API Integration Services
Non-AI API integrations for CRM, ERP, identity, payment, partner, and internal systems through stable contracts and event flows.
We build integration layers across existing systems: CRM, ERP, identity, payment providers, partner APIs, event buses, and internal platforms. This service is about non-AI interoperability, interface contracts, and reliable data movement across tools you already run. If you need embedded AI inside those systems with governance, auditability, and fallback logic, use AI Enterprise Integrations. If you need net-new REST or GraphQL APIs as product interfaces, use API Development Services.
Why Companies Choose Us
Strong experience with fintech, telecom, consulting, hospitality, logistics
Engineering experience with high-load banking APIs (based on prior project work, e.g. VTB, Sber)
API layers built for long-term maintainability and clear versioning
Secure identity flows (OAuth2, SSO, Keycloak, JWT, MFA)
Enterprise-grade system integration capabilities
data flows designed in line with GDPR principles and modern authentication mechanisms
Expertise with legacy architectures (SOAP/XML → REST/GraphQL migrations)
Distributed event systems and microservices at scale
What We Deliver
Custom API Development
- —REST APIs with OpenAPI/Swagger
- —GraphQL schemas and resolvers
- —High-performance gRPC interfaces
- —API gateways with throttling, rate limiting, quotas
- —Versioning, monitoring, observability, lifecycle management
- —Secure authentication flows (OAuth2/SSO/MFA)
- —Outcome: clear API contracts and versioned interfaces that let teams ship independently.
Enterprise System Integrations
- —ERP, CRM, HRM, accounting system integration
- —Payment providers (Stripe-like, banking APIs, PSPs)
- —Logistics platforms, inventory systems, booking engines
- —Identity management (Keycloak, CAS, OpenID, SAML)
- —Enterprise ecosystems (SAP, Salesforce, HubSpot, Microsoft Dynamics, DATEV)
- —Webhooks, callback systems, event pipelines
- —Outcome: stable integration flows between core systems and external services.
Event Streaming & Messaging Systems
- —Kafka pipelines for real-time or batch events
- —Async workers & microservice communication
- —Transactional flows designed for high event frequency
- —Outbox patterns and message deduplication
- —Distributed workflows and reliable retries
- —Real-time notifications and event broadcasting
- —Outcome: robust event flows with clear semantics and traceable processing.
Legacy API Modernization
- —Transforming SOAP/XML to modern REST
- —Replacing outdated interfaces with a strong focus on minimizing downtime
- —Step-by-step migration paths with backward compatibility
- —Data normalization & transformation pipelines
- —Wrapping legacy services with modern API gateways
- —Reducing technical debt while keeping continuity
- —Outcome: modern interfaces without operational disruption.
Security & Access Control
- —OAuth2, JWT, SSO, MFA
- —Keycloak realm design + secure integration
- —RBAC permissions and privilege separation
- —API key & signature-based authentication
- —HMAC, request signing, timestamp validation
- —audit trails & activity logs designed in line with GDPR principles
- —Outcome: audit-ready auth flows and clearly separated access rights.
Performance & Reliability
- —Redis caching layers
- —Architectures for API throughput and scaling (clusters, auto-scaling)
- —Stress tests, load tests, profiling
- —Latency optimization, rate limits, and connection pooling
- —Circuit breakers, retry strategies, fallbacks
- —Prometheus + Grafana monitoring dashboards
- —Outcome: stable API latency and reliable limits under peak load.
Typical deliverables
- •API contracts (OpenAPI/AsyncAPI/GraphQL schema)
- •Auth model (scopes, token flows, RBAC)
- •Integration map (systems + data flows)
- •Migration plan (SOAP → REST, deprecation)
- •Observability (dashboards, alerts)
- •Handover (runbooks, documentation)
When You Need API Integrations
Choose this service when you want to:
Tools & Technologies
Protocols & API Layers
- —REST
- —GraphQL
- —SOAP
- —gRPC
- —WebSocket
Messaging & Streaming
- —Kafka
- —RabbitMQ
- —SSE
Security
- —OAuth2
- —JWT
- —Keycloak
- —CAS
- —SSO
- —MFA
Databases
- —PostgreSQL
- —ClickHouse
- —Redis
- —Oracle
Languages & Frameworks
- —Java 21
- —Spring Boot
- —Spring Cloud
- —Node.js (optional)
Monitoring
- —ELK Stack
- —Prometheus
- —Grafana
Infrastructure
- —Docker
- —Kubernetes
- —Nginx
- —API Gateways
Founder-Relevant
Case Studies
PlayDeck - Powering Telegram's Gaming Ecosystem
How we built the backend architecture for Telegram's fastest-growing gaming platform.
Togezzer - Social Commerce Platform
Creating a seamless social shopping experience with real-time recommendations.
Vulken FM
Inspection & Asset Management Platform - Internal survey and compliance system for facilities management with mobile inspection app and web-based admin platform.
VTB Bank
Real-Time Data Streaming Platform - High-performance data-streaming platform capable of processing millions of financial messages per second.
Societe Generale
Personalized Advertising & Credit Service Platform - Advanced financial services with real-time personalization.
Sber
Enterprise Data Analytics Platform - Comprehensive data processing and analytics solution for Russia's largest bank.
FAQ
REST, GraphQL, SOAP wrappers, gRPC services, and event-driven messaging.
Yes — CRMs, ERPs, banking services, logistics, identity providers, marketplaces, etc.
Yes — we design and optimize distributed systems intended to support scalable, high-load environments.
Absolutely — including wrapping, gradual migration, and backwards compatibility.
Yes — OAuth2, JWT, SSO, Keycloak, MFA, RBAC.
API development and integrations for companies operating production systems. We support organizations with API development, system integrations, and API architecture based on the specific technical and regulatory context of each project. All services are delivered individually and depend on system requirements and constraints.
API performance, scalability, security, and availability depend on system architecture, infrastructure, usage patterns, and operational practices. No specific guarantees are provided.