Ajit | Dev | singhajit.com

🧵 If you are preparing for system design interview or interested in system design in general, here is a gold mine you want to bookmark: 👇

🗞️ Dev Weekly #42 edition [4 May - 10 May] ⏺️ Anthropic Signs SpaceX for the Colossus 1 Supercluster ⏺️ Cloudflare Cuts 1,100 in Agentic AI Pivot ⏺️ AWS Ships Bedrock AgentCore Payments and the AWS MCP Server ⏺️ Cursor 3.3 Brings PR Review Into the Agents Window ⏺️ xAI Launches Grok 4.3 ⏺️ OpenAI Ships Three New Realtime Audio Models singhajit.com/dev-weekly/202…

🔖 Published another post in System Design series: How to Design TinyURL (URL Shortner) It covers: • Capacity estimation • Base62 short codes • Snowflake IDs vs KGS • SQL vs NoSQL • Caching • 301 vs 302 redirects • Async analytics • Custom aliases & abuse singhajit.com/tinyurl-system… #systemdesign #techblog

🗞️ Dev Weekly #41 edition [27 Apr - 3 May] ⏺️ Microsoft and OpenAI restructure their partnership, ending exclusivity ⏺️ AWS lights up OpenAI models, Codex, and Managed Agents on Bedrock ⏺️ Pentagon signs eight Big Tech vendors for classified AI on IL6 and IL7, Anthropic excluded ⏺️ Apple posts best March quarter ever at $111.2B with $57B in iPhone revenue and a $100B buyback ⏺️ Anthropic launches Claude Security in public beta on Opus 4.7 singhajit.com/dev-weekly/202…

🔖 New Post: Saga Pattern Explained (Distributed Transactions for Microservices) It covers: • What a saga actually is (with a 1987 paper origin story) • Why ACID dies the moment you split into services • Choreography vs Orchestration • Compensating transactions and the pivot point • Why sagas need the Outbox pattern to survive • Idempotency, isolation, and semantic locks • Temporal, AWS Step Functions, Camunda, Eventuate • 10 production pitfalls that catch every team singhajit.com/saga-pattern-d…

🔖 New post: Vector Database Deep Dive Covers: • HNSW and IVF • Product quantization • pgvector vs Pinecone vs Qdrant vs Weaviate vs Milvus • Hybrid search and reranking • 7 production pitfalls singhajit.com/vector-databas…

Ever wondered what really happens after you hit git push? 🔖 New post: How GitHub stores and serves Git repositories. - Three-replica Spokes architecture - Three-phase commit on every push - Pack files, multi-pack-index, reachability bitmaps - Reftable for million-ref monorepos - Git LFS for big binaries singhajit.com/how-github-sto… #systemdesign #git #github

🔖 New post: PostgreSQL Internals: How Queries Actually Execute How a query travels through the parser, planner, and executor, how MVCC and the WAL fit in, and how to read EXPLAIN ANALYZE plans like the planner does. Covers: - Process architecture - Parser, rewriter, planner, executor - Shared buffers and WAL - MVCC, xmin, xmax - Reading EXPLAIN ANALYZE singhajit.com/postgresql-int…

We're partnering with SpaceX to improve Composer. cursor.com/blog/spacex-mo…

🔖 Published another blog post in distributed systems series. Lamport Clock in Distributed Systems Covering: - Why wall clocks lie across nodes - The happens-before relation in 3 rules - The algorithm: max(local, received) + 1 - Where it hides in Cassandra, Kafka, and Raft - Lamport vs vector vs hybrid logical clocks singhajit.com/distributed-sy…

🗞️ Dev Weekly #39 edition [13 Apr - 19 Apr] ⏺️ Claude Opus 4.7 retakes the coding lead ⏺️ OpenAI Codex desktop ships Computer Use, in-app browser, image gen, 111 plugins ⏺️ Microsoft Patch Tuesday: 167 CVEs ⏺️ Snap lays off 1,000 (16%) ⏺️ Cursor 3.1 ships tiled multi-agent layouts ⏺️ Cloudflare expands Agent Cloud, rebuilds Wrangler CLI for AI agents ⏺️ OpenAI Agents SDK gets a sandbox harness ⏺️ GitHub adds Claude/Codex model picker ⏺️ AWS launches Agent Registry, Interconnect multicloud, Claude Mythos on Bedrock ⏺️ Anthropic debuts Claude Design ⏺️ DeepMind releases Gemini Robotics-ER 1.6 ⏺️ Nvidia open-sources Ising for quantum error correction ⏺️ OpenAI launches GPT-5.4-Cyber for vetted security pros ⏺️ AI coding agents from Anthropic, Google, Microsoft found leaking GitHub creds ⏺️ OpenAI confirms limited Axios npm exposure in macOS code-signing pipeline ⏺️ Slash raises $100M, Sygaldry $139M, Helical $10M Full breakdown: singhajit.com/dev-weekly/202…

🔖 Published new blog post in distributed systems series. Hybrid Logical Clock in Distributed Systems Covering: - Why Lamport clocks and wall clocks both fall short - How HLC packs causal order + wall time into 64 bits - The send, receive, and local event algorithm - How CockroachDB, MongoDB, and YugabyteDB use it - HLC vs Lamport vs vector clocks vs Spanner's TrueTime singhajit.com/distributed-sy…

New toy to play with 👨‍💻

🔖 New post: Low Watermark - How Distributed Systems Know What's Safe to Delete What's covered: ⏺️ What is Low Watermark ⏺️ Why write-ahead logs grow forever without cleanup ⏺️ How Kafka uses Log Start Offset and retention policies ⏺️ Snapshot compaction in etcd and Raft ⏺️ PostgreSQL WAL cleanup with replication slots ⏺️ What goes wrong when you get it wrong ⏺️ Real-world usage in Kafka, etcd, PostgreSQL, ZooKeeper singhajit.com/distributed-sy… #DistributedSystems #DistributedSystemsPatterns

🔖 New post: High Watermark - How Distributed Systems Know What's Safe to Read What's covered: ⏺️ Why serving unreplicated data is dangerous ⏺️ How Kafka uses High Watermark with ISR and LEO ⏺️ Raft's commit index (same pattern, different name) ⏺️ High Watermark vs Low Watermark ⏺️ Leader failover safety ⏺️ Real-world usage in Kafka, etcd, CockroachDB, ZooKeeper singhajit.com/distributed-sy…

🗞️ Dev Weekly #38 edition [6 Apr - 12 Apr] ⏺️ Anthropic launches Project Glasswing with Claude Mythos ⏺️ Intel joins Musk's $25B Terafab AI chip factory ⏺️ Anthropic revenue hits $30B run rate, expands Google Cloud TPU deal ⏺️ GitHub Copilot CLI adds Rubber Duck cross-model review ⏺️ VS Code 1.115 launches the Agents app ⏺️ Chrome 147 ships vertical tabs ⏺️ AWS launches S3 Files ⏺️Dependabot alerts are now assignable to AI agents ⏺️Oracle upgrades AI Database with sub-3-second failover ⏺️NeuBird AI raises $19.3M ⏺️Bolt lays off 30% of staff citing AI ⏺️Red Hat shuts down China operations, lays off hundreds ⏺️Pendo cuts 10% of workforce citing AI shift ⏺️Docker authorization bypass affects 92% of enterprise deployments ⏺️Fortinet FortiClientEMS zero-day under active exploitation ⏺️GitHub expands secret scanning and code security singhajit.com/dev-weekly/202…

🔖 Published a new blog post on - REST vs GraphQL vs gRPC: How to Pick the Right API Protocol ▶️ How REST, GraphQL, and gRPC work under the hood ▶️ Over-fetching, under-fetching, and the N+1 problem ▶️ Protocol Buffers, HTTP/2 multiplexing, and gRPC streaming ▶️ Performance, caching, error handling, and security compared ▶️ Real-world architecture patterns from Netflix, Uber, and GitHub ▶️Migration strategies and common mistakes singhajit.com/rest-vs-graphq…

@sundarpichai Please provide a feature to auto close temporary tabs after 24 hours similar to Arc Browser.

T A B S I N C H R O M E

🔖 Published a new blog post on the Transactional Outbox Pattern for reliable message publishing in microservices. Covers: ▶️ The dual write problem and why retries don't fix it ▶️ Outbox table schema design ▶️ Polling relay vs CDC with Debezium ▶️ Making consumers idempotent ▶️ How it fits with CQRS, Saga, and 2PC ▶️ Monitoring singhajit.com/transactional-…

🗞️ Dev Weekly #37 edition [30 March - 5th Apr] ⏺️ North Korean hackers hijack axios on npm, deploy RAT to millions ⏺️ Anthropic accidentally leaks 512K lines of Claude Code source via npm ⏺️ Oracle cuts up to 30,000 jobs to fund $50B AI data center buildout ⏺️ Cursor 3 ships with agent-first interface ⏺️ Google releases Gemma 4 under Apache 2.0 ⏺️ GitHub Copilot SDK enters public preview ⏺️ Microsoft open sources Agent Governance Toolkit ⏺️ Chrome zero-day #4 of 2026 patched ⏺️ $240M raised across Coder, Qodo, and Depthfirst singhajit.com/dev-weekly/202…

🔖 Wrote a guide covering what it actually takes to setup OpenTelemetry in Production: ⏺️ Collector pipeline setup ⏺️ Auto-instrumentation for Java, Python, Go ⏺️ Head vs tail sampling ⏺️ Kubernetes deployment (DaemonSet + gateway) ⏺️ Security and PII scrubbing ⏺️ Monitoring the pipeline itself ⏺️ Common mistakes to avoid singhajit.com/opentelemetry-…