We are selective about new engagements and cap how many we run at once, because the vetting is the product. If we cannot staff your build with Kotlin engineers we would vouch for, we will say so.
Why Clients Choose Us
Full
Written IP Transfer
USA
Contract Entity
Yours
Play Console Keys
Named
Senior Kotlin
Ready to put senior Kotlin engineers on your app?
What Our Android Devs Build
What You Can Build With Android Developers
Android rewards teams who plan for the device matrix before they write the first screen. These are the builds we take on most often, each with an agreed scope, an overlap window and one review standard on every merge.
Consumer Android Apps
Kotlin, Jetpack Compose, Play Store
End-to-End
Tablets & Foldable
Adaptive layouts, large screens
One Codebase
Wear OS & TV Apps
Watch faces, tiles, Android TV UI
On Wrist
Enterprise Android Apps
MDM, kiosk mode, private tracks
Live In Production
Compose Move
Java to Kotlin, XML to Compose
Incremental
Billing & Payments
Play Billing, subscriptions, UPI
Checkout
APIs And Integrations
REST, GraphQL, FCM push, maps
Linked
QA & Test Automation
Espresso, device farms, internal tracks
Sign-Off
Play Store Releases
Submission, policy, staged rollout
Shipped Live
Support & Maintenance
Crash triage, API-level upgrades
Kept Running
Not sure what your Android build needs? Let's scope it out.
Common Challenges
Why Android Developers Get Replaced
Six ways Android builds come apart after launch, and none of them show up on the developer's own phone.
One Device Tested
01
It works on the developer's flagship and breaks on a three-year-old mid-range handset with an aggressive OEM skin. Without a device matrix agreed up front, your first bad review is the test report.
Background Work Dies
02
Doze, battery optimisation and OEM task killers stop sync, uploads and alarms. Teams who learn this after launch rewrite the feature rather than patch it.
Juniors On Your App
03
The senior engineer in the pitch is rarely the one who writes the code. Nobody tells you when the work moves across to whoever is on the bench.
Upload Key Lost
04
Plenty of apps ship under a vendor's Play Console with a signing key nobody else holds. Losing either one can mean publishing your app again as a brand new listing.
Target API Deadlines
05
Google raises the required target API level every year, and apps that miss it stop being served to new users. It is scheduled work that still arrives as a surprise.
Play Policy Rejections
06
Permissions, data-safety declarations and billing rules are enforced at policy review, not by the compiler. One rejected update can freeze a release for weeks.
Lived through a few of these? Let's do it right.
Our Android Services
6 Ways To Hire Android Developers Here
Six ways to put senior Kotlin engineers on your product under one contract. Run one, or run several at the same time.
End-To-End Android Builds
01
End-to-end delivery of a defined Android product or module: scope, build, test across the agreed device matrix, and release through Play tracks, with a named lead reporting to you.
Dedicated Kotlin Team
02
A standing Android engineering base working alongside your in-house team. Same tools, same board, same review rules, without you competing for Kotlin engineers in your own market.
Compose Modernization
03
Java and XML-view apps moved to Kotlin and Jetpack Compose screen by screen, with the shipped app live on Play and working the whole way through.
Android QA & Device Labs
04
Testing that runs on your release cycle: unit and Espresso suites, real-device passes on a physical and cloud matrix, and a sign-off before each rollout.
Play Store & Release Ops
05
Gradle and CI pipelines, Play App Signing, internal and closed tracks, staged rollout with halt criteria, and the data-safety work Play now demands.
Backend, APIs & Integrations
06
The services behind the app: REST and GraphQL endpoints, FCM push, auth, Play Billing and third-party SDKs, built and tested against your own environments.
Not sure which Android engagement fits? Let's scope it together.
Why Choose Us
Why Teams Keep Our Android Developers On Contract
The details that decide whether an Android build survives contact with real devices.
A US Legal Entity
01
Stallyons is registered in Delaware. Your contract, your invoice and your legal recourse sit with a US company, not an unknown one.
Native, Not Wrapped
02
We write Kotlin against the Jetpack libraries. If a cross-platform tool suits your product better, we will tell you that first.
Overlap You Set
03
You choose the hours we share with your working day, and stand-ups, reviews and escalations all happen inside that window.
Your Play Console
04
Your organisation holds the Play Console and the signing key, enrolled in Play App Signing. We work inside it with access scoped per person.
Reviewed Code
05
Every merge is reviewed against an agreed definition of done, on your board, where you can read it yourself.
One Contract
06
One contract covers the engagement, so procurement, legal and finance each deal with a single named counterparty.
Ready to see how we run an Android build here?
Our Process
Six Steps From First Call To Working Android Developers
A buying process built to surface the risks early, before anyone signs or writes any Kotlin.
Discovery
Understand the app, devices, hours and budget
Scoping
Agree the model, scope and cost structure
Select
Meet and approve the Kotlin engineers assigned
Contracting
NDA, IP assignment, access and onboarding
Deliver
Internal-track builds, reviewed on merge
Review & Scale
Regular reviews, adjust the scope as needed
Want to see how this maps to your roadmap?
Technology Stack
Everything Our Android Developers Build With
The languages, Jetpack libraries and release tooling our Android engineers work in every single day.
Languages & UI
Kotlin / Compose
Java / XML UI
Coroutines / Flow
Gradle / KSP
Android SDK
Android Platform & APIs
Jetpack Libs
Wear OS / Auto
Room / Paging
Hilt DI
CameraX / ML Kit
AI / ML / Data
OpenAI / Claude
Gemini / Nano
PyTorch / TensorFlow
Hugging Face
On-Device Inference
Backend & Data
Node.js / REST
Firebase SDK
PostgreSQL
GraphQL / MongoDB
Python / Django
Cloud & DevOps
AWS / GCP / Azure
Gradle Builds
GitHub Actions
Play Console & Tracks
Crashlytics / Logs
Industries We Serve
Android Developers Who Know Your Sector's Constraints
Engineers who already know your compliance rules and your users' device reality ship in month one, not month three.
Fintech & Payments
UPI, wallets, KYC, card rails
Healthcare & HealthTech
Patient apps, portals, records
Retail & E-Commerce
Storefronts, Play Billing, scan
EdTech & Learning
Courses, video, offline downloads
SaaS & Digital Products
Subscriptions, SSO, onboarding
Logistics & Supply Chain
Driver apps, scanning, routing
Manufacturing & IoT
BLE sensors, telemetry, kiosk
Agencies & Consultancies
White-label Android capacity
We know your industry. Let's plan the Android build.
How We Compare
How Android Developers Compare, Option By Option
An honest look at your four hiring options.
| Capability | Local Android Agency | Freelance Marketplace | Large Dev Vendor | Stallyons Technologies |
|---|---|---|---|---|
| Kotlin & Compose Depth | In-House Kotlin | ✕ Unverified | ✕ Wrapped Web | Kotlin Specialists Only |
| Device Test Matrix | On Request | ✕ One Handset | ✕ Emulators Only | Agreed Device Matrix |
| Real Overlap Hours | Same Time Zone | ✕ Whenever | Shift Handover | Agreed Overlap |
| Contracting Entity | Local Entity | ✕ Platform Terms | Overseas Entity | US-Registered LLC |
| Play Console & Key | On Request | ✕ Vendor Owned | Negotiated | Yours And Play-Signed |
| IP Assignment | In The Contract | ✕ Platform Default | Negotiated | Signed Before Access |
| Target API Upkeep | Billed Extra | ✕ Not Covered | ✕ Change Request | Tracked Every Year |
| Handover & Lock-In | On Request | ✕ Nothing Written | ✕ Vendor Lock-In | Documented Handover |
See the difference for yourself
Complete Engagement
Included In Every Engagement With Our Android Developers
From Scoping to Contracting to Rollout, One Team
Here's everything included when you hire Android developers here:
All-Inclusive Android Delivery: No Hidden Fees, No Surprises.
Every Android engagement includes all eight components above. One contract, one senior team, one agreed device matrix, no vendor sprawl.
🔒 No obligation. We'll deliver a detailed proposal within 48 hours.
Plus, Get These Free Bonuses
Free Android App Audit
A written read on your device matrix, your target-API standing and where background work will break, plus what has to be true before a release date is real.
Included Free
Delivery Plan & Estimate
A phased delivery plan with scope, milestones, a stack recommendation and a transparent, itemized estimate for the engagement.
Included Free
Free Vetting Checklist
The questions we would ask any Android team about devices, the Play Console, security and staffing, so you can put us through it too.
Included Free
Risk-Free Partnership
Our Android Developers' Promise
We stand behind every engagement with commitments that protect your investment.
01
Scope Agreed First
Scope, model, working hours and cost structure are written down and agreed before contracting, so nothing is discovered later.
02
Built to Last
Senior developers, code review, automated tests, security and accessibility audits, and clean, documented code you fully own.
03
IP And Access Protected
NDA and IP assignment are signed before access, permissions are scoped per person, and your Play Console and signing keys stay yours.
Start your Android build with confidence, backed by our Triple Protection Guarantee.
Track Record
Engagements That Ship, Scale, and Compound
500+
Projects Delivered
29+
Service Categories
81%
Repeat Client Rate
4.9 ★
Clutch Rating
"We came to Stallyons after burning two years and four vendors on a multi-platform launch that kept slipping. They scoped it end-to-end — web app, iOS, Android, an AI summarization layer, and a Shopify integration — and shipped it in 22 weeks. One team, one budget, one quality bar. We've handed them three more engagements since."
Mark Sawyer
CEO/Founder
PlatinumLED
"Stallyons rebuilt our customer-facing portal, integrated three legacy systems, shipped an AI document analysis pipeline, and brought our compliance posture to SOC 2 — all under one engagement. The senior engineers on the team have shipped at companies five times our size. It's the best vendor decision we've made in a decade."
Mark Sawyer
CEO/Founder
PlatinumLED
FAQ
Frequently Asked Questions On Android Developers
An Android developer builds and maintains apps for the Android platform, writing Kotlin against the Jetpack libraries and Material components. The job runs wider than the code: choosing a minimum API level, designing for a device matrix rather than one phone, working around background-execution limits, keeping Gradle builds healthy, and getting releases through Play policy review and staged rollout.
We agree a device matrix with you before the first sprint: minimum and target API levels, the OEM skins your analytics actually show, screen classes including foldables, and the low-end hardware you need to keep supporting. Testing runs on real devices plus a cloud device farm rather than emulators alone, and OEM behaviour around battery optimisation and background work is treated as a design constraint, not a bug found late.
Rates move with seniority, region and how much management you buy, so a single number quoted before any questions is a guess. On Android the bigger cost driver is usually the device and API matrix you commit to, because it sets the testing load for the life of the app. We price after scoping, itemized, so you see the trade-off before committing.
Install the apps instead of reading the case study. Check the update history on Play, whether the listing shows recent target-API compliance, and how the app behaves on an older mid-range phone. Then ask the team to explain one background-work problem they solved and how they tested it. Vague answers there predict the rest of the engagement.
You do, from the first commit. NDA and IP assignment are signed before anyone gets repository access, with no licence-back and no shared ownership. The Play Console account is registered to your organisation and the app is enrolled in Play App Signing, so an upload key can be reset without you losing the listing.
Releases go through internal and closed tracks before anything reaches production, then a staged rollout with agreed halt criteria and crash thresholds. Data-safety declarations, permission justifications and billing rules are checked against current policy before submission, because Play enforces those at review rather than at build time.
You set an overlap window before work starts, and stand-ups, release decisions and rollout halts happen inside it, whether you sit in North America, the UK and Europe, the Middle East, Singapore, or Australia and New Zealand. Work is tracked on your board, decisions are written down, and you escalate to a named lead rather than a shared inbox.
Anything that has to run while the app is closed is designed around WorkManager, foreground services and the platform’s own scheduling rules, not a timer that OEM battery managers will kill. We test that behaviour on the handsets known to be aggressive about it, and we tell you up front which features will need a user-facing exemption.
Still have questions? Let's talk.
Schedule an appointment with us today!
Ready to Hire Android Developers The Right Way?
Get a free consultation. We'll go through your device matrix, recommend a team shape, and send a written proposal.
