About Sumtek Solutions

AI-driven development for select engagements — from concept to production.

From IT Consulting to AI Engineering

Sumtek Solutions started as a general IT consulting practice — troubleshooting servers, configuring networks, helping businesses keep their technology running. It was good work, but the landscape shifted.

AI changed everything. Not the hype cycle version of AI, but the practical reality: language models that can process documents, agents that can execute workflows, and protocols like MCP that let AI tools interact with real business systems. This is the work that matters now.

Today, Sumtek Solutions focuses on AI-driven application development. I build the servers, APIs, agents, and applications that let businesses actually use AI — not just talk about it. Every project ships to production with documentation, tests, and infrastructure included.

The name "Sumtek" comes from "Sum" (total) + "tek" (tech). The idea was always about bringing the full picture together. That hasn't changed — just the tools I use to do it.

Founder & Lead Engineer

Josh Preston

Full-stack engineer who builds production software from infrastructure to interface — using AI-driven development to ship faster and smarter.

I've shipped fintech platforms with cross-platform mobile and web apps, e-commerce systems with integrated payment processing, SaaS applications with secure authentication including OAuth and passkeys, and cryptocurrency payment integrations — all deployed and running in production. My stack centers on Go for backend services, TypeScript and Dart for frontends, Terraform for AWS infrastructure-as-code, and Cloudflare for edge deployment.

When you work with Sumtek, you work directly with me. No project managers, no junior developers. You get a senior engineer who understands both the technical implementation and the business context.

Based in Idaho. Available for select remote engagements.

Technical Expertise

Languages

GoTypeScriptDartPythonJavaScript

AI-Driven Development

Claude APIAnthropic SDKMCP ProtocolAI AgentsRAGPrompt Engineering

Frontend

FlutterSvelteTailwindCSSHTML/CSSVite

Backend

chi (Go)Gin (Go)Cloudflare WorkersNode.js

Databases

PostgreSQLRedisSQLite

Infrastructure

AWSTerraformDockerCloudflareGitHub Actions

Platforms

WebiOSAndroidServerless

Crypto & Payments

BitcoinLightning NetworkExchange APIsPOS IntegrationSquare API

How We Work

Ship to Production

Every project is deployed, documented, and production-ready. I don't hand off prototypes and call it done. You get working software that runs in the real world.

You Own Everything

Full source code ownership, complete Git history, and thorough documentation. No vendor lock-in, no proprietary platforms, no ongoing dependencies.

Fixed Prices, Defined Scope

I quote fixed prices for defined work. You know exactly what you're paying before I start. Scope changes are handled through a transparent change order process.

Direct Communication

You communicate directly with the engineer building your project. No intermediaries, no telephone game. Questions get answered fast and accurately.

Security First

Every application is built with security as a core requirement, not an afterthought. Encrypted data, authenticated APIs, input validation, and OWASP-aware development practices.

Practical, Not Flashy

We build solutions that work and deliver ROI. No unnecessary complexity, no over-engineering, no technology for technology's sake. The right tool for the right problem.

Have a project in mind?

Reach out and I'll let you know if it's a fit.

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