Enterprise API & Custom Software Solutions
Scalable RESTful & GraphQL microservices, database architectures, and legacy software migrations.
We design and develop production-grade APIs and custom backend software that power complex enterprise operations with speed, reliability, and security.
Guaranteed Engineering Standards
Included with every API & Custom Software project milestone.
- High-Concurrency REST & GraphQL Microservices
- Interactive Swagger & OpenAPI 3.0 Documentation
- PostgreSQL & Redis High-Performance Database Architecture
- OAuth2, JWT & API Key Rate Limiting Gateway
- Automated Webhook Dispatchers & Retry Queues
- Full Source Code & Docker Deployment Blueprints
Strategic Business Advantages
How our enterprise API & Custom Software engineering creates compounding technical advantages for your business.
Sub-50ms Responses
Database indexing and Redis caching guarantee instantaneous API responses.
OpenAPI Standard
Swagger specs allow team and partner developers to integrate without guesswork.
Isolated Microservices
Containerized services scale independently under variable traffic loads.
Engineering Specifications & Modules
Rigorous code patterns, type safety, low latencies, and production-hardened cloud architecture.
High-Concurrency API Gateways
Asynchronous Node.js and Go microservices architected for massive concurrent connections.
Database Schema & Migration
PostgreSQL schemas with optimized indexes, foreign keys, and zero-downtime migrations.
Microservice Containerization
Docker containerization and Kubernetes configuration for resilient cloud deployment.
OpenAPI Schema Documentation
Auto-generated interactive API documentation portals for rapid integration.
Enterprise Auth & Access Control
Cryptographically signed JWTs, refresh token rotation, and RBAC authorization.
Automated Test Suites
Full automated test coverage validating every endpoint and status code.
Production System Topology
Our APIs follow Twelve-Factor App principles: stateless containers behind load balancers with external configuration, persistent databases with connection pooling, and in-memory caches.
Enterprise Industry Use Cases
WhatsFlow-Pro Webhook Engine
High-concurrency Node.js and Redis API gateway processing 50,000+ real-time webhooks daily.
View Project Case StudyAPI & Custom Software FAQ & Advisory
Everything you need to know about milestone timelines, architecture standards, pricing, and IP ownership.
Can ARSAJIX modernize our existing legacy backend software?
Yes. We specialize in strangler-fig pattern migrations: wrapping legacy codebases with modern REST APIs and gradually migrating services without operational downtime.
Have a Digital Product in Mind?
Consult with our senior technical architects. Get a transparent fixed-price milestone roadmap, technology feasibility report, and code estimate within 24 hours.