Your investors will audit your app before they fund you. Most startups fail this audit. We build apps that pass—so you close your round.
You've raised Seed. Your app works—barely. It crashes during demos. Reviews sit at 2.8★. Load times hit 8 seconds.
Now you're raising Series A. VCs will audit your code. They'll find:
Every week you wait burns $50-100K in runway.
We'll tell you exactly what's broken and how to fix it.
We map your current app, find what breaks at scale, and design the fix. You get a technical roadmap investors trust.
Timeline: 2 weeks.
We rebuild your app foundation to handle 200K concurrent users. React Native + TypeScript for stability. Full error tracking and monitoring.
Timeline: 8-12 weeks.
We implement authentication, encrypt user data, and close security vulnerabilities. You pass SOC 2 and GDPR audits.
Timeline: 4 weeks.
We cut load times from 8 seconds to under 2. We reduce crashes to under 1%. We fix the bugs that kill your ratings.
Timeline: 4-6 weeks.
We document your architecture, write technical specs, and create the materials VCs review during due diligence.
Timeline: 2 weeks.
| Traditional Agency | Vermillion |
|---|---|
| Junior devs learning on your dime | Senior engineers (10+ years) |
| Monthly retainers, no guarantees | Performance pricing—you win, we win |
| Disappear after launch | Hand you trained team, walk away |
| Build what you ask for | Tell you what you actually need |
| Bill hourly forever | Fixed scope, clear timeline |
Let's discuss your mobile app development needs.
We specialize in React Native because it lets you build iOS and Android apps from one codebase. You ship faster. You maintain less code. You scale more efficiently.
Most agencies treat React Native like a website. We build native-quality apps that perform like they were written in Swift or Kotlin.
Let's map out your technical roadmap and timeline.
Start Your ProjectSometimes React Native isn't the answer. When you need maximum performance or deep platform integration, we build native.
We write Swift (not Objective-C). We follow Apple's Human Interface Guidelines. We optimize for every iPhone and iPad. Your app feels like it belongs on iOS.
We write Kotlin (not Java). We follow Material Design principles. We test on real devices—not just emulators. Your app works on Samsung, Google, OnePlus, and everything else.
The question isn't "React Native vs native." It's "what gets you to Series A fastest."
Most of our clients start with React Native. When they raise Series A or B, we help them decide if native makes sense. We've done both paths dozens of times.
We'll help you choose the right approach for your startup.
Your app is only as good as your backend. We build APIs that scale to millions of users using Python, NestJS, or Go.
How we choose: If your team writes TypeScript, we use NestJS. If you need ML or data processing, we use Python. If you need maximum performance, we use Go. Most startups start with NestJS or Python.
We build with Expo because it gives you superpowers other agencies can't match.
You find a critical bug. With traditional apps, you submit to app stores and wait 24-48 hours. With Expo Updates, you push a fix and users get it in minutes.
PicklePlay found a crash affecting 15% of users on Friday night. We pushed a fix via Expo Updates in 20 minutes. By Saturday morning, 98% of users had the update. No app store submission needed.
When we don't use Expo: If you need complex native modules or custom native code, we use bare React Native workflow. But 80% of apps don't need this.
Ship faster and deploy fixes instantly with our Expo expertise.
PicklePlay had 10K users but their app was broken. Crashes hit 30% of sessions. Reviews averaged 2.8★. Poor architecture made every new feature take weeks. Their Series A was stalled—investors saw the crash reports and walked away.
We rebuilt their React Native app from the ground up. Implemented Zustand for clean state management. Built a new Python backend with proper API design. Added Sentry for error tracking and fixed root causes systematically. Optimized database queries that were killing performance. Reduced crashes from 30% to under 1%.
Crash rate:
30% → 0.8%
App rating:
2.8★ → 4.5★
Users:
10K → 200K
Exit:
Acquired by UTR
"Vermillion rebuilt our app in 12 weeks. We went from losing users daily to 200K active users. UTR acquired us shortly after."
— Blake Renaud, Founder, PicklePlay
Ready to scale like PicklePlay?
Get Your Success RoadmapWe audit your app, map problems, and create your rebuild roadmap. You get a technical document that shows investors you have a plan.
We rebuild your infrastructure to handle scale. You get weekly demos showing progress. Your app becomes stable enough to grow.
We optimize performance, write documentation, and train your team. You're ready for technical due diligence.
We hand you a trained team and walk away. You own the code. You know how to maintain it.
Investment: $400K-$600K depending on scope.
Most clients use unspent R&D credits.
Discuss Your TimelineWe're senior engineers with 10+ years experience. We've built apps that raised $200M+. Cheap agencies create tech debt that costs 3x to fix later.
Transparent pricing. No hidden fees.
Interviews, code review, user flows, risk mapping. You get a project brief and technical roadmap.
Wireframes, key screens, API definitions, schema, integrations. You approve before build.
2-week sprints with Friday demos. You test, give feedback, we adjust.
Automated + manual + performance testing on 20+ devices. Prep for app store submission.
Submit to stores, train your team, hand over docs, credentials, infra. You own everything.
Get a customized development plan and timeline.
Request Your PlanAvoid these mistakes. Work with senior engineers.
Talk to Our TeamWe'll show you relevant case studies and technical approaches.
We work with 12 clients per year. Seven spots left for 2025.
Limited availability. Book your strategy session now.
MVP: 8-12 weeks. Full product: 16-20 weeks. Timeline depends on complexity and how fast you make decisions.
Yes. We build both using React Native (single codebase) or native development (separate codebases). We recommend React Native + Expo for most startups.
Yes. We audit your current app, identify problems, and create a rebuild plan. Most apps need significant refactoring before they can scale.
Yes. We offer maintenance plans starting at $8K/month. Or we train your team and hand off completely.
Technical audit, due diligence gap analysis, rebuild roadmap, timeline estimate, and investment breakdown. If we work together, the $5,000 applies to your project.
That's our specialty. We've helped clients pass due diligence and close $27M+ in funding.
Book a strategy session. We'll audit your app for free and tell you exactly what needs fixing. You'll get a technical roadmap and timeline. If it's a fit, we start in 30 days.
No pressure. No sales pitch. Just honest advice from engineers who've done this 40+ times.
Book Strategy SessionIf we work together, the $5,000 applies to your project.