Selected Work

Open-source systems built from first principles.

github.com/massenzgo-statemachine
Open source

go-statemachine

2022

An event-driven finite-state-machine service with a gRPC API, asynchronous SQS processing, and Redis-backed persistence.

GogRPCRedisAWS SQS
github.com/massenzdistlib
Open source

distlib

2021

Modern C++ building blocks for distributed systems, including consistent hashing, Merkle trees, and a concurrent key-value store.

C++17Distributed SystemsConsistent HashingMerkle Trees
github.com/massenzgossip
Open source

gossip

2021

A reference implementation of SWIM-based membership and fault detection with gossip dissemination and runnable demo servers.

C++17SWIMZeroMQProtobuf
github.com/massenzjwt-opa
Open source

jwt-opa

2021

A Spring WebFlux integration that separates JWT authentication from policy-driven authorization with Open Policy Agent.

JavaSpring WebFluxJWTOPA
About & Craft

Building beneath the interface.

I am an engineering leader and hands-on principal engineer with more than two decades of experience building large-scale backend systems and cloud infrastructure. My work has spanned teams at Apple, Google, Adobe, Meta, and high-growth startups.

Today I focus on platforms for distributed AI workloads: global Kubernetes infrastructure, heterogeneous GPU clusters, and the reliable systems that connect them. I still spend a substantial part of my time writing Go, C++, and Python.

The Workbench

Languages
GoC++PythonJava
Platforms
KubernetesCloud InfrastructureAWSDockerGPU Infrastructure
Systems
Distributed SystemsgRPC & ProtobufRedis & SQSOPA & JWT
Connect

Let's compare notes on hard systems problems.

© 2026 Marco Massenzio.
Pacific TimeBuilt with Next.js & Tailwind