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// Build

API Integration Services in Bangalore

Custom REST and GraphQL API development, third-party integrations, payment gateways, CRM/ERP connectors, and webhook automation. Built with retry logic, circuit breakers, and monitoring that make your integrations as reliable as your core product.

// Standards

Integration engineering standards

Reliability by design

Retry logic, circuit breakers, idempotency keys, and dead letter queues, integrations designed to handle failures gracefully, not ignore them.

Security baseline

OAuth 2.0 or JWT authentication, input validation, rate limiting, HTTPS enforcement, and no credentials in code or logs.

OpenAPI documentation

Every custom API is documented with OpenAPI 3.0, machine-readable specifications that enable client SDK generation and API portal publication.

Tested at failure modes

Integration tests cover error scenarios, API timeouts, 4xx errors, schema drift, and rate limit responses, not just happy paths.

Monitored in production

Error rates, latency percentiles, and integration health metrics are monitored and alerted from day one.

Dependency isolation

Third-party APIs are wrapped in adapter layers that prevent their failures or schema changes from cascading into your core product.

// Technology

Integration technology stack

API Design

OpenAPI 3.0RESTGraphQLgRPCSwagger UIRedoc

Backend Frameworks

Node.js / ExpressFastifyPython / FastAPINestJSHonotRPC

Authentication

JWTOAuth 2.0API KeysClerkAuth0Passport.js

Integration Platforms

n8nMakeZapierMuleSoftBoomiWorkato

Payments

StripeRazorpayPayUCashfreePayPalBraintree

Monitoring

DatadogSentryPostmanInsomniaArtilleryk6

// Process

From API design to monitored production integration

01

API Design

2–4 days

OpenAPI 3.0 specification defines resource models, endpoints, request/response schemas, authentication, and error codes. Reviewed before implementation.

// Stack & frameworks

Stack we use for this

Frontend

  • Next.js App Router
  • React 18+
  • Tailwind CSS
  • Core Web Vitals tuning

Backend & data

  • Node.js / Python APIs
  • PostgreSQL
  • Redis caching
  • REST & GraphQL

Operations

  • CI/CD pipelines
  • Docker / Kubernetes
  • Observability
  • Security hardening

// Delivery

Simplileap execution framework

01

Architecture mapping

Dependencies, API contracts, compliance constraints, and performance budgets documented before sprint one.

02

Secure sprints

Two-week increments with GitHub access, demo recordings, and QA checkpoints, client visibility at every stage.

03

QA & handover

Automated tests on critical paths, security review, runbooks, and knowledge transfer to your team.

// Proof

Real deployments from Bangalore

Manufacturing distributor

Challenge
NetSuite and Salesforce created duplicate orders and 12h weekly reconciliation.
Simplileap solution
Event-driven middleware with idempotent sync and DLQ replay.
Outcome
Reconciliation hours 12 → 1.5; zero duplicate orders in two quarters.
Read full case study ›

Home goods wholesaler

Challenge
Shopify Plus B2B checkout needed ERP credit checks and PO capture.
Simplileap solution
Checkout UI extensions, webhook export, and Netstock inventory loop.
Outcome
B2B order error rate 6% → 0.4%.
Read full case study ›

// Engagement models

How teams engage us

Currency
PackageIdeal forInvestmentIncludes
Product MVPStartups₹8L – ₹25L
  • · Discovery
  • · Design + web/mobile + API
  • · CI/CD
  • · Launch support
E-commerce buildRetail & D2C₹80K – ₹15L
  • · Catalogue & checkout
  • · Payment integrations
  • · Admin dashboard
  • · Performance tuning
Mobile app (iOS / Android)Product teams₹6L – ₹18L
  • · UX + React Native / native
  • · API integration
  • · App Store submission
  • · Up to 10 screens

// Company and service positioning

Company and Service positioning is reviewed for production delivery standards by Harsha Parthasarathy (Co-Founder, Strategy & Operations 24+ years IT veteran, IBM, Global Delivery, Program Management) and Keshav Sharma (Co-Founder, Engineering and Lead Architect, Full-stack engineering, product delivery and technical standards).

// Verified entity

Simplileap Digital LLP

// Recognition

Featured in QuickNode Feature Fridays

CIN

AAU-8582

Startup India

Founded

November 2020

Office

Residency Rd, Bengaluru, India

// FAQ

Common questions about API integrations

What is the difference between REST and GraphQL?+

REST uses predefined resource endpoints, simple, cacheable, and well-understood. GraphQL uses a single endpoint with flexible queries, better for complex data relationships and multiple clients with different data needs. We recommend based on your specific access patterns.

How do you handle third-party API outages?+

Circuit breakers detect and isolate failing third-party services, preventing cascading failures. Retry logic with exponential backoff handles transient failures. Fallback responses ensure graceful degradation when services are unavailable.

What payment gateways do you integrate with?+

Stripe, Razorpay, PayU, Cashfree, and PayPal for most engagements. We also integrate with regional gateways as needed. For Indian businesses, Razorpay or Cashfree for UPI/NEFT support alongside cards.

Can you integrate with SAP or legacy ERP systems?+

Yes, SAP BAPI, RFC, and OData APIs; NetSuite SuiteScript and REST; Oracle ERP APIs. ERP integration is complex but we have delivered it successfully across multiple enterprise engagements.

How do you secure webhook endpoints?+

HMAC-SHA256 signature verification on every incoming webhook ensures the request is from the expected source. We implement idempotency to prevent duplicate processing of retried webhooks.

Ready to connect your systems reliably?