Reliable web and mobile apps for startups and product companies by Alexey Sobolev

Reliable web and mobile apps for startups and product companies

Alexey Sobolev

Contact for pricing

About this service

Summary

I’m here to help you stop guessing what to build and give you a step-by-step plan. Instead of just advice, I help you plan, architect, and ship .NET/React/SaaS products so you see real progress. Whether you’re starting from a prototype or stuck scaling, I’ll provide a clear foundation to launch, grow, and hand off to your team, keeping your SaaS roadmap, .NET services, and React UI aligned.

I build SaaS platforms that raised $1B+, reached 450,000+ users, and shipped products featured on the Inc. 5000®.

What's included

SaaS & Web App Development
I build MVPs and scale SaaS platforms using .NET, React, C#, Python/FastAPI, PostgreSQL/MSSQL.
Backend & APIs
Reliable and secure server-side solutions that handle operations efficiently, even as demands increase. .NET/C#, Python/FastAPI, REST/GraphQL, Entity Framework, PostgreSQL, MSSQL, MongoDB, WebRTC when real-time is required.
Frontend Engineering
I use React UI and React/Next.js for dashboards and portals, TypeScript, Vite, and Blazor when needed.
Mobile App Development
I use .NET MAUI for cross-platform, Swift for native iOS, and reuse your APIs across mobile and web.
Payments & Integrations
Stripe for subscriptions and SaaS billing, PayPal, HubSpot, ActiveCampaign, Microsoft Dynamics 365, Twilio, WhatsApp, Shopify, WooCommerce, Zapier, ChatGPT/OpenAI.
Product Partnership
I will help you grow your team as the product scales. Research, documentation, QA, plan roadmaps, long-term support

Example projects