You will get Build or Fix Node.js APIs | Authentication, Integrations, Bug Fixes
Project details
I will build or fix reliable Node.js APIs for your product. Whether you need a new endpoint, a backend module, or an integration with services like Twilio or Stripe, I deliver clean, well-structured code with testing and clear documentation. I specialize in helping startups ship stable backend features quickly and with minimal friction.
Programming Languages
JavaScript, TypeScriptWhat's included
| Service Tiers |
Starter
$150
|
Standard
$350
|
Advanced
$700
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 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.
Additional Revision
+$30
Source Code
+$1
Additional API Endpoint
+$75Frequently asked questions
About Chetan
Full-Stack Engineer | Node.js, React, API Integrations & Automation
Bengaluru, India - 9:35 am local time
Over the last several years, I’ve helped startups and growing engineering teams design, refactor, and deliver production-grade systems - improving performance, cutting tech debt, and enabling faster product delivery.
I work across the full product lifecycle: architecture → backend → frontend → integrations → deployment.
💼 What I Help Companies With
🔧 Backend Engineering
• Node.js / Express / Nest-like modular architectures
• Scalable REST APIs & microservices
• Authentication/authorization (JWT, Firebase Auth, custom auth flows)
• Database design & optimization (PostgreSQL, MySQL, MongoDB)
• Performance tuning, indexing, caching, API optimization
• Workflow automation and event-driven systems
• Third-party integrations (Twilio, SendGrid, Stripe, Webhooks, etc.)
🎨 Frontend Engineering
• React.js / Next.js frontends
• Responsive UI engineering and design systems
• Chrome Extensions (content scripts, message passing, overlays, OCR tools)
• Dashboard development, admin tools, real-time interfaces
• Progressive refactoring of legacy UI
🔌 Integrations & Automation
• API-to-API automation
• Twilio Voice/SMS workflows
• Email/notification pipelines (SendGrid, Postmark, Resend)
• CRM, analytics, and reporting integrations
• Background jobs, queues, schedulers, serverless workflows
🛠 System Architecture & Refactoring
• Breaking monoliths into clean modular services
• Improving stability & reducing downtime
• Identifying bottlenecks & improving throughput
• Designing scalable folder structures, migration strategy, & documentation
🚀 Why Work With Me
• Clear communication & daily updates
• Clean, maintainable, scalable code
• Strong product thinking — not just “coding tasks”
• Fast iteration with a focus on long-term maintainability
• Experience delivering high-volume, high-uptime systems
Whether you're building a new product, modernizing an existing one, or need an engineer who can take ownership of a complex technical initiative - I can help.
🔎 Core Tech Stack
Backend: Node.js, Express, Microservices, REST APIs, Database Optimization
Frontend: React, Next.js, Chrome Extensions, UI Engineering
DB: PostgreSQL, MySQL, MongoDB, Redis
Integrations: Twilio, SendGrid, Webhooks, Stripe, Firebase
Other: Docker, CI/CD, Cloud services, System Design
📩 Let’s build something great together.
Steps for completing your project
After purchasing the project, send requirements so Chetan can start the project.
Delivery time starts when Chetan receives requirements from you.
Chetan works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements and existing code
I will review your API needs, check existing code (if provided), and confirm the plan before starting.
Implement API features or fixes
I will build or fix the requested API endpoints, add integrations, and ensure the backend functions correctly.