Web Development

API Integrations, Payment Gateways & Microservices

Connect disparate software systems: payment gateways, courier APIs, ERPs, CRMs, and messaging automation.

Connect Your Systems ↗ View Scope & Deliverables ↓

API Integrations, Payment Gateways & Microservices - Zendbot

Eliminate manual data entry and brittle spreadsheets. We build reliable, fault-tolerant integration pipelines between your core software and third-party services.

With automatic retry mechanisms, rate-limiting, encrypted webhooks, and idempotent transactions, your data stays synchronized in real-time.

Key Deliverables

Scope & Handover Items

Custom API middleware & webhook receivers

Payment gateway integrations (bKash, Nagad, SSLCommerz, Stripe, PayPal)

Courier APIs (Steadfast, Pathao, RedX, Paperfly)

ERP & Accounting connectors (SAP, Tally, QuickBooks, Zoho)

Technical Architecture

Core Subsystems & Standards

Queue-driven async processing for high throughput
Idempotent transaction logs & error alert notifications
OpenAPI / Swagger documentation generation
SMS gateway automation (Greenweb, BulkSMS, Twilio)

Delivery Pipeline

How We Deliver This Service

STEP 01

API Audit

Review endpoint specifications, authentication protocols, and payload schemas.

STEP 02

Middleware Build

Write robust API handlers with retry queues and security validation.

STEP 03

Sandbox Testing

Simulate edge cases, connection timeouts, and high transaction volumes.

STEP 04

Production Deployment

Switch to live API keys with real-time health checks and monitoring.

Frequently Asked Questions

Questions about this service

01 How do you prevent duplicate charges during API timeouts? +

We implement idempotent request tokens, database transaction locks, and webhook reconciliation workers.

Engage For This Service

Get a scoped implementation plan.

Choose your preferred communication channel to discuss scope, timeline, milestones, and engineering squad allocation.

Estimated Timeline: 7–15 Days

Pricing Model: Fixed Integration Scope

Connect Your Systems ↗ Chat on WhatsApp ↗ Message on Messenger ↗

✓ Mutual Non-Disclosure Agreement (NDA)

✓ 100% Unencrypted Source Code Ownership

✓ 30-Day Complimentary Bug Warranty

Complementary Capabilities

More services for your growth stack.

Web Development

Custom Web Application Development

High-load Laravel web applications, role-based portals, and enterprise dashboards built for speed, security, and effortless scaling.

View Specifications ↗ Mobile Development

Mobile App Development (Android, iOS & Flutter)

Native Android and Flutter cross-platform mobile apps for eCommerce, field operations, delivery tracking, and customer loyalty.

View Specifications ↗ Software Engineering

Custom Software Development & Enterprise Architecture

Bespoke enterprise software systems, automated ERP pipelines, billing engines, and internal tooling with zero vendor lock-in.

View Specifications ↗

Built With This Service

Products and guides related to this service.

eCommerce