Node.js / Python Backend
Performant APIs and integration services. NestJS, Express, FastAPI - data processing, queues, and middleware.
About this technology
We reach for Node.js and Python where performant APIs and heavy data processing matter most. NestJS and Express give backend services a clear, maintainable structure, while FastAPI lets us ship well-documented, typed endpoints quickly.
We use them to build integration services that connect our clients' systems - ERP, CRM, payment gateways, and data warehouses. We design asynchronous workers and queues, define the caching strategy, and optimize database queries so the backend stays fast as traffic grows.
How we deliver
Integration Analysis
Mapping data sources, formats, API rate limits, and traffic volume.
API Design
REST or GraphQL contracts, versioning, authorization, and OpenAPI documentation.
Implementation
NestJS, Express, or FastAPI with a service layer, workers, and job queues.
Optimization
Caching (Redis), database query tuning, profiling, and load testing.
Typical use cases
Integration Services
Middleware connecting ERP, CRM, WMS, and third-party systems into one flow.
REST & GraphQL APIs
Performant APIs as the backend for web and mobile applications.
Data Processing
ETL pipelines, product feed imports, and catalogue synchronization.
Workers & Queues
Asynchronous background jobs on RabbitMQ, Redis, or Celery.
Backend Optimization
Caching strategy, indexing, and speeding up slow database queries.
Microservices
Extracting critical functions from a monolith into independent services.
How we deliver
Consultation
Free conversation about your project and needs.
Analysis
In-depth requirements analysis and solution proposal.
Delivery
Iterative development with regular demos and feedback.
Support
Ongoing technical support and product development.