Luciano Leggieri

Software Engineer / 🇦🇷 🇦🇺

[Luciano Leggieri @lucianoadrian]

I'm a big supporter of "everyone can do whatever they want with their lives" but it reinforces the notion that people without commitments that can spend their time outside of works doing AI/leetcode/YT videos are better rewarded than people with a busy life.

[Luciano Leggieri @lucianoadrian]

100% this. I think of it every time a listen to someone on a podcast saying "I spent the weekend building X with this Claude/Codex/whatever"

[Dejan Stamenov @DejanStamenov]

Unpopular opinion: weekends are for the family.

Otherwise, not a bad gift. People will probably burn through those $ in ~2h.

👋

[Luciano Leggieri @lucianoadrian]

If you think "I want to record a video" which button are you pressing?

[Luciano Leggieri @lucianoadrian]

Back to Uni then.

[𝗠𝗶𝗰𝗵𝗮𝗲𝗹 𝗞𝗼𝘃𝗲 @michael_kove]

If your job is software developer

Pivot to Consulting, Sales or Farming

Will not explain.

[Luciano Leggieri @lucianoadrian]

You can't reuse the name if you want to track impact.

[Michael Barney Jr @mbarneyjr]

> client-s3: Added support for annotations. You can now attach up to 1000 annotations directly to objects and create, retrieve, list, and delete them using new annotation APIs.

S3 has tags, metadata, and now annotations?
https://t.co/0zUxQmVHKn

[Luciano Leggieri @lucianoadrian]

The roadmap is filled with projects that will be presented at events, meetups, and conferences.

[mikku @mikkurogue]

tech lead says we are building an event driven system, but doesnt want to do events

what a fucking dipshit

[Luciano Leggieri @lucianoadrian]

Efforts to help the company save money were part of their job description. Smiling wasn't.

[rekdt @rekdt]

True story, I was nominated for employee of the quarter for saving our company millions of dollars a month for rearchitecting a complicated legacy app

But they gave the award to a girl in HR because “she shows up every day with a smile on her face”

[Luciano Leggieri @lucianoadrian]

Mi timeline es una mezcla de Mundial, más IA deja a todos sin trabajo, más Elon presidente del planeta.

[Luciano Leggieri @lucianoadrian]

I wonder how PureScript works with agents.

[mark_l_watson @mark_l_watson]

I find TypeScript works well with AI coding agents. I just released a TypeScript book "Practical TypeScript Artificial Intelligence Programming" that can be read for free online: https://t.co/b0dOQAUcGH Enjoy! In the past I only used JavaScript or TypeScript when I had to but this year I have been enjoying TypeScript and have started using it for some projects.

[Luciano Leggieri @lucianoadrian]

I'll wait for the Ç-shaped architect.

[deararchitects @deararchitects]

From T-shaped to M-shaped architect.

AI lowers the barrier to code but raises the bar on building the right thing.

The GOTO episode with Teena & Luca nails it: empathy + elevator skills now matter more than ever.

How is AI changing your role as an architect?

🧵

[Luciano Leggieri @lucianoadrian]

We need a LeetCode-style page, but for these.

[Anupam Haldkar  @AnupamHaldkar]

As a Backend Developer, Slap yourself if you cannot clearly explain at least 10 of the following:

TCP congestion control algorithms
TLS 1.3 handshake internals
HTTP/2 multiplexing & HPACK
HTTP/3 + QUIC packet loss recovery
Connection pooling pitfalls
Zero-downtime deployment strategies
Database transaction isolation levels (serializable vs snapshot)
B-tree vs LSM-tree index internals
Query planner & cost-based optimization
Deadlock detection & prevention
ACID vs BASE trade-offs
Two-phase commit vs Saga pattern
Distributed locking (Redlock pitfalls)
CAP theorem in practice
CRDTs & conflict-free replicated data types
Eventual consistency anti-patterns
Kafka partition rebalancing & exactly-once semantics
RabbitMQ dead-letter queues & message ordering
gRPC streaming + flow control
GraphQL resolver batching & N+1 problem
OAuth2 token introspection vs JWT validation
Rate limiting algorithms (token bucket vs leaky bucket)
Circuit breaker + bulkhead patterns
Observability: OpenTelemetry tracing propagation
Prometheus metric cardinality explosion
Log aggregation with sampling
Memory-mapped files vs traditional I/O
Garbage collection tuning (G1 vs ZGC)
Thread pools vs virtual threads (Project Loom)
Actor model vs shared-memory concurrency
Message-driven architecture (Akka / Orleans)
CQRS + Event Sourcing projections
Outbox pattern for reliable events
Sharding strategies & hot partition avoidance
Read replicas lag monitoring
Database connection pool exhaustion
Prepared statement caching
Index bloat & vacuum strategies
Kubernetes pod disruption budgets
Service mesh traffic shifting
Serverless cold-start mitigation
API gateway throttling & caching layers
Background job queues (Celery / BullMQ) retry semantics
Distributed cache invalidation (cache-aside vs write-through)
Eventual consistency in cache
Idempotency keys in API design
Optimistic locking with version vectors
Paxos / Raft consensus internals
Byzantine fault tolerance basics
Chaos engineering principles
Database failover & split-brain prevention
Microservices observability (distributed tracing)
API contract testing (Pact / Spring Cloud Contract)
Backward-compatible schema evolution
Protobuf vs JSON performance trade-offs
Binary protocol parsing
Zero-copy networking (sendfile)
epoll / kqueue internals
Syscall overhead & context switching
Memory barriers & CPU cache coherence
Lock-free data structures
Bloom filters & HyperLogLog in practice
Consistent hashing for load balancing
Virtual memory & page faults impact
Container runtime security (seccomp, AppArmor)
Sidecar pattern limitations
Service discovery (Consul vs DNS)
Blue-green vs canary deployments
Feature flags with rollout strategies
Data pipeline backpressure handling
Exactly-once processing guarantees
Idempotent consumers in event streams

And if you only know 10 — kindly return the “Senior Backend Developer” title. 😄

[Luciano Leggieri @lucianoadrian]

Linux: Should I use overlay or native filesystem snapshot capabilities for Docker?
Mac/Windows: Should I use one Virtual Machine per container or a shared one for all?

[Luciano Leggieri @lucianoadrian]

I could barely keep my eyes open at 4pm, but I'm fully awake at 2am.

[Luciano Leggieri @lucianoadrian]

First thing will be to rename wslc to container

[Windows Developer @windowsdev]

WSL containers ⚡

At #MSBuild, we announced a built-in way to create, run, and interact with Linux containers on Windows.

Watch the demo on demand: https://t.co/NVotUyk1U9

[Luciano Leggieri @lucianoadrian]

Or maybe we could start documenting software and decisions

[Erik Meijer @headinthebox]

When companies like Meta or Microsoft lay of experienced people or make their lives so miserable that they voluntarily leave, they are unknowingly erasing institutional memory.

Every company's infrastructure is chock full of Chesterton's fences and stays up because of unwritten processes.

The code bases are typically huge, so nobody can understand them end-to-end. When the people that know the history are gone, the only thing the remaining crew can do is fight fires and make cosmetic changes at the edges. Rewriting from scratch is not an option since, as your favorite AI will say, the software has become load bearing for the company's success.

The good news is that I think for green-field code, vibe coding offers a way to avoid this trap by embracing the invariant that all software should be evolvable without any human needing, or even be allowed, to understand the inner workings of it.

Only if you take the human developer completely out of the loop like this, you can ensure that software never atrophies into legacy software.

This may sound radical to AI coding deniers, but the reality is that code inevitably becomes incomprehensible for humans, so the rational solution is to just assume it is like so from the start.

[Luciano Leggieri @lucianoadrian]

I'm happy to share that I'm starting a new position as a Loop Agentic Model Engineer.

[Тsфdiиg @tsoding]

Good software is invisible. That's why all software is bad because the managers demand visibility of programmers work.

[Luciano Leggieri @lucianoadrian]

Magazine article mentioned a teen by the name of John Connor.

[Logan Bolton @septisum]

Just asked GPT-5.5-Pro a hard math problem and in the chain of thought I can see it reading teenvogue

[Luciano Leggieri @lucianoadrian]

@BrianOConner @GuruPundit @MarioNawfal Maybe first robots kill half the planet population and remaining humans do space exploration and meet aliens.

Then a few thousand years later robots kill half the population across the universe and remaining humans evolve in counciousness with sandworm poo.

[Luciano Leggieri @lucianoadrian]

Cuál va a ser la camada de niños criados por IA?