01 / Cross-platform iOS & Android
From MVP to 7-figure ARR.
Production platforms on TypeScript, Go, and Postgres. Built so you don't need to rewrite for high-growth scaling.
TypeScript · Go · Postgres · Redis
Mobile App Engineering Practice
Mobile apps, engineered for 60fps performance.
We build offline-first, high-performance mobile applications in Flutter, React Native or fully native Swift and Kotlin, choosing the stack after requirement analysis. Native-grade touch responsiveness, zero-lag state synchronization, and reliable App Store / Play Store approvals.
40+
SaaS launched
99.99%
FPS Frame Rate
250k+
Users scaled
$ redrhynos deploy --tenant=acme
→ Provisioning isolated schema ✓
→ Rotating per-tenant KMS key ✓
→ Running migrations (12) ✓
→ Streaming audit logs to S3 ✓
Deployed in 42s · p95 latency 38ms
API calls
12.4M
Conversion
8.2%
Error rate
0.04%
Who we build for
Founders past MVP.
Founders past MVP.
CTOs facing the rewrite.
Mobile-First Startups
Reach users on iOS and Android simultaneously without doubling your engineering headcount or budget.
Product Leaders
You need an offline-first mobile app that seamlessly syncs state back to your existing web backend.
Field Ops & Enterprise Teams
Secure, SOC 2-compliant mobile tools for field operators, inspectors, and enterprise staff working on site.
FinTech & Retail Brands
High-conversion native apps with biometric authentication, push notifications, and sub-50ms UX.
Services
Everything you need
Everything you need
to ship enterprise SaaS.
Six engineering practices, one senior team. We staff every engagement with people who've shipped your problem before.
02 / Multi-tenant architecture
Hardened isolation, by default.
Row-level security, per-tenant encryption keys, cost attribution. Designed for regulated industries from day one.
RLS · KMS · Tenant-scoped audit
03 / Cloud infrastructure
Terraform-first AWS & GCP.
Auto-scaling, observability, IaC on the first commit. Cloud bills the CFO won't be ambushed by.
AWS · GCP · Terraform · OpenTelemetry
04 / API platforms
Built for third-party adoption.
REST and GraphQL APIs - versioned, rate-limited, instrumented, and documented to the standard your customers expect.
REST · GraphQL · Webhooks · OpenAPI
05 / Product design
Design that ships, not Figma fiction.
Interfaces that reduce churn measurably. Designers and engineers in the same Slack channel - no handoff black holes.
Figma · Storybook · Tailwind
06 / Scale & optimize
Cut cloud bills 40-60%.
Performance audits, query plans, infra rightsizing. Track record of cutting legacy workload spend without product changes.
pgBadger · Datadog · k6 · Profiling
Architecture review
Request review
A 1-week paid sprint. You leave with a written remediation plan.
Engineering philosophy
Fluidity is a feature, not an afterthought.
Clunky apps get uninstalled instantly. We profile frame drops, memory consumption, and thread utilization from day one.
01
Scalability-first architecture
Horizontal scaling, async job queues, and read replicas in every project - not because you need them on day one, but because retrofitting them at 50k users costs six months you don't have.
02
Cross-platform native feel
We don't use wrapped web views. Whether we build in Flutter, React Native or pure Swift and Kotlin, the app is compiled to run natively and feels right on every device.
03
Production-grade from week one
CI/CD, observability, and infrastructure-as-code on the first commit. We move fast - but every shortcut is documented and tracked, never hidden in a TODO.
04
Performance & cost obsession
We profile before we optimize, and we optimize before we scale. Average cloud bill on RedRhynos-built systems: 47% lower than industry baseline.
Process
A predictable path from
A predictable path from
kickoff to launch.
-
01
Discovery
Stack audit, growth model review, risk mapping. Fixed-fee, written deliverable.
-
02
Architecture
Schema, infra, and integration boundaries on paper before a line of code.
-
03
Build
Two-week sprints, weekly demos, shipping behind feature flags.
-
04
Hardening
Load tests, security review, compliance checks before any production traffic.
-
05
Launch & scale
CI/CD, on-call runbooks, and a 90-day scale plan handed to your team.
Selected work
View all case studies
Platforms in production.
Customer Mobile App
AMAID.co: Customer App
Phase 2 · iOS & Android
Problem
Customers could only book through one plain web form, with no prices shown and no way to manage a recurring clean.
Solution
Native iOS and Android apps with live pricing, arrival windows, add-ons, and subscriptions where each visit can be customized.
Result
- App Store & Play both apps live
- Live pricing by hours and cleaners
- Per visit customizable subscriptions
Service Provider App
AMAID.co: Cleaner App
Phase 3 · iOS & Android
Problem
Cleaners had no tools at all: jobs, directions, check-ins and payouts were all handled by hand.
Solution
A cleaner app with in-app onboarding, one-tap job claiming, a departure checklist, live tracking, earnings and an SOS button.
Result
- 2 codes verify the start and finish of every job
- 1 tap SOS to the safety team
- Stripe payouts to cleaners' bank accounts
The stack
Modern tech, native feel.
We don't ship the framework-of-the-month. We ship what your team will still be able to maintain in three years - and what you can hire for in any time zone.
FrontendNext.js · React
BackendTypeScript · Go
DatabasePostgres · Redis
SearchOpenSearch
QueueSQS · Temporal
CloudAWS · GCP
IaCTerraform
ObservabilityDatadog · OTel
CI/CDGitHub Actions
FAQ
Common questions, answered straight.
Don't see yours? Ask directly - we reply within four hours on weekdays.
What does a custom mobile app cost to build?
Pricing depends on various factors including target platforms (iOS, Android, Web), backend integrations, offline capabilities, and design complexity. We get on a call to discuss your exact requirements and tailor a scope suited to your product goals.
How long does a multi-tenant SaaS build take?
A focused cross-platform MVP ships to Apple App Store and Google Play in 6-10 weeks. Complex enterprise apps take 12-16 weeks.
Do you handle SOC 2, HIPAA, or GDPR compliance?
SOC 2 readiness is built in by default - audit logs, RBAC, encryption, and access reviews on day one. HIPAA, GDPR, and ISO 27001 are available as scoped add-ons. We don't issue the certifications, but we get you to "auditor-ready" in writing.
Can you take over an existing SaaS codebase?
Yes - we run a 1-week paid audit, deliver a written remediation plan, and either modernize the existing stack or scope a phased rebuild. About 40% of our engagements start this way.
Who owns the code, infrastructure, and IP?
You do. Repos and cloud accounts are in your name from day one. We work as collaborators inside your org, not as a black-box vendor.
What does the on-call handover look like?
Every engagement ends with a handoff doc: architecture, runbooks, on-call rotations, and a 90-day scale plan. We can stay on retainer for shared on-call coverage if your team isn't ready yet.
Guides & insights
Read the blog
Straight answers before you build.
Mobile apps
React Native vs Flutter in 2026
How to pick between React Native, Flutter and fully native apps.
Buyer's guide
How to choose a software development company in India
What to verify, what to ask and the red flags to walk away from.
Engineering
AI-assisted SaaS engineering: governance first
Where AI speeds up delivery, and where it needs guardrails.
Start a project
Ready to ship a mobile app users actually want to open?
We'll reply within four business hours with either a discovery proposal or an honest "not us, here's who" referral.
Or book a 30-min architecture review