You will get Discovery Phase for your tech solution
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Project details
Before diving into development, it's crucial to ensure your project has a solid foundation. I offer detailed discovery services that include requirements gathering, technical feasibility analysis, and project scoping. Together, we'll define clear goals, outline the scope, and create a roadmap to ensure a smooth development process. Let’s set your project up for success from the start with a clear, actionable plan that minimizes risks and maximizes efficiency.
Programming Languages
JavaScriptWhat's included
| Service Tiers |
Starter
$1,000
|
Standard
$3,500
|
Advanced
$7,000
|
|---|---|---|---|
| Delivery Time | 7 days | 16 days | 30 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
8 reviews
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DS
Daria S.
Feb 18, 2026
Full-Stack Developer (Med-Tech Platform)
Really enjoyed working with Onix on this project. They were there with us from the very beginning, studying from architecture, dev strategies, DevOps to the final implementation. The team does high-quality work and supports each client from the strategic perspective. They are able to evaluate the work, guide the client in the correct direction, and suggest areas for improvement. Onix is always a reliable partner, no matter what code stack you're using. Their experience in healthcare was essential to the success of this project. We have built a very complex admin system, store fronts, and product management system to account for an array of product scenarios. I highly appreciate their help and support and will go back to Onix for any other project in the future.
CL
Conor L.
Oct 14, 2025
site fixes
It was great working with Onix. They have been integral in the maintenance and updating of our web app. Would definitely recommend.
CL
Conor L.
Sep 26, 2024
site fixes
CL
Conor L.
Sep 5, 2024
Development and design - rate $35
CL
Conor L.
Aug 21, 2024
Development and design - rate $35
Great working with Onix as always.
About Ihor
Node.js Developer | Node.js Backend Developer | Node js Developer
100%
Job Success
Kropyvnytskyy, Ukraine - 12:13 am local time
⭐ AI-assisted backend workflows are excellent for speed — architecture still requires engineering experience.
⚡ 10+ Years of Professional Experience
⚡ Millions of Requests Processed Through High-Load APIs
⚡ 99.99% Uptime for Mission-Critical Systems
⚡ 30–40% Faster Delivery Through AI-Assisted Engineering
⚡ Trusted by Startups, SaaS Companies & Enterprise Clients
Welcome! 👋 I'm a Senior Node.js Developer, Node.js Backend Developer specializing in scalable, secure, and high-performance backend systems.
For 10+ years, I've helped companies architect, build, optimize, and modernize SaaS platforms, enterprise applications, fintech products, healthcare solutions, CRM/ERP systems, and marketplace platforms. From Startup MVPs to enterprise ecosystems, I deliver software designed to scale with business growth.
🔥 WHAT YOU GET
✔ High-Performance Backend systems engineered to process millions of requests with 99.99% uptime.
✔ Production-ready features delivered 30–40% faster using AI-assisted development and AI-generated code workflows.
✔ End-to-End Development—from MVP Development and Product Development to long-term Backend Support and Application Maintenance.
✔ A Dedicated Developer and Technical Lead focused on measurable business outcomes.
🏆 RESULTS & IMPACT
✔ Delivered SaaS Development initiatives, ecommerce solutions, enterprise applications, and real-time systems serving thousands of users worldwide.
✔ Improved API performance by up to 50% through Backend Optimization, Redis caching, and Database Architecture improvements.
✔ Accelerated release cycles by 30–40% using AI-native engineering practices without sacrificing maintainability.
✔ Built Scalable Backend infrastructures capable of supporting millions of transactions and sustained business growth.
🚚 WHERE I DELIVER
As a Senior Node.js Developer and Backend Engineer, I build REST API and GraphQL API ecosystems using Node.js, Express.js, NestJS, Fastify, Koa.js, JavaScript, TypeScript, WebSocket, Socket, Microservices, and Event-Driven Architecture.
As an API Developer and REST API Developer, I deliver API Development, API Integration, Third-Party API Integration, Authentication, Authorization, JWT, OAuth, SSO, Swagger, OpenAPI, and API Documentation for secure enterprise environments.
As a Full Stack Developer, I create Web Applications, Ecommerce Websites, Website Redesign projects, Browser Extensions, Google Chrome Extensions, Desktop Applications, Platform Plugins, Headless CMS, CMS Integration, Odoo Development solutions, and End-to-End Development initiatives.
As an AI engineering partner, I help companies implement AI Development through AI Agent Development, AI App Development, AI Bots, Chatbots, ChatGPT Integration, OpenAI API integrations, OpenAI Codex Prompt workflows, AI Model Integration, and AI-generated code strategies that improve team productivity by 30–40%.
💳 INTEGRATIONS & AUTOMATION
✔ 10+ years integrating Stripe Integration, PayPal Integration, Twilio Integration, SendGrid, shipping providers, Payment Integration services, Webhooks, and System Integration workflows.
✔ Built asynchronous architectures using RabbitMQ, Kafka, BullMQ, Queue Management, and Message Queues to improve throughput and reliability.
✔ Automated Data Processing and ETL pipelines that reduce manual effort and support real-time decision-making.
⚒️ TECHNOLOGY ECOSYSTEM
✔ 10+ years of Backend Development using Node.js, Express.js, NestJS, Fastify, JavaScript, TypeScript, Python, PHP, Java, Kotlin, Scala, Ruby, C#, ASP.NET, Django, and modern Software Architecture practices.
✔ 8+ years delivering Full-Stack Development with React, Angular, AngularJS, Vue.js, HTML5, CSS3, Bootstrap, jQuery, Google Analytics, Adobe Photoshop, and Website Optimization strategies.
✔ 10+ years designing Database Development and Database Architecture solutions using MongoDB, PostgreSQL, MySQL, Redis, DynamoDB, Firebase, Supabase, Prisma, TypeORM, Sequelize, Mongoose, Microsoft SQL Server, MariaDB, Oracle, Neo4j, and Azure Cosmos DB.
✔ 7+ years deploying cloud-native applications with Amazon Web Services (AWS), Lambda, EC2, S3, Azure, Google Cloud Platform, Docker, Kubernetes, DevOps, Serverless Architecture, GitHub Actions, Jenkins, Git, and CI/CD pipelines.
🤖 AI-ASSISTED ENGINEERING STACK
✔ 5+ years leveraging Cursor, GitHub Copilot, Claude Code, OpenAI ChatGPT, GPT-4, and GPT-4o to accelerate prototyping, debugging, testing, and implementation by 30–40%.
✔ While AI accelerates delivery, critical architecture decisions, scalability planning, and Technical Lead responsibilities remain grounded in 10+ years of engineering experience.
🤝 LET'S BUILD SOMETHING GREAT
Whether you need a Node.js Developer, Node.js Backend Developer, Backend Engineer, Full-Stack Developer, API specialist, AI integration partner or Technical Lead I'd be happy to discuss your architecture, roadmap, and next steps.
Steps for completing your project
After purchasing the project, send requirements so Ihor can start the project.
Delivery time starts when Ihor receives requirements from you.
Ihor works on your project following the steps below.
Revisions may occur after the delivery date.
Discussing the idea