Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point

Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point

Why monolithic GraphQL APIs collapse under the weight of growing teams and domains. An introduction to GraphQL Federation 2 and the architecture behind a polyglot e-commerce platform.

Arthur CostaAArthur Costa
2026-03-07New

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Currently exploring Off-Heap Algorithms in Java.

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Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point
New

Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point

Why monolithic GraphQL APIs collapse under the weight of growing teams and domains. An introduction to GraphQL Federation 2 and the architecture behind a polyglot e-commerce platform.

GraphQLFederationMicroservices+4
Arthur CostaAArthur CostaMar 7, 202620 min readNew
Sharded Processing: Per-Core Isolation for Zero Contention
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Sharded Processing: Per-Core Isolation for Zero Contention

Eliminate contention entirely with per-CPU-core sharded buffers, thread affinity, and isolated processing lanes for maximum parallelism.

JavaOff-HeapSharding+5
Arthur CostaAArthur CostaJan 4, 202650 min readNew
Wait-Free Telemetry: Never-Blocking Observability
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Wait-Free Telemetry: Never-Blocking Observability

Build wait-free telemetry buffers that never block producers, with overwrite semantics for high-frequency trading observability that doesn't impact system performance.

JavaOff-HeapWait-Free+5
Arthur CostaAArthur CostaJan 4, 202650 min readNew
Wait-Free SPSC Queues in Java
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Wait-Free SPSC Queues in Java

How to replace synchronized queue handshakes with a wait-free Single-Producer Single-Consumer ring buffer that uses precise memory ordering instead of locks.

JavaOff-HeapConcurrency+4
Arthur CostaAArthur CostaDec 23, 202518 min readNew
A gentle introduction to observability
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A gentle introduction to observability

Learn the core concepts of observability, why logs, metrics and traces matter and how tools like OpenTelemetry, Prometheus and Grafana improve your system reliability

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Event Pipelines in Java: The LMAX Disruptor Pattern
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Event Pipelines in Java: The LMAX Disruptor Pattern

How to chain SPSC queues into a high-throughput event pipeline, following the LMAX Disruptor pattern for multi-stage processing with sub-microsecond latency.

JavaOff-HeapConcurrency+4
Arthur CostaAArthur CostaNov 19, 202518 min readNew
MPMC Queues in Java: The Final Boss
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MPMC Queues in Java: The Final Boss

How to build a dual-CAS Multi-Producer Multi-Consumer ring buffer in Java that scales on both ends without collapsing under lock contention.

JavaOff-HeapConcurrency+4
Arthur CostaAArthur CostaNov 18, 202518 min readNew
Lock-Free MPSC Queues in Java
New

Lock-Free MPSC Queues in Java

How to replace locked many-producer queues with a lock-free Multi-Producer Single-Consumer ring buffer coordinated entirely by CAS and sequence numbers.

JavaOff-HeapConcurrency+5
Arthur CostaAArthur CostaNov 17, 202518 min readNew
Off-Heap Algorithms in Java: The Ring Buffer Foundation

Off-Heap Algorithms in Java: The Ring Buffer Foundation

From a naive heap-based queue to an off-heap ring buffer with dramatically better throughput, tail latency, and GC behavior for high-frequency trading workloads.

JavaOff-HeapConcurrency+4
Arthur CostaAArthur CostaNov 15, 202520 min read4 views
The Actor Model on the JVM: Part 3 - The Final Chapter

The Actor Model on the JVM: Part 3 - The Final Chapter

Complete implementation guide to the Actor Model with advanced patterns, testing strategies, and real-world lessons learned from building scalable concurrent systems.

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Arthur CostaAArthur CostaJul 19, 202511 min read19 views