Full-stack product engineer

I build SaaS products
from zero to production

Database design, API architecture, UI components, payment integrations, and AI features — built end-to-end and shipped.

View case studiesGet in touch

Portfolio

Stephen Carew

GitHubLinkedIn

Projects shipped

8+

Lines of TypeScript

50k+

Smart contracts

5

Core stack

Next.jsTypeScriptPostgreSQLSupabaseStripeSolanaPythonPrismaTailwindRedis

Recent

Tenora SaaSActive
Plume MarketplaceNew
RestauranterComplete

Technical expertise

What I work with

Tools and technologies I use to build and ship production applications, from database schema to deployed product — across web, mobile payments, blockchain, and bot ecosystems.

Frontend Architecture

React / Next.js (App Router)Expert
TypeScript (strict mode)Expert
Tailwind CSS v4 + shadcn/uiExpert
Framer MotionExpert
TanStack Query v5Advanced

Backend & Data

PostgreSQL + SupabaseExpert
Prisma + Drizzle ORMExpert
Express.js + Node.jsAdvanced
Redis + UpstashAdvanced
Vercel Blob / Edge StorageIntermediate

Payments & Real-time

Stripe (subscriptions + payments)Advanced
M-Pesa API IntegrationAdvanced
Plaid + TrueLayer (Open Banking)Advanced
Server-Sent Events (SSE)Advanced
OpenAI / DeepSeek APIAdvanced

Blockchain & Web3

Solana (Web3.js / Anchor)Advanced
Smart Contract DevelopmentAdvanced
Metaplex (Bubblegum / cNFTs)Advanced
SPL Token StandardsAdvanced
Wallet Adapter IntegrationAdvanced

Bot Development & Python

Discord Bot ArchitectureExpert
Python + interactions.pyAdvanced
MySQL + SQLite PersistenceAdvanced
BIP-39 Seed ManagementIntermediate
GitHub Actions / CI/CDIntermediate

Case studies

Selected work

Deep dives into complex technical challenges, architectural decisions, and measurable outcomes.

SaaS2026

Tenora — UK Property Management SaaS

A full-featured property management platform for UK landlords. 110+ features, 5-tier SaaS billing, AI-powered tenant messaging, clause-level contract negotiation, and Stripe + Open Banking rent collection — all built solo.

Next.js 16TypeScriptSupabasePostgreSQLStripeTailwind CSSTanStack QueryOpenAIPlaidTrueLayer
Blockchain & Web32025

Plume — Trait Marketplace

A full-stack Solana-based platform enabling users to customize their NFTs through overlays and trait upgrades, with an admin dashboard controlling trait economics and user interactions.

Next.js 15React 19Tailwind CSSFramer MotionExpress.jsTypeScriptPostgreSQLPrismaVercel BlobSolana Web3.jsMetaplex Bubblegum
SaaS2025

Restauranter — Restaurant Management

All-in-one platform for customers, staff, and managers enabling seamless restaurant operations with QR code ordering, live status tracking, and M-Pesa payment support.

Next.js 15Tailwind CSSRadix UIFramer MotionPostgreSQLPrismaRedisServer-Sent EventsM-Pesa API
Web Applications2025

Car Parts Finder Enterprise

A multi-tenant marketplace connecting auto parts stores with customers. Real-time inventory sync, vehicle compatibility search (Make/Model/Year), and role-based access for store owners, staff, and buyers.

Next.js 14TypeScriptDrizzle ORMPostgreSQLNextAuth.jsTailwind CSS
Blockchain & Web32024

Dummified Labs — Gamified Staking

A gamified Solana NFT staking experience where users stake NFTs to earn rewards, complete quests, and level up through team or solo events.

SolanaAnchorRustNext.jsReactTypeScriptPostgreSQLPrismaTheme UISPL TokensMetaplex Bubblegum
Blockchain & Web32024

Dummified Labs — NFT Trait Marketplace

A Solana marketplace where NFT holders buy, sell, and apply modular traits to their existing tokens — adding customization layers without modifying the original collection.

Next.jsTypeScriptSolanaAnchorRustTailwind CSS
Bots & Automation2023

Discord Bot Ecosystem

A suite of Python Discord bots handling Solana wallet verification, a battle royale mini-game, and community management — running across 50+ servers with SQL-backed persistence.

PythonDiscord.pySolana SDKMySQLRedisinteractions.pyBIP-39

Academic background

Education & research

Academic background and ongoing research in advanced engineering systems.

Instrumentation and Control, MSc

Current

United Kingdom

Specializing in advanced control systems, industrial automation, and distributed sensor networks. Research focused on real-time data processing and system reliability.

Control SystemsAutomationIoTData Processing

Electrical and Electronics Engineering, BSc Hons

Graduated

Australia

Foundation in circuit theory, digital electronics, and signal processing. Developed strong analytical and problem-solving skills applied to hardware-software integration.

Circuit DesignDigital ElectronicsEmbedded SystemsSignal Processing

Get in touch

Let's work together

Have a project in mind? I'd love to hear about it. Let's discuss how we can bring your ideas to life.

Get in touch

I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology and innovation.

Connect with me

Send me a message

Fill out the form below and I'll get back to you as soon as possible.