Transform Your Ideas Into Digital Reality
Custom web and mobile applications built by a DevOps engineer with 17 years of enterprise experience. End-to-End Custom Solutions for your digital needs.
Our Services
From idea to launch, we've got you covered.
MVP Development
Quick prototypes to validate your concept
Full-Stack Web Apps
Complete web applications with modern frameworks
Mobile Applications
Native and cross-platform mobile solutions
Enterprise Integration
Email, SMS, WhatsApp, authentication, payments
DevOps & Hosting
Domain registration, hosting, deployment automation
Ongoing Support
Maintenance and feature updates
Our 4-Step Process
A streamlined path to success: Dream, Design, Develop, Deliver.
17 Years of Enterprise IT Experience
Leveraging a deep understanding of enterprise-grade systems to build robust, scalable, and secure applications.
- Enterprise Support
- Implementation Engineering
- Professional Services
- DevOps Engineering
Our Guarantee
"Every feature works, every app is stable and available."
This isn't just a promise; it's the standard we hold for every line of code we write and every system we deploy. Your peace of mind is our top priority.
Our Recent Work
A showcase of our successfully delivered projects. Each one is a testament to our commitment to quality, innovation, and client satisfaction.
E-commerce Platform MVP
A fully functional MVP for a new online marketplace.
Healthcare Scheduling App
A mobile application for booking medical appointments.
Financial Dashboard
A web application for visualizing complex financial data.
About Sergey Zakharenko
From maintaining massive enterprise systems to building agile applications from scratch, my journey has been driven by a passion for making technology work flawlessly.
After 17 years in DevOps and enterprise support, I saw a recurring gap: businesses struggled to find developers who not only write code but also understand the entire lifecycle of a digital product—from infrastructure and deployment to long-term stability. I founded 4D by SZ to bridge that gap, offering a holistic development service that combines deep technical expertise with a founder's mindset.
Our Pricing Philosophy
Transparent, flexible, and built for value.
Flexible Scoping
From MVP demos to production-level applications.
Competitive Rates
Professional quality at below-market pricing.
Custom Solutions
Fully tailored to your specific needs and budget.
What Our Clients Say
Real stories from satisfied partners.
""Working with Sergey was a game-changer. Our MVP was delivered on time and exceeded all expectations.""
CEO, Startup Inc.
""The level of professionalism and technical expertise is unmatched. Highly recommend for any complex integration project.""
Product Manager, Tech Corp.
""Finally, a developer who understands both the code and the business goals. The entire process was seamless.""
Founder, E-Shop
Ready to Build Something Amazing?
Fill out the form below to get your free consultation. Let's discuss your project and how we can bring your vision to life.