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Backends & APIs
Behind every seamless app is a bulletproof backend
While users interact with the frontend interface, the backend is the invisible engine that powers your software, managing databases, core business logic, and platform security. APIs act as the digital bridges, allowing your application to securely exchange real-time data with this engine. Without a robust backend and well-architected API, even a beautifully designed app is just a static shell.
The truth
The app is only the tip of the iceberg
A client calls us for “an app.” After the first conversation, it becomes clear that the story is bigger: data needs to come from somewhere, users need to be managed, business logic needs to live somewhere, integrations with external systems are required, and real-time communication is needed.
The app is six screens. The backend is the real project.
We see it time and again: teams hire an app agency for “the app” and then realize that 80% of the complexity sits in the backend. We know that upfront. That is why we put backend engineers and app engineers in the same team from day one.
The app is six screens. The backend is the real project.
We see it time and again: teams hire an app agency for “the app” and then realize that 80% of the complexity sits in the backend. We know that upfront. That is why we put backend engineers and app engineers in the same team from day one.
A typical project
App (iOS + Android)
BFF / API layer
Backend & business logic
The split varies per project, but the backend is almost always the largest part. Those who only discover that after building the app end up paying twice.
What we build
From API to event-driven systems
Rest
REST API's
Python · Node.js · Go · FastAPI · Express
Well-designed REST APIs with clear resource models, consistent error handling, versioning, and complete documentation via OpenAPI/Swagger.
GraphQL
GraphQL API's
Apollo · Hasura · Strawberry · Pothos
GraphQL for projects with complex data relationships or multiple clients with different needs. Schema-first or code-first, depending on the team.
Real-time
WebSockets & SSE
Socket.io · ws · Server-Sent Events
Real-time communication for chats, live dashboards, notifications, and collaborative features. WebSockets for bidirectional traffic, SSE for server-to-client streams.
Events
Event-driven Architecture
Kafka · RabbitMQ · AWS SQS · Redis Pub/Sub
Microservices that communicate through events instead of direct calls. Loose coupling, better scalability, natural audit trail. Kafka for high throughput, RabbitMQ for complex routing.
Data
Database Design
PostgreSQL · MongoDB · Redis · Elasticsearch
PostgreSQL for relational data with complex queries. MongoDB for document stores with flexible schemas. Redis for caching and sessions. Elasticsearch for search at scale.
Cloud
Infrastructure & DevOps
AWS · GCP · Docker · Kubernetes · Terraform
Cloud-native deployments on AWS or GCP. Docker containers, Kubernetes for orchestration at scale, Terraform for infrastructure as code. CI/CD via GitHub Actions or GitLab.
Programming language strategy
Why we don't stick to one language?
Runtime
Node.js · Bun
Subtitle
Node.js for most projects because of the ecosystem. Bun for projects where raw performance makes the difference.
Framework
Fastify · Hono · Apollo
Subtitle
Fastify for high-performance REST BFFs. Hono for edge deployment. Apollo Server for GraphQL BFFs.
Type safety
TypeScript · Zod · tRPC
Subtitle
TypeScript across the entire stack. Zod for runtime validation of requests and responses. tRPC for type-safe end-to-end contracts between the BFF and the app.
Scale
Built to scale
Scale is not a feature you add once the app is already big. It is an architectural choice you make before the first user signs up.
We build backends that serve ten users today and ten million tomorrow. Not by making everything complex from the start, but by laying the right foundations: stateless services, horizontal scalability, well-designed database schemas, and observability from day one.
We build backends that serve ten users today and ten million tomorrow. Not by making everything complex from the start, but by laying the right foundations: stateless services, horizontal scalability, well-designed database schemas, and observability from day one.
