Microservices Architecture for Scale Using FastAPI and Pub/Sub
Scalable microservices using FastAPI and Pub/Sub
See How We Build for Complex BusinessesAs products grow, monolithic systems struggle to handle scale, deployments, and team collaboration. Modern architectures require flexible, event-driven systems that can evolve without breaking.
Who This Is For
We usually work best with teams who know building software is more than just shipping code.
This is for teams who:
SaaS platforms scaling rapidly
Startups moving from monolith to microservices
Products with high traffic and performance needs
Teams adopting event-driven architectures
Organizations building distributed systems
This may not fit for:
Small applications with simple backend needs
Projects without scalability requirements
Teams not ready for distributed system complexity
Use cases better suited for monolithic design
the real problem
Monoliths slow down scaling and development
Businesses face slow deployments, tightly coupled services, and performance issues under load. Lack of clear boundaries and poor system visibility make scaling and maintaining applications difficult.
how this is usually solved
(and why it breaks)
common approaches
Splitting services without domain clarity
Synchronous communication causing bottlenecks
Manual deployments with downtime
Lack of monitoring and tracing
Tightly coupled services with shared dependencies
Where these approaches fall short
Frequent system failures and downtime
Slow performance under heavy load
Difficult debugging and issue tracking
Reduced team productivity
Limited scalability and flexibility
Core Features & Capabilities
01
FastAPI-Based Services
Build high-performance, async microservices for scalability.
02
Event-Driven Architecture
Use Pub/Sub messaging for decoupled communication.
03
API Gateway Layer
Manage routing, authentication, and traffic control.
04
Observability Stack
Enable logging, metrics, and distributed tracing.
05
Auto-Scaling and CI/CD
Deploy services independently with zero downtime.
06
Domain-Based Architecture
Structure services around business domains for clarity.
how we approach it
01
Define service boundaries based on business domains
02
Build FastAPI services with async communication
03
Implement Pub/Sub messaging and API gateway
04
Deploy, monitor, and optimize continuously
How We Build at PySquad
We design microservices architectures using FastAPI for high-performance services and Pub/Sub for asynchronous communication. Our approach ensures scalability, resilience, and smooth team collaboration.
outcomes you can expect
01
Highly scalable and resilient system architecture
02
Faster deployments with minimal downtime
03
Improved performance and lower latency
04
Better team productivity and system clarity
Looking for similar solutions?
let's build yoursFrequently asked questions
Yes, FastAPI is async-first, lightweight, and extremely performant.
Depends on scale—Kafka for high throughput, Google Pub/Sub for managed simplicity, Redis Streams for lightweight use cases.
Yes, teams can own independent services with isolated deployments.
We implement logs, metrics, and distributed tracing using OpenTelemetry.
Yes, we follow an incremental strangler-pattern approach for safe migration.
About PySquad
PySquad works with businesses that have outgrown simple tools. We design and build digital operations systems for marketplace, marina, logistics, aviation, ERP-driven, and regulated environments where clarity, control, and long-term stability matter.
Our focus is simple: make complex operations easier to manage, more reliable to run, and strong enough to scale.
Strategic Solutions in This Domain
Integrated platforms and engineering capabilities aligned with this business area.
have an idea? lets talk
Share your details with us, and our team will get in touch within 24 hours to discuss your project and guide you through the next steps
happy clients50+
Projects Delivered20+
Client Satisfaction98%