You will get full stack developer to build the back end on your SaaS MVP | Node.JS
Top Rated
Project details
You need a reliable partner for robust SaaS MVP back end development and a comprehensive server audit. You need a dedicated back end developer and full stack developer mastering SaaS architecture across React, Java, and .NET.
We take startups from "Zero to One" with tailored SaaS MVP back end development. Every full stack developer and back end developer acts as your technical co-founder. We excel at secure SaaS data foundations, rigorous server audits, and scalable architectures using React, Java, and .NET for your MVP.
Why choose us?
Backend Experts: Every back end developer and full stack developer ensures strict compliance in Java, .NET, and React for your SaaS.
Scale & Server Audits: We build and audit SaaS stacks. Whether optimizing a Java monolith, a .NET database, or a React UI, your back end developer and full stack developer guarantee peak performance post-server audit.
100% IP: You own all React, Java, and .NET code built by your full stack developer and back end developer. No SaaS lock-ins.
ROI-First: Your full stack developer and back end developer prioritize core MVP features.
Let's start your SaaS MVP back end development and server audit!
We take startups from "Zero to One" with tailored SaaS MVP back end development. Every full stack developer and back end developer acts as your technical co-founder. We excel at secure SaaS data foundations, rigorous server audits, and scalable architectures using React, Java, and .NET for your MVP.
Why choose us?
Backend Experts: Every back end developer and full stack developer ensures strict compliance in Java, .NET, and React for your SaaS.
Scale & Server Audits: We build and audit SaaS stacks. Whether optimizing a Java monolith, a .NET database, or a React UI, your back end developer and full stack developer guarantee peak performance post-server audit.
100% IP: You own all React, Java, and .NET code built by your full stack developer and back end developer. No SaaS lock-ins.
ROI-First: Your full stack developer and back end developer prioritize core MVP features.
Let's start your SaaS MVP back end development and server audit!
Programming Languages
JavaScript, ASP.NET, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$1,750
|
Standard
$12,000
|
Advanced
$27,500
|
|---|---|---|---|
| Delivery Time | 7 days | 25 days | 55 days |
Number of Revisions | 1 | 2 | 4 |
Design Customization | - | - | |
Content Upload | - | ||
Responsive Design | |||
Source Code |
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OM
Oleksii M.
Apr 20, 2026
Senior Full Stack Developer, Software Architect (SaaS, .NET, React, Rust)
We enjoyed working with Serhiy on our solution architecture technical audit and code review, he helped our team to identify technical design issues and improve it, also suggested cool engineering AI tools for our dev team, so we highly recommend him and will be happy to work again.
VP
Viktoria P.
Nov 25, 2025
Java Developer with experience in Spring, Kubernetes and Hibernate on AWS
Working with Serhiy and the Genius team was a game-changer for our complex Java project! They delivered every feature on time, kept communication crystal clear, and even elevated our solution architecture. Highly recommended — we’d gladly team up again!
JB
Jordi B.
Jun 19, 2024
Senior Rust Developer
JB
Jordi B.
Jun 19, 2024
Rust developer
OM
Oleksii M.
Dec 29, 2023
Senior Full-Stack Developer (C#, Angular)
We very enjoyed working with Genius team on our web-app project and they helped our team to deliver this project within the deadline. All new features were delivered as planned using clear communication, they also helped with the solution architecture improvements so we highly recommend this team and will be happy to work again, thanks guys!
About Serhiy
Full Stack Developer | AI Integrations | SaaS | React | Node | .NET
100%
Job Success
Warsaw, Poland - 7:14 pm local time
⭐ Certified full stack developer, react developer, software developer, & saas developer Top Rated+ | 🏆 100% full stack developer Success for every SaaS contract utilizing React, vue, angular, Node.js, Python, golang, and Rust | ⭐ 5-star Rating for web, mobile app developer projects, AI, Web3 via solana, and SaaS | 💰 $300K+ earned delivering excellence as an elite full stack developer, web developer, software developer, and wordpress developer. My Python, JavaScript, .NET, golang, and PHP web solutions are built to scale globally and accelerate your saas sales and saas marketing efforts as a premier full stack developer and mobile app developer.
⭐ Extensive full stack developer and software developer expertise across web, mobile, and SaaS platforms. I serve as a complete full stack developer, web developer, Back End Developer, and saas developer, seamlessly integrating AI models and Web3 components (including solana smart contracts) into robust web systems. My technical arsenal for full stack developer projects includes the MERN stack using React and Node.js (excelling as a lead react developer), modern frontend frameworks like vue and angular, enterprise-grade .NET and golang Web APIs, scalable CMS platforms as a wordpress developer, and memory-safe Rust modules for solana ecosystems. By combining core JavaScript, advanced React, vue, and angular ecosystems, scalable Node.js and golang microservices, stable PHP databases, and smart AI features, I deliver exactly what every client wants from a top-tier full stack developer, cross-platform mobile app developer, software developer, and Back End Developer. Whether architecting a new SaaS platform in .NET, optimizing core financial engines in Rust or golang, deploying a custom theme as a wordpress developer, boosting technical infrastructure for saas marketing and saas sales, or scripting in Python for complex data processing, my full stack developer and saas developer approach covers all web and AI requirements.
🤖 Solid full stack developer and software developer experience across various high-load SaaS domains (Finance, PropTech, HRTech, Travel, eCommerce) relying heavily on flawless custom full stack developer execution. I thrive specifically as a dedicated React full stack developer, react developer, Node.js Architect, elite Back End Developer, and strategic saas developer, seamlessly blending AI performance, golang APIs, and Rust (including solana blockchains) into traditional SaaS workflows. My background as a full stack developer, web developer, and mobile app developer means I confidently utilize Python, golang, and Rust for heavy FinTech data analytics, .NET and PHP for robust eCommerce SaaS web portals, versatile CMS setups as a wordpress developer, and modern JavaScript, vue, angular, and React for interactive PropTech web dashboards.
🔥 Certified full stack developer Engineering and Solution Architect Expert (Ph.D. CS, PMP, CSP, CSM, CSPO, ICP-PPM, MCP). I deliver Agile/Scrum SaaS solutions as a lead full stack developer, dedicated react developer, software developer, and saas developer focused on web, AI, React, vue, angular, Rust, solana, golang, and .NET innovation. Managing cross-functional teams as a full stack developer, I ensure strict coding best practices across dynamic React, vue, and angular UIs, iOS/Android builds guided by a senior mobile app developer, Node.js, golang, and PHP backends, Web3 solana integrations, legacy .NET migrations, bespoke CMS builds managed by a wordpress developer, and sophisticated Python integrations designed to maximize your saas sales and saas marketing ROI. Every SaaS interface, web module, and Back End Developer component I architect meets the rigorous standards expected from a master full stack developer, saas developer, and web developer utilizing JavaScript and Rust.
*Last Updated: 26.06.2026
Steps for completing your project
After purchasing the project, send requirements so Serhiy can start the project.
Delivery time starts when Serhiy receives requirements from you.
Serhiy works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Strategy
We analyze your requirements, define the user flow, and select the right tech stack.
Architecture & Design
We create the database schema and wireframes (or review yours) to ensure stability.