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⚡ AI Lessons

Dev.to · Dinesh_gowtham
🔧 Backend Engineering
⚡ AI Lesson
1w ago
We Deleted 300 Lines of Code After Discovering Node.js 22's Hidden Perf Feature
Node.js 22's built-in diagnostics channel is being criminally underused. This week, our team stumbled...

Dev.to · Dinesh_gowtham
☁️ DevOps & Cloud
⚡ AI Lesson
1w ago
Step Functions Broke Our Lambda Cold Starts — But Fixed Our EventBridge Delays
We migrated 15 Lambdas to Step Functions to solve cold starts, but what we gained in warmness, we...

Dev.to · Dinesh_gowtham
☁️ DevOps & Cloud
⚡ AI Lesson
2w ago
IAM Access Analyzer Lied to Us: The $1,000/Month Overprovisioning Mistake
A month ago, we thought we'd solved our access control issues with IAM Access Analyzer. But a closer...

Dev.to · Dinesh_gowtham
2w ago
Kinesis Data Firehose Is Not a Silver Bullet: How Undocumented Partition Key Limits Broke Our Real-Time Analytics Pipeline
Our real-time data pipeline was failing due to mysterious throughput limits. The culprit? A...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
ElastiCache Is Not a Silver Bullet: How We Fixed Node.js 22 Performance Issues with Undici and AsyncLocalStorage
We thought ElastiCache was the answer to our Node.js 22 performance woes, but it only masked the...

Dev.to · Dinesh_gowtham
1mo ago
TypeScript satisfies + AWS SDK v3: The Pattern That Changed How I Write Commands
Last week, we migrated 12 of our Lambda handlers to TypeScript 5.5 and discovered the satisfies...

Dev.to · Dinesh_gowtham
1mo ago
CloudFront Cache Invalidation Costs Are Eating Into Our AWS Budget — Here's the Fix We Wish We Knew
Our CloudFront usage bill skyrocketed after a simple cache configuration mistake. Here's how we...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
We Replaced Jest With node:test in 12 Services — Here's What Broke and What Didn't
After months of using Jest for unit testing, we decided to take the plunge and migrate to the...

Dev.to · Dinesh_gowtham
1mo ago
We Replaced Redis with ElastiCache and Got 3x Better Performance for 20% of the Cost
Our team discovered that ElastiCache not only outperforms Redis in terms of speed but also costs...

Dev.to · Dinesh_gowtham
🔐 Cybersecurity
⚡ AI Lesson
1mo ago
The Confused Deputy Problem in AWS: Why Your Cross-Account Lambda Might Be Exploitable
We thought our cross-account Lambda setup was secure, but a single misconfigured IAM role put our...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
We Spent 3 Months Mastering CDK TypeScript Generics — Here's the One Thing That Broke
AWS CDK is a powerful tool, but mastering its TypeScript generics can be a nightmare. We spent months...

Dev.to · Dinesh_gowtham
📣 Digital Marketing & Growth
⚡ AI Lesson
1mo ago
Why IAM Roles for AWS Lambda Are Overkill: A Simpler Alternative Using IAM Policies
As AWS Lambda adoption grows, so does the complexity of managing IAM roles. But what if you could...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
typescript 55 satisfies changed our aws sdk v3commands
We refactored 200 lines of AWS SDK v3 command type casting to a single line using TypeScript...

Dev.to · Dinesh_gowtham
☁️ DevOps & Cloud
⚡ AI Lesson
1mo ago
cdktypescriptmigrationsilos
Our team spent 3 months migrating 27 CDK projects to TypeScript 5.5, only to discover a hidden issue...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
We Replaced Jest with Node's Built-in Test Runner in 12 Services — The 3 Lines of Code That Made It Possible
As we continued to scale our serverless architecture on AWS, our test suite had become a bottleneck....

Dev.to · Dinesh_gowtham
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1mo ago
Athena Queries Broke the Bank: How We Saved $1200 by Fixing 3 Simple Mistakes
The Surprising Cost of Athena Queries We started by investigating our Athena queries,...

Dev.to · Dinesh_gowtham
⚡ AI Lesson
1mo ago
The Dirty Truth About npm Package Versions: How We Broke Our Lambda Deployment
We spent 48 hours debugging a Lambda deployment issue only to find the culprit was an outdated npm...

Dev.to · Dinesh_gowtham
1mo ago
Kinesis Data Firehose Is Burning Our Budget: One Setting Changed Everything
Kinesis Data Firehose promises efficient data processing, but a single misconfigured setting can lead...

Dev.to · Dinesh_gowtham
1mo ago
S3 Express One Zone Broke Our Code: The Hidden API Differences
We thought S3 Express One Zone would be a drop-in replacement for our standard S3 buckets. Instead,...

Dev.to · Dinesh_gowtham
1mo ago
Lambda Cold Starts Are Not Solved — They Moved to INIT Phase
Despite the hype, Lambda cold starts persist, and the problem has just shifted to the INIT phase. We...

Dev.to · Dinesh_gowtham
1mo ago
BunOnLambda Broke Our NodeJsApis But Saved Us 40% On Lambda Costs
After migrating 15 Lambdas to BunOnLambda, we saw a whopping 40% reduction in Lambda costs but also...

Dev.to · Dinesh_gowtham
1mo ago
BunOnLambda Is 3x Faster But Breaks 20% Of NodeJsApis
We ran BunOnLambda for 60 days and achieved 3x faster cold starts than Node.js 22, but 20% of our...

Dev.to · Dinesh_gowtham
1mo ago
Bun on Lambda Is Faster Than Node.js 22 — But Is It Production Ready?
After running Bun on Lambda for 60 days, we discovered it's 3x faster than Node.js 22. However, the...

Dev.to · Dinesh_gowtham
📣 Digital Marketing & Growth
⚡ AI Lesson
1mo ago
SQS Partial Batch Failure: The Default That Silently Drops Your Messages
We were losing critical messages in our SQS workflow without realizing it, until we dug into the SQS...
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