You will get a secure REST API backend built with Node.js or Python
Project details
You will get a secure, production-ready REST API backend built with Node.js or Python/FastAPI — designed for reliability, security, and scalability from day one.
I bring 3 years of backend engineering experience building systems that handle real-world complexity. My work includes PayRoute, a cross-border payment processing API with atomic transactions and webhook verification, and Collab Tasks API, a multi-tenant SaaS backend with background job processing and real-time features. Every system I build is tested,
documented, and built to last.
What makes my work different:
• I design before I code (architecture review before any development)
• I write tests (95%+ coverage with Jest or Pytest)
• I deliver documentation (Swagger/OpenAPI included)
• I think about failure modes, not just the happy path
Whether you need a simple API for a mobile app or a complex backend with authentication, database design, webhook integrations, and background jobs — I'll build it clean, secure, and on time.
My code samples are available in my Portfolio section.
I bring 3 years of backend engineering experience building systems that handle real-world complexity. My work includes PayRoute, a cross-border payment processing API with atomic transactions and webhook verification, and Collab Tasks API, a multi-tenant SaaS backend with background job processing and real-time features. Every system I build is tested,
documented, and built to last.
What makes my work different:
• I design before I code (architecture review before any development)
• I write tests (95%+ coverage with Jest or Pytest)
• I deliver documentation (Swagger/OpenAPI included)
• I think about failure modes, not just the happy path
Whether you need a simple API for a mobile app or a complex backend with authentication, database design, webhook integrations, and background jobs — I'll build it clean, secure, and on time.
My code samples are available in my Portfolio section.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$100
|
Standard
$250
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 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.
Fast Delivery
+$25 - $75
Additional Revision
+$30Frequently asked questions
About Anthony
Backend Developer | Node.js, Python/FastAPI | Payment & API Systems
Lagos, Nigeria - 1:35 am local time
Recent work:
- PayRoute: Cross-border payment API with double-entry bookkeeping, idempotency middleware, and HMAC webhook verification (Node.js, PostgreSQL)
- SwiftTalk: Real-time chat backend with WebSockets and JWT auth (99.9% uptime)
- Collab Tasks API: Multi-tenant SaaS backend with Celery workers and webhook retry systems (Python/FastAPI)
What I deliver:
- Clean, tested code (95%+ test coverage)
- Secure authentication and authorization (JWT, RBAC, bcrypt)
- Database optimization (40% performance improvements via strategic indexing)
- Clear communication and on-time delivery
Background: B.Sc. Biochemistry, with a Software Engineering certification from Holberton School. My analytical foundation combined with hands-on engineering training shapes how I approach problem-solving — methodical, detail-oriented, and focused on getting things right.
My code samples and live project demos are available in my Portfolio section below.
Let's build something reliable.
Steps for completing your project
After purchasing the project, send requirements so Anthony can start the project.
Delivery time starts when Anthony receives requirements from you.
Anthony works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Planning
I review your requirements, ask clarifying questions, and propose the API architecture, data models, and tech stack before writing any code.
Development
I build the API endpoints, database schema, authentication, and integrations according to the agreed specification with regular progress updates.