You will get bugs fixed or new features added to your React or Node app
Project details
Something broken, slow, or missing? I'll fix it — fast and cleanly. I resolve bugs, add features, and improve existing React, Next.js, Node.js and .NET apps with clean, maintainable code, and I explain what I changed. Great for quick tasks — and a great way to start working together. Send me the issue and I'll tell you quickly if I can fix it and how long it'll take.
Programming Languages
JavaScript, TypeScript, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$35
|
Standard
$95
|
Advanced
$250
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | |||
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Extra bug fix
(+ 1 Day)
+$25
Performance optimization
(+ 2 Days)
+$70
Urgent 24h delivery
+$60Frequently asked questions
About Aleksa
Full-Stack Developer - React/Next.js, Node & .NET + AI/LLM (RAG)
Nis, Serbia - 6:09 am local time
Frontend
• React, Next.js & TypeScript for fast, responsive, intuitive interfaces
• Angular for enterprise-grade dashboards and complex data-driven systems
• Clean UI/UX with Tailwind, MUI and custom, reusable components
Backend
• .NET / C# and Node.js for reliable, secure, scalable APIs
• Clean Architecture, SOLID principles and professional engineering practices
• Third-party integrations, authentication and core business logic
Databases
• PostgreSQL, SQL Server and EF Core — efficient queries, indexing, large datasets
AI / LLM (my edge)
• RAG assistants grounded in your own documents, with sources for every answer
• OpenAI, Groq and Gemini integrations, vector search with pgvector
• AI-powered features: chatbots, text generation, classification, automation
Selected work (live demos in my portfolio): AI knowledge assistants (RAG), marketplace & e-commerce platforms, and business systems.
I communicate clearly, meet deadlines and take full ownership of my work. Whether you need a brand-new app, an AI feature, or improvements to an existing system — let's build something great together.
Steps for completing your project
After purchasing the project, send requirements so Aleksa can start the project.
Delivery time starts when Aleksa receives requirements from you.
Aleksa works on your project following the steps below.
Revisions may occur after the delivery date.
Review the issue and confirm scope & timeline.
Fix the bug or implement the feature.