Ship production software faster.
We're a boutique dev agency that builds modern web and mobile applications. Expert team, rapid delivery, production-ready code.
Expertise
Technologies we specialize in
Backend
Elixir
Scalable, fault-tolerant systems built on the BEAM VM. Perfect for APIs, distributed systems, and high-concurrency applications.
Full-Stack
Phoenix LiveView
Real-time web applications without complex JavaScript. Build interactive interfaces with server-rendered HTML and WebSocket magic.
Marketing Sites
Astro
Lightning-fast static sites with perfect Lighthouse scores. SEO-optimized, content-focused, and built for conversions.
Mobile
iOS Development
Native Swift applications for iPhone and iPad. App Store deployment with SwiftUI and modern iOS patterns.
Why Cobalt Sentry
Experience meets modern delivery
- 20+ Years Shipping Software
- Elixir, Phoenix, Swift, and Astro in production. Not a generalist shop that Googles your stack after the contract is signed.
- Fixed-Price, No Surprises
- You know the cost before we write a line of code. No hourly billing, no scope creep invoices, no "we need another sprint."
- You Own Everything
- Full source code, deployment credentials, and documentation on handoff. No lock-in, no retainer required to keep the lights on.
Process
How we work
A proven process refined over 20 years of delivering production software.
- 1
Discovery
We start with a detailed consultation to understand your goals, technical requirements, and project constraints. This ensures we're aligned from day one.
- 2
Build
Rapid development using modern frameworks and AI-assisted tooling. You'll see working prototypes quickly with regular progress updates throughout.
- 3
Deliver
Thoroughly tested, documented, and deployed. You receive production-ready code with clear handoff documentation and deployment support.
Services
Fixed-price packages
Clear deliverables, fixed pricing, no surprises.
Fixed-Price, 30-Day Delivery
MVP Development
Launch your product in 30 days. Rapid MVP development for founders who need to validate ideas quickly without a full engineering team.
Fixed-Price Engagement
API Development
Production APIs that handle real traffic. REST or GraphQL, fully documented, tested, and deployed with monitoring included.
Fixed-Price Engagement
Process Automation
Eliminate manual, repetitive tasks. Custom automation solutions that save time, reduce errors, and increase productivity.
Ready to start your project?
Get in touch to discuss your needs and receive a detailed project proposal within 24 hours.
Start Your Project
Tell us about your project and we'll get back to you with a tailored proposal.