Hi, I'm

James Kirkham.

Founder & Full-Stack Engineer

I build and scale consumer apps from zero to millions of users. SelfQuest has reached 1.3M+ downloads and 100K daily active users — solo-founded and solo-built.

1.3M+ Downloads
100K Daily Users
72K TikTok Followers
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About Me

James Kirkham

Founder and full-stack engineer with a track record of building and scaling consumer apps to 1M+ users. I take products from idea to App Store — handling everything from UX design to cloud infrastructure.

Skilled in Flutter, Swift, React Native, C#, SQL, Supabase, and Azure. Experienced in product development, backend systems, and community-driven growth. Selected for Founders University accelerator and offered $25K investment by Jason Calacanis (declined).

6 Products Built
5+ Years Experience
3 Frameworks

Skills & Technologies

Mobile

Flutter
Swift
React Native
Dart
Kotlin

Backend & Data

C#
.NET / Blazor
SQL
Supabase
Azure
RESTful APIs
JWT Auth
Python
Node.js
Java

Web

React
JavaScript
HTML & CSS
TypeScript
Next.js

Tools & Platforms

Git & GitHub
Xcode
Azure DevOps
PostHog
AWS
Vercel
Firebase
Docker
Kubernetes
Microservices
Stripe

AI & Automation

AI / LLMs
RAG
MCP
Prompt Engineering
Vector DBs
Claude Code

Featured Projects

Apps and websites I've built — from concept to launch.

Mobile Apps

SelfQuest screenshot

SelfQuest

Gamified fitness tracker — 1.3M+ downloads, 100K DAU.

Flutter C# Azure
Screenshot

Nuremi

AI-powered concierge and interactive map application.

React Native Supabase
SelfAware screenshot

SelfAware

AI-first concierge and life OS app with agentic AI, RAG, and real-time streaming.

React Native Supabase OpenAI
SelfGrow screenshot

SelfGrow

Offline-first habit-breaking iOS app with social accountability and group challenges.

SwiftUI Supabase

Websites

selfquest.net
selfquest.net

SelfQuest.net

Landing page and marketing website for the SelfQuest app.

Web
yoursite.com
Coming Soon

Coming Soon

Another web project is on the way. Stay tuned.

Web

Experience

Mar 2024 — Present

Founder & Lead Engineer

Self Platform (SelfQuest, SelfAware, SelfGrow)

Building a platform of consumer apps focused on fitness, AI-powered personal assistance, and habit change. Solo-architecting and shipping across three frameworks (Flutter, React Native, SwiftUI) with independent backends.

  • SelfQuest — Gamified fitness tracker with 1.3M+ downloads and 100K DAU. Solo-built in Flutter/Dart with .NET 8 / ASP.NET Core backend on Azure. Real-time PvP multiplayer (SignalR), guild/social system, gamification engine, content moderation, ML Kit pose detection, RevenueCat monetisation, and PostHog analytics. Localised to 10+ languages. 16K Discord members, 72K TikTok followers.
  • SelfAware — AI-first concierge / life OS app in React Native (Expo/TypeScript) with Supabase backend. Agentic AI system using OpenAI Responses API with custom MCP tooling, RAG pipeline with pgvector embeddings, real-time streaming chat (SSE), multi-modal input (Vision, Whisper), and 5+ third-party API integrations (Amadeus, Ticketmaster, Google Places).
  • SelfGrow — Offline-first habit-breaking iOS app in SwiftUI with sync queue, network monitoring, and automatic local-to-cloud migration. Social accountability via Supabase Realtime, WidgetKit home screen widgets, Sign in with Apple (PKCE), and RevenueCat subscriptions.
Nov 2025 — Feb 2026

Lead Software Engineer & Technical Consultant

Nuremi

Built AI-powered concierge and interactive map application in React Native (Expo/TypeScript) with Supabase backend, powered by Anthropic Claude API with personality layer and multi-turn conversation context. Architected RAG pipeline with pgvector, integrated 5 Google Places API endpoints, and designed custom venue ranking algorithm with weighted scoring. Led all architecture decisions, UX design, and end-to-end implementation.

Oct 2022 — Oct 2024

Full Stack Software Engineer

Siemens

Developed manufacturing applications using C#, Blazor, .NET, and SQL Server to streamline production workflows. Built frontend UIs, RESTful APIs, and backend logic in an Agile team using GitKraken and Azure DevOps.

Aug 2021 — Sep 2022

Apprentice Support Engineer

J2 Innovations

Coordinated project tasks ensuring adherence to engineering standards and regulations. Managed internal bug tickets for users of the FIN Stack building management system (HVAC).

Education

Oct 2024 — Feb 2025

Founders University

Competitive 12-week accelerator. Offered $25K for 2.5% equity by Jason Calacanis (declined).

Nov 2022 — Oct 2024

Ada College of Technology

Computer Engineering Apprenticeship/Degree (2 years completed).

Recognition

1.3M+ Downloads

Solo-founded SelfQuest to 1.3M+ downloads, demonstrating end-to-end product capability from UX to cloud deployment.

Founders University

Selected for competitive 12-week accelerator. Offered $25K investment by Jason Calacanis — declined to maintain full ownership.

Press Coverage

Featured in TechTudo (Globo, Brazil) — "SelfQuest: the fitness app for gamers that combines gaming and exercise".

Blog

Thoughts on development, design, and building products.

Coming Soon

How I Scaled SelfQuest to 1.3M Downloads

The technical and growth story behind building a solo app to over a million users.

Read More →
Coming Soon

Flutter vs React Native vs Swift

Lessons learned from building production apps in all three — when to use what.

Read More →
Coming Soon

Building Community-Driven Growth

How TikTok and Discord became the growth engine for a fitness app.

Read More →

Get In Touch

Have a project in mind or just want to chat? I'd love to hear from you.

LinkedIn

Connect with me