You will get a reliable Node.js API or third-party integration in TypeScript
Project details
I will develop a scoped Node.js API feature or integrate a third-party service using JavaScript or TypeScript.
Depending on the selected package, the work may include REST endpoints, webhook handling, request validation, database access, authentication, error handling, tests, and integration documentation.
I begin by reviewing the expected data flow and external documentation. I then confirm the scope, implement the agreed functionality, verify expected and failure scenarios, and provide a clear technical handoff.
Each package covers a defined number of related endpoints or one integration flow. Complex payment systems, undocumented external services, data migrations, infrastructure redesigns, or unrelated legacy-code problems may require an additional milestone or custom offer.
Depending on the selected package, the work may include REST endpoints, webhook handling, request validation, database access, authentication, error handling, tests, and integration documentation.
I begin by reviewing the expected data flow and external documentation. I then confirm the scope, implement the agreed functionality, verify expected and failure scenarios, and provide a clear technical handoff.
Each package covers a defined number of related endpoints or one integration flow. Complex payment systems, undocumented external services, data migrations, infrastructure redesigns, or unrelated legacy-code problems may require an additional milestone or custom offer.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$199
|
Standard
$499
|
Advanced
$999
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$50
Additional Page
(+ 2 Days)
+$150
Additional related endpoint
(+ 2 Days)
+$150
Deployment assistance
(+ 1 Day)
+$100Frequently asked questions
About Alexandr
Senior React & Next.js Engineer | SaaS, Dashboards & TypeScript
Prague, Czech Republic - 2:10 am local time
With 7+ years of software engineering experience, I can take ownership of the full development lifecycle—from clarifying requirements and designing the architecture to implementation, testing, deployment, and production support.
I can help you with:
• React and Next.js application development
• Node.js, NestJS, and Express backend services
• Full-stack SaaS products, dashboards, and internal tools
• REST API development and third-party integrations
• Authentication, permissions, payments, and real-time features
• Debugging, refactoring, and modernization of existing applications
• Performance optimization and production issue resolution
• Docker, CI/CD, and deployment workflows
My core stack includes React, Next.js, TypeScript, Node.js, NestJS, PostgreSQL, MongoDB, Redis, Docker, GitHub Actions, and GitLab CI/CD.
I focus on maintainable solutions, clear communication, and practical engineering decisions appropriate for your product’s current stage. I am comfortable joining an existing codebase or building a new application from the ground up.
I am based in Prague and available for both short-term assignments and long-term product development.
Steps for completing your project
After purchasing the project, send requirements so Alexandr can start the project.
Delivery time starts when Alexandr receives requirements from you.
Alexandr works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements and data-flow review
I review the API documentation, request and response examples, authentication method, repository, and deployment context.
Scope and implementation plan
I confirm the endpoints, validation rules, data storage, error behavior, tests, and deliverables included in the package.