01
Mobile
apps
Complex logic, intuitive interfaces and integrations. Apps with equal care for what users see and what happens behind the screen.
YOUR PRODUCT, IN YOUR POCKET ↗
Complex challenges.
Clean solutions.
I turn ideas into apps and websites.
From the first line of code to a working
product on your server.
ENGINEERING MINDSET. PERSONAL ACCOUNTABILITY.Scroll down ↓
01 / EXPERTISEFROM IDEA TO INFRASTRUCTURE
Your product.
The whole system.
Interface, logic and infrastructure should
work together. I handle the technical side,
so you can focus on your idea.
Mobile
02
Websites
& web systems
From a personal website to a complex web app. I build interfaces, server logic and integrations with external services.
MORE THAN JUST PAGES ↗
03
Hosting
& backend
Hosting for websites and application backends. Environment setup, launch and ongoing infrastructure support for your project.
A SOLID FOUNDATION FOR YOUR PRODUCT ↗
04
Troubleshooting
& performance
I troubleshoot failures in websites, apps and servers. I fix slow, large websites and databases by optimizing code, SQL queries, indexes and caching.
LESS LATENCY. MORE STABILITY. ↗
05
Cloud
& scaling
I scale projects on cloud platforms with load balancing, distributed services and infrastructure configured for growing traffic. I also handle migration and ongoing support.
INFRASTRUCTURE BUILT FOR GROWTH ↗
06
AI integration
in your product
I integrate AI into apps and websites: assistants, text and image processing, and workflow automation. I connect models to your product’s data and features.
AI FOR REAL TASKS ↗
07
Security
& encryption
Information security for websites, apps and servers. Vulnerability checks, access configuration, TLS/HTTPS and encryption for data at rest and in transit.
PROTECTING SYSTEMS & DATA ↗
08
Recovery
& malware removal
I help recover data, websites and databases after failures or infections. I remove malware, viruses and malicious injections, identify the cause of the incident and help prevent reinfection.
GETTING YOUR PROJECT BACK ONLINE ↗
CONNECTING YOUR SYSTEMS
Integrations & project development
API, CRM & ERP
Data exchange between services, business workflow automation and integrations with analytics and advertising systems.
Telephony & communications
VoIP, SIP, Asterisk and FreePBX. Telephony integrations with apps, websites and business systems.
Existing websites & eCommerce
Extending and maintaining WordPress, WooCommerce and OpenCart. Migrations, integrations and technical troubleshooting.
TECHNOLOGIES I WORK WITH
Flutter / Dart · PHP / JavaScript / Symfony · MySQL / MSSQL · C# / .NET · VoIP / SIP / Asterisk
02 / SELECTED WORKPRODUCTS & REAL CHALLENGES
Ideas that
are already live.
Mobile products, web services
and challenges beyond the interface.
View project ↗RecMe ↗
Find specialists and services through recommendations from phone contacts. Share trusted contacts and create your own business card in one app.
View project ↗YaTut’Ye ↗
A messenger with an independent ID, messaging, voice and video calls. Direct P2P connections, a social network and AI tools within the app.
More from my work
WORK ON UPWORKWebsite migration to DigitalOcean
Sites migration to digital ocean
Telegram ↔ SIP
Telegram voice SIP gateway
MySQL troubleshooting
Mysql too many connections
03 / CLIENT REVIEWSPUBLISHED ON UPWORK
My work —
in my clients’ words.
My Upwork profile ↗★★★★★5.0 / UPWORK
“A+++++++ Viktor has been the single best resource we have ever worked with on Upwork. His knowledge is deep and varied.”Read at source ↗★★★★★5.0 / UPWORK
“Excellent work completed! I really appreciated his patience. I've already made plans to hire him again.”Read at source ↗★★★★★5.0 / UPWORK
“He solved the problem with good judgment and knowledge.”Read at source ↗★★★★★5.0 / UPWORK
“…solved a problem on the server…”Read at source ↗★★★★★5.0 / UPWORK
“Viktor was quick to understand our multitude of issues…”Read at source ↗★★★★★5.0 / UPWORK
“he did good work”Read at source ↗01 / 06
Excerpts from Upwork reviews. Full reviews are available on my profile.
04 / APPROACHTHE PERSON BEHIND THE CODE
You talk directly
to the person writing the code.
I’m Viktor Sarbash. I develop websites and complex mobile apps, build backends and help projects keep running after launch.
01 / UNDERSTAND
The problem first. Technology second.
We discuss your idea, users and constraints, then define what the product really needs.
02 / BUILD
From architecture to details.
I connect the interface, data and business logic into one working system.
03 / LAUNCH
Code is just the beginning.
I deploy the project, configure the backend and help with its continued development.
05 / NEW CONNECTION LET’S CONNECT
Have an idea?
Let’s launch it.
Tell me what you’d like to build.
We’ll discuss the challenge and the next step.
> awaiting_your_idea_