Backend / APIs
High-throughput, fault-tolerant backend services and API architectures.
We design and build secure distributed backends, REST/gRPC/GraphQL services, asynchronous job workers, and database architectures built for 99.99% uptime under high concurrent load.
Building backends that survive high traffic spikes and data corruption
Monolithic backends frequently stall under concurrency spikes, suffering from database connection exhaustion, unhandled deadlocks, and brittle synchronous API cascades that bring down entire platforms.
API timeouts and database lock contention under heavy burst traffic
Cascading failures across interconnected microservices during partial outages
Lack of idempotency leading to duplicate financial or data mutations
Difficult debugging due to fragmented logging and missing distributed trace IDs
Backend Capabilities
High-Concurrency API Design
Building low-latency REST, gRPC, and GraphQL gateways with robust rate limiting, schema validation, and JWT/mTLS authentication.
Event-Driven Asynchronous Processing
Decoupling heavy computing tasks using RabbitMQ, Kafka, or SQS to process millions of transactions without blocking HTTP threads.
Database Indexing & Query Optimization
Designing normalized relational schemas and Redis caches to achieve sub-10ms query performance on multi-terabyte datasets.
Distributed Tracing & Observability
Instrumenting OpenTelemetry traces across every microservice to instantly pinpoint latency bottlenecks and error origins.
Proven runtimes and industry-standard protocols.
We select tools based on operational reliability, long-term maintainability, and horizontal scaling capabilities.
Languages & Runtimes
Protocols & Gateways
Message Queues
Telemetry
Why companies choose CodeSelf.
We operate as your dedicated technical partner with production codebases and zero markups.
What you receive at handoff.
Every engagement concludes with documented, tested, and deployable production codebases with zero ongoing licensing fees.
How CodeSelf builds and delivers backend / apis.
Sprint-based delivery with weekly code releases directly into your private staging environment.
Domain Modeling & API Contracts
Define entity schemas and OpenAPI/Protobuf specifications before writing implementation code.
Core Service & Persistence Layer
Implement business logic with transaction boundaries, connection pooling, and error models.
Asynchronous Queue Integration
Build worker pools with exponential backoff retries and dead-letter queue handlers.
Load & Chaos Testing
Subject services to simulated traffic surges and network drops using k6 and Chaos Mesh.
Key technical and commercial questions.
Who owns the source code and intellectual property for backend / apis systems?+
Can this technology stack be deployed inside our private cloud infrastructure (AWS/GCP/Azure)?+
How do you ensure zero downtime when updating live production services?+
What happens after the project launch? Do you provide ongoing maintenance and handover?+
Related technologies in our stack.
Frontend / Web
We build high-performance web applications with instantaneous navigation, zero layout shift, strict type safety, and seamless responsive behavior across all modern devices.
Databases
We design, tune, and maintain relational, NoSQL, vector, and time-series database architectures, ensuring high availability, automated backups, and sub-millisecond query latency.
Cloud
We design and deploy modern cloud infrastructures that eliminate single points of failure, automate disaster recovery, and optimize infrastructure spend using Infrastructure as Code (Terraform).
Ready to build or scale your backend / apis stack?
Schedule an architectural consultation with our senior systems team to evaluate infrastructure, tooling, and delivery roadmaps.