How long does a typical project take?

Most MVPs ship in 4–8 weeks. Larger platforms run 3–4 months, delivered in weekly increments so you see progress the whole way through. We'll give you a concrete timeline after discovery.

How do you price your work?

We offer fixed-scope project pricing and monthly retainers. Our plans below are starting points — after a short call we'll tailor a quote to your exact scope and budget.

Do you work with early-stage startups?

Absolutely. A large part of our work is taking founders from idea to a fundable, production-grade MVP — fast, and without cutting corners on quality.

Who owns the code and designs?

You do. On final payment, you receive full ownership of all source code, design files, and assets. No lock-in, no surprises.

What tech stack do you use?

We favor Next.js, React, TypeScript, Go, Rust, Laravel, React Native, and modern cloud infrastructure (PostgreSQL, Redis, Docker, Kubernetes, AWS, Google Cloud, Vercel) — chosen so your in-house team can maintain and scale everything with ease.

Can you work with our existing team?

Yes. We can embed with your designers and engineers, augment specific gaps, or run the whole build — whatever gets you to the outcome fastest.

What happens after launch?

We offer ongoing support and iteration plans for maintenance, new features, and performance. Many clients keep us on as a long-term product partner.

How do we get started?

Send us a message through the contact form below. We'll reply within one business day and set up a free 30-minute discovery call.

NewAI product engineering, end-to-end

We design & build digital products that feel inevitable.

Callum C is a product studio for teams who refuse to ship average. From MVP to enterprise scale — beautifully designed, expertly engineered, and shipped fast.

See our work

4.9/5 from 40+ teams

app.callumc.id

Revenue+18%

$128.4k

Active users+9%

24,918

Conversion+2.1%

6.4%

Growth

Last 12 months

Live

Deploy successful

Shipped in 6 weeks

Lighthouse 98

Core Web Vitals

Built with a modern stack

Next.jsReactTypeScriptLaravelGoRustNode.jsPythonGraphQLReact NativeFlutterTailwind CSSPostgreSQLMongoDBRedisSupabaseFirebaseDockerKubernetesTerraformVercelAWSGoogle CloudNext.jsReactTypeScriptLaravelGoRustNode.jsPythonGraphQLReact NativeFlutterTailwind CSSPostgreSQLMongoDBRedisSupabaseFirebaseDockerKubernetesTerraformVercelAWSGoogle Cloud

What we do

Everything you need to ship,
under one roof

Strategy, design, and engineering as a single accountable team — so nothing gets lost in the handoff.

Web Development

Blazing-fast, SEO-ready websites and web apps built on Next.js, React, and modern edge infrastructure.

Next.js
React
Vue
Vite
TypeScript
Tailwind CSS
Laravel
Blade
PHP
Node.js
Go
Rust
GraphQL

Mobile Apps

Native-feeling iOS & Android apps from a single codebase, with delightful motion and offline support.

React Native
Flutter
Expo
Swift
Kotlin
Firebase

UI/UX Design

Research-driven product design that turns complex flows into interfaces people love to use.

Figma
Prototyping
Design systems

Branding

Identity systems — logo, type, color, and voice — that make your product feel unmistakably yours.

Identity
Guidelines
Motion

SaaS Development

Multi-tenant platforms with billing, auth, dashboards, and analytics — architected to scale from day one.

Go
Rust
PostgreSQL
Redis
Stripe
Docker
Kubernetes
AWS

AI Integration

Ship AI features that matter — assistants, search, and automation powered by the latest models.

LLMs
RAG
Agents
Python
Go
Rust

MVP Development

Go from idea to a fundable, production-grade MVP in weeks — validated fast, built to grow.

0→1
Rapid build
Validation
Supabase
Firebase
Vercel

Have something else in mind?

Tell us about your product — we'll shape the right scope, team, and timeline for it.

Let's talk

Why Callum C

The upside of a senior team that actually cares

We optimize for your outcomes, not our hours. Here's what that means for you.

Ship in weeks, not quarters

A lean senior team and a battle-tested toolkit mean you launch faster — without cutting corners on quality.

Design-led engineering

Designers and engineers work as one. Every pixel is intentional and every interaction feels effortless.

One team, end-to-end

Strategy, design, and code under one roof. No handoffs, no finger-pointing — just accountable delivery.

Built to scale

Clean architecture, strong typing, and tested code you can hand to your in-house team without regret.

Radically transparent

Live previews, weekly demos, and a shared board. You always know exactly where your product stands.

Partners, not vendors

We think in outcomes, not tickets. Most clients stay with us long after launch — 98% and counting.

How we work

A proven path from idea to launch

A transparent, six-step roadmap that keeps you in the loop and momentum high — every single week.

Step 01

Discovery

We align on goals, users, and scope — then turn ambiguity into a clear, prioritized roadmap.

Step 02

Design

Wireframes to polished, interactive prototypes. You see and feel the product before we build it.

Step 03

Development

Clean, typed, well-tested code shipped in weekly increments you can review at every step.

Step 04

Testing

Automated and manual QA across devices, plus performance and accessibility audits before launch.

Step 05

Launch

Zero-downtime deploys on modern edge infra, with monitoring and analytics wired in from day one.

Step 06

Support

Ongoing iteration, maintenance, and a partner on call — we grow the product alongside you.

Selected work

Products we're proud of

A glimpse of what we've shipped with founders and teams across the globe.

Start yours

+180% activation

Fintech · SaaS

Fintrail

A personal-finance platform with real-time insights and open-banking sync.

Next.js
Stripe
Charts

4.9★ App Store

Mobile · Travel

Nomad OS

An all-in-one travel companion with offline maps and smart itineraries.

React Native
Maps
AI

−72% booking time

Healthcare · Web

Atlas Health

A patient portal that cut booking time from days to minutes for 40k users.

Web
HIPAA
Design system

12k+ teams

AI · SaaS

Lumen AI

An AI writing assistant with RAG search over private company knowledge.

LLMs
RAG
Agents

+34% revenue

E-commerce · Web

Cobalt Commerce

A headless storefront that loads in under a second and converts like crazy.

Headless
Edge
Payments

2× inbound leads

Branding · Web

Vertex Studio

A full rebrand and marketing site for a fast-growing design agency.

Branding
Motion
CMS

Pricing

Simple pricing for web & app builds

Transparent starting points for both web and mobile products. Explore the full plans and find the tier that fits.

Web development

Marketing sites, web apps, dashboards, and SaaS platforms.

from$2,900

View full pricing

App development

Native & cross-platform mobile apps for iOS and Android.

from$4,900