Contracts & Versioning
Define schemas, compatibility rules, deprecation windows, consumer tests, and documentation before integrations become dependencies.
Enterprise Integration & API Contracts
Connect Your Software Ecosystem with Robust API Architecture
We design, engineer, and secure enterprise API contracts — connecting internal ERP systems, third-party SaaS platforms, mobile backends, and payment gateways with high-speed RESTful, GraphQL, and gRPC endpoints.
200+ Endpoints Built & <30ms Latency
14+
API Endpoints Built & Integrated
99.99%
Target Integration Availability
<30ms
Target API Latency
200+
Daily API Payload Syncs
Integration Pillars
Enterprise API & Third-Party Integration Capabilities
Six specialized integration engineering pillars designed to connect legacy databases, cloud microservices, and external SaaS platforms smoothly.
01
RESTful, GraphQL & gRPC API Architecture
Versioned OpenAPI contracts, GraphQL schemas, and efficient gRPC protocols engineered and benchmarked for the workload they serve.
OpenAPI 3.0 Specs GraphQL Stitching gRPC Proto
02
SAP, Oracle & Salesforce Enterprise Connectors
Bi-directional real-time data sync between enterprise ERPs (SAP S/4HANA, Oracle NetSuite) and CRMs (Salesforce, HubSpot, Zoho).
SAP S/4HANA Oracle NetSuite Salesforce Sync
03
Stripe, PayPal & Bank Payment Gateway APIs
PCI-DSS Level 1 compliant payment integrations, multi-currency subscription billing, 1-click checkout drawers, and automated refund reconciliation.
Stripe Payments PCI-DSS Level 1 Subscription Billing
04
Kong & AWS API Gateway Security & OAuth2
OAuth2 mTLS token authentication, rate-limiting rules, Web Application Firewall (WAF) filtering, and edge caching for high-concurrency API protection.
Kong Gateway OAuth2 mTLS Rate-Limiting
05
Asynchronous Webhooks & Kafka Event Streaming
Event-driven webhooks, Kafka streams, RabbitMQ queues, idempotency controls, and observable retry paths for resilient delivery.
Apache Kafka RabbitMQ Bus Webhook Retries
06
Legacy SOAP XML & Mainframe Middleware Bridges
Transforming aging SOAP XML services, COBOL/AS400 mainframe databases, and file-based EDI feeds into modern JSON REST endpoints.
SOAP XML Bridge EDI File Parsing JSON Translation
RESTful, GraphQL & gRPC Microservice API Contracts
Clean API Contracts & Predictable Performance
Brittle, poorly documented APIs create integration friction, slow down frontend development, and cause system outages. We write clean, versioned API contracts following OpenAPI 3.0 and GraphQL schemas.
✓
OpenAPI 3.0 & Interactive Swagger Docs
Self-documenting API contracts with interactive Swagger UI, sandbox playgrounds, and strict request/response schema validation.
✓
gRPC Microservice Protocol Buffers
Ultra-low-latency binary serialization for internal backend-to-backend communication under heavy payload loads.
✓
GraphQL Multi-Resource Query Fetching
Eliminate over-fetching and under-fetching by allowing client apps to query exact fields in a single HTTP request.
Versioned contracts · Schema checks · Developer experience
Identity · Policy · Throttling · Traffic insight
Kong & AWS API Gateway Security, OAuth2 & Rate-Limiting
Layered API Security & Traffic Protection
Protect core microservices from DDoS attacks, unauthorized access, and traffic spikes with enterprise API gateways featuring OAuth2 mTLS authentication, rate-limiting, and web application firewall security.
✓
OAuth2 & Mutual TLS (mTLS) Authentication
Cryptographically verify every API request payload with OAuth2 bearer tokens and client certificate validation.
✓
Token Bucket Rate-Limiting & Throttling
Prevent API abuse and server overload by setting per-client IP rate-limiting tiers and automatic throttle queues.
✓
Edge Caching & Global CDN Acceleration
Cache eligible responses near users and benchmark latency by geography, payload size, origin performance, and cache behavior.
Real-World Third-Party Integration Projects We Engineer
Real-World Third-Party Systems Integration Projects
From SAP/Oracle ERP real-time sync pipelines and Stripe payment gateways to Salesforce CRM data buses, e-commerce shipping APIs, and legacy mainframe bridges.
✓
SAP, Oracle & Microsoft Dynamics ERP Sync
Bi-directional real-time inventory, order fulfillment, and customer financial ledger synchronization.
✓
Stripe, PayPal & Bank Payment Gateways
PCI-DSS Level 1 compliant payment processing, subscription renewal webhooks, and automated refund reconciliation.
✓
Salesforce, HubSpot & Zoho CRM Data Sync
Automated lead ingestion, contact activity tracking, opportunity updates, and customer 360 sync.
✓
FedEx, UPS & DHL Shipping & Logistics APIs
Real-time shipping rate quotes, dispatch label generation, and automated delivery tracking webhooks.
ERP · Payments · CRM · Logistics
Integration Reliability Model
Design Every Message for Change, Failure, and Recovery
Reliable integrations need more than a working happy path. We build explicit contracts, delivery controls, operational evidence, and ownership into the platform.
Reliable Delivery
Use idempotency, timeouts, bounded retries, queues, ordering controls, and dead-letter workflows to make failure recoverable.
End-to-End Observability
Trace correlation IDs, latency, error classes, queue depth, delivery age, and business outcomes across every system boundary.
Ownership & Operations
Assign service owners, response playbooks, access reviews, change communication, and measurable service objectives.
Integration Process
Our 6-Step API Engineering & Integration Lifecycle
Our disciplined integration methodology reduces delivery risk through explicit contracts, fault testing, controlled security, and production telemetry.
01
Integration Discovery
Auditing API documentation, database schemas, rate limits, and authentication protocols of target systems.
02
API Contract Design
Writing OpenAPI 3.0 or GraphQL contract specifications, defining request/response JSON payloads and error codes.
03
OAuth2 Gateway Security
Configuring Kong or AWS API Gateway, setting up OAuth2 token validation, rate-limiting, and CORS security rules.
04
Bi-Directional Connector Build
Engineering custom API connectors, webhook listeners, Apache Kafka message buses, and error retry handlers.
05
Load & Fault Testing
Simulating peak traffic spikes, network dropouts, expired access tokens, and invalid payload edge cases.
06
Production Monitoring
Rolling out endpoints into production with real-time Datadog latency tracing, uptime alerts, and SLA support.
Architecture Impact
Move from Fragile Connectors to Operable Integration Services
See how contract-driven integration architecture improves control compared with unmonitored point-to-point scripts.
Fragile Un-Monitored Scripts
- ✕ Frequent silent data sync failures during unexpected third-party API changes.
- ✕ Slow response times causing user UI freezing and HTTP 504 gateway timeouts.
- ✕ Vulnerable API endpoints exposed to credential leaks and rate-limit bans.
- ✕ Lack of payload error retry logs resulting in permanently lost customer records.
Sibiri Robust API Architecture
- ✓ Availability targets supported by queues, bounded retries, idempotency, and tested recovery paths.
- ✓ Performance budgets measured by endpoint, dependency, payload, geography, and traffic profile.
- ✓ Layered OAuth2, mTLS, gateway policy, secrets, and rate-limiting controls matched to risk.
- ✓ Correlated logs, metrics, traces, and delivery evidence for important integration flows.