Product
Problem definition, product scope, positioning, early-access model, and customer use cases.
Software architect & developer
Alessandro
De Stasio.
I design and build software. For more than thirty years, that has meant understanding the business, choosing the right architecture, and staying close to the code.
Based in Florence, Italy.
Founder of devFlorence. Creator of Diaktor.
Current focus
What I am working on.
I work with organizations through devFlorence and develop Diaktor, my own messaging product. Both keep architecture close to implementation.
The studio
devFlorence
Senior-led software development for dedicated applications, integrations, and reactive platforms shaped around real business processes.
- Architecture
- Modern Java
- AWS
- Direct collaboration
The product
Diaktor
Secure, Matrix-compatible real-time communication deployed as an elastic serverless platform in the customer’s AWS account.
- E2EE
- Serverless
- Real-time
- Federation
Selected experience
Selected experience.
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Founder, devFlorence · Creator, Diaktor
Product leadership, AWS serverless architecture, Java engineering, Matrix federation, and complete product delivery.
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Matrix server engineering · Kosyma
Senior architecture and development in an international team building a Java and Quarkus Matrix server on AWS.
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Cloud-native distributed systems
Architecture and development of a Java, Quarkus, Kafka, and Kubernetes log aggregation platform.
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Long-term architecture ownership · Tuscany Region
Designed, led, and evolved the Tuscany Region's European Social Fund system with Java web technologies across more than a decade.
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Early web, finance, healthcare, and enterprise Java
From Linux hosting and CGI/Perl to Java-based banking and booking applications, healthcare systems, and enterprise Java consulting and training.
Featured product · Diaktor
Diaktor: a messaging product I built.
Diaktor is where product decisions, distributed architecture, cryptography, interoperability, infrastructure, UX, and technical positioning meet in one system.
Visit diaktor.net
01
Client experience
Diaktor web client
Matrix-compatible E2EE · real-time push
02
Customer-owned runtime
AWS serverless core
Java 25 · Quarkus · Lambda · DynamoDB · AppSync Events
03
Open ecosystem
Matrix federation
Synapse and compatible homeservers
Architecture
Event flows, federation, security boundaries, AWS services, and operational trade-offs.
Engineering
Java backend, web client, infrastructure, tests, documentation, and production discipline.
Storytelling
UX, visual identity, technical diagrams, product website, and buyer-facing communication.
Engineering approach
How I approach the work.
Tools and runtimes change. The difficult work remains understanding the problem, choosing the right boundaries, removing unnecessary scope, and staying accountable for what reaches production.
Business fit before abstraction
Model the process and its constraints before choosing patterns or platforms.
Architecture close to code
Technical direction remains grounded in implementation, tests, and operational reality.
Ownership end to end
Keep continuity from discovery and architecture through delivery and production.
AI as a working tool
Use AI to accelerate exploration and execution without outsourcing judgment or accountability.
The devFlorence model
Working together through devFlorence.
devFlorence is the studio through which I work directly with organizations that need senior architecture and hands-on delivery without agency layers.
Explore the studioFull record