Technical Partner for Web Apps and Shopify Stores That Actually Scale
We help founders and eCommerce brands eliminate technical debt, protect their margins, and build infrastructure that scales — with senior engineering at every level.
You've got the vision. Maybe even the team.
But you're stuck dealing with missed deadlines, buggy builds, slow sites, or developers who "almost" get it done.
Sleek App is the technical partner that protects your margins, cleans up your stack, and builds the infrastructure your growth depends on.
9+ years building web apps, websites, and Shopify experiences — from startups to Fortune 500 work.If any of this sounds familiar, you're in the right place:
You have an app/store idea… but no technical partner to build it.
You can build it… but you don't have the time (and your backlog keeps growing).
You hired developers before — and the results were late, messy, and expensive to redo.
Your current site/store works… but it's slow, buggy, or hard to maintain.
You want expert guidance on security, performance, stack choices, and Shopify best practices — not generic advice.
The cost isn't just technical.
It's lost revenue, missed launches, stressed teams, and a product you can't confidently scale.
A Technical Partner Who Protects Your Margins
Most agencies sell you hours.
We sell you clarity, execution, and outcomes.
Whether you're starting from zero or improving an existing product, you get:
Senior technical leadership (not "junior dev roulette")
Fast, clean delivery with quality you don't need to babysit
Clear communication (no jargon, no mystery, no ghosting)
Systemized updates so you always know what's done, what's next, and what's blocked
What we help you do
Full-Stack Web App Development (MVP → Scale)
Build your product the right way the first time — with a stack that won't trap you later.
Ideal for: founders, internal tools, SaaS MVPs, dashboards, marketplaces.
Typical outcomes:
MVP built to launch quickly without spaghetti code
Stable backend + clean frontend
A roadmap you can actually execute
Shopify Technical Partner (Performance, Strategy, Scale)
We eliminate the technical debt that inflates your CAC — and build the infrastructure your growth depends on.
We help with:
Custom sections, themes & Shopify apps
Performance optimization to lower bounce rates
App stack consolidation to cut costs
Technical strategy and advisory
Fixes, Features, and Performance (Existing Projects)
Already have a site/app/store? We jump in, clean it up, and move it forward.
We help with:
Bug fixing + cleanup
Speed optimization (Core Web Vitals)
Feature development
Security best practices + hardening
Tech debt reduction
Technical Consulting (When you need certainty)
If you're making high-stakes decisions, we help you avoid expensive mistakes.
We help with:
Best stack for your product
Architecture and scalability guidance
Shopify strategy and implementation
Security reviews and practical improvements
Tooling + API recommendations
Tech that's proven — and chosen for speed + maintainability
We specialize in a modern stack that helps you ship fast and scale cleanly:
React • TypeScript • Node.js • SQL/NoSQL • AWS • GraphQL (when it fits)
And if your project needs something else?
We'll recommend what's best for your goals — not what we're biased toward.
What clients say (and why it matters)
"The Lead Developer was one of the best frontend developers I have ever worked with. Easy to trust. Strong ownership. Delivered what they committed to."
— Silostack
"Extremely professional in communication and ownership of tasks. Quick to take direction and run with it to efficiently produce high-quality work."
— David Witwer
"Very pleased to have worked with Sleek App. The team was able to quickly grasp the requirements of our complex project and deliver the initial deliverables in good time."
— Coulter Peterson
If you've been burned by developers before, these are the two things clients mention most: ownership and clarity.
Case Study: Interactive 2D Board Game UI (React)
The challenge
A zoomable, selectable board game experience with precise interaction — the kind of UI that breaks easily if the engineering isn't solid.
What we did
Built a clean interaction model for selecting zones
Implemented smooth zoom / pan (including pinch behavior)
Kept the codebase maintainable (so future features don't become a rewrite)
What working together looks like
Quick discovery
(goals, constraints, current state)
Clear plan & estimate
(scope, milestones, risks)
Build + weekly check-ins
(you always know progress)
QA + launch support
(finish strong, not "good luck")
Tell us what you're building (or fixing)
Whether you need a full build, improvements, or expert guidance — send the details and we'll reply with next steps.
What you'll get back:
- A clear recommendation
- A realistic timeline
- And whether we're a fit (we'll tell you straight)
Looking for: Web app development, Shopify technical partner, Shopify speed optimization, performance infrastructure, app stack consolidation, or full-stack technical consulting?
Sleek App is your technical partner for eliminating technical debt and building the infrastructure that supports growth — backed by 9+ years of senior engineering.